摘要
Abstract
[ Objective ] The research aimed to study influence of meteorological factor on late growth stage of wheat. [ Method ] Based on precipitation, sunshine and wheat yield data in Anyang City in May of 1979 -2008, the positive and negative influences of meteorological condition in late growth stage of wheat (May) on wheat yield in Anyang City were analyzed by using agricultural climatic statistical method. Moreover, the reason and defense measures of green-dry hazard in late growth stage of wheat in the city were studied. [ Result] When the sunshine percentage in May > 55% , and rainfall < 45 mm, the wheat yield generally increased. But when it was overcast and rainy, and the sunshine was less, especially monthly rainfall > 80 nun, and monthly sunshine percentage < 55% , the wheat yield generally reduced. The overcast and rainy weather, flood at late growth stage of wheat were easy to cause green-dry yield reduction. The rainless weather and drought were obviously unfavorable for good harvest of wheat. In May, when precipitation was too more, or duration was too long, and the air humidity was too big, the normal water supply and inorganic nutrient transmission were affected. Meanwhile, when the overcast and rainy weather was longer, the sunshine was shorter, and the sunshine intensity weakened at late stage, it wasn' t favorable for accumulation of photosynthetic product, and the normal implementing of grouting process was affected. The measures should be used to prevent and control green-dry yield reduction of wheat, such as discharging water and preventing flood, breeding good seed, scientific planting and reasonable irrigation. [ Conclusion ] The research provided scientific basis for studying variety improvement, scientific plantation, reasonable irrigation, good quality and high yield of wheat.关键词
小麦产量/气象因子/生育后期/影响分析Key words
Wheat yield/ Meteorological factor/ Late growth stage/ Influence analysis分类
农业科技
