论文部分内容阅读
研究了玉米生长期间土壤微生物量碳、氮与土壤过氧化氢酶、蔗糖酶、脲酶、蛋白酶活性变化及其相关性．结果表明，玉米生长前期和中期，土壤微生物量碳、氮及酶活性迅速上升，并逐渐达到最大值；玉米生长后期，土壤微生物量碳、氮、酶活性下降至某一值后并逐渐趋于平稳．几种处理相比较，以秸秆＋尿素处理的土壤微生物量碳、氮及酶活性为最大．除玉米生长后期，土壤微生物量碳、氮与碱解氮、活性腐殖质、土壤ｐＨ不相关外，土壤微生物量碳、氮与土壤过氧化氢酶、蔗糖酶、脲酶、蛋白酶活性及速效养分在玉米生长期间均相关或极相关
The changes of soil microbial biomass C, N and soil catalase, sucrase, urease and protease activities and their correlations during maize growth were studied. The results showed that soil microbial biomass C, N and enzyme activity increased rapidly and reached the maximum at the early and middle stages of maize growth. After the maize growth, the soil microbial biomass carbon, nitrogen and enzyme activities decreased to a certain value and gradually tended to smooth. Compared with several treatments, the soil microbial biomass carbon, nitrogen and enzyme activity with straw + urea treatment were the largest. Soil microbial biomass C, N and soil catalase, sucrase, urease, protease activities and available nutrients were not significantly correlated with maize except during the late maize growth period. There was no correlation between soil microbial biomass C, N and N, active humus, During growth are related or very relevant