摘要
三峡库区春玉米盆栽水肥耦合试验研究结果表明,水分胁迫导致玉米株高和叶面积指数降低,以拔节期受到影响最大;玉米产量与生物量呈显著正相关关系,产量与根重无显著正相关关系;水氮耦合效应显著,适宜水分和中氮处理下玉米的产量最高,玉米生长发育对氮肥的吸收存在一定的阈值,过多施用氮肥会加剧土壤干旱和作物干旱,水和钾耦合效应对玉米产量影响不显著;水分是影响玉米产量的主导因素,其次是氮效应和钾效应。
The result of experimentation on coupling effect of water and fertilizers on spring corn in the Three Gorges reservoir area indicate that water stresslead the effect low of highness and LAI,and the most effect is made in shooting stage; It has a significant positive correlation between the yield of corn and biomass,and hasn't none significant positive correlation between the yield of corn and the weight of roots;The coupling effect of water and N is significant,but the coupling effect of water and K is not significant,the maximum yield of corn condition fitting-water and medium N, corn absorbs N has a threshold value during the growth,and using superfluous N is able to prick up soil drought and crop drought;Water is the leading factor which effects the yield of corn, next is N and K.
出处
《水土保持学报》
CSCD
北大核心
2005年第3期192-195,共4页
Journal of Soil and Water Conservation
基金
国家科技部"十五"科技攻关计划(2001BA604A05)部分研究成果
关键词
水肥耦合
春玉米
紫色土
三峡库区
coupling of water and fertilizers
spring corn
purple soil
Three Gorges reservoir area
