摘要
通过小区试验 ,本实验在不同生育阶段控水条件下 ,对玉米水分利用效率 (WUE)的时空变化规律进行研究。结果表明 ,抽雄期是玉米的需水关键期 ,该时期控制供水较充分 ,供水减产 1 8.2 % ,WUE减小 1 6.8%。灌浆期适度控水有利于节水增产。拔节期供水对作物株高和干物质积累影响明显 。
In order to understand spatio temporal change rules of crop WUE,it was tested in water deficit at different growth stages of corn under field plot condition.The results showed that tasseling stage of corn is the key water reqiuement period.Comparied with the treatment of the full supply water,the grain yield and WUE of corn decease 18.2% and 16.8% respectively.Suitable water defecit at silking stage of corn is usefull to increase yield and save water.Water deficit at the jointing stage markedly influenced plant height and dry matter accumulation of corn,and water consumpation at this stage is very important to yield formation.
出处
《西北植物学报》
CAS
CSCD
2000年第6期1010-1015,共6页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家重点基础研究专项经费项目(G19990117)
陕西省基金项目(98SM36)等资助
关键词
玉米
水分利用效率
时空变化
Corn
water use efficiency
spatio temporal change
