草业学报2017，Vol.26Issue(12)：35-47,13.DOI:10.11686/cyxb2017250
品种、密度与覆膜方式对旱地春玉米产量和水分利用效率的影响
Effects of hybrid, plant density and plastic film mulching on yield and water use efficiency of dryland maize
摘要
Abstract
The objective of this experiment was to study the effects of hybrids,plant density and plastic film mulching on plant traits,water consumption,grain yield and water use efficiency of dryland maize to help identify opportunities to more effectively utilize limited water resources.A split-split plot designed field experiment was established;the main plot treatments were full plastic film mulching on double ridges and planting in catchment furrows (FFDRF) and flat planting with narrow plastic film mulching (NF).The split-plot treatment was hybrid;Xianyu335,Jixiang1hao and Jiudan4hao and the split-split-plot treatment was plant density;4.5 × 104 (Low),6.75 × 104 (Middle) and 9.0 × 104 (High) plants/ha.Plant height,leaf area index (LAD,dry matter,soil moisture at 0-2 m depth,grain yield and water use efficiency were assessed.The results showed that FFDRF increased height,LAI,grain yield and water use efficiency because it more allowed more effective utilization of limited precipitation compared with NF.Increased plant density reduced 100-grain weight and grain number per spike however,increased density resulted in increased dry matter,grain yield and water use efficiency.The 9.0 × 104 plants/ha density increased dry matter,grain yield and water use efficiency by 8.3％,5.2％,3.4 ％ and 27.7％,32.9％,28.1％ compared with the 6.75 × 104 and 4.5 × 104 treatments,respectively.Xianyu335 and Jixiang1hao performed better than Jiudan4hao at high plant densities;grain yield and water use efficiency were highest in Xianyu335;3.7％,1.7％ and 43.8％,37.1％ higher than Jixiang1hao and Jiudan4hao,respectively.Water consumption increased with increasing plant density and differed among hybrids;Xianyu335＞Jixiang1hao＞Jiudan4hao.Hybrids,plant density and plastic film mulching influenced the optimum plant population,water consumption,grain yield and water use efficiency of dryland maize,varieties had the greatest effect followed by plant density and mulch.Selection of appropriate hybrids and plant densities when using and plastic film mulch modes should be undertaken to maximize potential yields.关键词
旱地玉米/品种/种植密度/覆膜方式/产量/水分利用效率Key words
dryland spring maize/varieties/plant density/plastic film mulching modes/yield/water use efficiency引用本文复制引用
李尚中,樊廷录,赵刚,王磊,党翼,张建军,唐小明,王淑英..品种、密度与覆膜方式对旱地春玉米产量和水分利用效率的影响[J].草业学报,2017,26(12):35-47,13.基金项目
国家自然科学基金(31660364),甘肃省农科院基金(2015GAAS19),国家公益性行业(农业)科研专项(201303104),甘肃省重大科技专项(1502NKDA003)和国家高技术研究发展计划项目(2013AA102902)资助. （31660364）
