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众所周知,磷素是植物营养的要素之一。在农业实践上,磷肥施用的广泛性仅次于氮肥。磷对植物的意义,首先就在于它是细胞原生质和细胞核的主要组成部分。因为磷存在于原生质主要部分的磷酯(如(?)磷(?)腦磷(?))之中,而且细胞核中的核蛋白质内,也含(?)磷,此种核蛋白质却又是活原生质、细胞核和染色体的组成部分之一。所以磷是植物细胞分裂和凡殖过程所必需的元素。磷的重要性还表现在它直接参与植物体内碳水化合物如(?)类、淀粉、纖維素物质的合成和分解过程(即所谓碳素代谢)。因为碳水化合物必须在与磷酸形成所谓磷酸酯以后,才可能进一步分解。在植物呼吸作用中,许多(?)(酵素)的活动,也和
As we all know, phosphorus is one of the elements of plant nutrition. In agricultural practice, the widespread use of phosphate fertilizer is second only to nitrogen fertilizers. The significance of phosphorus to plants, above all, is that it is a major component of the cell’s protoplasm and nucleus. Because phosphorus is present in phosphates (such as phosphatidylserine (?)), Which is a major part of the protoplasm, and is also present in nuclear proteins in the nucleus, One of the components of living protoplasm, nucleus and chromosome. Therefore, phosphorus is an essential element in plant cell division and process. The importance of phosphorus is also demonstrated by its direct involvement in the synthesis and breakdown of carbohydrates such as (?), Starch, and cellulosic materials in plants (the so-called carbon metabolism). Because carbohydrates must form so-called phosphates with phosphoric acid before they are likely to break down further. In plant respiration, many (?) (Enzyme) activities, too