脱叶剂对不同种植模式下海岛棉机采效应及产量与品质的影响

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中图分类号：S562 文献标志码：A 文章编号：1008-0864（2026）01-0212-11

Effects of Defoliants on Machine-picking Effect， Yield and Quality of Island Cotton Under Different Planting Patterns

WU Yifan 1 ，CUI Jianping²，ZHANG Jusong1*，NING Liyun1，WANG L ！1 ，HU Haoran 1 ZHANG Chengjie'，GUO Rensong²，WANG Liang²，ZHANG Na²

（1.Research CenterofCotonEnginering，MinistryofEducation，AgricultureCollege，XinjiangAgriculturalUniversity，

Urumqi830o52，China；2InstituteofEconomicCrops，XijiangAcadeyofAgriculturalSiences，Urumqi83oina

Abstract：Inorder toinvestigatetheeffctsofdefoliantsonmachine-picking effct，yieldandqualityof islandcotton underdifferent planting modes，taking Xin78asthetest material，two-factorsplit-plot experimental design was adopted，2 planting modes were set including each film planting 3 rows （S3）and each film planting 6rows （S6）， and3dosesof defoliator spray150（F1），300（F2）， 450g⋅hm-2 （F3）were set with water as control（CK）.The effectsof defoliant dosageonmachine-picking effct，yieldandqualityof island cottnunder different planting paterns were studied.The results showed that，compared with S6 planting mode，S3 planting mode significantly improvedthemachine-pickingquality，boll weightperplant，breaking ratio strength and elongationof islandcoton by 4.5% ， 2.2% ， 1.4% and 1.6% . S6 planting mode could significantly increase the number of bolls per plant，and the seed cotton yield of island cotton under S6 planting mode increased by 14.3% .Under the same planting mode，the defoliating effect ofF2andF3 treatments was beter，and thediference between extractionqualityand yield was not significant，butF3 treatment hadanegativeefecton fiberquality.Inconclusion，undertheconditionsof this experiment，itwas recommended to adopt S6 planting mode in the island coton field，combined withthe spraying of 80% thidiazuron water dispersion granule 300g⋅hm-2 and 40% ethrel water dispersion agent 1 500 mL·hm-²，which should meet the mechanical harvesting standard and ensures high cotton yield and quality. Keywords：defoliating agent；planting pattern；island cotton；mechanical effect；yield quality

海岛棉又称长绒棉，是高端纺织品和特种纺织品不可替代的重要原料，具有较高的经济价值。（剩余16421字）