关键词: 三色堇, 三色堇, 施肥, 根冠比, 壮苗指数

Abstract:

This article uses econometric multiple regression model of Henan Province (1978-2008) investment in wheat production elements of the regression analysis, the input factors associated with wheat yield and with the correlation between the various elements, according to Henan Province, to analyze the impact of fertilizer on wheat yield significantly. However, too much fertilizer on wheat production inputs there are some negative effects, while a great impact on the ecological environment, especially the intensification of the greenhouse effect. With fertilizer input in wheat production continues to increase, fertilizer residue in the soil and plants using fertilizer N2O back into the atmosphere more and more, in order to improve wheat production is proposed to be rational fertilization, in the process of chemical fertilizer with the application of organic manure and fertilizer in accordance with a reasonable proportion of such measures.