摘要
本研究1986～1990年在山西运城地区进行。结果表明:6月20～30日,人工去除地膜棉株下部1～3个果枝上的早蕾后,对铃病具有明显的防治作用,相对防病效果达81.8～93.0%。其防病的机理,与去除早蕾后的时、空避病作用有着密切的关系。同时,结果还表明,试验处理的株高增加15.9厘米,单株铃重增加0.38克,单株铃数增加2.8个。处理和对照的衣分之间无显著差异。去除早蕾后.试验处理主茎叶内的叶绿素含量、蛋白质含量和可溶性糖含量均比对照增高;棉纤维的主要物理性能得到了进一步改善。5年间,试验处理皮棉产量增高17.8～18.0%。
During 1986～1990,experiments were carried out in Yuncheng district,Shanxi Province,The results showed that artificially removing early squares in filmmulched (FM) cotton fields on June20～30,from the lower 1～3 fruiting branches,may effectively control cotton boll rot.The disease control efficency came up to 81.8～93.0%.The mechanism of disease control described above had close relation to the disease escape of time and space after removing early squares.In addition,results indicated that treatment may increase final plant height of cotton by 15.9cm,the boll numbers per plant by 2.8,the boll weight per plant by 0.38g.There was no obvious difference between treatment and control in the ginning out— turn(%).The chlorphyll content,protein content and soluble sugar content in the main stem leaves of treated plants were also more than that in the control plant.The main physical prop- erties of cotton fiber were further improved by removing early squares.The lint yield was in- creased by 17.8～18.0% in treated fields during five years.
出处
《棉花学报》
CSCD
北大核心
1991年第2期85-94,共10页
Cotton Science
关键词
棉花
地膜覆盖
铃病
防治
Cotton
Film-mulching
Removing early squares
Boll rot control
Compensation effect of cotton
