稻草还田翻耕对水稻土微生物及酶的影响研究  

Study on the Effect of Rice-straw Returned to Field on Microbes and Enzymes in Paddy Soil with Tillage

作　　者：肖嫩群[1] 张杨珠[1] 谭周进[2] 李建国[3] 盘谟谊[1] 

机构地区：[1]湖南农业大学资源环境学院,长沙410128 [2]湖南中医药大学基础医学院,长沙410208 [3]湖南省农业厅,长沙410005

出　　处：《世界科技研究与发展》2008年第2期192-194,共3页World Sci-Tech R&D

基　　金："十五"国家科技攻关课题"国家粮食(水稻)丰产科技工程"(2004BA520A01)

摘　　要：稻草直接还田是一条合理利用秸秆资源养地培肥的有效途径。为了探明翻耕条件下秸秆还田量对土壤生物学特征的影响,为制定合理的秸秆还田量,用于早稻秸秆还田培肥土壤,减少环境的污染和保障农业的可持续性发展,进行了0%、33%、67%、100%早稻秸秆连续2年覆盖翻耕对水稻土微生物及酶活性的影响研究。结果表明:经过稻草翻耕还田后,稻田土壤的生物学性状得到了一定程度的改善。不同的稻草还田量对土壤微生物数量、微生物活度、土壤酶活性以及土壤微生物作用强度的影响存在差异,33%和67%稻草还田量较0%和100%稻草还田更能改善稻田土壤质量。Rice-straw was rich with nutrient elements for crop to use and was an excellent natural resource for human kinds. There were a large number of straws produced by plants. Most of the rice-straws were incinerated and much harm gas was released to the sky. Returning rice-straw to soil was an excellent way to solve the environmental problem caused by rice-straw resource loss. The soil quality could be improved by returning rice-straw to field.At the same time,the crop could grow well and produce much biomass when the soil was covered with straw. In order to probe into the effect of returning quantity of rice-straw to field on biological character in soil and provide scientific proof for reasonable applying rice-straw to field,the studies on effect rule of tillage with 0%,33%,67%,100% quantity rice-straw to soil on the microbial quantity, microbial activity,soil rice-straw-decomposing enzyme, ammonification and nitrification in late paddy soil were conducted.The results showed that： after a long-term ploughing with rice-straw returning to field,the physicochemical property and biological condition of the rice soil were improved in a certain extent. Different returning quantity of rice-straw to soil had a different effect on the microbial quantity and activity, enzyme activity,intensity of ammonification and nitrification in soil.According to the results of the experiment,33% and 67% quantity rice-straw to soil could improve the quality of rice soil in bigger extent comparing to 0% and 100% quantity rice-straw to soil.

关 键 词：稻草还田 土壤微生物 土壤酶 微生物活度 

分 类 号：S154[农业科学—土壤学]