秸秆还田的资源化利用与培肥土壤研究

Resource Utilization of Rice Straw and Its Effect on Soil Fertility

摘要: 采用田间小区试验和尼龙网袋法，研究了水稻秸秆还田的资源化利用过程中腐解变化特征，分析了秸秆还田对土壤性质及作物产量的影响。结果表明，水稻秸秆还田腐解率随时间延长呈增加趋势，而腐解速率则呈现早期快后期慢的特点；秸秆在耕作下还田腐解效果要好于免耕还田。水稻秸秆还田改善了土壤理化性状，提高了土壤养分含量和油菜作物的产量。该研究可为秸秆的资源化循环利用，改善农业生态环境提供参数依据。

Abstract: The characteristics of rice straw decomposition in the process of resource utilization and its effect on soil fertility and crop yields were analyzed based on nylon bags method of field trials. The results showed that rice straw decomposition ratio increased with time increasing and rice straw decomposition rate was bigger in the early stage than that of late stage. The decomposition effect of rice straw in farming is better than that of no farming. The returned rice straw not only improved the soil physical and chemical properties, but also in-creased the soil nutrient content and rape yields. The study can provide the basis parameters for rice straw resource cycle utilization and for improving agricultural eco-environment.