水分管理对免耕抛秧水稻根系生长及产量的影响  

Effect of Moisture Management on Rice Root Growth and Rice Grain Yield at Different Growth Stages under No Tillage

作　　者：秦华东[1,2] 江立庚[1] 肖巧珍[1] 徐世宏 

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 [3]广西农业技术推广总站,广西南宁530022

出　　处：《中国水稻科学》2013年第2期209-212,共4页Chinese Journal of Rice Science

基　　金：国家自然科学基金资助项目(30560066);广西科学基金资助项目(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：研究了水分管理对免耕水稻根系生长和产量的影响。结果表明,干湿交替灌溉对根系的伸长、生长、生理及分布具有较大影响,水稻各生育期干湿交替灌溉处理水稻单株根干质量、单株生物量、根半径、根表面积、总根数、根系活力、超氧化物歧化酶活性均显著高于淹水淹灌。干湿交替灌溉处理实收产量显著高于淹水淹灌,增产主要因子是有效穗数、每穗粒数和结实率。灌浆盛期干湿交替灌溉处理单株生物量、根半径、根表面积、总根数、超氧化物歧化酶活性均显著高于湿润淹灌,水稻产量差异则不显著。The effect of different moisture management modes on root growth and rice grain yield under no tillage was studied.The results showed that dry-wet alternate irrigation had an obvious influence on rice grain yield,rice root growth,root length and physiology.The rice shoot dry weight and biomass per plant,root radius,root area,root number,root activity and supperoxide dismutase（SOD） activity under dry-wet alternate irrigation were significantly higher than those under flooded irrigation.Dry-wet alternate irrigation significantly increased rice grain yield,which resulted from increased effective panicle number,spikelet number per panicle and seed setting rate,compared with flooded irrigation.The biomass per plant,root radins,root area,root number and SOD activity under dry-wet alternate irrigation were significantly higher than those under wetting irrigation.There were no significant difference in rice grain yield between the two treatments.

关 键 词：免耕水稻 水分管理 根系生长 产量 干湿交替灌溉 

分 类 号：S511[农业科学—作物学]