关键词: 棉花；生产弹性；要素投入；贡献率

Abstract:

Cotton is an important strategic material related to national interest and peoples livelihood. Cotton yield is affected by many factors. Through analyzing various production factors contribution to cotton yield increase, the basic factors promoting cotton output growth were found out to provide theoretical reliance and policy support for ensuring the supply of cotton market. Based on 4 major factors affecting the cotton yield increase, i.e. land investment, material and capital investment, labor input, disaster. Using production function, this paper calculated the various factors production elasticity and rate of contribution on cotton yield increase. The results showed that technology advance played a vital role in cotton production, land investment was the first restriction factor affecting cotton yiel increase, labor force and dizaster were the negative factors for cotton output. Before ending, the paper puts forward some corresponding policy suggestions.

Key words: cotton, production elasticity, input factors, contribution rate