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国内外试验资料表明氮是影响甜菜生长发育及块根产量的关键元素之一,虽然氮对甜菜有如此重要作用,但文献中仍在广泛讨论对甜菜施用 N 肥采用那种方法,播前一次施入或生长期分次施入最有效的问题。许多学者肯定地指出分次施用对甜菜产量的作用并不比播前一次施入优越,为了确定甜菜的合理经济施氮量及施用期,特在以往试验研究的基础上设置了有关氮肥施用技术方面的试验。
Domestic and international experimental data show that nitrogen is one of the key elements that affect the growth and tuber yield of sugar beet. Although nitrogen plays an important role in sugar beet, there is still extensive discussion in the literature about the application of sugar N to sugar beet in that method. The most effective question is to be applied in stages or in stages of growth. Many scholars affirmed that the effect of graded application on sugar beet yield is not superior to that applied before sowing. In order to determine the rational economic nitrogen application rate and the application period of sugar beet, many experts have set forth the technical application of nitrogenous fertilizer on the basis of previous experimental research Test.