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目前对水稻生长期间是否需要追施氮肥,要根据种植者积累的经验和目测水稻的长势来决定。很需要一种新的更好的方法来正确判断在水稻生长中期是否缺氮以及是否需要追肥。本试验的目的在确定下述方法的可行性,即根据水稻生长中期顶叶的含氮百分率和生长锥2毫米长时伸长节间的总长度这二者的数值作为诊断氮的营养状况和是否需要
The current need for topdressing of nitrogen during rice growth depends on the experience accumulated by growers and on the growth of visual rice. There is a great need for a new and better way to correctly determine whether there is a lack of nitrogen in the middle of rice growth and whether top dressing is needed. The purpose of this experiment was to determine the feasibility of the method of diagnosing the nutritional status of nitrogen based on the values of both the percentage of nitrogen in the apical lobe and the total length of 2 mm long elongate internodes of the growth cone Do you need