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Journal : Jurnal Hortikultura Indonesia

STUDI AKUMULASI PIGMEN β-CRYPTOXANTHIN UNTUK MEMBENTUK WARNA JINGGA BUAH JERUK DI DAERAH TROPIKA Sumiasih, Inanpi Hidayati; Arzam, Taruna Shafa; Poerwanto, Roedhy; Efendi, Darda; Agusta, Andria; Yuliani, Sri
Jurnal Hortikultura Indonesia Vol. 9 No. 2 (2018): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (934.285 KB) | DOI: 10.29244/jhi.9.2.73-83

Abstract

ABSTRACTDegreening is a transformation process on peel which enables it to change color from green to orange on citrus fruits. The orange color of the peel comes from the mixture of carotenoid pigments, such as ?-cryptoxanthin and ?-citraurin. The pigments contributed in the formation of ?-citraurin are ?-cryptoxanthin and zeaxanthin. The objectives of this study were (1) to obtain proper degreening temperature in the orange color formation of several citrus varieties, and (2) to identify and determine pigments of ?-cryptoxanthin pigment and total chlorophyll content in citrus peel after degreening. This study was conducted at PKHT IPB and LIPI Cibinong from July 2013 to December 2013, and from February 2016 to May 2017. About 100 ppm of ethylene gas was injected into a citrus-containing box using 5 ml syringe, then the box was placed in cool storage at 15 0C, 20 0C and room temperature, for 72 hours. The results showed that the best colors of Keprok Selayar and Keprok Tejakula were obtained by the degreening at 15 0C, in Siam Kintamani it was obtained by degreening at 20 0C. Degreening significantly reduced the total chlorophyll content, and increased ?-cryptoxanthin content. The content of ?-cryptoxanthin after degreening was 3 folds higher on highland Citrus reticulata than lowland citrus.Keywords: citrus color index, chlorophill, degreening, ethylene, tropical citrusABSTRAKDegreening adalah proses perombakan warna hijau pada kulit jeruk diikuti dengan proses pembentukan warna jingga. Warna jingga adalah campuran antara ?-cryptoxanthin dengan ?-citraurin. Pigmen yang berkontribusi dalam pembentukan ?-citraurin adalah ?-cryptoxanthin dan zeaxanthin. Tujuan penelitian ini ialah (1) Mendapatkan suhu degreening yang tepat dalam pembentukan warna jingga pada beberapa varietas jeruk, (2) Identifikasi dan penentuan kadar pigmen ?-cryptoxanthin dan kandungan total klorofil pada kulit jeruk setelah degreening. Penelitian ini dilakukan di PKHT IPB dan LIPI Cibinong pada bulan Juli 2013 sampai Desember 2013, dan bulan Februari 2016 sampai Mei 2017. Degreening dilakukan dengan menginjeksikan gas etilen konsentrasi 100 ppm ke dalam wadah tertutup yang berisi jeruk menggunakan syringe 5 ml, kemudian disimpan pada suhu 15 0C, 20 0C dan suhu ruang, selama 72 jam. Hasil penelitian menunjukkan bahwa warna terbaik jeruk Keprok Selayar dan Tejakula diperoleh dengan degreening pada suhu 15 0C, Siam Kintamani diperoleh dengan degreening pada suhu 20 0C. Degreening dapat menurunkan kandungan total klorofil secara tajam, dan terbukti meningkatkan kandungan pigmen ?-cryptoxanthin. Kandungan pigmen ?-cryptoxanthin setelah degreening 3 kali lebih tinggi pada jeruk keprok dataran tinggi dibandingkan dengan dataran rendah.Kata kunci: citrus color index, degreening, etilen, jeruk tropika, klorofil
APLIKASI KALSIUM DAN NAA UNTUK MENGENDALIKAN GETAH KUNING BUAH MANGGIS (GARCINIA MANGOSTANA L.) Tanari, Yulinda; Efendi, Darda; Poerwanto, Roedhy; Sopandie, Didy; Suketi, Ketty
Jurnal Hortikultura Indonesia Vol. 9 No. 1 (2018): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (207.793 KB) | DOI: 10.29244/jhi.9.1.10-18

Abstract

ABSTRACTThe yellow sap is produced naturally in mangosteen organ except in the root. The yellow sap contaminated the aryl and rind if the epithelial cell walls rupture due to deficiency of calcium (Ca). Calcium is one of structural component of cell walls, whereas naphthaleneacetic acid (NAA) has its role in improving cell division and cell elongation. Interaction of Ca and NAA can improve sink strength and capacity because the newly formed cells need Ca to construct wall structure. This experiment aimed at finding out the effect of Ca and NAA applications in reducing the contamination of yellow sap in mangosteen. The experiment was conducted by using factorial random block design consisting of 2 factors and 3 replications. The first factor was Ca dosage (0 and 4.8 kg/tree), and the second factor was NAA concentration (0, 200, 400 and 600 ppm). The results showed that application of 4.8 Ca/tree and 200 ppm NAA as much as 5 ml / fruit effectively improve the content of Ca pectate in pericarp, reduced the percentage of yellow sap contamination on the fruit segment, aryl and rind to 0% and 12.3% respectively compared to control (17.8% on fruit segment, 36.8% on aryl and 56.1% on rind).Key words: aryl, Ca pectate, cell wall, middle lamela.ABSTRAKGetah kuning adalah getah yang dihasilkan secara alami pada setiap organ manggis, kecuali pada akar. Getah kuning akan keluar dan mencemari aril serta kulit jika dinding sel epitel pecah karena kekurangan kalsium (Ca). Kalsium adalah komponen dinding sel, berperan dalam struktur dan permeabilitas membran sedangkan asam naftalenasetat (NAA) berperan penting dalam meningkatkan pembelahan dan pembesaran sel. Interaksi keduanya dapat meningkatkan kapasitas sink buah karena sel yang baru terbentuk membutuhkan Ca dalam menyusun struktur dinding sel. Percobaan bertujuan untuk mengetahui pengaruh aplikasi Ca dan NAA dalam menurunkan cemaran getah kuning manggis. Percobaan menggunakan rancangan acak kelompok faktorial 2 faktor dengan 3 ulangan. Faktor ke-1 yaitu dosis Ca (0 dan 4.8 kg Ca/pohon) dan faktor ke-2 yaitu konsentrasi NAA (0, 200, 400 dan 600 ppm) dengan volume semprot 5 ml perbuah. Hasil percobaan menunjukkan bahwa aplikasi 4.8 kg Ca/pohon dengan NAA 200 ppm sebanyak 5 ml/buah efektif meningkatkan kandungan Ca pektat perikarp dan menurunkan persentase buah tercemar getah kuning menjadi 0% pada juring dan aril serta 12.3% pada kulit dibandingkan dengan perlakuan kontrol (17.8% pada juring, 36.8% pada aril dan 56.1% pada kulit buah).Kata kunci: aril, Ca pektat, dinding sel, lamela tengah
DEGREENING BUAH JERUK SIAM (CITRUS NOBILIS) PADA BEBERAPA KONSENTRASI DAN DURASI PEMAPARAN ETILEN H., Nian Rimayanti; Poerwanto, Roedhy; Suketi, Ketty
Jurnal Hortikultura Indonesia Vol. 7 No. 2 (2016): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (323.836 KB) | DOI: 10.29244/jhi.7.2.111-120

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ABSTRACTSiam tangerine peel is green when harvested. Degreening technology by ethylene can improve the citrus peel color becomes uniformly orange. Degreening is a process to break down green pigment (chlorophyll) on citrus peel chemically and form the orange color (carotene) without affecting internal quality of fruit. The purpose of this research was to determine the effect of ethylene concentration and ethylene exposure duration to bring out the color on Siam tangerine from Banyuwangi. Ethylene 0, 100, 200 ppm was injected into the box containing 2.8 kg citrus and was exposed to the cooling chamber with a temperature 18 0C for 24 hours ethylene + 48 hours without ethylene, 48 hours ethylene + 24 hour without ethylene and 72 hours ethylene. Ethylene exposure was conducted using multiple shots method. After exposure, tangerines were put at room temperature condition. Observations were conducted every two days: (a) non-destructive observation conducted using color reader to determine the color changes; (b) destructive observations for measuring chlorophyll and carotenoids content and physico-chemical changes i.e. the hardness, soluble solid content, titratable acidity and vitamin C. The results showed that the best combination was 200 ppm ethylene concentration for 48 hours ethylene exposure. This degreening technique altered the Citrus Colour Index (CCI) value from -1.60 to be 6.50, changed the tangerines into a bright orange. Degreening did not give negative impact on internal quality.Key words: carotenoid, chlorophyll, citrus color index, cooling chamber, tropical citrus         ABSTRAKWarna kulit buah jeruk siam saat dipanen umumnya hijau. Teknologi degreening menggunakan gas etilen dapat memperbaiki warna kulit jeruk tropika menjadi jingga. Degreening merupakan proses perombakan pigmen hijau (klorofil) pada kulit jeruk secara kimiawi dan membentuk warna jingga (karotenoid) tanpa mempengaruhi kualitas internal buah. Penelitian bertujuan mengkaji pengaruh konsentrasi dan durasi pemaparan etilen untuk menstimulasi pigmen jingga dan pengaruhnya terhadap sifat fisikokimia jeruk siam Banyuwangi. Degreening jeruk menggunakan etilen 0, 100, dan 200 ppm diinjeksikan ke dalam box degreening yang berisi jeruk 2.8 kg dan dipaparkan pada cooling chamber dengan suhu 18 0C selama 24, 48, dan 72 jam. Pengamatan dilakukan setiap dua hari: (a) pengamatan non-destruktif dengan menggunakan color reader untuk mengetahui perubahan warna; (b) pengamatan destruktif dengan mengukur kekerasan, kandungan klorofil dan karotenoid, Padatan Terlarut Total (PTT), Asam Tertitrasi Total (ATT) dan vitamin C untuk mengetahui perubahan fisikokimia jeruk. Hasil penelitian menunjukkan perubahan warna kulit buah mulai terjadi pada hari ke 4 setelah perlakuan degreening. Konsentrasi etilen terbaik adalah 200 ppm dengan durasi pemaparan 48 jam yaitu dapat meningkatkan kualitas warna buah jeruk siam dari hijau menjadi jingga kekuningan dan mampu mengubah nilai Citrus Colour Index (CCI) dari -1.60 (hijau) menjadi 6.50 (jingga kekuningan), tanpa pengaruh negatif terhadap kualitas fisikokimia buah.Kata kunci: cooling chamber, citrus color index, jeruk tropika, karotenoid, klorofil
WAKTU DAN DOSIS APLIKASI KALSIUM DAN BORON UNTUK PENGENDALIAN GETAH KUNING PADA BUAH MANGGIS (GARCINIA MANGOSTANA L.) DI TIGA SENTRA PRODUKSI Kurniawan, Vandra; Poerwanto, Roedhy; Efendi, Darda
Jurnal Hortikultura Indonesia Vol. 7 No. 1 (2016): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (227.506 KB) | DOI: 10.29244/jhi.7.1.21-30

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ABSTRACTContamination of yellow sap (GK) in the mangosteen fruit leads to low quality of the mangosteen fruit. GK contamination occurs because the cell walls of the fruit is weak due to lack of calcium (Ca) and boron (B). Ca and B plays a role in maintaining the integrity of the cell wall. The study aimed to get the best treatment of dose and the time of application of Ca and B in controlling the contamination of GK on the aryl and mangosteen pericarp. This study used a nested design with 3 factors. First factor was study site, consisting of Cigudeg, Citeureup and Cikembar. The second factor was combination dose of fertilizer, consisting of control (without Ca + B), 1.6 kg Ca tree-1 + 1.553 g B tree-1, and 3.2 kg of Ca tree-1 + 1.553 g B tree-1. The third factor was time of fertilizer application, consisting of anthesis, stadia 1, and anthesis + stadia 1of fruit development. Result of the study showed that location which produced the best fruit was Cikembar where GK on aryl was 22.49% and on pericarp was 29.51%. A dose of 1.6 kg Ca tree-1 + 1.55 g B tree-1 and 3.2 kg Ca tree- 1 + 1.55 g B tree-1 were equally well in reducing GK contamination In aryl (19.91%) and pericarp (28.86%) compared to treatment without Ca and B which showed percentage of GK contaminated fruit on aryl was 50.00% and on pericarp was 56.46%. Ca and B application time was the best at stage 1, which lowered the percentage of GK contamination in aryl (40.44%) and pericarp (27.10%). Ca and B did not affect the physicochemical qualities including diameter, weight, hardness, total soluble solid, total titratable acidity of mangosteen fruit in three study sites.Keywords: fertilization, immobile nutrient, cell wall, pericarp, yellow sap.ABSTRAKCemaran getah kuning (GK) pada buah manggis menyebabkan rendahnya mutu buah manggis. Cemaran GK terjadi karena dinding sel buah lemah akibat kekurangan unsur kalsium (Ca) dan boron (B). Ca dan B berperan dalam menjaga integritas dinding sel. Penelitian bertujuan untuk mendapatkan dosis dan waktu aplikasi Ca dan B yang terbaik dalam mengendalikan cemaran GK pada aril dan kulit buah manggis. Penelitian ini menggunakan Rancangan Tersarang (Nested Design) 3 faktor. Faktor ke-1 adalah lokasi penelitian, terdiri dari Cigudeg, Citeureup dan Cikembar. Faktor ke-2 adalah kombinasi dosis pupuk yaitu kontrol (tanpa Ca + B), 1.6 kg Ca pohon-1 + 1.553 g B pohon-1, dan 3.2 kg Ca pohon-1 + 1.553 g B pohon-1. Faktor ke-3 adalah waktu aplikasi pupuk yaitu pada saar antesis, Stadia 1, dan Antesis + Stadia 1 dari perkembangan buah. Hasil penelitian menunjukkan bahwa lokasi penelitian dengan kualitas fisik buah terbaik adalah di Cikembar dengan persentase cemaran GK pada aril (22.49%) dan kulit (29.51%). Dosis 1.6 kg Ca pohon-1 + 1.55 g B pohon-1 dan 3.2 kg Ca pohon-1 + 1.55 g B pohon-1 sama baiknya dalam menurunkan cemaran GK di aril (19.91%) dan di kulit (28.86%) dibandingkan dengan perlakuan tanpa Ca dan B menunjukkan persentase buah tercemar GK pada aril (50.00%) dan kulit (56.46%). Waktu aplikasi Ca dan B yang terbaik adalah pada stadia 1 yang menurunkan persentase cemaran GK di aril (40.44%) dan kulit (27.10%). Ca dan B tidak mempengaruhi kualitas fisikokimia yang mencakup diameter, bobot, kekerasan, padatan terlarut total, asam tertitrasi total buah manggis di tiga lokasi penelitian.Kata kunci: pemupukan, hara tidak mobil, dinding sel, pericap, getah kuning.
PENGARUH APLIKASI KALSIUM TERHADAP GETAH KUNING PADA BUAH MANGGIS (GARCINIA MANGOSTANA L.) Wulandari, Indah; Poerwanto, Roedhy
Jurnal Hortikultura Indonesia Vol. 1 No. 1 (2010): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (932.613 KB) | DOI: 10.29244/jhi.1.1.27-31

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ABSTRACTThis experiment was conducted to study the effect of calcium applicatian on gamboge in mangosteen fruit. Calcium materials used in this research was dolomite. This research was conducted from November 2007 to April 2008 at mangosteen orchard, Karacak, Leuwiliang, Bogor. The treatment design was Randomized Completely Block Design with three replications. The experiment consist of one factor, i.e. dosages of calcium (0, 2.5, 3.0 and 3.5 ton Ca2+/ ha). The result showed that dolomite application with dosage of 3.5 ton Ca2+/ha reduced gamboge in mangosteen rind significantly than control (0 ton Ca2+ha- 1) but no significant effect on gamboge in mangosteen aryl.Key words: dolomite, dosages, rind, and aryl
STUDI KARAKTER MUTU BUAH PEPAYA IPB Suketi, Ketty; Poerwanto, Roedhy; Sujiprihati, Sriani; Sobir, ,; D.Widodo, Winarso
Jurnal Hortikultura Indonesia Vol. 1 No. 1 (2010): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1675.89 KB) | DOI: 10.29244/jhi.1.1.17-26

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ABSTRACTThe objective of the experiment was to investigate the physical and chemical characteristic of eight genotypes of papaya i.e. IPB1, IPB 2A, IPB 3, IPB 3A, IPB 4, IPB 7, IPB 8, and IPB 9 on two stages of ripening period based on percentage of the yellow area of fruit peel (75% yellow and 100% yellow). The fruits were picked at 25% yellow of fruit peel colour. The experiment was conducted in split plot wi th completely randomized block design. The main plot was ripening periods of 75% and 100% ripe, while the genotypes were taken at subplot. There was no significant different on physical and chemical characteristics between papaya at stadium 75% and 100% yellow. Flesh firmness of IPB 9 was better than IPB 1, IPB 4 and IPB 8. Ascorbic acid content of IPB 4 (107.36 mg/100 g) was higher than that of IPB 2A and IPB 3A. Carotenoid content of IPB 4 (29. 73 mg/100g) was higher than that of the other genotypes.Key words: Carica papaya, physical characteristic, chemical characteristic, ascorbic acid, carotenoid
SELEKSI HASIL PERSILANGAN ANTARA ‘QUEEN’ DAN ‘SMOOTH CAYENNE’ UNTUK PERBAIKAN HASIL DAN MUTU BUAH NENAS Nasution, Muhammad Arif; Poerwanto, Roedhy; Sobir, ,; Surahman, Memen; Trikoesoemaningtyas, ,
Jurnal Hortikultura Indonesia Vol. 1 No. 1 (2010): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1308.045 KB) | DOI: 10.29244/jhi.1.1.10-16

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ABSTRACTHybridization program was started in PKBT IPB Bogor in 2003, entangles of 12 parental cultivars, consisting of five type Smooth Cayenne cultivars and seven type Queen cultivars. The cross yielded 195 genotypes with various different character combinations. The result of cluster analysis based on morphological characters showed that there were 33 groups of hybrid at the degree of genetic similarity of 50%. The result of principal component analysis indicated that, between yield component characters and result most importantly, were fruit weight, fruit diameter and fruit length which were main supporting character of variance in hybrid result of the crosses. Descriptive results of fruit yield and quality characters showed three to five classes with the highest number of individuals around the mean value for each character. Fruit weight, crown weight, fruit length, fruit diameter, flesh thickness, core diameter, total soluble solid (TSS), total acid, vitamin C, pH, plant height, and peduncle length, were characters controlled by nuclear genes.Key words : hybridization, variability, Smooth Cayenne, Queen, genotype
EFEKTIFITAS APLIKASI IN-VITRO RIZOBAKTERI SEBAGAI AGEN ANTAGONIS LAYU FUSARIUM PADA PISANG RAJABULU/AAB DI RUMAH KACA ., Kasutjianingati; Poerwanto, Roedhy; ., Widodo; Khumaida, Nurul; Efendi, Darda
Jurnal Hortikultura Indonesia Vol. 2 No. 1 (2011): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (348.824 KB) | DOI: 10.29244/jhi.2.1.34-42

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Research was conducted on a banana cultivar of Rajabulu/AAB inside the green house. This research was aimed to study the effect of rhizobacteria and the ability of in vitro bacterization to prevent FOC. This study was conducted using split plot design. The main plot was rhizobacteria treatments (P. fluorescens ES-32, B. subtilis SB-3, a mix of both types and without bacteria), sub plots consist of in vitro (2 weeks and 1 week prior to application) and in vivo (during acclimatization) bacterization. All treatments were repeated 3 times, each consist of 7 polibags. The result of rhizobacteria treatment (B. subtilis SB3 or P. fluorecens ES32) was able to reduce the Disease Severity (Rhizome Discoloration) caused by Fusarium oxysporum f.sp cubense (FOC). The incorporation of mixed rhizobacteria provided significant effect suppressing the infestation of FOC. The application of mix bacteria was better than single treatment.Keywords: B. subtilis, P. fluorecens, rhizome discoloration, fusarial wilt, suppressing
PENGGUNAAN BENZIL AMINO PURIN (BAP) PADA OKULASI JERUK KEPROK (CITRUS RETICULATA) Sariningtias, Nur Wahyu; Poerwanto, Roedhy; Gunawan, Endang
Jurnal Hortikultura Indonesia Vol. 5 No. 3 (2014): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (243.707 KB) | DOI: 10.29244/jhi.5.3.158-167

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ABSTRACTMandarins (Citrus  reticulata)  is  one  of  the  important  fruit  commodity  in Indonesia. The problems  that  often  arise  in  the  development  is  the availability  of  healthy  seedlings  and  in  large numbers. The purpose of this research was to determine the effect of Benzyl Amino Purines (BAP) onthe success of budding and bud  growth  on the plant  mandarins  Borneo  Prima and  Garut  Dataran Rendah.  This  research  was  conducted  at  the  Pasir Kuda  Experimental  Farm,  Ciomas,  Bogor  in January  to  May  2013.  This experiment  was arranged in  a randomized complete block design with two factors of the scions varieties (Borneo Prima and Garut Dataran Rendah) and the concentration of  BAP  (0, 5, 10, and 15 ppm),  repeated 3  times  so there were 24  experimental units. The research data was analyzed statistically using F test at 5% and continued with DMRT test at 5%. The results showed that the application  of BAP  at  low concentration on  the scions  of the  two  varieties do  not give significantly different results in the variable of success of budding and growth of plant shoots.Keywords: bud, cytokinin, nutrition, rootstock, scion ABSTRAKJeruk  keprok  (Citrus  reticulata)  merupakan  salah  satu  komoditas  buah yang  penting  di Indonesia. Permasalahan yang sering muncul dalam pengembangan jeruk keprok adalah ketersediaan bibit  yang  sehat  dalam jumlah  banyak.  Tujuan  penelitian  ini  adalah  untuk  mengetahui pengaruh pemberian  Benzil  amino  purin  (BAP)  terhadap  keberhasilan okulasi  dan  pertumbuhan  tunas  pada tanaman  jeruk  keprok  Borneo  Prima dan  Garut  Dataran  Rendah.  Penelitian  ini  dilaksanakan  di Kebun Percobaan Pasir  Kuda,  Ciomas,  Bogor  pada  bulan  Januari  sampai  bulan  Mei  tahun 2013. Penelitian disusun dalam rancangan kelompok lengkap teracak (RKLT) faktorial dengan dua faktor yakni varietas batang atas (Borneo Prima dan Garut Dataran Rendah) dan konsentrasi BAP (0, 5, 10, 15 ppm),  diulang 3 kali sehingga terdapat 24 unit percobaan. Data hasil percobaan dianalisis secara statistika dengan uji F pada taraf nyata 5% dan dilanjutkan dengan uji lanjutan DMRT pada taraf nyata  5%  untuk  nilai  yang  berbeda  nyata.  Hasil penelitian  menunjukkan  bahwa  pemberian  BAP dengan konsentrasi rendah pada dua varietas batang atas jeruk keprok  tidak memberikan hasil yang berbeda nyata pada peubah keberhasilan okulasi dan pertumbuhan tunas tanaman.Kata kunci: batang atas, batang bawah, nutrisi, sitokinin, tunas
OPTIMASI PERTUMBUHAN VEGETATIF DAN KERAGAAN TANAMAN JERUK KEPROK BORNEO PRIMA (CITRUS RETICULATA CV. BORNEO PRIMA) MELALUI PEMANGKASAN DAN PEMUPUKAN Sri Rahayu, Resa; Poerwanto, Roedhy
Jurnal Hortikultura Indonesia Vol. 5 No. 2 (2014): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (316.591 KB) | DOI: 10.29244/jhi.5.2.95-103

Abstract

ABSTRACTMandarin citrus cv. Borneo Prima is superior local commodity  that needs to be expaned for reduction of citrus import. Development of the commodity needs to follow good agricultural practice to  optimize  growth.  The  objectives  of  this research  were  to  optimize  vegetative  growth  and  treearchitecture  of mandarin  citrus  cv.  Borneo  Prima  by  various  dosages  of  nitrogen fertilizer and pruning. This research used  Randomize Complete Block Design (RCBD) with two factors. The  first factor was various dosage of nitrogen fertilizer consisting  of four levels: 0 g (P0), 10 g (P1), 20 g (P2), and 30 g (P3). The second factor was pruning shape consisting  of three levels: no pruning (K1), open  center  pruning  (K2),  and  hedge  pruning  (K3).  The  results  showed that  dosages  of nitrogen  fertilizer  did  not  give  significant  effect  variables of  vegetative  growth  and  plant architecture  except  for  Leaf  Area  Index (LAI).  Pruning  had  significant  effect  to  variables  of vegetative growth and plant architecture. Hedge pruning and open center pruning were significantly different  from  no pruning treatment  on tree  architecture?s  by expanding  canopy surface to absorb sunlight. Interaction between nitrogen fertilizer dosages and pruning shapes were not significant.Keywords: canopy surface, hegde pruning, mandarin citrus cv. Borneo Prima, vegetatif growth ABSTRAKJeruk keprok Borneo Prima merupakan komoditas lokal unggulan yang perlu dikembangkan sebagai upaya untuk mengurangi impor jeruk. Pengembangan jeruk ini  harus memperhatikan teknik budi  daya  yang  baik  untuk mengoptimalkan  pertumbuhan.  Tujuan  penelitian  ini  adalah mengoptimalkan pertumbuhan vegetatif dan keragaan tanaman jeruk keprok Borneo Prima melalui berbagai  dosis  pupuk  nitrogen  dan  bentuk  pemangkasan.  Kegiatan penelitian  ini  menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) faktorial dengan dua faktor. Faktor pertama adalah dosis pupuk nitrogen yang terdiri  atas  empat taraf: 0 g (P0), 10 g (P1), 20 g (P2), dan 30 g (P3)pertanaman.  Faktor  kedua  adalah  bentuk  pemangkasan  yang  terdiri atas  tiga  taraf:  tanpa pemangkasan  (K1),  pangkas  terbuka  tengah  (K2), dan  pangkas  pagar  (K3).  Hasil  penelitian menunjukkan bahwa dosis pupuk nitrogen tidak memberikan pengaruh yang nyata terhadap peubahpeubah pertumbuhan  vegetatif  dan  keragaan  tanaman  kecuali  Indeks  Luas  Daun (ILD).  Bentuk pemangkasan memberikan pengaruh yang nyata terhadap peubah-peubah pertumbuhan vegetatif dan keragaan  tanaman.  Perlakuan pangkas  pagar  dan  pangkas  terbuka  tengah  berbeda  nyata dengan perlakuan  tanpa  pemangkasan  terhadap  bentuk  keragaan  tanaman dengan  memperluas  permukaan kanopi untuk menyerap cahaya matahari. Tidak ada interaksi antara dosis pupuk nitrogen dan bentuk pemangkasan.Kata kunci: jeruk keprok Borneo Prima, pangkas pagar, permukaan kanopi, pertumbuhan vegetatif, pangkas terbuka tengah
Co-Authors , Dorly , Lizawati , Sakhidin , Sobir , Sudarsono , Trikoesoemaningtyas , Yudiwanti . DARMAWAN . SUDARSONO . SUHARSONO ABDUL MUNIF Abdul Qadir Achmad Surkati AGUS PURWITO Ahmad Ghozi Manshuri Ahmad Ghozi Mansyuri Ahmad S. Abidin Akmal, Ajmir Ali Nurmansyah Anas D Susila Anas D. Susila Anas Dinurrohman Susila ANDRIA AGUSTA Ansyori, . Asmini Budiani Bambang S . Purwoko Bambang S. Purwoko Bambang Sapta Purwoko Cenra Intan Hartuti Tuharea CICIK SURIANI D Fatria Darda Efendi DEDY DURYADI DEWI SUKMA DIDY SOPANDIE Djoko Santoso DORLY DORLY E Efendi, E Edi Santosa Eko Setiawan Endah Retno Palupi Endang Gunawan Fahrianty, Dian Fauziyah Harahap Fumio Fukuda H., Nian Rimayanti HAJRIAL ASWIDINNOOR Hanifah Muthmainnah, Hanifah Heni Purnamawati Hiroshi Inoue I Hidayati, I I MADE ARTIKA I NYOMAN RAI Iman Rusmana Inanpi Hidayati Sumiasih, Inanpi Hidayati Indah Wulandari Iskandar Lubis Jawal Muhammad Anwarudinsyah Juanasri, Juanasri JULIARNI JULIARNI Jumawati, Riana Kasutjianingati . Ketty Suketi Kuniyuki Saitoh Kurniadinata, Odit F. Kurniawan, Vandra La Ode Safuan Latifah K. Darusman LATIFAH KOSIM DARUSMAN Lukman Liferdi Maulana, Mohamad Akhbar Maulana, Mohamad Akhbar Memen Surahman Muhammad Arif Nasution Muhammad Darmawan, Muhammad Nadhirah Karimatul Ilmi, Nadhirah Karimatul Naohiro Kubota Nobuo Sugiyama Nono Sutrisno Nur Wahyu Sariningtias, Nur Wahyu Nurfitri Ramadhani, Nurfitri Nurul Khumaida Odit Ferry Kurniadinata, Odit Ferry Rahmat Budiarto Ramdan Hidayat Rd. Selvy Handayani Resa Sri Rahayu, Resa S Susanto SAMANHUDI, . Septirosya, Tiara Slamet Susanto Soaloon Sinaga Sobir Sobir SOEKISMAN TJITROSEMITO Sri Astuti Rais Sri Yuliani SRIANI SUJIPRIHATI Suci Rahayu SUDIRMAN YAHYA SURYO WIYONO Sutrisno sutrisno T Purnama Tanari, Yulinda Taruna Shafa Arzam, Taruna Shafa Tetty Chaidamsari, Tetty Tiara, Dede Titin Purnama Tri Muji Ermayanti Widodo . Widya Sari Winarso D. Widodo Winarso D.Widodo, Winarso Winarso Dradjad Widodo Winarso Drajad Widodo Y A Purwanto, Y A Yunita, Roza Yunus, Ismadi