M. A. Chozin
Fakultas Pascasarjana, Institut Pertanian Bogor, Kampus IPB Darmaga, Bogor

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KEEFEKTIFAN KONSENTRASI DAN JENIS PELARUT TEPUNG UMBI TEKI (CYPERUS ROTUNDUS L.) SEBAGAI BIOHERBISIDA PRATUMBUH UNTUK PENGENDALIAN GULMA ASYSTASIA GANGETICA (L.) T. ANDERSON Chairannisa, Dyana; Chozin, M. A.
Buletin Agrohorti Vol. 6 No. 2 (2018): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (327.735 KB) | DOI: 10.29244/agrob.v6i2.18938

Abstract

Cyperus rotundus merupakan salah satu jenis gulma yang berpotensi untuk digunakan sebagai bioherbisida pratumbuh. Kandungan metabolit gulma teki Cyperus rotundus terbanyak terdapat pada bagian umbi. Penelitian ini bertujuan mengetahui keefektifan umbi teki (Cyperus rotundus) sebagai bioherbisida dalam menekan perkecambahan gulma Asystasia gangetica dan mengetahui jenis pelarut dan konsentrasi yang tepat dalam menekan perkecambahan biji gulma Asystasia gangetica. Penelitian ini dilaksanakan pada bulan Mei hingga November 2016. Penelitian ini terdiri dari 2 percobaan. Percobaan pertama merupakan pengujian ekstrak tepung umbi Cyperus rotundus terhadap perkecambahan gulma Asystasia gangetica dengan menggunakan metode uji di atas kertas. Percobaan kedua merupakan pengujian ekstrak tepung umbi teki Cyperus rotundus terhadap perkecambahan gulma Asystasia gangetica menggunakan media tanah. Percobaan pertama dan kedua menggunakan Rancangan Acak Lengkap Faktorial. Perlakuan terdiri jenis pelarut metanol dan aquades, dan konsentrasi 50 g L-1, 100 g L-1, 150 g L-1, 200 g L-1, 250 g L-1 dengan 3 ulangan. Hasil penelitian menunjukkan bahwa tepung umbi teki Cyperus rotundus mampu menekan perkecambahan gulma Asystasia gangetica pada media kertas. Hasil percobaan ini menunjukkan kecenderungan makin tinggi konsentrasi makin menekan perkecambahan gulma Asystasia gangetica pada media kertas. Kedua jenis pelarut menunjukkan keefektifan yang sama dalam menekan perkecambahan pada media kertas. Tepung umbi teki yang diberikan belum efektif dalam menekan perkecambahan gulma Asystasia gangetica pada media tanah.
PENGARUH REDUKSI PUPUK NPK SERTA APLIKASI PUPUK ORGANIK DAN HAYATI TERHADAP PERTUMBUHAN, PRODUKSI DAN MUTU HASIL PADI SAWAH (ORYZA SATIVA L.) Perwita, Atikah Dyah; Chozin, M. A.; Sugiyanta, .
Buletin Agrohorti Vol. 5 No. 3 (2017): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (70.824 KB) | DOI: 10.29244/agrob.v5i3.16577

Abstract

Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pengurangan dan penerapan pupuk NPK dan pupuk bio-organik terhadap pertumbuhan, produksi dan kualitas hasil padi. Penelitian dilakukan di Karawang, Jawa Barat pada bulan Oktober 2010 sampai April 2011. Varietas padi yang digunakan adalah Ciherang. Rancangan percobaan yang digunakan Kelompok Lengkap terdiri dari 13 perlakuan. Perlakuan terdiri dari: P1 = jerami + ½ dosis NPK, P2 = jerami + ½ dosis NPK + Pupuk Granule Organik + Pupuk Organik Cair, P3 = jerami + ½ dosis pupuk NPK + Granule Pupuk Organik, P4 = jerami + ½ dosis NPK + Granule Pupuk Organik + Biofertilizer 1, P5 = jerami + ¾ dosis NPK + biofertilizer 2, P6 = jerami + ½ dosis NPK + kotoran, P7 = jerami + ½ dosis NPK + biofertilizer 1, P8 = jerami + ½ dosis NPK + biofertilizer 2, P9 = sedotan + 1 dosis NPK, P10 = 1 dosis NPK, P11 = jerami + ½ dosis NPK + biofertilizer 3, P12 = ½ dosis NPK + biofertilizer 3, P13 = tanpa pupuk. Pengamatan meliputi komponen pertumbuhan vegetatif, panen dan kualitas beras. Aplikasi kombinasi pupuk memiliki pengaruh yang nyata terhadap jumlah anak anjing, berat butir per bukit, dan tingkat butir kotor. Hasil penelitian menunjukkan bahwa penerapan pupuk organik dan pupuk hayati dapat mengurangi penggunaan NPK tanpa mengurangi produksi. Hasil biji tidak berbeda nyata di antara semua perlakuan.
STUDI SERAPAN HARA N, P, K DAN POTENSI HASIL LIMA VARIETAS PADI SAWAH (ORYZA SATIVA L.) PADA PEMUPUKAN ANORGANIK DAN ORGANIK Sugiyanta, ,; Rumawas, Fred; Chozin, M. A.; Mugnisyah, Wahju Qamara; Ghulamahdi, Munif
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 36 No. 3 (2008): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (54.9 KB) | DOI: 10.24831/jai.v36i3.1377

Abstract

The objective of the research was to study the nutrition uptake (nitrogen, phosphorus, and potassium,) and the grain production of five rice varieties representing modern, new plant type and local varieties under application of inorganic, organic and combined inorganic-organic fertilization. Five rice varieties were Way Apoburu and IR-64 (modern varieties), Midun and Sarinah (local varieties from Sukabumi and Garut, respectively), and Fatmawati (new plant type variety).  Five fertilizer treatments were (1) full recommendation dosage of inorganic fertilizer (250 kg urea/ha, 100 kg SP-36/ha, and 100 kg KCl/ha), (2) ¼ recommendation dose of inorganic fertilizer + rice straw, (3) ½ recommended dose of inorganic fertilizer + rice straw, (4) rice straw, and (5) green manure from Crotalaria juncea biomass. The results showed that there was no specific response of rice varieties to the fertilization treatments, even though there was specific nutrient uptake pattern and yield of each variety, and there was significant effect of fertilizer treatment to nutrient uptake and rice yield. Nutrient uptake and grain yield indicated that nutrient imobilisation occurred at 1stseason, however the availability of N, P, K nutrients increased at 2nd and 3rdseason on rice straw and green manure treatments. Rice straw application caused lower nutrient uptake and grain yield than full dosage inorganic fertilizer at 1st season but both were not significantly different at 2nd and 3rdseason.  Application of rice straw with  ½ dosage of inorganic fertilizers was not significantly different from full dosage of inorganic fertilizers in nutrient uptake and grain yield. Modern varieties showed higher level of N absorption than that of new  type variety although it was not significantly different with that of local varieties, whereas the P and K uptake of modern varieties was lower than that of local and new plant type varieties. The modern varieties also showed higher level of dry grain per hill than that of local and new plant type varieties. However yield per ha of all varieties tended to be similar.   Key words: uptake, efficiency, mineral nutrition, variety, lowland rice
PENGARUH PENGGUNAAN PUPUK ANORGANIK DAN PUPUK SEMAI MIKROBIA TERHADAP PERTUMBUHAN DAN PRODUKSI KAPAS (GOSSYPIUM HIRSUTUM L.) Guntoro, Dwi; Chozin, M. A.; Dwirestina, Dini
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 32 No. 1 (2004): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (624.459 KB) | DOI: 10.24831/jai.v32i1.1430

Abstract

effect of inorganic fertilizer dosage and concentration of Semai Mikrobia fertilizer on cotton growth and production was studied at Cikabayan greenhouse, IPR. The experiment was arranged in split plot design with three replicates. The dosages of inorganic fertilizers as the main plot and the concentration of Semai Mikrobia as sub plot. The dosages of inorganic fertilizers were no fertilizer, 50% recommended dosage, and IOO% recommended dosage and the concentrations of Semai Mikrobia were 0 cc/l water, 4 cc/l water, 8 cc/l water, and I2 cc/l water. The results indicated that the application of Semai Mikrobia fertilizer up to I2 cc/l did not affect growth and production of cotton. There was no interaction effect between the dosage of inorganic fertilizer and Semai Mikrobia concentration. Inorganic fertilizer application at IOO% recommended dosage increased height and the number of generative branch compared with no fertilizer.
UJI POTENSI HASIL BEBERAPA GALUR PADI GOGO Sulistyono, Eko; Chozin, M. A.; Rezkiyanti, Femila
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 30 No. 1 (2002): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (316.844 KB) | DOI: 10.24831/jai.v30i1.1421

Abstract

Artificial shading experiment was conducted to test upland rice lines yield potential and study agronomic character correlated with high yield. A factorial experiment was arranged in split plot design with three replications. The main plot were three levels of shading: 0%, 25% and 50%. The sub-plot were 18 upland rice lines. Dry grain weight was affected by interaction between shading and lines. High yield was resulted by B8503E-TB-19B-3-4, .S'3605F-PN-201, IGM440, and 2GM440. Agronomic characters correlated with high yield potential at low light intensity were high plant, high leaf area, low tiller number, high shoot and root dry weight, high grain density and low unfilled grain percentage. Key words: Agronomic character, Grain density, Root weight, Low light intensity.
PENGGUNAAN KACANG HIAS (ARACHIS PINTOI) SEBAGAI BIOMULSA PADA BUDIDAYA TANAMAN TOMAT (LYCOPERSICON ESCULENTUM M.) Chozin, M. A.; G. Kartika, uang; Baharudin, Raisa
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 (214.745 KB) | DOI: 10.29244/jhi.5.3.168-174

Abstract

ABSTRACTThe objective of this study was to  determine the effect of  Arachis  pintoi planting  as bio-mulch on growth and yield of tomato and weed growth.  An experiment was conducted at Cikabayan, University Farm of IPB, from January to June 2010. The research was arranged  in a  randomized Complete Block Design with 3 replications. The results of this study showed  the g rowth and speed of coverage of  A. pintoi  in this experiment was relatively slow. The use of mulch improved the growth, yield components and production of tomatoes.  The best mulch was a plastic mulch.  The best planting period of A. pintoi as bio-mulch was 7 and 10 weeks before planting.Key words: bio- mulch, growth, silver black plastic mulch, yield ABSTRAKPenelitian  ini  bertujuan  untuk  mengetahui  pengaruh  penanaman  Arachis pintoi  sebagai  biomulsa dalam  menghambat  pertumbuhan  gulma  dan meningkatkan  pertumbuhan  dan  produksi  tanaman  tomat. Penelitian dilaksanakan di kebun percobaan Cikabayan- UF IPB, Darmaga Bogor dari Januari sampai Juni 2010.  Percobaan  menggunakan  Rancangan  Kelompok Lengkap  Teracak  (RKLT)  faktor  tunggal,  yaitu dengan  4  perlakuan  waktu tanam  A.  pintoi  dan  2  pembanding:  M0  (m onokultur  tanaman  tomat tanpa mulsa),  M1  (monukultur  tanaman  tomat  dengan  mulsa  plastik hitam perak),  M 2  ( 10  minggu  A.  pintoisebelum  tomat ditanam), M3 (7 minggu A. pintoi sebelum tomat ditanam), M4 ( 4 minggu A. pintoi sebelumtomat ditanam), dan M5 ( 1 minggu A. pintoi sebelum tomat ditanam ). Hasil percobaan menunjukkan bahwa persentase tumbuh dan kecepatan penutupan A. pintoi  relatif lambat. Tanaman tomat yang ditanam dengan biomulsa  A. pintoi 10 dan 7 minggu sebelum tanam menunjukkan persentase tumbuh dan pertumbuhan yang lebih baik dibandingkan perlakuan mulsa plastik hitam perak (MPHP)  maupun perlakuan tanpa mulsa. Perlakuan biomulsa A. pintoi 10 dan 7 minggu sebelum tanam (MSbT) serta perlakuan mulsa plastik hitam perak (MPHP) meningkatkan komponen pertumbuhan dan produksi buah tomat.Kata kunci: biomulsa, pertumbuhan, mulsa plastik hitam perak, produksi
PEMANFAATAN RESIDU BIOMULSA ARACHIS PINTOI DAN LEGUM LAINNYA PADA POLA TANAM ROTASI JAGUNG-TOMAT Munawir, Fathurrahman Aziz; Chozin, M. A.
Buletin Agrohorti Vol. 3 No. 1 (2015): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (327.312 KB) | DOI: 10.29244/agrob.v3i1.15180

Abstract

Tujuan dari penelitian ini adalah untuk membandingkan pengaruh residu biomulsa Arachis pintoi dengan residu biomulsa lainnya pada budidaya tanaman tomat dengan pola tanam rotasi jagung-tomat. Percobaan ini dilaksanakan di Kebun Percobaan Cikabayan, Dramaga, Bogor pada bulan November 2014 sampai April 2015. Percobaan ini menggunakan rancangan kelompok lengkap teracak (RKLT) satu faktor yaitu residu jenis biomulsa dengan 6 taraf perlakuan dan 3 ulangan pada tanaman tomat varietas Permata F1. Hasil penelitian menunjukkan bahwa residu biomulsa meningkatkan status hara tanah, diameter batang, komponen hasil, produksi tomat, dan mempengaruhi pergeseran jenis gulma. Secara umum residu biomulsa Arachis pintoi dapat meningkatkan status hara tanah dan produksi tomat yang cenderung lebih baik daripada residubiomulsa legum lainnya.
PENGARUH KONSENTRASI DAN SELANG WAKTU PEMBERIAN EFFECTIVE MICROORGANISMS 4 (EM-4) TERHADAP PERTUMBUHAN DAN HASIL TANAMAN KAPAS (GOSSYPIUM HIRSUTUM L.) Arsyid, Moh. Amri; Chozin, M. A.; Zaman, Sofyan
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 26 No. 1 (1998): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1641.035 KB) | DOI: 10.24831/jai.v26i1.1592

Abstract

The objective of this experiment is to study the effect of concentration and application interval of EM4 on growth and yield of cotton. The experiment was held in KP Sindangbarang Bogor from March to August 1996, using RCD with two factors and three replications. The first factor was EM4 concentration which were 0 ml L-1  water, 5 ml L-1  water, 10 ml L-1  water, 15 ml L-1  water, and 20 ml L-1  water. The second factor was application interval which were 5, 10, and 15 days. The result shows that the concentration of 5 ml L-1  water significantly affected the vegetative growth. But in the contrary, application interval and its interaction do not give the similar effect. The generative growth were significantly affected by concentration and application interval and its interaction. The best combination for maximum cotton yield is in concentration of 5 ml L-1 water and application interval 10 days, and for maximum seeded cotton yield is 5 ml L-1 water and 15 days.
OPTIMALISASI KEBERLANJUTANPENGEMBANGAN USAHA PADI ORGANIK DI KABUPATEN CIANJUR, JAWA BARAT Ristianingrum, Anita; Chozin, M. A.; Machfud, Machfud; Sugiyanta, Sugiyanta; Mulatsih, Sri
Jurnal Manajemen & Agribisnis Vol. 13 No. 1 (2016): Vol. 13 No. 1, Maret 2016
Publisher : School of Business, Bogor Agricultural University (SB-IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1240.666 KB) | DOI: 10.17358/jma.13.1.37

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The purpose of this study were to assess the sustainability status of organic rice businesses and their attributes that affect the sustainability of the businesses in Cianjur. The methods used in this study were surveys and in-depth interviews. Moreover, Rap-Organic/multi-dimensional scaling as the analysis tools were also utilized to assess the sustainability of the organic rice businesses. The analysis conducted indicates that sustainability status of organic rice businesses in Cianjur is less sustainable reflected in all dimensions i.e. the dimensions of ecology, economy, social, infrastructure and technology, as well as institutions. Aggregately, the sensitive attributes influencing the sustainability of organic rice business bussinesses can be classified into three factors: 1) human resources of farmers, 2) institutions (the government policies related to the organic rice businesses and infrastructure support), and 3) organic rice market.Keywords: organic rice businesses, sustainability, sensitive attributes, Rap-Organic
PEMANFAATAN CENDAWAN MIKORIZA ARBUSKULA DAN BAKTERI AZOSPIRILLUM SP. UNTUK MENINGKATKAN EFISIENSI PEMUPUKAN PADA TURFGRASS Guntoro, Dwi; Chozin, M. A.; Tjahjono, Budi; Mansur, Irdika
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 34 No. 1 (2006): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (81.105 KB) | DOI: 10.24831/jai.v34i1.1277

Abstract

Introduction turfgrass varieties require fertilization with high dosage, but it can contaminate environment.  The increasing  efficiency of fertilizer absorbtion was expected to reduce fertilizer requirement.  The experiment was conducted to study the effect of arbuscular mycorrhizae and Azospirillum sp. on nutrient uptake, fertilization efficiency, growth and visual quality of turfgrass.  The experiment consisted of two factors, i.e. the dosages of fertilizer and inoculant types.  The dosages of fertilizer were the relatif dosage from recommended dosage (RD) i.e 100%RD, 75%RD, 50%RD, and 25%RD.  The recommended dosage was 0.5 kg N + 1.5 kg P2O5 + 0.5 kg K2O per 100 m2/month by compound fertilizer (15-15-15).  The treatment of 100%RD without inoculant was used as control.  The inoculant types were no inoculant, arbuscular mycorrhizal fungi (AMF), Azospirillum sp., and AMF+Azospirillum sp.  Factorial experiment was arranged in Randomized Block Design with three replications.  The results showed that interaction between inoculant type and dosage of fertilizer affected nutrient uptake, fertilizer efficiency, growth, and visual quality.  AMF inoculation and 25%RD increased shoot N uptake and N fertilizer efficiency, compared with control.  Azospirillum sp. inoculation at 75% RD increased shoot N concentration, but did not affect on shoot N uptake and N fertilizer efficiency compared with control.  Inoculant did not affect shoot P concentration, shoot P uptake, and P fertilizer efficiency.  Azospirillum and AMF+Azospirillum inoculation increased shoot K concentration.  AMF+Azospirillum inoculation and 100%RD increased shoot N concentration and shoot N uptake, compared with control.    Key words : Arbuscular mycorrhizal fungi, Azospirillum, fertilizer efficiency, nutrient uptake, turfgrass.