水果甜度与施氮肥杨东水果的甜度，取决于细胞内含糖分的多少。果树从谢花至谢花后的２１至２８天，幼果细胞处于分裂状态，细胞内充满着以蛋白质为主要成分的细胞质，随后细胞分裂终止。与此同时，细胞迅速吸水而膨大，致使细胞壁向外延伸，这时细胞质逐渐贴附在细胞膜周... Fruit sweetness and nitrogen fertilizer Yang Dong fruit sweetness, depending on the amount of intracellular sugar content. Fruit trees from Xiehua to thank the flowers after 21 to 28 days, young fruit cells in a split state, the cells are filled with protein as the main component of the cytoplasm, followed by cell division termination. At the same time, the cells swelled rapidly and absorbed water, resulting in outward extension of the cell wall, when the cytoplasm gradually attached to the cell membrane ...