秸秆还田和免耕对水稻土微形态特征的影响  

Effect of straw mulched and no tillage to paddy soils on micro-morphology features

作　　者：朱钟麟[1] 舒丽[1] 刘定辉[1] 陈尚洪[1] 

机构地区：[1]四川省农科院土壤肥料研究所,四川成都610066

出　　处：《生态环境》2008年第2期682-687,共6页Ecology and Environmnet

基　　金：国家粮食丰产工程(2004BA520A14C15);国家科技支撑计划(2006BAD25B04)

摘　　要：在四川盆地的平原区和丘陵区,通过4年8作的田间定位试验,研究了秸秆还田免耕和翻耕两种方式对土壤的微形态特征的影响,这对了解秸秆还田对土壤特性演化及生态环境的影响有重要意义。分别采制各处理的0～10cm和10～20cm土层的原状土样,制取土壤薄片,进行土壤微形态学比较研究。结果表明:两个试验区秸秆还田翻耕与免耕处理后,在土壤基本组成成分、形成物、土壤粗粒质和细粒质、土壤垒结及微结构等微形态特征方面均有一定的特点和明显变化。从这些土壤微形态特征得知,秸秆还田形成了良好的微结构趋势,促进了有机质腐殖化,能显著改善土壤的理化特性。An experiment was conducted to examine the influence of straw continuously returned to paddy field on soil micro-morphologic changes after eight crops in four years. The experiment was conducted in Cheng du plain and hilly area. This is of great importance to better understanding the effect of the straw on modification of soil characteristics and on eco-environment as well. Soil core samples were taken from 0-10 cm and 10-20 cm depths from different treatments and the thin sections for micro-morphological study were prepared. Results showed that soil micro-morphological features of different treatment with straw return and plowing are changed in soil basic components, pedological feature, coarse and fine material, fabric and structure. It is clearly shown that straw return to paddy soil conducive to forming better soil micro-structure, enhancing soil organic matter and improving soil fertility.

关 键 词：秸秆还田 免耕 土壤微形态 水稻土 

分 类 号：S153.6[农业科学—土壤学]