新疆农业科学2017，Vol.54Issue(6)：988-997,10.DOI:10.6048/j.issn.1001-4330.2017.06.002
北疆棉区滴水量对化学打顶棉花冠层结构及产量的影响
Effect of Drip Irrigation Amount on Canopy Structure and Yield of Chemical Topping Cotton in Northern Xinjiang
摘要
Abstract
[Objective] The project aims to explore the interaction effect of chemical topping and water on cotton,the effects of different drip irrigation amount on canopy structure,dry matter distribution and yield of the chemical topping cotton in order to provide theoretical basis for chemical topping technology.[Method] Under the natural conditions in the field,the artificial topping was used as the control,and two topping agents,the combination of fluorine amine compound and DPC,were selected.After applying the topping agent,two drip irrigation (routine irrigation),middle drop water quantity (85％ normal irrigation volume) and low drop water quantity (70％ regular irrigation amount) were set up and after that,3 different water drop amount were applied.The leaf area index of different cottons were determined in different parts of the canopy light transmittance,dry matter accumulation and yield components in different conditions;The canopy characteristics,light distribution,material allocation and yield change of chemical topping cotton were analyzed under different drip irrigation conditions.[Result] Chemical topping cottons had the high leaf area index (LAI) and the longest duration,under middle drip irrigation which led to the increase of the photosynthetic area,and the appropriate DIFN,light distribution and canopy structure were beneficial to increase the light efficiency.The higher dry matter improved proportion percentage of photosynthetic material to reproductive organs.The lower drip irrigation amount also decreased the cost compared with the high drip irrigation.And the middle drip irrigation amount treatment significantly increased seed cotton yield compared to the low drip irrigation amount treatment.[Conclusion]Therefore,the two irrigation should be controlled in middle drip volume (32m3/667 m2) after spraying topping agent,which can not only optimize chemical topping cotton canopy structure,but also promote photosynthetic material to the reproductive organ allocation and give full play to water-saving irrigation under mulch,and increase the efficiency and productivity.关键词
棉花/化学打顶/滴水量/冠层结构/物质分配/产量Key words
cotton/chemical topping/drip irrigation amount/canopy structure/dry matter distribution/yield分类
农业科技引用本文复制引用
徐守振,杨延龙,陈民志,董恒义,张旺锋..北疆棉区滴水量对化学打顶棉花冠层结构及产量的影响[J].新疆农业科学,2017,54(6):988-997,10.基金项目
The National Key Technology R&D Program of China (2014BAD09B03)国家科技支撑计划课题(2014BAD09B03) （2014BAD09B03）
