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近年来,由于农业生产的发展,水肥条件提高,复种面积不断扩大,夏谷面积也随之增加。但夏谷产量低而不稳,主要原因是倒伏和病害,其中又以倒伏最为重要。据保定地区每年七、八月份必有一二次7—10级大风,常造成谷子严重倒伏,大幅度减产。群众不敢种谷子,面积减少,倒伏是主要原因之一。再则抽穗期雨量多,湿度大,气温高,容易发生病害。首先发生的是谷瘟病,接着是褐条病,后期有锈病,也都影响产
In recent years, due to the development of agricultural production, water and fertilizer conditions increase, the area of multiple cropping continues to expand, Summer Valley area also increases. However, the low and unstable summer cereal production is mainly due to lodging and disease, of which the lodging is the most important. According to the Baoding area, there will be one or two winds of Grade 7-10 every July and August, which often result in serious downfall of the millet and a substantial reduction in output. The masses do not dare to grow millet, their area is reduced, and lodging is one of the main reasons. In addition, the rainfall of heading stage is more, the humidity is higher, the temperature is higher and the diseases are easy to occur. The first is the occurrence of the rice blast, followed by brown stripe disease, the late rust, but also affect the production