论文部分内容阅读
秸秆还田是改良土壤的有效途径之一,秸秆的有效降解可以增强还田效果.利用黄孢原毛平革菌对玉米秸秆进行处理,分析不同粒径秸秆对N,P,K的释放情况,筛选出玉米秸秆还田的最佳预处理条件.结果看出,不同粒径秸秆在黄孢原毛平革菌的作用下,对N,P,K等营养元素的释放存在明显差异.粒径4～5 cm秸秆全N,P,K含量增长趋势明显,在第35 d时,全N,P,K含量分别为13.13,2.05和26.24 g/kg,增长率达到了103.70%,147.90%和62.90%.粒径0.5 cm秸秆的速效N,P,K含量增长趋势明显,在第35 d时,速效N,P,K含量分别为2.71,1.75和22.80 g/kg,增长率达到了289.52%,72.50%和37.71%.
Straw returning is one of the effective ways to improve the soil, and the effective degradation of straw can enhance the effect of returning straw.The use of Phanerochaete chrysosporium to treat corn stalks and analyze the release of N, P and K from straw with different particle sizes, The optimal pretreatment conditions for corn stalks returning to the field were screened out.The results showed that there was a significant difference in the release of N, P, K and other nutrients under the action of Phanerochaete chrysosporium, The content of total N, P and K in straw increased obviously with the increase of ~ 5 cm. The content of total N, P and K was 13.13, 2.05 and 26.24 g / kg on the 35th day respectively, with the growth rate reaching 103.70%, 147.90% and 62.90 %. The content of available N, P and K of straw with a particle size of 0.5 cm increased obviously. The contents of available N, P and K were 2.71, 1.75 and 22.80 g / kg respectively at the 35th day, with an increase rate of 289.52% 72.50% and 37.71%.