施肥技术在茭白—水稻轮作系统中对生态环境及产量的影响

Effects of fertilizer treatments on ecological environment and yield of zizania-rice rotation system

通过田间试验,研究了3种不同施肥处理对茭白—水稻轮作系统中土壤理化性质与产品产量的影响。结果表明,在水稻收获后,有机肥处理的土壤容重达到最低,为1.15 g/cm^3;总孔隙度最大,为54.92%;贮水量最高,为27.36 mm。施用有机肥能提高土壤肥力,有机肥处理的土壤有机质、全氮总体最大,0-10 cm土壤有机质、全氮分别为46.021、.82 g/kg;10-20 cm土壤有机质、全氮分别为45.05、1.21 g/kg。有机肥处理的茭白总产量最高,为74 800 kg/hm^2。而在水稻产量上,各个处理间的差异不显著。

Zizania-rice rotation system was established and treated by 3 fertilizing methods,and the effects of fertilizer treatments on ecological environment and crop yield of zizania-rice rotation system were investigated.Results showed that the organic fertilizer was beneficial to zizania-rice rotation system system both in ecological environment and soil fertility.Soil in that cropping system had the lowest bulk density（1.15 g/cm^3） and highest total porosity（54.92%）,its water storage was 27.36 mm.The organic matter and total nitrogen in 0-10 cm layer of soil was 46.02 and 1.82 g/kg,in 10-20 cm layer was 45.05 and 1.21 g/kg.The system also had the highest zizania yield of 74 800 kg/hm^2.There was no significant difference on rice yield among the cropping system treated by different fertilizing methods.