Foliar fertilizer correctly masters the use of technical foliar fertilizer. In a strict sense, it is not a classification of fertilizer, but a fertilization method. As we all know, in addition to the nutrients absorbed by the roots, the leaves can also absorb nutrients. Foliar fertilization is also called top dressing or foliar spray. This type of fertilization is a fertilization method often used in production. According to statistics, in foreign countries, the proportion of fertilizer applied through foliar application has exceeded 40%, and the importance of foliar fertilization can be seen. The prominent feature of foliarfeeding/spray is that it is highly targeted, and the nutrient absorption is fast. It can avoid the fixation of soil to certain nutrients, improve nutrient utilization, and has less fertilization. It is suitable for the application of micro-fertilizer and increase production. The effect is remarkable, especially when the soil environment is poor, the water is too much or the drought and low humidity conditions, the soil is over-acid and the alkalinity causes the root absorption to be hindered or the crop deficiency is urgently needed to supplement the nutrients, and the root absorption capacity declines in the late crop growth period, the leaf top dressing is adopted. It can make up for the lack of root system and can achieve better yield increase.
1. Correct understanding and use of foliar fertilizer
1.1 There are many kinds of foliar fertilizers, and there are hundreds of species and even thousands of species in the country. According to its function and function, foliar fertilizer can be summarized into the following five categories:
Category 1: Nutritional Foliar Fertilizer This type of foliar fertilizer contains not only a large amount of elements nitrogen, phosphorus and potassium, but also contains medium-level elements such as calcium, iron, magnesium and trace elements necessary for crops. It is to provide various nutrients for crops and improve the nutritional status of crops, especially for the supplement of various nutrients in the late stage of crop growth. Such as Finland's Kemira company's Fei Kai Wang series foliar fertilizer.
Class 2: Regulated foliar fertilizer (not strictly in the fertilizer category) This type of foliar fertilizer contains substances that regulate plant growth, such as auxin, chlormequats, etc. The main function is to regulate the growth of crops. Development and so on. Suitable for pre- and post-plant growth. Such as 920, love more than income.
Category 3: Biofoliar Fertilizers These fertilizers contain microorganisms and metabolites such as amino acids, nucleotides, and nucleic acids. The main function is to stimulate crop growth, promote crop metabolism, reduce and prevent the occurrence of pests and diseases.
Class 4: Single-type trace element foliar fertilizer This type of foliar fertilizer contains only one trace element necessary for crops, and is used for the needs of certain crops for special trace elements, such as spraying borax or boric acid in rapeseed, fruit trees. Spray zinc sulfate on the top.
Category 5: Compound Foliar Fertilizer There are many types of foliar fertilizers, and there are various combinations of foliar fertilizers. Its functions are various, a foliar fertilizer can provide nutrition, and can stimulate growth regulation and development.
1.2 Correctly master the use of foliar fertilizer technology
The effect of foliar fertilization is often restricted and influenced by many factors. To improve the effect of foliar fertilization, scientific fertilization methods and correct fertilization techniques should be adopted.
1.2.1 Choosing the right fertilizer variety Select the appropriate foliar fertilizer variety according to the growth and nutrition of the crop. In the early stage of crop growth, in order to promote the growth and development of the selected type of foliar fertilizer, if the crop is lack of nutrients or the root absorption capacity declines in the late growth stage, nutritive foliar fertilizer should be used. The fertilizers commonly used in foliar application in production are mainly urea, potassium dihydrogen phosphate, superphosphate, potassium sulfate and various trace element fertilizers. The appropriate fertilizer varieties can be selected according to the specific conditions.
1.2.2 The concentration of spraying should be within a certain concentration range. The speed and quantity of nutrients entering the leaves increase with the increase of the concentration of the solution, but the concentration is too high, and the fertilizer is harmful, especially the trace element fertilizer, crop nutrition. The critical range from lack to excess is narrow and should be strictly controlled. Foliar fertilizers containing growth regulators should also be sprayed strictly according to the concentration requirements to prevent improper control. Different crops have different concentration requirements for different fertilizers. Taking urea as an example, the suitable concentration in grass, wheat and other grass crops is 1.5%-2.0%, and in radish, cabbage, cabbage, cucumber, 1%-1.5%, in potato, watermelon, The concentration of eggplant is 0.5%-0.8%, the concentration of apple, pear, grape and tea is 0.5%, and the concentration of onion, tomato and greenhouse cucumber is 0.2%-0.3%.
1.2.3 spraying time should be suitable for foliar fertilization. The amount of nutrients absorbed by the leaves is related to the length of the solution wetted leaves. The longer the wetting time, the more nutrients are absorbed by the leaves; the better the effect. Under normal circumstances, it is advisable to keep the blade wet time in 30~60 minutes. Therefore, foliar fertilization is best carried out in the windless weather in the evening; spraying fertilizer in the morning with dew will reduce the concentration of the solution and affect the effect of fertilization. Foliar topdressing can not be carried out on rainy days or before rain, because nutrients are easily leached and cannot function as they should. If it rains 3 hours after spraying, it should be sprayed once a day on sunny days, but the concentration should be appropriately reduced.
1.2.4 Spraying should be even and meticulous. Foliage fertilization requires fine droplets and uniform spraying. Pay special attention to spraying the upper leaves and the back of the leaves, because the new leaves are more nutrient than the old leaves. The speed is fast and the absorption capacity is strong. Especially for peaches, pears, persimmons, apples and other fruit trees, the front of the stratum corneum is 3-4 times thicker than the back, and more attention should be paid to spraying the back of the leaves for absorption. Therefore, when fertilizing the leaves, the front and back sides of the leaves should be sprayed as carefully as possible.
1.2.5 The number of spraying should not be too small. The concentration of leaf top dressing should be low, and the amount of absorption per time is very small, which is much lower than the demand of crops. Therefore, the number of foliar application should generally not be less than two or three times. As for nutrients (such as iron, boron, calcium, phosphorus, etc.) that have little or no movement in the crop, it is necessary to pay attention to the appropriate increase in the number of sprays. When spraying foliar fertilizer containing conditioner, it should be noted that there should be intervals between spraying, the interval should be at least 1 week, and the number of spraying should not be too much to prevent improper regulation and damage.
1.2.6 Foliar fertilizer should be used when foliar topdressing is used, and two or more kinds of foliar fertilizers can be mixed reasonably, which can save spraying time and labor, and the yield increasing effect will be more significant. However, after the fertilizer is mixed, there must be no adverse reactions or no reduction in fertilizer efficiency, otherwise the purpose of mixing will not be achieved. In addition, the concentration of the solution and the pH should be paid attention to when mixing the fertilizer. Under normal circumstances, the pH value of the solution is about 7 and the neutral condition is favorable for the leaf absorption.
1.2.7 Adding a wetting agent to the fertilizer solution There is a layer of thick and thin stratum corneum on the leaves of the crop. It is difficult to infiltrate the solution. For this reason, an appropriate amount of wetting agent, such as neutral soap, can be added to the leaf fertilizer solution. A good quality detergent, etc., to reduce the surface tension of the solution, increase the contact area with the blade, and improve the effect of foliar topdressing.
When purchasing foliar fertilizer, attention should be paid to the type and function of the foliar fertilizer indicated in the package, so that the purpose of foliar fertilization is consistent with the function of foliar fertilizer; it should also be noted whether the product has a foliar fertilizer registration certificate issued by the Ministry of Agriculture. No. and product standard certificate number to ensure the quality and application effect of foliar fertilizer.
1. Correct understanding and use of foliar fertilizer
1.1 There are many kinds of foliar fertilizers, and there are hundreds of species and even thousands of species in the country. According to its function and function, foliar fertilizer can be summarized into the following five categories:
Category 1: Nutritional Foliar Fertilizer This type of foliar fertilizer contains not only a large amount of elements nitrogen, phosphorus and potassium, but also contains medium-level elements such as calcium, iron, magnesium and trace elements necessary for crops. It is to provide various nutrients for crops and improve the nutritional status of crops, especially for the supplement of various nutrients in the late stage of crop growth. Such as Finland's Kemira company's Fei Kai Wang series foliar fertilizer.
Class 2: Regulated foliar fertilizer (not strictly in the fertilizer category) This type of foliar fertilizer contains substances that regulate plant growth, such as auxin, chlormequats, etc. The main function is to regulate the growth of crops. Development and so on. Suitable for pre- and post-plant growth. Such as 920, love more than income.
Category 3: Biofoliar Fertilizers These fertilizers contain microorganisms and metabolites such as amino acids, nucleotides, and nucleic acids. The main function is to stimulate crop growth, promote crop metabolism, reduce and prevent the occurrence of pests and diseases.
Class 4: Single-type trace element foliar fertilizer This type of foliar fertilizer contains only one trace element necessary for crops, and is used for the needs of certain crops for special trace elements, such as spraying borax or boric acid in rapeseed, fruit trees. Spray zinc sulfate on the top.
Category 5: Compound Foliar Fertilizer There are many types of foliar fertilizers, and there are various combinations of foliar fertilizers. Its functions are various, a foliar fertilizer can provide nutrition, and can stimulate growth regulation and development.
1.2 Correctly master the use of foliar fertilizer technology
The effect of foliar fertilization is often restricted and influenced by many factors. To improve the effect of foliar fertilization, scientific fertilization methods and correct fertilization techniques should be adopted.
1.2.1 Choosing the right fertilizer variety Select the appropriate foliar fertilizer variety according to the growth and nutrition of the crop. In the early stage of crop growth, in order to promote the growth and development of the selected type of foliar fertilizer, if the crop is lack of nutrients or the root absorption capacity declines in the late growth stage, nutritive foliar fertilizer should be used. The fertilizers commonly used in foliar application in production are mainly urea, potassium dihydrogen phosphate, superphosphate, potassium sulfate and various trace element fertilizers. The appropriate fertilizer varieties can be selected according to the specific conditions.
1.2.2 The concentration of spraying should be within a certain concentration range. The speed and quantity of nutrients entering the leaves increase with the increase of the concentration of the solution, but the concentration is too high, and the fertilizer is harmful, especially the trace element fertilizer, crop nutrition. The critical range from lack to excess is narrow and should be strictly controlled. Foliar fertilizers containing growth regulators should also be sprayed strictly according to the concentration requirements to prevent improper control. Different crops have different concentration requirements for different fertilizers. Taking urea as an example, the suitable concentration in grass, wheat and other grass crops is 1.5%-2.0%, and in radish, cabbage, cabbage, cucumber, 1%-1.5%, in potato, watermelon, The concentration of eggplant is 0.5%-0.8%, the concentration of apple, pear, grape and tea is 0.5%, and the concentration of onion, tomato and greenhouse cucumber is 0.2%-0.3%.
1.2.3 spraying time should be suitable for foliar fertilization. The amount of nutrients absorbed by the leaves is related to the length of the solution wetted leaves. The longer the wetting time, the more nutrients are absorbed by the leaves; the better the effect. Under normal circumstances, it is advisable to keep the blade wet time in 30~60 minutes. Therefore, foliar fertilization is best carried out in the windless weather in the evening; spraying fertilizer in the morning with dew will reduce the concentration of the solution and affect the effect of fertilization. Foliar topdressing can not be carried out on rainy days or before rain, because nutrients are easily leached and cannot function as they should. If it rains 3 hours after spraying, it should be sprayed once a day on sunny days, but the concentration should be appropriately reduced.
1.2.4 Spraying should be even and meticulous. Foliage fertilization requires fine droplets and uniform spraying. Pay special attention to spraying the upper leaves and the back of the leaves, because the new leaves are more nutrient than the old leaves. The speed is fast and the absorption capacity is strong. Especially for peaches, pears, persimmons, apples and other fruit trees, the front of the stratum corneum is 3-4 times thicker than the back, and more attention should be paid to spraying the back of the leaves for absorption. Therefore, when fertilizing the leaves, the front and back sides of the leaves should be sprayed as carefully as possible.
1.2.5 The number of spraying should not be too small. The concentration of leaf top dressing should be low, and the amount of absorption per time is very small, which is much lower than the demand of crops. Therefore, the number of foliar application should generally not be less than two or three times. As for nutrients (such as iron, boron, calcium, phosphorus, etc.) that have little or no movement in the crop, it is necessary to pay attention to the appropriate increase in the number of sprays. When spraying foliar fertilizer containing conditioner, it should be noted that there should be intervals between spraying, the interval should be at least 1 week, and the number of spraying should not be too much to prevent improper regulation and damage.
1.2.6 Foliar fertilizer should be used when foliar topdressing is used, and two or more kinds of foliar fertilizers can be mixed reasonably, which can save spraying time and labor, and the yield increasing effect will be more significant. However, after the fertilizer is mixed, there must be no adverse reactions or no reduction in fertilizer efficiency, otherwise the purpose of mixing will not be achieved. In addition, the concentration of the solution and the pH should be paid attention to when mixing the fertilizer. Under normal circumstances, the pH value of the solution is about 7 and the neutral condition is favorable for the leaf absorption.
1.2.7 Adding a wetting agent to the fertilizer solution There is a layer of thick and thin stratum corneum on the leaves of the crop. It is difficult to infiltrate the solution. For this reason, an appropriate amount of wetting agent, such as neutral soap, can be added to the leaf fertilizer solution. A good quality detergent, etc., to reduce the surface tension of the solution, increase the contact area with the blade, and improve the effect of foliar topdressing.
When purchasing foliar fertilizer, attention should be paid to the type and function of the foliar fertilizer indicated in the package, so that the purpose of foliar fertilization is consistent with the function of foliar fertilizer; it should also be noted whether the product has a foliar fertilizer registration certificate issued by the Ministry of Agriculture. No. and product standard certificate number to ensure the quality and application effect of foliar fertilizer.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Machines For Finishing Banners
Machines For Finishing Banners,Welding Shop Banner,Banner Edge Welder,Banner Spot Welder
NINGBO ZONGLAN MECHANICAL AND ELECTRICAL EQUIPMENT MANUFACTURE CO., LTD , https://www.zonglaneyelet.com