夏播甜菜,由于其生长期短,并且处于高温和多雨季节,地上部叶片与地下部块根发育比较快,因此,对养分的需求量比较大,土壤肥力的消耗也随之增大。而在众多的营养成分中,氮的需用量较多。为了掌握夏播甜菜的需氮量,以及不同数量的氮肥对甜菜生长的影响,我们作了氮肥不同数量的施肥试验,现将或验结果及初步分析如下: Summer beet, due to its short growth period, and in high temperature and rainy season, aboveground leaves and root tubers developed faster, therefore, the demand for nutrients is relatively large, the consumption of soil fertility also will increase. In many nutrients, nitrogen is more needed. In order to understand the nitrogen requirement of summer sowing beet and the effects of different amounts of nitrogen fertilizers on the growth of sugar beet, we made different amounts of fertilizers for nitrogen fertilizers. The results and the preliminary results are as follows: