Effect of Green Manuring on Dryland Rabi Sorghum Productivity and Soil Quality in Vertisol
2011
Tamboli, B. D. | Shelke, S. R. | Bagwan, I. R. | Indi, D. V. | Kadam, J. R. | Deshpande, A. N.
A field experiment was conducted on Vertisol at Zonal Agricultural Research Station farm, Solapur during kharif and rabi seasons for the years 2005 - 2010 to study the influence of different green manuring crops and methods of application of manuring with chemical fertilizers on soil quality and productivity of dryland rabi sorghum in Vertisol. The experiment was laid out in factorial randomized block design with five green manuring crops in kharif viz Cowpea (Vigna unguiculata L.) and Amaranthus sp. (Amaranthus panicum) in-situ, while Takala (Cassia tora) @ 5t ha⁻¹, Tarwad (Casia auriculata) @ 5t ha⁻¹, Leucaena (Leucaena leucocephala) @ 5t ha¹ were brought from outside the field and were applied at flowering. Two methods of application viz. green manuring (in-situ) and application of green lopping followed by rabi sorghum with recommended dose of chemical fertilizers (50:25 kg ha⁻¹ N:P₂O₅) were followed. Among the green manuring crops, kharif cowpea (in-situ) significantly increased the grain and stover yield, total N- uptake, MUE of grain, soil available nitrogen and organic carbon content of soil at harvest of rabi sorghum. The methods of application of manuring did not show significant differences except in MUE for grain, and organic carbon content of soil at harvest of rabi sorghum. The microbial populations of bacteria, fungi, actinomycetes, N fixer and P solublizers were highest at the time of sowing, and thereafter, decreased at flowering and harvesting stages due to moisture stress. The green manuring (in-situ) supported the better population of microbes than green lopping.
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