Foliar fertilization concentration should be suitable
2018-08-11 04:02:12
Foliar fertilization, also called top dressing, is a fertilization method that dissolves fertilizer in water and then sprays the liquid fertilizer on the leaves of the crop with a sprayer. After fertilization, the amount of leaf fertilizer attached to the plant is 30%-60% of the total amount of spraying, and the amount of crop absorption is 40%-80% of the amount of adhesion. Pay attention to the following points when applying foliar fertilizer:
1, preferably after 3 pm to evening (depending on the specific circumstances). At this time, the temperature is low and the humidity is high, which is favorable for the blade to absorb.
2, both sides of the blade should be sprayed, especially the vegetable leaves with more pores, the back should be sprayed, because the back of the leaf is more than 1 times higher than the front.
3. Adding urea when spraying trace elements can increase the absorption rate of crops and prevent temporary yellowing of crops.
4, can be mixed with pesticide spraying. This can not only prevent pests and diseases, but also achieve the purpose of fertilization, but it should be noted that phosphorus-containing fertilizers generally cannot be mixed with pesticides containing lime.
5, spray concentration should be appropriate. The effect of low concentration is not good, and it is easy to produce fat damage. The quality of the fertilizer applied is better. For example, when the biuret content in urea exceeds 2%, foliar spray fertilizer is susceptible to poisoning.
6. The demand of nitrogen fertilizer in leafy vegetables is high at each growth stage, and the fertilization of leaf surface should be based on nitrogen fertilizer; the nitrogen, phosphorus and potassium should be balanced in fruit and vegetable, and the mixture of nitrogen, phosphorus and potassium should be used in foliar fertilization; The vegetables of bulbs and bulbs responded well to phosphorus and potassium fertilizers, and the fertilization of foliage should be mainly phosphorus and potassium.
7. The fertilizer should be fully dissolved and mixed with water before spraying. For example, when applying superphosphate, the superphosphate should be stirred with hot water, and after 24 hours, the supernatant is taken to a concentration of 3% and then sprayed.
1, preferably after 3 pm to evening (depending on the specific circumstances). At this time, the temperature is low and the humidity is high, which is favorable for the blade to absorb.
2, both sides of the blade should be sprayed, especially the vegetable leaves with more pores, the back should be sprayed, because the back of the leaf is more than 1 times higher than the front.
3. Adding urea when spraying trace elements can increase the absorption rate of crops and prevent temporary yellowing of crops.
4, can be mixed with pesticide spraying. This can not only prevent pests and diseases, but also achieve the purpose of fertilization, but it should be noted that phosphorus-containing fertilizers generally cannot be mixed with pesticides containing lime.
5, spray concentration should be appropriate. The effect of low concentration is not good, and it is easy to produce fat damage. The quality of the fertilizer applied is better. For example, when the biuret content in urea exceeds 2%, foliar spray fertilizer is susceptible to poisoning.
6. The demand of nitrogen fertilizer in leafy vegetables is high at each growth stage, and the fertilization of leaf surface should be based on nitrogen fertilizer; the nitrogen, phosphorus and potassium should be balanced in fruit and vegetable, and the mixture of nitrogen, phosphorus and potassium should be used in foliar fertilization; The vegetables of bulbs and bulbs responded well to phosphorus and potassium fertilizers, and the fertilization of foliage should be mainly phosphorus and potassium.
7. The fertilizer should be fully dissolved and mixed with water before spraying. For example, when applying superphosphate, the superphosphate should be stirred with hot water, and after 24 hours, the supernatant is taken to a concentration of 3% and then sprayed.
ã€Comment】 ã€Print this article】 ã€Close this page】 ã€Large, medium and small】
Plastic Fastener is used for corrossive environment, for different application, RMI PLAST offer PVC, PVDF, PP, PA6 materials, it is widely used for equipment and pipes which will touch corrossive liquid. But the weekness of Plastic Bolt and nuts is it not have strong strength. and high working temperature.
Ningbo RMI Plastic Co.,Ltd offer plastic bolt and nuts with specification:
Size:M3~M20
Material: PVC,PP,PVDF,Nylon
Nylon Nut,Nylon Bolt,PA6 Bolt,Plastic Bolt
Ningbo RMI Plastic Co., Ltd. , http://www.rmiplast.com