海岛棉品系对脱叶剂喷施时间及频次的响应研究  

The Response of Sea-island Cotton Strains to the Spraying Time and Frequency of Defoliants

作　　者：白玉林 王承强 杜斌 刘露 刘霞 BAI Yulin;WANG Chengqiang;DU Bin;LIU Lu;LIU Xia(Changji Esquel Textile Co.,Ltd.,Changji,Xinjiang 831100)

机构地区：[1]昌吉溢达纺织有限公司,新疆昌吉831100

出　　处：《中国农学通报》2023年第6期26-34,共9页Chinese Agricultural Science Bulletin

基　　金：新疆维吾尔自治区科技厅重大科技专项“机采棉新品种培育及技术示范”(2021A02001-4)。

摘　　要：为明确脱叶剂喷施时间、频次对不同海岛棉品系脱叶、吐絮、产量性状及纤维品质的影响,以品系ZX102和ZX113为试验材料,采用三因素完全随机试验,设置3个喷施时间,2种喷施频次,分析不同海岛棉品系对不同处理的响应。结果表明:使用脱叶剂能明显提高脱叶率,吐絮率为40%和50%下两品系药后15 d左右时脱叶率已达90%且显著高于清水对照(P<0.05);吐絮率40%和50%下使用脱叶剂使两品系马克隆值、上半部平均长度、比强度有所降低,表现为:CK>T2>T1,其中40%时T1处理的马克隆值显著低于CK(P<0.05),不同处理下两品系铃重和籽指表现为:CK>T2>T1,其中40%时T1处理的铃重显著低于CK(P<0.05)。在海岛棉机械采收实践中,为保证产量和纤维品质,当田间吐絮率50%时可采用T2喷施方式来实现。In order to clarify the effects of spraying time and frequency of defoliants on leaf abscission,boll opening,yield traits and fiber quality of different sea-island cotton strains,ZX102 and ZX113 were used as test materials and 3 spraying times and 2 spraying frequencies were set.Three-factor completely randomized experiments were used to analyze the responses of different sea-island cotton strains to different treatments.The result showed that the use of defoliants significantly improved the defoliation rate,and the defoliation rate of the two strains at 40%and 50%boll opening rate reached 90%about 15 days after using defoliants,and they were significantly higher than that of the water control(P<0.05).The use of defoliants at 40%and 50%boll opening rate reduced the macron value,fibre length and fibre strength of the two strains,which were manifested as CK>T2>T1;at 40%boll opening rate,the macron value under T1treatment was significantly lower than that under CK(P<0.05).The boll weight and seed value of the two strains under different treatments were CK>T2>T1,and the boll weight at 40%boll opening rate under T1treatment was significantly lower than that under CK(P<0.05).In order to ensure the yield and fiber quality,T2spraying can be used at 50%boll opening rate for mechanical harvesting of sea-island cotton.

关 键 词：海岛棉 脱叶剂 喷施时间 施药频次 纤维品质 产量 

分 类 号：S572[农业科学—烟草工业]