辽西半干旱区种植密度对丹玉12生长发育和耗水量的影响  

Effect of Density on Plant Growth and Water Consumption of Danyu12 in Western Arid Region of Liaoning Province

作　　者：窦超银[1] 张立坤 于秀琴 于景春 

机构地区：[1]辽宁省水利水电科学研究院,沈阳110003 [2]辽宁江河水利水电新技术设计研究院,沈阳110003 [3]建平县灌溉试验站,辽宁建平122405

出　　处：《玉米科学》2013年第1期102-106,共5页Journal of Maize Sciences

基　　金：水利部科技推广计划项目(TG1203);辽西北地区农业节水丰产与抗旱减灾实用技术推广项目

摘　　要：以丹玉12为材料,研究辽西半干旱区控制灌溉条件下种植密度对玉米生长发育和耗水量的影响。结果表明,种植密度对株高影响不大,茎粗和单株叶面积随种植密度的增加而减小,叶面积指数、日耗水量、阶段耗水量和全生育期耗水量均随着种植密度的增加而增大,全生育期高密度处理玉米总耗水量高出低密度处理22%;玉米产量和水分利用效率均随种植密度的增加先增大后减小。综合考虑节水和增粮目的,在辽西半干旱地区控制灌溉条件下,丹玉12种植适宜密度为5.25万株/hm2。Effects of density on plant growth and water consumption were studied with Danyu 12 as the test crop under control irrigation in western arid region of Liaoning province. The results showed that plant height little changed as plant density changed; stem diameter and leaf area per plant decreased with increasing plant density, while leaf area index, daily water consumption, water consumption of each growing stage, and total water consumption increased, the water consumption of the highest density treatment was 22% more than the lowest density treatment; as plant den- sity increased, yield and water use efficiency increased first and then decreased. Therefore, to save water and get high- er yield, the suitable density of Danyu12 is 5.25 × 10^4 plant/ha under control irrigation condition in western arid region of Liaoning province.

关 键 词：玉米 丹玉12 耗水量 控制灌溉 水分利用效率 叶面积指数 

分 类 号：S513.047[农业科学—作物学]