摘要
针对吴忠市红寺堡区产业单一效益不高、水资源严重匮乏且水资源利用率不高的问题,以膜下滴灌谷子为研究对象,利用 2022年试验数据研究了不同生育时期膜下滴灌谷子叶面积折算系数与叶面积指数的变化规律.结果显示:4 个生育时期谷子的叶面积折算系数分别为1.42、1.50、1.53和1.50;经过验证,R2 分别为0.997、0.991、0.986和0.990;纳什效率系数Ef 分别为0.992、0.989、0.979 和0.984,叶面积折算系数模拟结果良好.不同时期全试验区叶面积指数逐渐增长且增长率逐渐减小;灌浆成熟期叶面积指数为6.96.不同试验处理下叶面积指数整体呈现增长的趋势;J90、Q110、B110、J110、B130、J130与B150处理生育后期均出现负增长;B110、B130、B150处理灌浆成熟期的叶面积指数是合理的.高产灌溉制度下平均谷子产量随着叶面积指数的增加呈先减少后增加的趋势.该研究结果为谷子叶面积测量与叶面积指数及产量相关研究提供了一定参考依据.
Abstract
Aiming at the problems of low single industrial benefit,serious shortage of water resources and low utilization rate of water re-sources in Hongsipu District of Wuzhong City,taking drip irrigation of millet under plastic film as the research object,the change laws of leaf area conversion factor and leaf area index(LAI)of millet under drip irrigation under plastic milk in different growth periods were studied by u-sing the data in 2022.The results showed that the leaf area conversion factor of millet in four growth stages were 1.42,1.50,1.53 and 1.50 re-spectively.After verification,R2 were 0.997,0.991,0.986 and 0.990 respectively,and Nash efficient coefficient were 0.992,0.989,0.979 and 0.984 respectively.The simulation results of leaf area conversion factor were good.The leaf area index in the whole test area in different periods showed the variation laws of gradual growth and the growth rate gradually decreased.The leaf area index in the grain-filling maturity stage was 6.96.The leaf area index under different test treatments showed the variation of increase.The leaf area index under J90,Q110,B110,J110,B130,J130 and B150 treatments showed a negative increasing trend in the late growth period.The leaf area index in filling and mature stage under B110,B130,B150 treatments was reasonable.Under the high-yield irrigation system,the average grain yield first decreased and then in-creased as the leaf area index increased.The above results provided some reference basis for the leaf area measurement and the related study with the leaf area index and yield.
国家科技期刊平台
NSTL
维普
万方数据