不同的秸秆还田对土壤理化性质及水稻产量的影响

Effects of Different Crop Straw Returning to Soil on Soil Physico-chemical Properties and Rice Yield

研究了不同的作物秸秆还田对土壤理化性质及水稻产量的影响。结果表明,秸秆还田对土壤物理性质的影响明显,与单施化肥的对照相比,秸秆还田处理的土壤容重下降。添加了秸秆的处理都比单施化肥的对照稻谷产量高,最多增产500.00 kg/hm^2,增产率为7.62%;添加了秸秆腐熟菌剂的秸秆还田处理均比不添加秸秆腐熟菌剂的秸秆还田处理的稻谷产量高,最多增产438.34 kg/hm^2,增产率为6.62%。化肥+麦秸+腐熟菌剂与化肥+油菜秸+腐熟菌剂的稻谷产量最高。不同的秸秆还田处理都比单施化肥处理的有效穗多。秸秆还田能够改善土壤的物理性质,增加水稻的产量。

The effects of different crop straw returning to soil on soil physico-chemical properties,crop yield and yield com-ponent were studied in single cropping rice system of Yunmeng county, Hubei province. The results showed as following：Soil bulk density in crop straw returning to soil treatment was decreased in contrast to single application of chemical fertilizer. The rice grain yield were increased with crop straw returning to soil, with the highest increase of 500.00 kg/hm2,with increasing rate of 7.62%. Compared with crop straw returning to soil treatment only, the rice grain yield with the returning straw＋straw-decomposing inoculants was increased,with the highest increase of 438.34 kg/hm2,with increasing rate of 6.62%. The rice grain yield were highest in wheat or rape straw＋straw-decomposing inoculants treatments. In comparison to single application of chemical fertilizer treatment,productive spike of rice were increased with chemical fertilizer combined with crop straw re-turning to soil treatment.