水稻节水保护性耕作的土壤理化性状及产量效应研究

通过对常规耕作和水稻节水保护性耕作的土壤理化性状、土壤酶、秸秆分解率及产量的比较分析,结果表明,水稻节水保护性耕作能降低土壤容重、增大土壤孔隙度、提高土壤速效养分,过氧化氢酶、酸性磷酸酶和脲酶活性分别比常规耕作高5.39%、14.52%、8.33%,蔗糖酶活性比常规低32.82%,表层、全耕层、深层秸秆粗分解率分别比常规耕作高11.71%、4.96%和9.10%,最终产量比常规耕作提高21.34%.

Research on Soil Traits and Yield of Rice under Water-saving Protective Tillage

The physical and chemical traits of soil, enzyme of soil, decomposing rate of straw and yield of rice under conventional tillage and water-saving protective tillage were compared and analyzed. Results showed that water-saving protective tillage of rice could decrease soil bulk density, improve soil porosity and oxidation-reduction potential. Under water-saving protective tillage, the activity of catalase, acid phosphatase, urease were 5.39%, 14.52%, 8.33% higher than conventional tillage, but the activity of sucrase was 32.82% lower than conventional tillage. And the decomposing rates of straw of surface layer, all layers, deep layer were 5.39%, 14.52%, 8.33% higher than conventional tillage. Finally, water-saving protective tillage of rice could increase the yield of 21.34% to conventional tillage.