稻草还田对土壤肥力及烟后稻产量的影响

Effect of straw incorporation on soil fertility and yield of rice after tobacco

研究不同稻草还田量对耕地土壤肥力及烟后稻农艺性状、产量和经济效益的影响,结果表明:每667 m^2稻草还田500 kg,能有效地提高土壤肥力,有机质含量提高1.18 g/kg,碱解氮、速效磷、速效钾含量分别提高25.7 mg/kg、7.4 mg/kg和3.7 mg/kg;显著提高水稻结实率、千粒重,每667 m^2水稻产量增加69.9 kg,净收益增加216.9元。

Effect of different straw incorporation quantities on the soil fertility of farmland and agronomic traits, yield and economic characters of rice after tobacco were studied. The results showed that the straw incorporation quantity per 667 mz of 500 kg （7500 kg/hmz） could effectively improve the soil fertility and increase the organic matter content by 1.18 g/kg, and the content of alkali solution nitrogen, available phosphorus and available potassium by 25.7 mg/kg, 25.7 mg/kg and 3.7 mg/kg, respectively. Also it could increase seed setting rate and 1000 -grain weight of flee, increase the yield per 667 m2 by 69.9 kg （ 1048.5 kg/hm2 ） and net income by 216.9 yuan （3253.5 yuan/hmz ）.