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SIFAT KIMIA TANAH, POPULASI BAKTERI PELARUT FOSFAT, DAN HASIL CABAI PADA APLIKASI BEBERAPA JENIS MULSA PADA INCEPTISOL NGEMPLAK, BOYOLALI

Caraka Tani: Journal of Sustainable Agriculture Vol 32, No 2 (2017): October
Publisher : Universitas Sebelas Maret

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Mulch was often applied on chili pepper cultivation. It aimed to cover the soil from various factors which can reduce the yield. This research aims to study the effect of various types of mulch (silver-black plastic and straw) to soil chemical properties, population of PSB, and chili pepper yield (harvest time, weight of dry plant biomass, and weight of fresh fruit per plant), also to study the correlation between the population of PSB with chili pepper yield. The research has been conducted from December 2015 until October 2016, on an inceptisol field in Ngemplak, Boyolali. The variables of this research are soil properties (pH, organic-carbon, total-N, available-P, and exchangeable-K), total-PSB, and chili pepper yield (harvest time, a weight of dry plant biomass, and weight of fresh fruit per plant). The result showed that various types of mulch application significantly increased soil-pH, soil total-N, soil available-P, total-PSB, a weight of dry plant biomass, a weight of fresh fruit per plant, and fastened harvest time. It also tends to increase organic-carbon and soil exchangeable-K. There were strong correlations between total-PSB and harvest time, a weight of dry plant biomass, and weight of fresh fruit per plant. The best result showed by silver-black plastic mulch application.

PENGARUH DOSIS INOKULUM AZOLLA DAN PUPUK FOSFAT ALAM TERHADAP KETERSEDIAAN P DAN HASIL PADI DI ALFISOL

Caraka Tani: Journal of Sustainable Agriculture Vol 29, No 2 (2014): October
Publisher : Universitas Sebelas Maret

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Rice production in Indonesia can not cover the national needs. The low productivity caused by the decline in soil fertility. One way to increase the phosphorus content in the soil is to provide natural phosphate fertilizer and Azolla inoculum. This study was conducted to determine the proper dose of Azolla inoculum and rock phosphate to increase the availability of phosphate and increase the yield of rice plants on land Alfisol. This study uses the two-factor factorial CRD comparative treatment of manure and fertilizer N, P, K. Analysis of the observed data using analysis of variance at 5% level and if there is a significant difference effect followed by DMRT 5% level to compare between treatments. The results showed that treatment of Azolla inoculum and phosphate can increase the availability of phosphate in the Alfisol soil and can increase rice yield. On the parameters available P showed the highest results in the treatment of Azolla 2.5 tons / ha without natural phosphate and Azolla 5 tons / ha of natural phosphate 350 kg / ha which is 10.81 ppm. In addition, administration of Azolla inoculum and phosphate levels give rise to CEC, organic matter, total N in the soil and soil pH.

PENGARUH BAHAN ORGANIK TERHADAP POPULASI Aspergilhis flavus PADA BEBERAPA JENIS TANAH

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 2, No 1 (2002)
Publisher : Faculty of Agriculture, Sebelas Maret University

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The objective of the research was to study the effect of soil type and organic matters applied on the growth of innoculated Aspergilus flavus. Considering the caracleristics of soil and organic matter source types, the organic carbon content total nitrogen content. C/N ratio and pH of the soil were analized. The research design used was completely randomized block design with two factors, namely soil type (regosol, grucmosol and latosol) and organik matters applied (control; manure and straw). Treatment replication was considered as variation source of block. It was indicated that there was signcant effect (P < 0,05) of soil type on the growth of the fungsi. Latosol tended to give higher growth than regosol and grumosol. Though no significant effect of organics matters indicated, the fungsi showed better growth with application of straw. It seemed the result had nothing to do with the carbon and nitrogen content of the soil. They might be caused by other factors that should be studied further

POTENSI ISOLAT MIKROBIA ASAL ANDISOL DIENG, JAWA TENGAH SEBAGAI INOKULUM PUPUK HAYATI PENGOKSIDASI SULFUR

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 10, No 1 (2013)
Publisher : Faculty of Agriculture, Sebelas Maret University

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Masalah kekahatan hara cenderung meningkat, termasuk kekahatan sulfur. Penggunaan pupuk NPK berkemurnian tinggi ikut mendorong terjadinya kekahatan hara di lahan pertanian. Masalah kekahatan hara ini dapat diatasi melalui penggunaan sulfur elementer yang disertai denngan pupuk hayati pengoksidasi sulfur. Penelitian bertujuan untuk mengkaji potensi mikrobia pengoksidasi sulfur yang diisolasi dari tanah Andisol Dieng, Jawa Tengah sebagai inokulan untuk pupuk hayati. Tanah Andisol Dieng secara alamiah mengandung sulfur yang cukup tinggi sehingga diperkirakan dihuni oleh banyak mikrobia pengoksidasi sulfur. Penelitian terdiri dari dua percobaan, masing-masing disusun dalam rancangan percobaan acak lengkap dua faktor, yaitu macam isolat mikrobia hasil isolasi dari Andisol Dieng dan lama inkubasi. Percobaan pertama menggunakan medium cair Czapek-dox + sulfur sedangkan percobaan kedua menggunakan medium vermikompos. Tiap-tiap kombinasi perlakuan diulang tiga kali. Variabel yang diamati meliputi jumlah S terlarut, kerapatan sel bakteri atau biomassa jamur dan pH medium. Dari hasil eksplorasi diperoleh satu isolat bakteri I1 dan tiga isolat jamur F1, F2 dan F3 yang menunjukkan kemampuan mengoksidasi sulfur pada medium Czapek-dox+ sulfur elementer agar. Hasil percobaan menunjukkan bahwa proses oksidasi sulfur meningkat seiring dengan bertambahnya waktu inkubasi yang ditunjukkan oleh meningkatnya jumlah S-terlarut, kerapatan sel bakteri atau biomassa jamur dan menurunnya pH medium. Hasil serupa diperoleh dari percobaan kedua. Isolat jamur F2 menunjukkan potensi yang paling tinggi sebagai inokulan pengoksidasi sulfur yang ditunjukkan oleh kemampuannya tumbuh dan mengoksidasi sulfur yang paling tinggi baik pada medium cair Czapek-dox + sulfur maupun pada medium vermikompos.

KAJIAN PEMANFAATAN LIMBAH INDUSTRI ALKOHOL CIU BEKONANG SEBAGAI BAHAN PUPUK ORGANIK CAIR PLUS

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

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SERAPAN DAN KETAHANAN AZOLLA TERHADAP KROMIUM PADA VERTISOLS DAN ENTISOLS DENGAN BERBAGAI TINGGI GENANGAN AIR

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 6, No 2 (2009)
Publisher : Faculty of Agriculture, Sebelas Maret University

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This research aims to study the effect of water level, soil kind, chromium concentration (Cr), and their interactions on uptake and tolerance of azolla to Cr. The research was done in March to May 2009 in the green house of Faculty of Agriculture, Sebelas Maret University, Surakarta. The research used completely randomized design (CRD) factorial with three treatment factors, they were: soil kind (Vertisols of Jatikuwung and Entisols Colomadu, Karanganyar), water levels (0; 2; and 7 cm) and Cr concentrations (0; 5; 10; 15; and 20 ppm). There were 191 g of Vertisols and 200 g of Entisols pass to 2 mm sieve put into plastic pot and watering at various levels according to the treatments. A gram of fresh azolla was spread on each pot and incubated for three weeks. Each treatment combinations were replicated three times. Sampling was taken at 1, 2, and 3 weeks after planting for azolla biomass, Cr uptake of azolla, available Cr, and Cr toxicities symptoms of azolla. The data analyzed statistically by Kruskal Wallis test at 95% level significant, followed with Mood Median test. The result shows that soil kind has no significant effect, while water level, Cr concentration, and treatment interaction contribute highly significant influence on uptake and tolerance of azolla to Cr. The highest uptake of Cr at the Vertisols was taken at 7 cm water level and 15 ppm Cr concentration, while at the Entisols was in 2 cm of water level and 15 ppm Cr concentration. Azolla most tolerance to Cr at treatment combination of 2 cm water level and 10 ppm Cr concentration in Vertisols, and at 2 cm water level and 5 ppm Cr concentration at Entisols. Keywords: A. mycrophylla, chromium, Cr uptake and tolerance, water level

LAJU PERTUMBUHAN DAN PENAMBATAN N2 AZOLLA PADA BERBAGAI INTENSITAS PENYINARAN DAN TINGGI GENANGAN

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

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Pengaruh Sifat Ketidakbalikon Tanah Gambyang Dihadapkan Pada Tingkat Lengas dan Lama Inkubasi Tertentu Terhadap Beberapa Sifat Kimianya

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

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EFEKTIVITAS BAKTERI PELARUT FOSFAT PADA BEBERAPA MACAM BAHAN PEMBAWA INOKULUM

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

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PENGARUH SAAT PEMUPUKAN UREA PADA SISTEM GANDA AZOLLA‐PADI SAWAH TERHADAP N‐KAPITAL TANAH DAN HASIL PADI DI ENTISOL

Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 8, No 2 (2011)
Publisher : Faculty of Agriculture, Sebelas Maret University

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The purposed of research was to study the effect of urea use in dual system azolla‐rice paddy to soil capital nitrogen and rice yield on Entisol. Research was conducted on rice paddy field at Colomadu, Karanganyar district, Central Java. The experiment arranged in single factor randomized completely block design (RCBD), with eight treatments says D1 (azolla + 100 kg urea /ha at 0 day after planting‐dap), D2 (azolla + 100 kg urea /ha at 30 dap), D3 (azolla + 100 kg urea /ha at 60 dap), D4 (azolla + 50 kg urea /ha at 0 and 30 dap), D5 (azolla + 50 kg urea /ha at 30 and 60 dap), D6 (azolla + 50 kg urea /ha at 0 and 60 dap), D7 (control treatment ‐ without azolla nor NPK fertilizer), and D8 (lokal farmer treatment ‐ 250 kg urea /ha split three times, 50 kg/ha at 0 dap, 100 kg/ha at 30 dap and 100 kg/ha at 60 dap). Azolla inoculums spreaded 7 dap at rates 500 g/m2. Variables observed were soil capital nitrogen, soil total‐N, tissue total‐N, soil organic matter content and rice yield. Data taken was analyzed with anova and followed with Duncan Multiple Range Test (DMRT) at 5 % level of significant. The results show that the use of urea in dual system azolla‐rice paddy increase soil capital nitrogen, soil total‐N, tissue total‐N, soil organic matter content and rice yield at Entisol. The highest soil capital nitrogen (0,953 kg/ha) and rice yield (8 ton/ha) were taken from the treatment of D8 and D3 respectively. Keywords: azolla‐rice paddy, rice yield, soil capital nitrogen, Urea