Hery Widijanto
Soil Science Department, Faculty of Agriculture, University of Sebelas Maret, Surakarta
Articles
25
Documents
KAJIAN MACAM PUPUK ORGANIK DAN DOSIS PUPUK P TERHADAP HASIL KACANG TANAH (Arachis hypogaea L.) Dl TANAH ENTISOL

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 1, No 1 (2001)
Publisher : Faculty of Agriculture, Sebelas Maret University

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Abstract

The aim of the study was to know the affect of organic fertilizer kind and dosage of P fertilizer to yield of peanut(Arachis hypogxa L) on entisol. The research was carried out at Colomadu, Karanganyar from September 1999 to January 2000. The field research design was factorial arranged in Completely Randomized Block Design, consist of two factors : organic Fertilizer and Dosage ofP fertiilizer. The first factor was kind of organic fertilizer: bokhasi (O1), animal manure (O,) and fine compost (O3). The second factor was dosage of P fertilizer consist of four doses: without P fertilizer (P0), 50 kg SP-36 /ha (P1), 100 kg SP-36 /ha (P2) and 150 kg SP-36 /ha (P3). The study indicated that the kind of organic fertilizer non significant to soil pH, available Pemegang, height of plant, total of fill pod, total of empty pod, weight of fresh pod of plant and weight of 100 seeds and significant to fresh weight of plant, weight of fresh pod of plot, weight of dry pods of plot and weight of seed of plant. Bokhasi indicated better affect than animal manure and fine compost. P fertilizer incraesed weight fresh pod of plot and weight of dry of plot.

EFISIENSI SERAPAN S DAN HASIL PADI DENGAN PEMBERIAN PUPUK KANDANG PUYUH DAN PUPUK ANORGANIK DI LAHAN SAWAH (MUSIM TANAM II)

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 8, No 1 (2011)
Publisher : Faculty of Agriculture, Sebelas Maret University

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The aim of this research was to know the effect of inorganic fertilizer quail manure to efficiency of Sulphur up take and to know treatment combination that give highest rice yield. This research had been done at Palur, Mojolaban, Sukoharjo, started from January until August 2008. This research used factorial experiment that arranged in Randomized Complete Block Design (RCBD) with two factors. The first factor was 3 levels of inorganic fertilizer dosage i.e.: without inorganic fertilizer, 50% recommendation dosage and 100% recommendation dosage (urea, ZA, SP‐36 and KCl were 300, 100, 150 and 100 kg. ha‐1). And second factor was 3 levels of quail manure dosage i.e.:0, 3 and 6 ton.ha‐1. Statistical analysis used F test, Duncan’s Multiple Range (DMR) test at 5% in level and Correlation test. The Result of this research showed that, interaction between inorganic and quail manure increased significantly efficiency of S uptake. Dosage quail manure increased significantly total weight of dry hust. The highest efficiency of S uptake was on 100% recommendation dosage inorganic fertilizer and quail manure dosage 3 ton.ha‐1 (44.12%). The highest total weight of dry hust on 50% recommendation dosage inorganic fertilizer and quail manure dosage 6 ton.ha‐1 Key words: quail manure, efficiency of S uptake and paddy soil

Pengeloloan Kesuburan Pada Tanah yang Dipersawahkan dengan Sistem Pertanian Organik

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 4, No 1 (2004)
Publisher : Faculty of Agriculture, Sebelas Maret University

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EFISIENSI SERAPAN P TANAMAN KENTANG PADA TANAH ANDISOL DENGAN PENAMBAHAN VERMIKOMPOS

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 5, No 2 (2008)
Publisher : Faculty of Agriculture, Sebelas Maret University

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Mostly potatoes (Solanum tuberosum L.) are planted on Andisols that have problem in phosphate fixation. The aim of this research were to know the efficiency of P fertilizing in Andisols that were added vermicompost and SP36 and to know potatoes yield in Andisol. This research was conducted at Tawangmangu, Karanganyar on October until December 2007. The method used was split plot design, as a main plot was vermicompost, i.e. no vermicompost and 10 ton.ha-1 vermicompost. Sub plot consist of four levels of P fertilizer (SP36), i.e. 100, 250, 400, 550 kg.ha-1 and control. The observation variables are available P, efficiency of P absorption, weight and diameter percentage of potato tuber. F test, Kruskal-Wallis test, and DMRT 5% test is used to analysis data. The result of this research shows that there is interaction betwen vermicompost and 400 kg.ha-1 doses SP36 to highest available P in the soil is 2.157 ppm P2O5, but there is no interaction on yield. The addition of 10 ton.ha-1 vermicompost can increase weight of potato tuber (30.83 %) and decreased percentage of potato tuber amount diameter in < 9 cm (48.05 %). Addition of 250 kg.ha-1 SP36 can increase percentage of potato tuber amount diameter in 12-15 cm (57.46%). The highest result of potato is reached on tuber diameter > 15 cm (37.16%) with 10 tons.ha-1 vermicompost additions. Keywords: vermicompost, P fertilizer, potato, Andisols

STUDI KUALITAS AIR DAN SUMBANGAN HARA DARI IRIGASI SIDEREJO-JAWA TENGAH PADA BUDIDAYA PADI SAWAH

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 1, No 2 (2002)
Publisher : Fakultas Pertanian Universitas Sebelas Maret

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INOKULASI JAMUR PENGOKSIDASI BELERANG PADA PUPUK FOSFAT ALAM UNTUK MENINGKATKAN FOSFAT DAN SULFAT TERSEDIA BAGI TANAMAN

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 5, No 2 (2008)
Publisher : Faculty of Agriculture, Sebelas Maret University

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Phosphate rocks as an alternative sources of P fertilizer are cheaper than SP-36. The main problem was their low of total and available P that must be increased to make them more effective source of P for plants. Inoculate them with S oxidizing fungi will increase their available-P. The research aim was to study the potency of two S oxidizing fungi Aspergillus japonicus and Penicillium nalgiovensis to increase available-P of phosphate rocks. Experimental research done at the Lab. of Soil Biology and Lab. of Soil Chemistry and Fertility, Department of Soil Science, Faculty of Agriculture, UNS, Surakarta, at March – Mei 2008. The experiment arranged in completely randomized design with four factors i.e. the origin of elemental sulphur (from G. Welirang, East Java and from USA), the origin of phosphate rocks (Christmas Island, Ciamis and Madura), kind of inoculums fungi (A. japonicus and P. nalgiovensis) and inoculums densities (0; 106 and 107 spore/g of phosphate rock). Each treatment combinations were replicated three times. Fifty grams mixture of phosphate rocks, cassava solid waste, tapioca and rice bran was poured in 250 ml Erlenmeyer, sterilized with autoclave at 121 oC for 30 minutes, three times alternately in 5 days, then inoculated with fungus spores and incubated at field capacity in room temperature for 3 months. Samples were taken at 1, 2 and 3 months after incubation time for analysis of water soluble-P, soluble sulphate, pH and total fungus. Data analyzed statistically with F test and Duncan Multiple Range Test at 5% of level significance. The result show that the two of S oxidizing fungi Aspergillus japonicus and Penicillium nalgiovensis were be able to increases available-P of phosphate rocks, as well as soluble sulphate more than 200 % of control treatment. Penicillium nalgiovensis was more effective than Aspergillus japonicus. As P sources, phosphate rock from Christmas Island was better than from Ciamis and Madura, while elemental S imported from USA was better than local So from G. Welirang. The increase of inoculums densities and length of incubation times increase soluble P and sulphate. Keyword: phosphate rocks, S oxidizing fungi, soluble P and sulphate

KAJIAN IMBANGAN DOSIS (Chromolaena odorata) DAN UREA TERNADAP N DAN HASIL TANAMAN PADI SAWAH

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 3, No 2 (2003)
Publisher : Faculty of Agriculture, Sebelas Maret University

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ISOLASI MIKROBA ASLI TANAH ANDISOL DIENG DAN KAJIAN POTENSINYA SEBAGAI INOKULAN PUPUK HAYATI PELARUT FOSFAT

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 10, No 2 (2013)
Publisher : Faculty of Agriculture, Sebelas Maret University

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Fosfor (P) merupakan unsur hara makro yang ketersediaannya bagi tanaman seringkali rendah. Penelitian bertujuan untuk menemukan mikrobia asli tanah Andisol Dieng yang berpotensi sebagai inokulan pupuk hayati pelarut fosfat. Percobaan dilakukan di Laboratorium Biologi Tanah, Fakultas Pertanian UNS, Surakarta. Penelitian diawali dengan eksplorasi untuk memperoleh isolat-isolat mikrobia tanah Andisol Dieng, dilanjutkan dengan dua percobaan di laboratorium. Percobaan pertama menggunakan medium cair Pikovskaya dan percobaan kedua menggunakan medium vermikompos. Kedua percobaan disusun dalam rancangan acak lengkap dengan dua faktor yaitu macam isolat mikrobia (empat isolat) dan lama inkubasi (0, 1, 3 dan 6 hari untuk percobaan pertama dan 0, 2 dan 4 minggu untuk percobaan kedua). Masing-masing kombinasi perlakuan diulang tiga kali. Sebanyak 106 sel bakteri atau spora jamur diinokulasikan ke dalam tiap mililiter medium cair Pikovskaya atau tiap gram medium vermikompos.Variabel yang diamati adalah jumlah P-terlarut, kerapatan sel bakteri atau biomassa jamur dan pH medium. Hasil penelitian mendapatkan empat isolat mikrobia yang berpotensi sebagai pelarut fosfat yaitu satu isolat bakteri dan tiga isolat jamur yaitu Aspergillus niger, Fusarium sp dan Aspergillus tamarii. Jamur A. Niger memiliki potensi sebagai inokulan pupuk hayati pelarut fosfat paling tinggi bila dilihat dari kemampuannya berkembangbiak dan melarutkan fosfat dalam medium cair Pikovskaya dan medium vermikompos.

PENGARUH DOSIS INOKULUM AZOLLA DAN PUPUK KALIUM ORGANIK TERHADAP KETERSEDIAAN K DAN HASIL PADI PADA ALFISOL JUMANTONO

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 10, No 2 (2013)
Publisher : Faculty of Agriculture, Sebelas Maret University

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Padi (oryza sativa) merupakan bahan makanan pokok bagi rakyat Indonesia. Padi memiliki masalah dalam budidayanya salah satunya kurangnya unsur hara makro dan mikro dalam tanah. Tanaman padi memerlukan unsur hara terutama unsur hara Kalium (K). Efisiensi pemupukan sangat dipengaruhi oleh efisiensi serapan hara tanaman. Pemberian pupuk kalium organik dan inokulum azolla merupakan salah satu cara untuk memperbaiki unsur hara makro didalam tanah Alfisol yang umumnya memiliki unsur hara makro dan mikro yang rendah. Kalium menjadi salah satu faktor pembatas utama dalam usaha budidaya padi sawah karena tingkat efisiensi penyerapannya masih tergolong rendah. Pemanfaatan azolla disini sebagai pupuk organik memang memungkinkan bila dikembangkan. Pasalnya, bila dihitung dari berat keringnya dalam bentuk kompos, mengandung unsur Nitrogen (N) 3-5%, Phosphor (P) 0,5- 0,9% dan Kalium (K) 2-4,5%. Berdasarkan komposisi kimia tersebut, bila digunakan untuk pupuk mempertahankan kesuburan tanah, setiap hektar areal memerlukan azolla sejumlah 20 ton dalam bentuk segar, atau 6-7 ton berupa kompos (kadar air 15%) atau sekitar 1 ton dalam keadaan kering sehingga dapat mengurangi pemakaian pupuk kimia. Penelitian ini bertujuan untuk mengaplikasikan inokulum azolla dan kalium organik pada tanaman padi yang ditanam di tanah Alfisol. Dengan adanya penelitian ini diharapkan akan didapat suatu manfaat dan ilmu dalam pengembangan budidaya tanaman padi di tanah alfisol agar dapat menghasilkan produksi yang maksimum.

PENGARUH PUPUK ALAMI BERMIKROBA (BIO-NATURAL FERTILIZER) TERHADAP SERAPAN FOSFOR DAN PERTUMBUHAN KACANG TANAH PADA TANAH ALFISOL, ENTISOL, DAN VERTISOL

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 10, No 2 (2013)
Publisher : Faculty of Agriculture, Sebelas Maret University

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Pengembangan pupuk alami bermikroba diperlukan untuk mengatasi kelangkaan pupuk di Indonesia, kekahatan unsur hara, dan efisiensi pemupukan yang rendah. Penelitian bertujuan untuk mengetahui pengaruh formula pupuk alami bermikroba dan formula pupuk terbaik terhadap serapan P dan pertumbuhan kacang tanah pada berbagai macam tanah. Percobaan menggunakan Rancangan Acak Lengkap (RAL) faktorial dengan 3 faktor. Faktor pertama berupa formula pupuk alami bermikroba, yaitu P1 (vermikompos 100% tanpa bahan pengaya, tanpa inokulum mikrobia), P2 (vermikompos 66,67%, bahan pengaya 33,33% dan inokulum mikrobia fungsional NPKS dengan perbandingan 2:2:1:1), dan P3 (vermikompos 33,33%, bahan pengaya 66,67% dan inokulum mikrobia fungsional NPKS dengan perbandingan 2:2:1:1). Faktor kedua berupa varietas kacang tanah, yaitu Gajah dan Kelinci. Faktor ketiga berupa ordo tanah, yaitu Alfisols, Entisols, dan Vertisols. Variabel yang diamati meliputi P tersedia, serapan P, berat kering tanaman, pH tanah, populasi FPF, tinggi tanaman, dan berat segar tanaman. Data yang diperoleh dianalisis menggunakan uji F dan uji jarak berganda Duncan dengan taraf kepercayaan 95%. Hasil penelitian menunjukkan formula pupuk alami bermikroba berpengaruh terhadap pertumbuhan dan serapan P oleh kacang tanah pada berbagai macam tanah. Formula pupuk alami bermikroba P2 merupakan yang terbaik dalam meningkatkan serapan P oleh kacang tanah pada tanah Alfisol, Entisol, dan Vertisol, dan untuk pertumbuhan tanaman kacang tanah pada tanah Alfisol.