Foliar spray fertilizer is widely used as a quick-acting topdressing method, but the fertilizer effect time is short, which can not be used as the main topdressing method in crop growth period, and can only be used as an auxiliary means. The following conditions can be used for foliar topdressing:
1. When the crop is deficient, the foliar fertilization is used, which has higher utilization rate than the soil topdressing fertilizer, and the effect is obvious.
2. The root system is aging in the late stage of crop growth, and the method of foliar topdressing should be used when the absorption capacity declines.
3, the soil environment is not conducive to crop growth, such as excessive or too little drought, soil over-acid or over-alkali, foliar spray fertilizer, can quickly supplement nutrition to meet the needs of growth and development.
4, the application of trace elements, should use foliar spray fertilizer.
5, the use of soil topdressing is difficult to carry out, such as crops covered by plastic film, in the case of insufficient application of base fertilizer, at this time should use foliar spray fertilizer to supplement nutrient needs.
Huaxian County Shang Hongyan
1. When the crop is deficient, the foliar fertilization is used, which has higher utilization rate than the soil topdressing fertilizer, and the effect is obvious.
2. The root system is aging in the late stage of crop growth, and the method of foliar topdressing should be used when the absorption capacity declines.
3, the soil environment is not conducive to crop growth, such as excessive or too little drought, soil over-acid or over-alkali, foliar spray fertilizer, can quickly supplement nutrition to meet the needs of growth and development.
4, the application of trace elements, should use foliar spray fertilizer.
5, the use of soil topdressing is difficult to carry out, such as crops covered by plastic film, in the case of insufficient application of base fertilizer, at this time should use foliar spray fertilizer to supplement nutrient needs.
Huaxian County Shang Hongyan
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