稻草还田对免耕水稻根系生长及产量的影响  

Effects of Straw Incorporation on Root Growth and Grain Yield under No-tillage in Rice

作　　者：秦华东[1] 张玉[1] 徐世宏 李昌华[3] 何燕 丁成泉[1] 梁天锋[5] 汪妮娜[1] 杨彩铃[1] 郑土英[1] 朱贵玉[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]广西农业技术推广总站,广西南宁530022 [3]广西科技厅,广西南宁530022 [4]广西气象减灾研究所,广西南宁530022 [5]广西农业科学院水稻研究所,广西南宁530007

出　　处：《杂交水稻》2011年第4期65-67,71,共4页Hybrid Rice

基　　金：国家自然科学基金项目(30560066);广西科学基金重点项目(0832008Z;0991010Z)

摘　　要：研究了稻草还田对免耕水稻根系生长和产量的影响。结果表明,稻草还田可显著提高免耕水稻产量,显著或极显著提高单株根系干重、单株生物量、根半径、单株根表面积、单株根长、单条根长、根长密度、根系活力及超氧化物歧化酶活性,但是对单株总根数的影响不大。与3 t/hm2稻草还田量相比,6 t/hm2稻草还田量的增产效果和对根系生长的促进作用更大。The effects of straw incorporation on root growth and grain yield under no-tillage of rice were studied.The results showed that grain yield increased significantly and root dry weight per plant,biomass per plant,root radius,root area per plant,root length per plant,average root length,root length density,root activity and SOD activity increased significantly or very significantly with straw incorporation under no-tillage.However,there was not a significant effect of straw incorporation on the number of roots per plant.Compared with the straw incorporation of 3 t/hm2,the straw incorporation of 6 t/hm2 revealed an obvious superiority of grain yield and root growth.

关 键 词：水稻 稻草还田 免耕栽培 根系生长 产量 

分 类 号：S511.048[农业科学—作物学] S318