密度与缩节胺互作对油后直播棉生长发育及产量的影响  

Effects of Planting Density and Growth Regulator Mepiquat Chloride on Growth and Yield of Cotton Sown after Harvesting Rape

作　　者：张丽娟[1] 陈俊英[1] 秦宇坤 刘慧君[1] 柯兴盛[1] Zhang Lijuan;Chen Junying;Qin Yukun;Liu Huijun;Ke Xingsheng(Jiangxi Cotton Researchinstitute.,Jiujiang,Jiangxi 332105,China)

机构地区：[1]江西省棉花研究所,江西九江332105

出　　处：《棉花科学》2022年第1期48-52,共5页Cotton Sciences

基　　金：江西省棉花产业技术体系资金资助(JXRS-22);江西省重点研发计划项目(20192BBFL60005)。

摘　　要：以中早熟棉(赣杂棉0906)为试验材料,采用裂区设计,于2017—2018年在江西省九江市研究了种植密度(5.25万、6.75万和8.25万株/公顷)和缩节胺(DPC)调控(0、210和420 g/hm^(2))对油后直播棉生长发育和产量的影响。结果表明:喷施DPC会使棉株的纵向生长受到抑制从而降低株高,但不会影响果枝数,同时有降低衣分而使籽指增加的趋势。在丰水年份,适量使用DPC可使高密度群体拥有较多的群体成铃数,而在枯水年份,使用或过量使用DPC会显著降低群体的成铃数而影响产量。长江流域棉区,油后直播中早熟棉的种植密度为6.75万~8.25万株/公顷,缩节胺用量在0~210 g/hm^(2)可获得较高产量。Taking mid-early maturing cotton(Ganzamian 0906)as experimental material,the planting density(52500 and 67500 and 82500 plants/hm^(2))and Mepiquat Chloride(DPC)regulation(0 and 210 and 420 g/hm^(2))were studied by split plot design in Jiujiang in Jiangxi province in 2017 to 2018.The results showed that spraying DPC would inhibit the longitudinal growth of cotton plants and reduce the plant height,but it would not affect the number of fruit branches.At the same time,there is a tendency to decrease the lint percentage and increase the sub-index.In the wet year,appropriate use of DPC can make the high-density population have more bolls,while in the dry year,the use or excessive use of DPC will significantly reduce the bolls,which will affect the yield.In the cotton area of the Yangtze River Basin,higher yield can be obtained of mid-early maturing cotton sown after harvesting rape when the planting density is 67500~82500 plants/hm^(2)and the dosage of DPC is 0~210 g/hm^(2).

关 键 词：密度 缩节胺 中早熟棉 油后直播 产量 

分 类 号：S562.047[农业科学—作物学]