Wiwik Hartatik
Balai Penelitian Tanah Jl. Tentara Pelajar 12, Bogor 16114

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PERTUMBUHAN TITHONIA DIVERSIFOLIA DENGAN DOSIS PUPUK KANDANG DAN JARAK TANAM YANG BERBEDA Desyrakhmawati, Lia; Melati, Maya; ,, Suwarto; Hartatik, Wiwik
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 43 No. 1 (2015): 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 (645.092 KB) | DOI: 10.24831/jai.v43i1.9595

Abstract

Mexican sunflower (Tithonia diversifolia) is a invansive weed but it can be used as continuous and on-farm source of nutrient for organic farming system. The objective of this study was to investigate growth and biomass production of T. diversifolia with different rates of chicken manure and plant spacings. The experiment was conducted at Cikarawang, Bogor, on Inceptisol soil type, from October 2011 until January 2012. The experiment was arranged in a randomized block design with 2 factors and 3 replications. The rates of chicken manure were  0, 2.5, 5 and 10 ton ha-1, while the plant spacings were 50 cm x 50 cm and 75 cm x 75 cm. The interaction effect between manure rates and plant spacing was significant on nett assimilation rate at 4-8 weeks after planting, but it was not significant on biomass production. The highest dry weight of biomass (1,129.1 kg ha-1) was obtained from the addition of 10 ton chicken manure ha-1 with the potential contribution as much as 55.47 kg N, 4.54 kg P, 88.54 kg K per hectare. The highest dry weight of biomass produced with planting distance 50 cm x 50 cm (897 kg ha-1). Referring to the results, it can be recommended that the cultivation of T. diversifolia at the first planting needs 10 ton chicken manure ha-1 and the planting distance of 50 cm x 50 cm.Keywords: biomass production, Mexican sun flower, nett assimilation ratio, nutrient contributio, weed
COMPOSITION OF PHOSPHORUS FRACTION ON PEAT ADDED WITH MINERAL SOIL AMELIORANT AND P FERTILIZATION HARTATIK, WIWIK; IDRIS, K.; SABIHAM, SUPIYANDI; DJUNIWATI, S.; ADININGSIH, J. SRI
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 21 (2003): Desember 2003
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n21.2003.%p

Abstract

Most of P on peat is in the form of organic P. Composition of P on peat, especially organic P, is rarely studied. Therefore fractionation of P on peat is important to know the proportion of inorganic and organic P and available P. The aim of the experiment was to study the composition of P added with mineral soil ameliorant and P fertilization. The experiment was conducted in the laboratory of the Indonesian Center for Soil and Agroclimate Research and Development, Bogor. Two hundreds g peat dry weight (105o) added with mineral soil ameliorant in the rate of 7.5% maximum Fe sorption which is equal to 10.4 g pot-1. The mixture of peat and mineral soil (Oxisols) was then added with P fertilizer and followed by incubation for 4 weeks. After incubation, the mixture was fractioned for P. P treatment consisting of four P fertilizer sources that are Maroko rockphosphate, Christmas rock phosphate, Ciamis rock phosphate and SP-36. Four P levels are 25, 50, 75, and 100% of P sorption plus partial complete control, and replicated two times. Composition of P in this study that is readily labile, moderately labile, and non labile. P fraction determinated with sequential extraction based on the method had been used by Ivanoff. The results showed that peat from Air Sugihan Kiri, South Sumatrawas poor (oligotropyc), acidic, and low exchangeable K and ash content. Most of P on the peat was in the proportion of organic P (around 77 up to 95%) and the rest was in a small amount, inorganic P (10 up to 23%). The composition of P organic fraction showed that the non labile was relatively the same P proportion with moderately labile, meanwhile the readily labile was low. Source and rock phosphate level did not affect theproportion of organic P. The application of Maroko and Ciamis rock phosphates at the level of 100% of P sorption increased available P (readily P inorganic). Non-labile inorganic P proportion from Christmas rock phosphate was higher than those from Maroko and Ciamis.
APLIKASI BIOCHAR DAN TITHOGANIC DALAM PENINGKATAN PRODUKTIVITAS KEDELAI (GLYCINE MAX L.) PADA TYPIC KANHAPLUDULTS DI LAMPUNG TIMUR Hartatik, Wiwik; Wibowo, Heri; Purwani, Jati
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 39, No 1 (2015)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v39n1.2015.51-62

Abstract

Abstrak. Ameliorasi dan pemupukan diperlukan untuk mendukung produksi kedelai yang optimal pada Ultisol. Penelitian bertujuan mengetahui pengaruh Biochar, Tithoganic, dan Bionutrient terhadap sifat kimia, fisika dan biologi Typic Kanhapludults dan produktivitas kedelai. Penelitian dilaksanakan pada bulan Juni- September (musim kemarau) 2013, di Desa Taman Bogo, Kabupaten Lampung Timur. Tanaman indikator yang digunakan kedelai, dengan jarak tanam 15 x 40 cm. Percobaan menggunakan Rancangan Petak Terpis ah (split plot), empat ulangan. Petak utama: A1 = Kontrol, A2 = Dolomit (515 kg ha-1) dan A3 = Biochar (2,5 t ha-1). Anak petak: B1 = Tithoganic 2 t ha-1, B2 = Tithoganic 2 t ha-1 + Bionutrient dan B3 = mulsa jerami 2 t ha-1. Dosis pupuk dasar Urea, SP-36, dan KCl berturut-turut 50, 100 dan 150 kg ha-1. Pada saat kedelai berumur 50 hari setelah tanam diamati sifat kimia, fisika dan biologi tanah. Pengamatan agronomis termasuk pertumbuhan tanaman, jumlah dan berat bintil akar, hasil tanaman dan serapan N, P dan K. Hasil penelitian menunjukkan bahwa Biochar nyata meningkatkan K potensial, tetapi tidak nyata berpengaruh terhadap sifat fisika tanah. Dolomit berpengaruh nyata meningkatkan pH dan aktivitas mikroba serta menurunkan Al-dd tanah. Tithoganic nyata meningkatkan kadar C-organik, Ca-dd, Mg-dd, dan aktivitas mikroba. Perlakuan Tithoganic + Bionutrient nyata meningkatkan Ca-dd dan kejenuhan basa dibandingkan aplikasi mulsa jerami. Ameliorasi Biochar 2,5 t ha-1 memberikan pengaruh yang tidak berbeda nyata dengan Dolomit 515 kg ha-1 terhadap bobot biji kering kedelai. Biochar yang dikombinasikan dengan pemberian Tithoganic atau Tithoganic + Bionutrient memberikan bobot biji kering kedelai lebih tinggi berturut-turut sebesar 2,28 dan 2,42 t ha-1, terjadi peningkatan bobot biji kering kedelai berturut-turut sekitar 19 dan 26% dibandingkan aplikasi mulsa jerami 2 t ha-1. Biochar nyata meningkatkan serapan P dan K dan Tithoganic nyata meningkatkan serapan N, P dan K tanaman kedelai dibandingkan dengan aplikasi mulsa jerami. Peningkatan produktivitas tanah dan tanaman kedelai pada Typic Kanhapludults, Lampung Timur memerlukan amelioran Dolomit atau Biochar yang dikombinasikan dengan Tithoganic dengan dosis seperti diuji pada penelitian ini. Abstract. Amelioration and fertilization are needed to support optimum soybean production on Ultisols. This study aims to determine the effects of Biochar, Tithoganic and Bionutrient on the chemical, physical and biological properties of Typic Kanhapludults and productivity of soybean in Lampung Timur. The experiment was conducted in Juni ? September in the 2013 dry season in Taman Bogo Village, Lampung Timur. Indicator plant was soybean of Anjasmoro variety, with plant spacing of 15 cm x 40 cm. The experimental design was Split Plot, with four replication. As the main plots were A1 = Control, A2 = 515 kg ha-1 Dolomite, and A3 = 2.5 t ha-1 Biochar. The subplots were B1 = 2 t ha-1 Tithoganic, B2 = 2 t ha-1 Tithoganic + Bionutrient, B3 = 2 t ha-1 straw mulch. The rates of fertilizers Urea was 50 kg ha-1, SP-36 was 100 kg ha-1 and 150 was kg KCl ha-1. At 50 days after planting, we observed soil physical, chemical and biological properties. Agronomic observations included soybean growth, number and dry weight of nodule, yield and nutrient uptake of N, P and K. The results showed that Biochar significantly increased potential K concentration, but did not improve soil physical properties. Dolomite significantly increased soil pH, microbial activity and decreased exchangeable Al. Tithoganic treatment significantly increased organic C, exchangeable Ca and Mg and microbial activity. Tithoganic + Bionutrient treatment significantly increased the exchangable Ca and base saturation compared to straw mulch application. Biochar 2.5 t ha-1 did not have significantly different grain dry weight of soybean compared to 515 kg ha-1 Dolomite. Combination of Biochar and Tithoganic or Tithoganic + Bionutrient gave the highest grain dry weight of soybean of 2.28 and 2.42 t ha-1, respectively. Increase of grain dry weight of soybean was about 19 and 26%, respectively compared to 2 t ha-1 from straw mulch application. The Biochar significantly increased P and K uptakes and Tithoganic significantly increased the uptakes of N, P and K by soybean compared to straw mulch application. Dolomite or Biochar in combination with Tithoganic at the tested rate of this experiment improved soybean productivity of Typic Kanhapludults in Lampung Timur.
The Effects of Inorganic Fertilizer and Mineral Leucite Residues on K Uptake and Maize Yields (Zea mays L.) in Oxisols Hartati, Sri; Minardi, Slamet; Hartatik, Wiwik; Haniati, Isna Luthfa
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 15, No 2 (2018): December
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15608/stjssa.v15i2.18604

Abstract

The purpose of this study was to determine the effect of inorganic fertilizer and leucite mineral residues on K uptake and maize yields. This research had been conducted from October 2016 to September 2017 in the experimental field of Neglasari, Dramaga, Bogor. The soil was analyzed in the Soil Chemistry and Fertility Laboratory of Sebelas Maret University, Surakarta. The study was arranged in a completely randomized block design using 11 treatments with three replications. The result showed that the NPK 150 kg ha-1 residues gave a better effect on corn yields whereas there was no significant effect of employing the standard NPK with RAE value of 123%. The study found that the residual treatment of inorganic fertilizers and leucite minerals had a significant impact on maize yields but not on K uptake.
FORMULASI DAN POLA KELARUTAN N PUPUK UREA-ZEOLIT LEPAS LAMBAT Hartatik, Wiwik; Mardliyati, Eti; Wibowo, Heri; Sukarto, Agus; Yusron, Yusron
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 44, No 1 (2020)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v44n1.2020.61-70

Abstract

Abstrak. Upaya pengendalian pelepasan Urea secara perlahan dapat dilakukan dengan memformulasi pupuk Urea dengan Zeolit dan penyalutan Kitosan sehingga dapat menyediakan hara N secara lambat, dan meningkatkan efisiensi pemupukan, produktivitas tanah dan tanaman. Tujuan penelitian ini adalah memformulasi dan mempelajari kelarutan N dari formula pupuk Urea dan Zeolit yang berukuran submikron dan yang disalut dengan Kitosan. Penelitian dilaksanakan di Laboratorium dengan rancangan percobaan Rancangan Acak Lengkap dengan 3 ulangan. Perlakuan yang dicobakan adalah 1) Kontrol lengkap (tanpa pupuk), 2) Urea prill (pupuk standar), 3) Formula Urea + Zeolit, dan 4) Formula Urea + Zeolit + Kitosan. Pengamatan yang dilakukan yaitu kelarutan N-total, N-NH4 dan N-NO3 selama inkubasi 2, 4, 6, 8, 10, dan 12 minggu. Hasil penelitian menunjukkan bahwa formula pupuk Urea + Zeolit dengan perbandingan 3:2 yang disalut Kitosan memberikan kelarutan N-total sebesar 25,43% pada inkubasi 12 minggu dibandingkan Urea prill sebesar 43,43%. Selama inkubasi perlakuan kontrol memberikan kelarutan N-total paling rendah, karena kadar N tanah awal rendah. Formula pupuk Urea + Zeolit yang disalut Kitosan dapat meningkatkan efisiensi pemupukan melalui kelarutan N yang slow release sehingga mampu mengurangi penguapan dan pencucian pupuk Urea. Abstract. The efforts to slow down Urea release can be conducted by formulating of Urea and Zeolit, and followed by chitosan encapsulation. The formulation can release Nitrogen (N), increase the efficiency of fertilization, and increase soil and crop productivity. This research was aimed to formulate and evaluate the solubility of N from Urea and submicron-sized Zeolit followed by coating with chitosan. The experiment was conducted from April to December 2012 at the Laboratory with experimental design of completely randomized design with three replications. The treatments tested were 1) Complete control, 2) Prilled Urea, 3) Formula of Urea + Zeolit, and 4) Formula of Urea + Zeolit + chitosan. Observations included solubilities of total N, NH4-N, and NO3-N during the incubation of 2, 4, 6, 8, 10, and 12 weeks. The results showed that the formula of Urea + Zeolit fertilizer with the ratio of 3:2, encapsulated with chitosan gave a total N-solubility of 25.43% at 12 weeks incubation, which was significantly lower than that of prilled Urea of 43.43%. During the incubation, the control treatment gave the lowest total N-solubility, because of the low initial N soil content. The formula of Urea + Zeolit coated with chitosan can increase fertilizer efficiency through slow release N solubility so as to reduce volatilization and leaching of Urea fertilizer.
PENGEMBANGAN PUPUK CAIR NITROGEN BERUKURAN NANOMETER UNTUK MENINGKATKAN EFISIENSI PEMUPUKAN Saprudin, Deden; Gulamahdi, Munif; Hartatik, Wiwik; Darusman, Latifah Kosim; Nuraisyah, Ilfa
Jurnal Ilmu Pertanian Indonesia Vol. 17 No. 2 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (167.569 KB)

Abstract

Conventional utilization of urea just has absorbed 30-60%. Remaining, 40-70% lost to environment, give not economic benefit and serious problem in environment. The use of less efficient urea has received attention lately. One way to overcome the problem of inefficiency of urea fertilizer use is a nano-sized fertilizer. Synthesized nanofertilizer in this study were nanomagnetit (Fe3O4). Nanomagnetit synthesized from FeCl3 as a source of iron, sodium citrate as the reductant, and urea as a source base. Nanomagnetite synthesized using a hydrothermal method. Based on the results of X-ray diffraction, the nanomagnetit has average crystal size 46.66 nm and crystal structure is Face Center Cubic. Energy-dispersive X-ray spectroscopy shows constituent elements in nanomagnetite are iron (29.45%), oxygen (53.07%), carbon (14.86%), and sodium (2.62%). This shows the iron and oxygen is the main constituent elements nanomagnetite. In the process of magnetite formation absorbed urea by 30% with N content (0.14%) and most are in the liquid synthesis (0.82%) so that it can be used as fertilizer on crops. Based on this research, variations of pH (6-8) liquid fertilizer provided no significant effect. The addition of 0.15 g nanomagnetite have better growth among other treatments.