起身期断根对冬小麦后期光合和生长的影响  

Effect of Roots-cutting in Double Ridge Stage on the Photosynthetic Rate and Later Growth of Winter Wheat

作　　者：刘子会[1] 柳斌辉[1] 李运朝[1] 郭秀林[1] 

机构地区：[1]河北省农林科学院遗传生理研究所,河北石家庄050051

出　　处：《华北农学报》2007年第5期189-190,共2页Acta Agriculturae Boreali-Sinica

基　　金：河北省自然科学基金(C2004000728);国家"粮食丰产科技工程"项目河北省子课题(2004BA520A07);河北省科技厅抗旱节水实验室开放基金(0508021-HBKLA-05)

摘　　要：通过盆栽小麦起身期断根试验,研究了断初生根和部分次生根对小麦后期光合和生长的影响。结果表明:断初生根和部分次生根,均降低了断根初期小麦光合速率,而促进后期光合速率;同时,断根降低了成熟期小麦根系干质量、地上部干质量以及产量;断初生根比断部分次生根对小麦的影响更明显。The effects of root-cutting in double ridge stage on the photosynthetic rate and later growth of winter wheat （Shi 8 and Heng 7228）growed in the pot were investigated. The results showed that： Both primary root-cutting and partial adventitious root-cutting decreased the photosynthetic rate after treated for 2 d, but increased it after treated for 20 d;At the same time, dry weight of root, biomass above the ground, and yield of maturity were all reduced;the effects of primary root-cutting on the winter wheat was greater than that of adventitious root-cutting.

关 键 词：断根 光合速率 起身期 小麦 

分 类 号：S512.101[农业科学—作物学]