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生产中限制大豆产量的主要因素是大豆生长后期脱肥,其表现是大豆生长前期正常,结荚期后叶片变瘦弱发黄,植株生长缓慢。有的叶片不正常的深绿或变褐紫,叶片上有很多坏死的小斑点状组织,植株早衰,呈现假象病征,表现明显脱肥。但很多种植户对这一现象认识不正确,把脱肥看成是病,采取一些防病措施,增加了不必要的成本。为了正确引导种植户,提高大豆栽培水平,对全场大豆生产田进行了调查和追肥试验示范,目的是找出易脱肥的地号和地块,以及形成脱肥的原因及对策。
The main factor restricting the soybean production in the production is the late-stage soybean de-fertilization. The performance of the soybean is normal during the early growth stage. After the podding stage, the leaves become thin and yellow, and the plants grow slowly. Some leaves are not normal dark green or brown purple, leaves a lot of necrosis of small spots of tissue, plant premature aging, showing the illusion of symptoms, the performance of obvious fat. However, many growers are not aware of this phenomenon, regard the loss of fat as a disease, take some preventive measures, and increase unnecessary costs. In order to properly guide the farmers and raise the level of soybean cultivation, the whole field of soybean production was investigated and top-dressing experiments were conducted to find out the land-clearing and plots that are easy to take off and the causes and countermeasures for the development of fertilizers.