Fruit trees are regularly watered in hot summer days
In the summer, many farmers have recently called this newspaper to ask if the orchard needs irrigation. So, when is the fruit tree watered? How to control the amount of irrigation? The reporter interviewed Wei Lixin agronomist at the Agricultural Technology Center of Heyang County, Shaanxi Province.
Master the law of water demand, and have a good idea
Different parts of apples have different water requirements during different growth stages throughout the year. Take Red Fuji apple as an example. In late March, when the red tree is weak, the entire garden is filled with water, which is conducive to increasing the fruit setting rate and promoting the growth of spring shoots. After the end of April to the beginning of May, if the weather is dry, the plants can not be poured. Watering between rows is conducive to the formation of high-quality fruit with “shaped and high pilesâ€; after the spring shoots are stopped in late May, the water is controlled for 30 to 40 days, creating conditions of less fertilizer and less water, which is beneficial to flower bud differentiation. Does not affect the development of young fruit; July is the hottest season of the year. If there is no rain, no water can be poured between the plants to ensure the double demand of water for leaf transpiration and young fruit development; if the drought is in the middle and late August No rain, just as the fruit is inflated, and the tree with a large amount of fruit can be filled with water in an appropriate amount, which is conducive to fruit enlargement. Red Fuji apples have two expansion periods throughout the year, the first time from June 15th to July 15th, and the second time from August 10th to August 30th, during the rapid expansion of these two fruits, if the tree It is stable, fruitful, drought-free and rain-free, and the topdressing and watering allows the tree to “even eat and drinkâ€.
The term "fertilizer" as used herein refers to organic fertilizers, compound fertilizers, biological bacterial fertilizers, etc., and should be rationally matched, and strive to achieve "organic-based, water-fertilizer coordination."
Five types of weak trees should be watered
1. A tree with weak trees, small buds, and small yellow leaves. This kind of tree has weak drought resistance, and in the case of continuous high temperature and drought, vegetative growth is rare and reproductive growth is excessive.
2. Trees with small leaves, thin leaves, long stop, and no secondary growth. This type of tree has a large causal consumption, but it lacks water in the ground and cannot maintain normal nutrient exchange and affect leaf function.
3. The results of the previous year were many, and the nutritional losses were excessive. There were not many fruits in the whole year, but the leaves were yellow and the trees had fallen leaves. This type of tree will recover when the rain is normal. However, in the case of drought-stricken soil water shortage, nutrition cannot be transmitted normally, and the tree potential recovery is difficult, causing the yellowing of the leaves.
4. Trees with obvious water shortage at the edge of the ditch.
5. Strip the excess tree. After the fruit tree is stripped, the water transported by the soil is lacking, and the upper and lower nutrient exchanges are seriously affected. If the air is hot and dry, it will affect the healing of the peeling.
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