论文部分内容阅读
我国华北和西北冬麦区大陆性气候强烈,冬季寒冷且温差大,雪少干旱,在小麦越冬期间容易发生死苗。特别是北方冬小麦的边缘地区,如河北与山西的中北部,陕西北部及陇东地区,某些年份死苗程度相当严重。解放后,在某些原属春麦区,或春、冬麦兼种地区,由于种植冬小麦有利于调节人力和物力,而且增产,在经过试种的基础上也逐渐推广了冬小麦的种植。在这些地方种植冬麦,有些年份越冬较好,产量高;但有些年份则在越冬期间死苗较多,有的甚至不得不翻耕改种。
China’s northwestern and northwestern winter wheat area has a strong continental climate, with cold winters and large temperature differences, with less snow and drought. Dead shoots tend to occur during the winter in wheat. Especially in the fringe areas of northern winter wheat, such as the north-central part of Hebei and Shanxi, the northern part of Shaanxi and Longdong, the degree of dead seedlings in some years is rather serious. After the liberation, in some original spring wheat areas, or spring and winter wheat in both areas, due to the cultivation of winter wheat is conducive to the regulation of manpower and material resources, and increase production, after a trial based on the gradual promotion of winter wheat cultivation. Winter wheat has been planted in these areas, with winter winters and high yields in some years. However, in some years more dead shoots are found during the wintering period, and some even have to be re-cultivated.