中国农业科学 ›› 2026, Vol. 59 ›› Issue (2): 278-291.doi: 10.3864/j.issn.0578-1752.2026.02.005

• 耕作栽培·生理生化·农业信息技术 • 上一篇    下一篇

宽窄行与增密对绿洲灌区玉米光合特性及资源利用的协同效应

陈桂平1(), 韦金贵1, 郭瑶2, 李盼1, 王菲儿1, 仇海龙1, 冯福学3, 殷文1()   

  1. 1 甘肃农业大学农学院/干旱生境作物学国家重点实验室, 兰州 730070
    2 西北师范大学生命科学学院, 兰州 730070
    3 甘肃农业大学水利水电工程学院, 兰州 730070
  • 收稿日期:2025-06-15 接受日期:2025-11-28 出版日期:2026-01-16 发布日期:2026-01-22
  • 通信作者:
    殷文,E-mail:
  • 联系方式: 陈桂平,E-mail:chengp@gsau.edu.cn。
  • 基金资助:
    国家自然科学基金(32372238); 国家自然科学基金(32460547); 甘肃省科技计划(25JRRA347); 甘肃省科技计划(24ZDNA008); 甘肃省科技计划(23JRRA1407); 高校青年教师科研创新能力支持项目(SRICSPYF-BS2025119); 甘肃省青年博士基金(2024QB-008); 甘肃省青年科技攻关“揭榜挂帅”项目(GQK2024030)

Synergistic Effects of Wide-Narrow Row and Density Enhancement on the Photosynthetic Characteristics and Resource Utilization of Maize in Oasis Irrigation Areas

CHEN GuiPing1(), WEI JinGui1, GUO Yao2, LI Pan1, WANG FeiEr1, QIU HaiLong1, FENG FuXue3, YIN Wen1()   

  1. 1 College of Agronomy, Gansu Agricultural University/State Key Laboratory of Arid Land Crop Science, Lanzhou 730070
    2 College of Life Sciences, Northwest Normal University, Lanzhou 730070
    3 College of Water Conservancy and Hydropower Engineering, Gansu Agricultural University, Lanzhou 730070
  • Received:2025-06-15 Accepted:2025-11-28 Published:2026-01-16 Online:2026-01-22

摘要:

【目的】 针对西北绿洲灌区等行距种植玉米增产潜力有限、资源利用效率不高和经济效益提升困难等普遍性科学问题,探讨宽窄行种植模式对玉米耐密性提升及其增产潜力的影响。【方法】 试验开始于2017年,于2019―2021年进行数据采集,采用裂区设计。主区设3个宽窄行行距水平,宽窄行比例为7﹕3(L1,宽行56 cm﹕窄行24 cm)、6﹕4(L2,宽行48 cm﹕窄行32 cm)和5﹕5(L3,宽行40 cm﹕窄行40 cm);裂区对应4个玉米种植密度,分别为8.25万株/hm2(D1,当地传统种植密度)、9.00万株/hm2(D2,增密9.1%)、9.75万株/hm2(D3,增密18.2%)和10.50万株/hm2(D4,增密27.3%),探讨不同行距种植结合增密对玉米光合特性、产量、资源利用效率、土壤氮素含量和经济效益的影响。【结果】 河西绿洲灌区玉米宽窄行种植和增密均提升了玉米光合特征、产量和资源利用效率。与等行距相比,宽窄行比例为7﹕3的处理分别平均提高玉米叶面积指数、大喇叭口期光截获分数、籽粒产量、光能利用效率、水分利用效率和氮素利用效率9.7%、7.1%、8.8%、8.2%、12.7%和14.1%;增密9.1%和增密18.2%的处理较当地传统种植密度的叶面积指数、大喇叭口期光截获分数、籽粒产量、光能利用效率、水分利用效率分别提高平均11.4%和15.7%、7.4%和10.1%、9.6%和11.3%、4.0%和6.1%、10.2%和20.5%。宽窄行比例为7﹕3结合增密18.2%对玉米的综合效应提升潜力大,较等行距当地传统种植密度分别提高玉米平均叶面积指数28.4%,提升大喇叭口期和灌浆期光截获分数22.0%和17.1%;分别增加玉米籽粒产量、生物量和收获指数22.2%、13.1%和8.0%;分别提高光能、水分和氮素利用效率13.5%、39.6%和24.0%;分别降低土壤全氮、铵态氮和硝态氮含量11.2%、18.0%和16.8%。此外,与等行距传统种植密度相比,宽窄行比例为7﹕3结合增密18.2%的处理提高了玉米净收益和产投比50.1%和23.3%。【结论】 宽窄行比例为7﹕3的种植模式通过改善光合特征、产量、资源利用效率及土壤氮素供给,进而增强了玉米耐密性,实现玉米综合效应提升。

关键词: 宽窄行种植, 种植密度, 玉米增产, 资源利用效率, 光合特征, 土壤氮素供给

Abstract:

【Objective】 To address the scientific challenges of limited yield potential, inefficient resource use efficiency, and constrained economic benefits in equidistant maize planting in the Northwest oasis irrigation zones of China, this study investigated the effects of wide-narrow row planting patterns on maize density tolerance and yield potential. 【Method】 This experiment began in 2017 and the data were collected from 2019 to 2021, using a split-plot design. The main plot treatments comprised three line spacing configurations characterized by alternating wide-narrow line spacing: L1 (7:3 ratio, 56 cm wide line spacing: 24 cm narrow line spacing), L2 (6:4 ratio, 48 cm wide line spacing: 32 cm narrow line spacing), and L3 (5:5 ratio: 40 cm wide line spacing, 40 cm narrow line spacing). The split-plot treatments were four maize planting densities: D1 (8.25×104 plants/hm2, local conventional planting density), D2 (9.00×104 plants/hm2, increased density by 9.1%), D3 (9.75×104 plants/hm2, increased density by 18.2%), and D4 (10.50×104 plants/hm2, increased density by 27.3%). The effects of these spacing arrangements under increasing planting density on maize photosynthetic characteristics, yield, resource utilization, soil nitrogen content, and economic benefits were investigated. 【Result】 Both wide-narrow line spacing planting and increased maize planting density enhanced photosynthetic characteristics, yield, and resource utilization efficiency of maize in the Hexi Oasis Irrigation District. Compared with wide-narrow line spacing ratio of 5:5 treatment, wide-narrow line spacing ratio of 7:3 treatment increased maize average leaf area index, light interception score at the big flare stage, grain yield, light use efficiency, water use efficiency, and nitrogen use efficiency by 9.7%, 7.1%, 8.8%, 8.2%, 12.7%, and 14.1%, respectively. Increased density by 9.1% and 18.2% treatments increased maize average leaf area index by 11.4% and 15.7%, light interception score at the big flare stage by 7.4% and 10.1%, grain yield by 9.6% and 11.3%, light use efficiency by 4.0% and 6.1%, and water use efficiency by 10.2% and 20.5% than that with local traditional planting density, respectively. Wide-narrow line spacing ratio of 7:3 with an 18.2% density increase demonstrated significant potential for comprehensive improvement. Compared with wide-narrow line spacing ratio of 5:5 and traditional planting density, wide-narrow line spacing ratio of 7:3 and increased density by 18.2% increased average leaf area index by 28.4%, enhanced light interception score at big flare and grain filling stages by 22.0% and 17.1%, respectively, and raised grain yield, biomass, and harvest index by 22.2%, 13.1%, and 8.0%, respectively. Wide-narrow line spacing ratio of 7:3 and increased density by 18.2% also improved average leaf area index, water use efficiency, and nitrogen use efficiency by 13.5%, 39.6%, and 24.0%, respectively, while reducing soil total nitrogen, ammonium nitrogen, and nitrate nitrogen contents by 11.2%, 18.0%, and 16.8% compared with wide-narrow line spacing ratio of 5:5 and traditional planting density, respectively. Additionally, wide-narrow line spacing ratio of 7:3 and increased density by 18.2% treatment increased net profit and the ratio of benefit and cost by 50.1% and 23.3%, compared with wide-narrow line spacing ratio of 5:5 and traditional planting density, respectively. 【Conclusion】 The wide-narrow line spacing ratio cropping pattern of 7:3 enhanced the comprehensive effects of densely planted maize by improving photosynthetic characteristics, resource use efficiency, and soil nitrogen supply.

Key words: wide-narrow line spacing planting, planting density, maize yield increase, resource use efficiency, photosynthetic characteristics, soil nitrogen supply