摘要
2006—2008年,运用3种试验处理方法对运城市棉花需水规律进行了研究。结果表明：全生育期棉花的需水量为504.1-564.8 mm;开花—吐絮期需水量最大,占全生育期需水量的37.80%-43.95%,其次为现蕾—开花期;2006年和2008年需水强度最大的阶段是现蕾—开花期,分别为5.36、5.51 mm/d,其次为开花—吐絮期;2007年需水强度最大的是开花—吐絮期,为5.47mm/d,其次为现蕾—开花期。从棉花的整个生育期来看,土壤供水所占比例较小,甚至出现负值,但是从个别生育阶段来看,土壤供水是棉花耗水的主要来源。正常年份灌溉对棉花生长具有明显的增产作用,增产率为13.82%-36.30%。
Water requirement law of cotton was studied in Yuncheng from 2006 to 2008 by three different testing treatment methods.The result indicates that： Cotton water requirement of whole growth stage is 504.1-564.8 mm.The period from flowering to boll opening has the maximum water requirement,37.80%-43.93% of whole growth stage＇s,followed by the period from squaring to flowering.The period from squaring to flowering had the maximum water requirement intensity which is 5.36 mm/d and 5.51 mm/d in 2006 and 2008,followed by the period from flowering to boll opening.The period from flowering to boll opening has the maximum water requirement intensity which is 5.47 mm/d in 2007;and the period from squaring to flowering is the next.Soil water supply contributes little in whole growth stage,in some cases,there is even minus supply.But when some certain growth stage is inspected,for example the period from squaring to flowering,soil water supply is the main source of cotton consumption.In normal year,irrigation could increase the production by 13.82%-36.30%.
出处
《人民黄河》
CAS
北大核心
2011年第9期98-100,127,共4页
Yellow River
基金
国家自然科学基金资助项目(50679055)
天津农学院科学研究发展基金资助项目(2008N007)
关键词
棉花
需水量
需水规律
灌溉
运城市
cotton
water requirement
rules of water requirement
irrigation
Yuncheng City
