摘要
调亏灌溉作为一种行之有效的节水灌溉方式,对黑土区农业水资源的可持续高效利用具有重要意义。而调亏灌溉方案的优劣取决于它的综合效果,难以直观评价。以2013年在黑龙江省红星农场进行的玉米调亏灌溉技术效应的试验研究为基础,选取了8个评价指标,采用投影寻踪分类模型(PPC),利用基于实数编码的加速遗传算法(RAGA)优化其投影方向,根据投影函数值得到各评价指标对综合评价的贡献大小对不同调亏处理的各项指标进行排序。结果表明:苗期水分调亏程度为田间持水量60%的处理为最佳调亏灌溉方案,产量和水分利用效率比适宜调亏灌溉处理分别提高了2.11%和6.42%。研究结果可为黑土区玉米灌溉管理提供科学依据。
Regulated deficit irrigation, an effective way of water-saving irrigation, is of great significance for the sustainable utilization of agricultural water resources in black soil region. The merit of regulated deficit irrigation scheme depends on its comprehensive effects, and it is difficult to evaluate visually. Based on the experimental results of maize regulated deficit irrigation, which was con-ducted in Hongxing state farm of Heilongjiang province in 2013, eight model was used to optimize their projection directions. According to th uation indexes to the comprehensive evaluation could be obtained. So, could be ranked. The results showed that maintaining soil water at 60 evaluation indexes were selected, and the RAGA-based PPC e value of projection function, the contributions of every eval- th regulated deficit irrigation scheme. Compared with the normal irrigation e indexes for different regulated deficit irrigation treatments of the field capacity in seeding stage of maize was the best treatment, the yield and the water use efficiency were in-creased by 2. 11% and 6.42%, respectively. The results could provide the scientific basis for the management of maize irrigation in black soil region.
出处
《节水灌溉》
北大核心
2015年第3期81-84,共4页
Water Saving Irrigation
基金
国家科技支撑计划项目(2014BAD12B01)
东北农业大学博士基金项目
黑龙江西部丘陵漫岗黑土区坡耕地干旱渍涝与水土流失综合治理技术模式研究(2010RCB65)
黑龙江西部节水增粮高效灌溉技术集成研究与规模化示范(2014BAD12B01)
关键词
黑土区
玉米
调亏灌溉
遗传算法
投影寻踪分类模型
black soil region
maize
regulated deficit irrigation
genetic algorithm
projection pursuit classification model
