In the current agricultural production, the color and sweetness of the fruit is the key to its price. How to increase the sweetness of the fruit? Some farmers' friends asked if the application of nitrogen fertilizer is related to sweetness. Today, let's take a look at the relationship between the two.
The sweetness of a fruit is determined by the amount of sugar in its cells, while the accumulation of sugar is closely related to fertilizers, especially nitrogen. Therefore, the sweetness of the fruit is related to nitrogen fertilizer. From the fruit tree Xiehua to the 28th day after the flowering, the cells of the young fruit are in a state of breakage. The cells are filled with protein-based cytoplasm. After that, the cells break and stagnate, and the water is swollen and the cell wall is extended outward. At this time, the cytoplasm gradually adheres to the periphery of the cell membrane, forming a large vacuole in the center, which is a bubble liquid, which is the main occasion for the fruit to store starch, organic acids and the like. When the fruit matures, the vacuole is almost filled with starch and gradually decomposed into fructose, glucose and sucrose, so that the sweetness of the fruit increases dramatically.
If the application of excessive nitrogen fertilizer is beneficial to the formation of protein, it will increase the cytoplasm in the cell, resulting in a delay in the cytoplasmic mononuclear edge and a corresponding decrease in the vacuole volume, which directly hinders the storage of starch. At the same time, excessive application of nitrogen fertilizer will make the new shoots of the fruit trees flourish, and the sugar produced by the leaves will be consumed in a large amount, which reduces the transportation to the fruit and affects the sweetness of the fruit.
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