宁夏灌区玉米径粗与气温的关系  

On the relationship between stem-diameter of corn and temperature in Ningxia Irrigation Area

作　　者：袁海燕[1] 张晓煜[1] 亢艳莉[1] 

机构地区：[1]宁夏气象防灾减灾重点实验室,宁夏银川750002

出　　处：《农业科学研究》2007年第2期5-10,共6页Journal of Agricultural Sciences

基　　金：宁夏气象防灾减灾重点实验室项目;宁夏气象防灾减灾重点实验室招标项目共同资助

摘　　要：通过对玉米径粗及影响径粗的各生育阶段气温的相关性分析,研究宁夏灌区气温条件对玉米径粗的影响.结果表明,气温是玉米生殖生长期的关键因素.其中,在玉米生殖生长期乃至全生育期中,平均最高气温、平均日较差对玉米花穗分化及干物质的积累影响都较明显.在田间试验观测取值范围内,玉米径随气温的升高而逐渐增粗,产量也随之增加.但在拔节—抽雄期、乳熟—成熟期,玉米径却随≥10℃平均积温和平均日较差的增加而逐渐变细,产量下降.The stem-diameter of corn and temperature of each procreation period in the irrigation region are studied by means of relativity analysis. The results showed that the temperature was the key factor to the procreation growth of corn. Average maximum temperature, average daily difference in temperature adversely affected the polarization of spicules and the accumulation of dry substance during the period of procreation growth and even the whole procreate period time. Among the rang of the field experiment data of corn-yield, the stem-diameter of corn would be increased with the temperature, and the yield would go up. But it would be taper off along with the increasing of ≥10 ℃ average accumulated temperature and average daily temperature difference from the jointing to the heading stage and the milk stage to the autumn, and the yield would go down accordingly.

关 键 词：宁夏灌区 玉米径粗 气温 

分 类 号：S162.5[农业科学—农业气象学]