关键词: 风化煤, 风化煤, 腐殖酸有机肥, 玉米, 肥料利用率

Abstract: The paper aims to reveal the effect of temperature on the growth and development of maize under the premise of basic agreement of other environmental conditions. The authors analyzed the effect of temperature change on growth, development, yield components of maize through sowing by stage tests for 3 consecutive years in Hetao irrigation district. The results showed that: (1) the cumulative temperature played a decisive role in the total weight of dry maize, the aboveground dry weight increased with the increase of cumulative temperature; (2) there was a good binomial regression relationship between the accumulated temperature and the leaf area index (LAI) and the plant height, with the increase of the accumulated temperature, the LAI and plant height increased first, and from the plant growth stop to harvest, the leaf area index and plant height dropped slowly; (3) there was a very significantly positive correlation between the 100 kernel weight and the accumulated temperature of jointing stage, and a negative correlation existed between the bald tip length and the accumulated temperature in every development phase, indicating that the accumulated temperature was a direct influence factor of maize bald tip length in seven-leaf stage, tassel stage and maturity stage; the accumulated temperature and rod weight were significantly and negatively correlated in milk stage, indicating that the higher the accumulated temperature was, the more light weight corn stick was; (4) there was a significantly positive correlation between the 100 kernel weight and the accumulated temperature of sowing-jointing-tasseling stage; (5) the higher the accumulated temperature of sowing-7-leaf stage and sowing-jointing stage was, the shorter the bald tip length was.