棉 花 学 报 Cotton Science 2007，19(5) ：378-384
Research Progress on Fertilization Technology of Cotton Abstract：The article discussed the main progress of the evolution of fertilizer effect in main cotton production regions in China，the rule of requirement of fertilization and technique of applying fertilizer ，etc. In 1950s，applying organic matter and nitrogen fertilizer could increase yield substantially. Because of the increase in application of nitrogen and cotton yield in 1960s，the lack of soil phosphorus became prominent in a part of cotton-production regions in middle and lower region of the Yangtze River and the effect of phosphorus in calcareous soil appeared gradually in Huanghuaihai cotton-production regions. The lack of potassium became widespread in cotton-production regions in middle and lower reaches of the Yangtze River in 1970s and the effect of applying potassium is obvious，but the symptoms of lacking Zn，B，and other trace elements began to appear in part of cotton-production regions. The lack of soil phosphorus became a limitative factor of cotton yield in Huanghuaihai cotton-production regions ， there were striking effects by applying phosphorus fertilizer，especially in middle-low productive farmland of Shandong and Henan. At the same time，there were better production increasing effects by applying potassium fertilizer in Huanghuaihai cotton-production regions and the lack of soil potassium in cotton farmland became increasingly obvious with the increase of applying potassium fertilizer and the area of wheat cotton double cropping. Corresponded with soil nutrient status and the evolution of fertilizer effect，there were three periods during the study and application of fertilization in cotton farmland approximately in China in recent 50 years，the first was the period of combined application of organic matter and nitrogen fertilizer in 1950s，the second was the period of combined application of organic matter，nitrogen and phosphorus fertilizer in 1960s，the third was the period of balanced application of organic matter，nitrogen，phosphorus，potassium and other trace elements fertilizer after 1970s. At the same time，the study of nutritive characteristics and the rule of requirement of fertilization of cotton began to develop in different periods to determinate reasonable period，quantity and different prescription of applying fertilizer.
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