水稻根系生长及其对土壤紧密度的反应  

Root growth in rice and its response to soil density.

作　　者：朱德峰[1] 林贤青[2] 曹卫星[1] 

机构地区：[1]南京农业大学农业部作物生长调控重点开放实验室,南京210095 [2]中国水稻研究所农艺系,杭州310006

出　　处：《应用生态学报》2002年第1期60-62,共3页Chinese Journal of Applied Ecology

基　　金：农业部重大项目 ( 970 1);农业跨越计划资助项目 ( 99 0 1)

摘　　要：采用筒栽方法研究了杂交稻汕优 6 3和 6 5 0 0 2在分蘖期、穗分化期、开花期和成熟期根系生长量和垂直分布以及开花期土壤容重对根系生长和分布的影响 .结果表明 ,根系生长量以开花期最高 ,开花后下降 .随生育进展 ,深层根系 (2 0～ 45cm)比例提高 .分蘖期到穗分化期是根系重量增长最快 ,且根系向下生长的主要时期 .随耕层以下土壤容重提高 ,根系生长量下降 ,同时深层根系比例下降 .Studies on root growth and vertical distribution at tillering(TL),panicle initiation(PI),flowering(FL) and mature(MT) stages and effects of soil compaction on root growth were carried out with hybrid rice of Shanyou 63 and 65002 in root box.The results indicated that root weight reached maximum at flowering stage and then decreased.With the advance of growth stage,percentage of deep roots(20～45cm in soil) increased.Root weight increased at highest rate and deep roots formed during the period of TL to PI.With increased soil weight density below 20 cm,root weight and percentage of deep roots markedly decreased.

关 键 词：水稻 根系生长 分布 根箱 土壤 紧实度 

分 类 号：S511[农业科学—作物学]