湖北省莲藕钾肥合理用量与运筹方式研究  

Rational Potassium Fertilization Rates and Assignment on Rhizome Lotus in Hubei Province

作　　者：刘冬碧[1] 张富林[1] 张过师[2] 段小丽[1] 余延丰[1] 吴茂前[1] 熊桂云[1] 

机构地区：[1]湖北省农业科学院植保土肥研究所,武汉430064 [2]中国科学院武汉植物园,武汉430074

出　　处：《土壤》2014年第2期239-244,共6页Soils

基　　金：国家科技支撑计划课题项目(2012BAD27B02);湖北省农业科技创新项目(2011-620-003-03-05);国际植物营养研究所项目(IPNI-HB-24)资助

摘　　要：采用田间小区试验研究了莲藕钾肥合理用量与运筹方式，结果表明：用线性＋平台模型确定莲藕K2O临界用量为232～422kg／hm^2；根据湖北莲藕生产和施肥现状，以及藕田土壤钾素含量状况，提出湖北莲藕钾肥（K2O）合理用量为225～300kg／hm^2；钾肥运筹可采用“70％基肥＋30％坐藕肥”和“50％基肥＋20％立叶肥＋30％坐藕肥”2种分配方式，前者适用于土壤质地比较黏重的藕田，后者适用于土壤质地比较轻的藕田。Rational potassium（K） fertilizer application rate and assignment on rhizome lotus were studied by field experiments. Results showed that the critical value ofK20 application rate determined by the linear ＋ plateau model was 232-422 kg/hm^2. Taken the present status of rhizome lotus production and fertilization of farmer practice, and soil K fertility in lotus field into consideration, the rational potash application rate on rhizome lotus in Hubei Province was suggested to be 225-300 kg/hm^2 K20. Two rational K fertilizer assignment styles were proposed, one was ＂70% basal fertilizer ＋30% top-dressing in late June or early July＂, the other was ＂50% basal fertilizer ＋20% top-dressing in early June ＋ 30% top-dressing in late June or early July＂. The former was suitable for lotus field with heavy soil texture, and the latter was suitable for lotus field with light soil texture.

关 键 词：莲藕 钾肥 用量 运筹方式 

分 类 号：S147.5[农业科学—肥料学]