移栽时剪根对水稻光合特性及干物质积累的影响  

Effect of Root Cutting on Photosynthesis Characteristic and Dry Matter Accumulation of Rice

作　　者：杜震宇[1] 童淑媛[1] 王海龙[1] 李钟学[1] 魏树成[1] 张季中[1] 

机构地区：[1]黑龙江农业经济职业学院,黑龙江牡丹江157041

出　　处：《黑龙江农业科学》2011年第2期22-25,共4页Heilongjiang Agricultural Sciences

基　　金：黑龙江省教育厅高职高专2010年度科学技术研究(指导)资助项目(11555051)

摘　　要：以松-122为试材,采用田间小区试验的方法,研究了移栽时全部剪除根系、留根0.5、1.0、1.5、2.0 cm及不剪根对水稻光合特性及干物质积累的影响。结果表明:移栽时剪根对水稻生育期内叶绿素含量和灌浆期光合特性无降低作用,且与剪根程度无关;移栽时根系长度1 cm以上对干物质积累与产量无明显影响,在1 cm以下使水稻干物质积累和产量明显降低。Taking Song-122 as experimental material,based on field micro-plot experiment,the effects of root cutting on photosynthesis characteristic and dry matter accumulation of rice were discussed.The treatments were cutting off the whole root,root length with 0.5,1.0,1.5,2.0 cm and with the whole root.The results showed that chlorophyll content during the growing period and photosynthesis characteristic in filling period were not declined when root of rice was cut before transplantation,and it was not concerned in the cutting length.There was no effect on dry matter accumulation and yield when root length was longer than 1 cm before transplantation,otherwise,dry matter accumulation and yield were decreased significantly.

关 键 词：水稻 剪根 光合特性 干物质 育秧 

分 类 号：S511[农业科学—作物学]