黑龙港地区夏播早熟玉米区气候资源研究——以河北省沧州市为例

Research on climatic resources in Heilonggang summer early-maturing district.

对黑龙港地区沧州市夏播早熟玉米区气候资源的研究表明,该区夏播早熟玉米穗粒数和粒重决定期中温度是对产量影响最大的气候因子,降雨量次之,而粒重决定期综合气候生态作用相对更大,所引起的粒重变化是穗粒数决定期综合气象作用的2倍。玉米籽粒决定期日均气温、日照时数、降雨量与穗粒数分别为正对数、正指数及负幂函数曲线关系,玉米籽粒灌浆期间粒重与日均气温呈负线性关系,与气温日较差呈正线性关系,与降雨量呈二次曲线关系。该区种植早熟玉米品种粒数决定期一般年份雨水偏多,粒重决定期则多数年份降雨不足,灌浆期热量资源过盛。

Climatic resources in Heilonggang summer early-maturing district are researched. The results show that temperature is always the most important factor in all the climatic factors in the grain number and grain weight deciding period. The second important factor is the rainfall. The comprehensive effect of all climatic factors is more greater in the grain weight deciding period than the grain number deciding period. The effect of grain weight changes is double that of the grain number. The relationships of the ear grain number with daily mean temperature, daily sunshine time,and the amount of precipitation are positive logarithmic function, positive exponential function, and negative power function. During filling period there are negative and positive linear function relationships of grain weight with daily mean temperature and daily range of temperature. The relationship of the amount of precipitation with the grain weight is quadratic cure function. Comprehensively, growing early-maturing corn breeds in this area, the rainfall is generally surplus in the grain number deciding period, but in the filling period the rainfall is generally shortage. The quantity of heat is superfluous.