稻草覆盖免耕栽培晚稻的生态效应研究

The Study on Ecological Effect of Late-rice Paddy Field under No-tillage and Rice Straw Manure

研究表明 :稻草覆盖免耕与稻草翻压比较 ,水温降低 3～ 5℃、泥温降低 1～ 3℃ ,有利于晚稻返青和分蘖 ;土壤还原性物质总量和活性还原物质含量分别低 15 6 %和 13 0 %;土壤中细菌和真菌数量高 ;土壤释放甲烷量小 ,增产 4 6 %。与无草耕耙和无草免耕比较 ,除稻草覆盖免耕甲烷释放量较高外 ,其他则表现出相似的趋势。

Results showed that:1)Compared with application of rice straw in soil (ARSS), with application of rice straw on soil surface(ARSSS), water temperature decreased 3～5 degrees adn soil temperature at 5 cm decreased 1～3 degrees in turn green and tillering stage, these are beneficial to turn green and tiller, the soil deoxidizing matter and active deoxidizing matter content was reduced by 15.6% and 13.0%, respectively, soil bacteria and fungus amount is higher, methane emission is lower. 2) Compared ARSSS with tillage and no-tillage without no rice straw, respectively, apart from methane emission of ARSSS is higher, ARSSS is characterized by a similar trend.