种植密度和化控对小麦后直播棉纤维品质的影响  

Effects of Planting Density and Chemical Control on the Fiber Quality of Direct-seeded Cotton after Wheat Harvest

作　　者：蔡泽洲 杜明伟 刘震宇 吴莘玲 李丽楠 刘晓飞[1] 张祥[1] 陈源[1] 田晓莉 陈德华[1] CAI Zezhou;DU Mingwei;LIU Zhenyu;WU Xinling;LI Linan;LIU Xiaofei;ZHANG Xiang;CHEN Yuan;TIAN Xiaoli;CHEN Dehua(College of Agronomy,China Agricultural University,Beijing 100193,China;Engineering Research Center of Plant Growth Regulator,Ministry of Education)

机构地区：[1]扬州大学江苏省作物遗传生理重点实验室,江苏扬州225009 [2]中国农业大学农学院植物生长调节剂教育部工程研究中心,北京100193

出　　处：《中国农业科技导报》2019年第10期30-38,共9页Journal of Agricultural Science and Technology

基　　金：国家重点研发计划项目(2017YFD0201300,2018YFD0100400);国家产业体系棉花岗位专家项目(CARS-18-18);江苏省高等教育优势学科发展计划项目(PAPD);中国农业科学院棉花研究所植棉技术标准化研究与示范团队项目(2016PCTS-1)资助

摘　　要：为明确种植密度和化控对小麦后直播棉纤维品质的调控效应,以特早熟品种‘国欣早11-1’为研究材料,研究种植密度配合棉太金化控对小麦后直播种植方式下棉纤维品质的影响。结果表明:随着种植密度的增加棉纤维长度、比强度逐渐降低,马克隆值、纤维长度和比强度受棉太金调控效应较为明显。低种植密度下上部棉纤维比强度高,棉太金施用量为1170mL/hm^2有利于中下部棉纤维比强度的提高。中高种植密度下棉太金施用量为1170mL/hm^2时,有利于棉株各部位纤维马克隆值保持在适宜范围内。综上,在密度为90000株/hm^2、棉太金化控用量1170mL/hm^2时有利增强棉花整株的纤维品质,且有利于棉株上部和下部纤维马克隆值的优化,及纤维长度、纤维比强度和成熟度的提高。In order to clarify the regulation effect of planting density and chemical control on the fiber quality for direct-seeded cotton after wheat harvest,the short season cotton cultivar‘Guoxinzao 11-1’was used as the experimental material,the effects of planting density combined with growth regulator(Miantaijin)on the fiber quality of direct-seeded cotton after wheat harvest was studied in cotton growth season.The results showed that fiber length and fiber strength gradually decreased with the increasing of planting density,but the length,micronaire and strength of fiber increased with the increasing of Miantaijin application dose.The fiber located in the upper parts of canopy exhibited a higher strength under low density than that under higher density.Thus,the application of 1 170 mL/hm^2 Miantaijin promoted the fiber strength in the middle and lower parts.Under medium and high density,treatment with 1 170 mL/hm^2 Miantaijin application showed an optimum range of micronaire value of all cotton plant parts.In conclusion,the whole plant fiber quality was improved under treatment of 90 000 plants/hm^2 combined with 1 170 mL/hm^2 Miantaijin application.Moreover,the fiber micronaire value,the fiber length,strength,and maturity of the upper and lower part of the cotton plant were also improved under this treatment.

关 键 词：小麦后直播棉 种植密度 化学控制 纤维品质 

分 类 号：S562[农业科学—作物学]