Technical points of application of fruit and vegetable micro-fertilizer
2019-04-10 06:01:18
Most of the orchards in Fuzhou are distributed on the fertile soil such as beaches and sloping fields. In the management of orchard, the “three elements of fertilizer†of NPK are often supplied through a large amount of soil fertilization, but the medium and trace elements consumed for many years are not. To the corresponding return and supplement; in recent years, the area of ​​orchard has expanded rapidly, and the application of organic fertilizer has not kept up, which has also aggravated the contradiction between the shortage of medium and trace elements. Especially in the rainy season, good light and heat conditions and sufficient water content of the soil have created conditions for the rapid growth of farmland crops and economic fruit trees. However, after the rain, fruit trees such as citrus and lychee often have symptoms such as fruit drop and yellowing caused by boron deficiency or zinc deficiency. This may be due to rapid plant growth and insufficient supply of soil nutrients, especially the shortage of trace elements.
From the analysis of the nutritional characteristics of fruit trees, the micro-fertilizer applied by the soil is long from the roots of the fruit trees to the leaves, and it is more difficult to transport and redistribute over long distances. In addition, the application mode of micro-fertilizer is different from that of a large number of elements. The demand for micro-fertilizer is very small, and the concentration range that can be adapted is narrow. At present, the application of micro-fertilizer is mainly soil fertilization and root-dressing. If the method of soil application is adopted, the amount of fertilizer application is small, the application is uneven, the cost is high, and the utilization rate is low. Therefore, foliar spray is an effective method to correct the deficiency of trace elements in fruit trees. Foliar fertilization is a method of fertilizing a low-concentration solution of a water-soluble fertilizer or biological substance onto a growing crop leaf. The advantage is that the above-ground nutrient is directly supplied, and the utilization speed is fast, so that the effective nutrients of the fertilizer are prevented from being fixed and degraded in the soil. Foliar fertilization has higher nutrient use efficiency than soil fertilization, and can directly and effectively solve trace element deficiency. Its shortcoming is: the fertilizer effect is limited for a short time, it is a kind of auxiliary fertilization. For soils that are seriously deficient in certain medium and trace elements, they must rely on soil fertilization to have obvious effects. Therefore, in order to achieve the desired effect of fruit tree spray fertilizer, the following technical essentials must be mastered:
1. The choice of fertilizer. Mainly to supply the lack of medium and trace element fertilizers. Do not choose the so-called "Tenquan" large fluid, which is expensive and non-targeted, and the effect is not good. Therefore, it can be based on simple fertilizer. In view of the complexity of the micro-fertilizer market, when individual farmers purchase micro-fertilizers, they must choose a brand to buy good goods, and second, they must jointly purchase groups.
2. The concentration is suitable. If the concentration is too low, the effect will not be achieved. If it is too high, it will cause fertilizer damage. The optimum concentration will vary depending on the target crop, growth period and element type.
3. The number of spraying. Fruit tree spray fertilizer usually takes 2 shots to be effective. In case of special problems such as disasters or obvious symptoms, spray 3-5 times.
4. Spraying parts. The positive and the back of the leaves, stems and young fruits can be sprayed, but the spraying of flowers and buds should pay special attention to the concentration. Because the number of stomata on the back of the leaves is more than the front, the absorption will be more.
5, spraying time. Avoid wind, rain and noon time. It is advisable to go before 10 o'clock in the morning and after 4 o'clock in the evening.
Author: Zhang Yanhui
Source: Fujian Yongtai County Agriculture Bureau
From the analysis of the nutritional characteristics of fruit trees, the micro-fertilizer applied by the soil is long from the roots of the fruit trees to the leaves, and it is more difficult to transport and redistribute over long distances. In addition, the application mode of micro-fertilizer is different from that of a large number of elements. The demand for micro-fertilizer is very small, and the concentration range that can be adapted is narrow. At present, the application of micro-fertilizer is mainly soil fertilization and root-dressing. If the method of soil application is adopted, the amount of fertilizer application is small, the application is uneven, the cost is high, and the utilization rate is low. Therefore, foliar spray is an effective method to correct the deficiency of trace elements in fruit trees. Foliar fertilization is a method of fertilizing a low-concentration solution of a water-soluble fertilizer or biological substance onto a growing crop leaf. The advantage is that the above-ground nutrient is directly supplied, and the utilization speed is fast, so that the effective nutrients of the fertilizer are prevented from being fixed and degraded in the soil. Foliar fertilization has higher nutrient use efficiency than soil fertilization, and can directly and effectively solve trace element deficiency. Its shortcoming is: the fertilizer effect is limited for a short time, it is a kind of auxiliary fertilization. For soils that are seriously deficient in certain medium and trace elements, they must rely on soil fertilization to have obvious effects. Therefore, in order to achieve the desired effect of fruit tree spray fertilizer, the following technical essentials must be mastered:
1. The choice of fertilizer. Mainly to supply the lack of medium and trace element fertilizers. Do not choose the so-called "Tenquan" large fluid, which is expensive and non-targeted, and the effect is not good. Therefore, it can be based on simple fertilizer. In view of the complexity of the micro-fertilizer market, when individual farmers purchase micro-fertilizers, they must choose a brand to buy good goods, and second, they must jointly purchase groups.
2. The concentration is suitable. If the concentration is too low, the effect will not be achieved. If it is too high, it will cause fertilizer damage. The optimum concentration will vary depending on the target crop, growth period and element type.
3. The number of spraying. Fruit tree spray fertilizer usually takes 2 shots to be effective. In case of special problems such as disasters or obvious symptoms, spray 3-5 times.
4. Spraying parts. The positive and the back of the leaves, stems and young fruits can be sprayed, but the spraying of flowers and buds should pay special attention to the concentration. Because the number of stomata on the back of the leaves is more than the front, the absorption will be more.
5, spraying time. Avoid wind, rain and noon time. It is advisable to go before 10 o'clock in the morning and after 4 o'clock in the evening.
Author: Zhang Yanhui
Source: Fujian Yongtai County Agriculture Bureau
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