稻草还田对免耕水稻根系生长及空间分布的影响  

The Effects of Straw Incorporation on Root Growth during Seedling Standing Period and Root Spatial Distribution during Maturity under No-tillage

作　　者：秦华东[1,2] 肖巧珍[1] 江立庚[1] 

机构地区：[1]广西大学作物栽培学与耕作学重点实验室,广西南宁530005 [2]广西大学图书馆,广西南宁530005

出　　处：《作物杂志》2013年第3期79-82,共4页Crops

基　　金：国家自然科学基金项目(30560066);广西科学基金项目(0991010Z);国家现代农业产业技术体系广西水稻创新团队专项经费

摘　　要：研究了稻草还田对免耕抛秧水稻立苗期根系生长及成熟期根系空间分布的影响。结果表明,稻草还田显著或极显著提高了立苗期免耕水稻根冠比、单株根生物量、总根数、白根数、单条根长、根毛区长、一次分枝、二次分枝根数量、根系活力和超氧化物歧化酶(SOD)活性,对根系的伸长、生长起到明显的促进作用。稻草还田明显提高了水稻产量及免耕抛秧水稻0～10cm土层根系干重和根系体积,6t/hm2稻草还田量比对照0～10cm土层根系干重和根系体积分别高29.85%、41.62%,产量提高11.18%,差异均达显著水平。The effects of straw incorporation on root growth during seedling standing period and root spatial distri-bution during maturity under No-tillage cast transplanting were studied. The results showed that rice ratio of root to shoot dry weight, shoot dry weight and biomass per plant, root length per plant and root hair zone length, root prima- ry branches, root second branches, root activity and SOD activity increased significantly or greatly significantly with straw incorporation under no-tillage cast transplanting. Straw incorporation also increased rice yield and rice 0 - 10cm soil layers root dry weight, root volume,6t/hm2 straw incorporation significantly higher than without straw incorporation.

关 键 词：水稻 稻草还田 免耕抛栽 根系生长 根系分布 

分 类 号：S511[农业科学—作物学]