关键词: 毒素基因, 毒素基因

Abstract:

In order to empirical research on the contribution rate of input factors to cultivate industry, and compare the effect of human and capital investment on output, test and verify economies of scale. Selected 1978-2009 unit of the cultivated area grain yield, number of employees, agricultural machinery power as analysis indicators in Henan Province, which has the biggest grain output, the largest population of China, using Cobb-Douglas production function of regression analysis, Wald inspection with the constraint condition of regression coefficients, quantitative analysis the relationship between input elements and output, discover the quantity relationship characteristics and existing problems, targeted some suggestions and measures. The results showed that human input made more than 90% contribution of farming outputs index in Henan Province, Wald-test the simplified Cobb-Douglas functions fit good, the agricultural labor force made a large proportion of contribution to grain plant industry, and economies of scale effect was not obvious.