Paddy straw compost application to increase nitrogen fixation on soybean cultivars

International Conference on Organic Agriculture in the Tropics: State of the Art, Challenges and Opportunities

Purwaningsih, O.^1 ; Indradewa, D.^2 ; Kabirun, S.^2 ; Shiddieq, D.^2

PGRI University of Yogyakarta, Jl. PGRI I No. 117 Sonosewu, Bantul, Yogyakarta, Indonesia^1

Faculty of Agriculture, Universitas Gadjah Mada, Yogyakarta, Indonesia^2

关键词: Dry weight;    Leguminous crops;    N2 fixation;    Net assimilation rates;    Root nodules;    Straw composts;    Transpiration rates;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/215/1/012029/pdf
DOI  :  10.1088/1755-1315/215/1/012029

来源: IOP

【 摘 要 】

Soybean is leguminous crop requiring large quantity of N nutrient. The N requirement in soybean crops can be fulfilled through N2 fixation by root nodules. Root nodules can develop through the symbiosis of soybean crops with Rhizobium bacteria. This study aimed to identify the effects of paddy straw compost application on nitrogen fixation and physiological character in Baluran, Tanggamus, Seulawah, Grobogan cultivars of soybean crops.The study was conducted at regosol soil in Banguntapan, Yogyakarta.Result has showed that paddy straw compost dosage may increase soybean capabilityto perform nitrogen fixation,indicated by the variables of total root nodules, root nodule dry weight, andnitrogenase activity. Paddy straw applicationhas not provided significant effect on total chlorophyl content, leaf greeness, water content in leaf, transpiration rate and CO2 content in leaf, but has given significant effect on net assimilation rate of the crops.