摘要
研究了麦后夏播棉的促早避霜技术。麦后夏播棉有效开花结铃期短而集中 ,总结铃数的73 3%～ 88 9%集中在 7月 31日～ 8月 14日之间。山西南部适宜种植的密度为 12万～ 15万株 /hm2 。筛选出运 379(3)h、晋棉 17号等早熟品种。喷施避霜剂 (壮早丰 ) ,可以降低株高 ,塑造理想株型 ,促进早熟 ,皮棉增产 9 74 %。麦后夏播棉避霜技术应采用早熟品种、早播种、早施肥、早灌水、高密度、早打顶、喷施壮早丰和乙烯利 。
The experiments were conducted from 1991-1999 to study the premature and frost avoiding techniques of summer cotton which is planted after winter wheat or rape harvest in May or June.Yun 379(3) and Jinmian No.17 of premature cotton varieties were selected.Flowering and bolling period of summer cotton is shorter and more concentrated. 73 3%-88 9% of bolls are formed from July 31 to Aug.14.Their planting density are 12×10 4-15×10 4 plants/ha in southern Shanxi.Application of Zhuang zao feng,a frost-avoiding agent,will lower plant height,form compact plant type,accelerate cotton premature and make lint yield increased by 9 74%.In order to prevent cotton from frostbite,premature technique system are taken such as earliness variety,early sowing,fertilizer address,irrigation,high planting density,early tip pruning,spraying frost-avoiding agent and ethephon diseases and insects control.
出处
《华北农学报》
CSCD
北大核心
2002年第2期53-57,共5页
Acta Agriculturae Boreali-Sinica
基金
九五国家攻关项目<霜冻灾害综合防御实用技术研究>棉花子专题 (96 - 0 2 0 - 0 1- 0 8- 0 1)部分内容
关键词
麦后夏播
促早避霜集成技术
棉花
Summer seeding
Cotton
Frost-avoiding
Earliness integrated techniques
