寒旱农业科学2025，Vol.4Issue(7)：633-643,11.DOI:10.3969/j.issn.2097-2172.2025.07.008
西北地区水肥一体化密植春玉米适宜化控时期研究
Study on the Optimal Chemical Regulation Period for Densely Planted Spring Maize of Integrated Water and Fertilizer in Northwest China
摘要
Abstract
Lodging is a major limiting factor for maize yield,and the application of chemical regulators can effectively enhance stalk mechanical strength and prevent lodging.To clarify the effects of chemical regulation at different growth stages on stalk development and yield,this study used two maize varieties,MC670 and Denghai 618,as materials,chemical regulation was applied at different growth stages(5-leaf stage,6-leaf,8-leaf,10-leaf,12-leaf,15-leaf,and tasseling).Parameters such as internode morphology,mechanical strength,internode carbohydrate content,yield and its components were determined to investigate the effect of chemical regulation timing on stalk development and yield formation.Results showed that for MC670,the average internode puncture strength under the 6-leaf stage treatment increased by 10.8%over the control with no chemical regulation,the diameter of the basal 1 to 6 internodes increased by 6.1%,and internode dry matter at top,medium and bottom increased by 5.4%,18.9%and 19.0%,respectively.The contents of cellulose,hemicellulose,and lignin increased by 12.5%,14.8%and 5.4%.For Denghai 618,the average internode puncture strength of the basal 1 to 5 internodes under the 8-leaf treatment increased by 16.6%over the control with no chemical regulation,the diameter of medium internodes increased by 14.6%,internode length at bottom and medium were shortened by 11.9%and 2.0%,respectively,and internode dry matter at medium and top increased by 33.1%and 5.0%,respectively.Under 15-leaf treatment,yields of both varieties increased by 5.5%～11.2%compared to the control with no chemical regulation.The number of ears harvested did not significantly differ from the control,but the number of kernels per ear and 100-kernel weight were higher.关键词
春玉米/水肥一体化/密植/化控时期/西北地区Key words
Spring maize/Integration of water and fertilizer/Condensed planting/Chemical regulation period/Northwest region分类
农业科技引用本文复制引用
徐文倩,翟娟,张园梦,张嬉云,李少昆,薛军..西北地区水肥一体化密植春玉米适宜化控时期研究[J].寒旱农业科学,2025,4(7):633-643,11.基金项目
新疆维吾尔自治区重点研发计划项目(2023B02040-2). （2023B02040-2）
