M. A. Haque
Division of Soil Science, Bangladesh Institute of Nuclear Agriculture,
P.O. Box-4, Mymensingh, Bangladesh
M. I. Ali
Division of Soil Science, Bangladesh Institute of Nuclear Agriculture,
P.O. Box-4, Mymensingh, Bangladesh
M. K. Khan
Division of Soil Science, Bangladesh Institute of Nuclear Agriculture,
P.O. Box-4, Mymensingh, Bangladesh
ABSTRACT
The study was conducted to find the impact of incorporation of green prunings from Samanea saman and Dalbergia sissoo in alley cropping system on soil fertility and subsequently yields of rice and wheat. Three treatments used were, 100 kg N ha -1 from 15N ammonium sulphate, 80 kg N ha -1 provided through prunings either from D. sissoo or S. saman plus 20 kg N ha -1 from 15N ammonium sulphate. Grain and straw yields of rice were increased by 23.8 and 32.1%. %15N atom excess (a. e.) and percent nitrogen derived from fertilizer were higher in treatment receiving 100% chemical fertilizer compared to those with tree prunings. Nitrogen contribution of tree prunings to rice yield was 51.3% in D. sissoo and 54.1% in S. saman. The positive effect of pruning was observed in P and K uptake by rice grain and straw. Residual effect of added prunings in succeeding wheat crop was also noticed for both in D. sissoo prunings (11.7%) and S. saman prunings (11.3%). In wheat crop , %15N (a. e.) and %Ndff were higher in 100% chemical fertilizer treatment compared to the residues of those with tree prunings. Nitrogen availability from the residues of tree prunings for wheat crop was 17.72 to 22.54%. P and K uptake in wheat were also more in previously tree pruning treated plots, as compared to the untreated ones. Improvement of soil fertility were observed due to application of tree prunings. Total N, available P, K and organic C were increased, resulting in good soil health, due to prunings.
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How to cite this article
M. A. Haque, M. I. Ali and M. K. Khan, 2001. Effect of Tree Prunings on Soil Fertility and Crop Yield in Alley Cropping System. Pakistan Journal of Biological Sciences, 4: 647-650.
DOI: 10.3923/pjbs.2001.647.650
URL: https://scialert.net/abstract/?doi=pjbs.2001.647.650
DOI: 10.3923/pjbs.2001.647.650
URL: https://scialert.net/abstract/?doi=pjbs.2001.647.650
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