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稻米的主要成分是淀粉,因而关于水稻碳水化合物的研究显得尤为重要,对此,国内外已有很多文献报道(1.3.4.5.6)。一般认为,抽穗前植株积累的醣(包括可溶性糖和淀粉)大部分在抽穗后转运到穗部,其转运率依品种、施氮水平和气候条件而变化。高产良种在高氮水平积累的醣比一般品种要高得多。鉴于近年来水稻产量徘徊不前,施氮水平日益增加,研究在高氮水平下水稻品种的碳、
The main component of rice is starch, so the study of rice carbohydrate is particularly important, for which, there have been many reports at home and abroad (1.3.4.5.6). It is generally believed that most of the sugars (including soluble sugars and starch) accumulated by the plants before heading are transported to the ears after heading, and their translocation rates vary with species, nitrogen application level and climatic conditions. High-yielding seeds accumulate much higher levels of sugar at higher nitrogen levels than the general varieties. In view of the fact that the output of rice has been stagnating in recent years and the level of nitrogen fertilizer is increasing day by day, the effects of high nitrogen level on carbon,