In the process of fertilization, fruit trees are often supplemented with irrigation water. Fertilization can provide nutrient basis for flowering, fruiting and fruit enlargement of fruit trees. Irrigation plays an important role in alleviating drought conditions, promoting root absorption and regulating soil temperature.
Expanding water. Shoot growth and watering of young fruit during the expansion. At this point, the physiological function of fruit trees is the most vigorous, and it is called the critical period of water demand. Because the general fruit tree does not inject water during the flowering period, when the fruit enlarges, it is often the time when the new shoot is vigorously growing. When the water is insufficient, the leaves compete for the moisture in the young fruit, and it is easy to cause fruit drop. In severe drought, the leaves will also compete for water in the root tissue, affecting the root absorption, resulting in weak fruit growth and low yields.
Flower bud differentiation water. The fruit rapidly inflated and watered during flower bud differentiation. The fruit left after the physiological fruit drop quickly expands, and the flower buds are largely differentiated. The contradiction of water contention still exists. At this time, watering can not only meet the fruit's need for water expansion, but also guarantee the need of flower bud differentiation, and create conditions for high yield in successive years. But this time, watering should master that “there is no need to pour the amount of water, and the water will only look at the situation, only promoting the function of the leaves, and not promoting the growth of the branches†because excessive watering will promote growth and affect flower bud differentiation.
How to determine the amount of watering. Watering involves many factors, such as tree species, canopy size, soil quality, soil, humidity, and irrigation methods. However, the general principle is that the most suitable amount of water should be in an irrigation system to make the water reach the main root mass distribution layer. And avoid pouring "ground water", especially when the temperature is low in the spring should pay attention to a drenching, so as to avoid multiple watering, causing soil compaction, soil temperature decreased.
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