摘要
综述了近50年来我国棉花主产区钾肥的增产作用及其变化趋势、增产效应及施钾技术,阐述了钾对棉花的营养作用、抗性及品质方面的影响。钾肥对棉花的增产效应因不同的植棉区和不同的年代而不同。近年来,随着化学钾肥的推广与施用量的增加,某些棉区钾对棉花的增产作用在逐渐降低。因此,化学钾肥施用的必要性、施用期及施用量原则上应根据土壤钾素丰缺状况及棉花的需肥规律而定。
The effects of potassium fertilizer on cotton yield and its changing trends,and the technology of potassium fertilizer application in main cotton production areas in China over the past 50 years were reviewed.The effects of potassium on cotton nutrient,resistance and quality were elaborated.The effects of potassium fertilizer were different in different periods and regions.In recent years,as the promotion of potassium fertilizer and the increase of applied amount,the effects of potassium on cotton yield increase was reduced gradually in some cotton production regions.The necessity of potassium fertilizer,the time and amount of potassium fertilizer application should consider the potassium condition in local soil and the needing rule of fertilization.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2010年第5期658-663,共6页
Journal of Huazhong Agricultural University
基金
国家自然科学基金项目(40801112)
中国科学院知识创新工程重要方向项目(KSCX2-YW-N-002)
国际植物营养研究所基金项目(IPNI-HB-37)资助
关键词
钾营养
品质
抗性
增产效应
施钾技术
potassium nutrition
quality
resistance
yield effect
technology of fertilization
