Grapefruit is a kind of fruit in the citrus family. There are many varieties of grapefruit, and the planting area in China is also very wide. When planting grapefruit, you should do a good job in orchard management. Fertilization is a more important task in management. Therefore, we must focus on the management of fertilization when planting, then what are the precautions when we fertilize grapefruit? Let's take a look at the notes on grapefruit fertilization.
1, reasonable use
At present, the fertilized fertilizer is mainly based on farmyard manure, and the farmyard manure contains very rich nutrients, which are fertile and stable. It can effectively improve the soil structure and is conducive to the growth of grapefruit. It can increase the yield and enhance the quality. However, when fertilizing, the farmer's fertilizer must be fully decomposed, and because the nutrient content of nitrogen, phosphorus and potassium in the farmyard manure is low, it can not meet the demand of the grapefruit, so we must also apply the inorganic fertilizer. fat.
2, observe the tree potential
Before fertilizing, the fertilizer should be adjusted according to the age of the grapefruit tree. For example, the demand for nutrition in the sapling stage and the fruiting period is different, and the demand for natural fertilizer is different. Then we need to control the amount of fertilization according to flowers and trees and tree potential. In the sapling stage, nitrogen fertilizer is the main factor, and phosphorus and potassium are supplemented to promote the growth of branches and leaves. When the long-lasting pomelo tree is to control the nitrogen fertilizer, avoid the phenomenon of lengthening. Then, in the result period, the ratio of nitrogen and potassium fertilizer should be increased to promote fruit enlargement.
3. Fertilization in the growing season
In the first half of each year when the grapefruit trees are germinated in the early spring, nitrogen fertilizer is the main factor, and then the appropriate amount of phosphorus and potassium fertilizer is used to promote the spring shoots. This fertilization is very important for the growth of grapefruit trees in the current year and in the coming year. It is directly related to the yield and quality, so fertilization should be early. When the fruit is in the expansion period around July, it is mainly based on nitrogen fertilizer. The purpose is to promote fruit enlargement, and then timely topdressing in the early autumn, enhance the growth of the pomelo tree and improve cold resistance.
4, according to the weather fertilization
When fertilizing, we should pay attention to the changes in the weather, for example, it is relatively dry in spring and summer. Therefore, at this stage, we should use the fertilization method such as ditch application to properly spray the foliar fertilizer and water and fertilizer. Do not fertilize before the rain and when it rains, because if the fertilizer is washed with rain, the fertilizer will flow away with the rain, resulting in loss of effect. Therefore, we should choose to do it on a sunny day or on a cloudy day to ensure the effect of fertilizer.
5, according to soil fertilization
If the grapefruit garden is red soil, then we should choose neutral fertilizer when applying fertilizer, apply less or not acidic soil, and add appropriate amount of grass ash and other substances to neutralize the soil when fertilizing. Then use the deep application method, so the fertilization should not be too much. If it is paddy, then the fertilizer should be diluted or a high concentration of compound fertilizer should be used to prevent soil erosion and improve fertilizer utilization. Then control the fertilizer and dosage according to the nutrient content in the soil.
The above is a brief introduction to the precautions of grapefruit fertilization. Fertilization of grapefruit is very important. When fertilizing, it is necessary to ensure that the grapefruit can meet the needs of various nutrients, and prevent excessive fertilizer to cause the grapefruit to become harmful and affect growth. Therefore, everyone must pay attention to these precautions when applying fertilizer. (黔农网)
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