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在甜菜种植试验中,往往都要测定一下甜菜幼苗百株重,测定的时间一般是在四对真叶的时候,也有人提出应在出苗后第21天测定,认为这个时间的甜菜幼苗百株重量与收获时的产量、糖分具有正相关。为什么甜菜幼苗百株重与甜菜的产量、含糖率之间有一定的相关性呢?这主要是幼苗百株重与甜菜的营养元素临界期的养分代谢规律、土壤水份状况及田间管理水平有密切关系。甜菜吸收氮、磷、钾及某些微量元素的营养临界期几乎都是在生育前期。在这个时期甜菜对
In the sugar beet cultivation test, it is often necessary to determine the weight of sugar beet seedlings one hundred, the determination of the time is usually four pairs of true leaves, it was also proposed should be determined on the 21st day after emergence, that the time of sugar beet seedlings 100 Weight and harvest yield, sugar has a positive correlation. Why is there a certain correlation between the yield of sugar beet and the yield and the sugar content of sugar beet in one hundred plantlets of sugar beet seedlings? This is mainly the nutrient metabolism in the critical stage of nutrient elements of one hundred seedlings and sugar beet, soil moisture status and field management There is a close relationship. Sugar beet absorption of nitrogen, phosphorus, potassium and some trace elements of the nutritional critical period are almost always in the early stages of reproduction. Beet right in this period