The concentration of spray fertilizer is generally 0.3% to 0.4%, potassium dihydrogen phosphate is 0.2% to 0.5%, potassium sulfate is 0.5%, superphosphate is 0.5% to 1%, borax is 0.1% to 0.2%, and zinc sulfate is used. 0.1% to 0.2%, manganese sulfate is 0.05% to 0.1%, and agricultural rare earth is 0.1%.
Mastering the time of spraying fertilizer During the shed period, due to the high humidity in the shed, the leaf surface is easy to accumulate water droplets. The spraying fertilizer must be carried out after the water droplets are evaporated. Generally, the spraying fertilizer is between 10 am and 4 pm. In the non-detention period, the general spray fertilizer is carried out from 8 am to 6 pm, but in the case of too high temperature, avoid the 10 am to 4 pm.
During the spraying period, foliar spraying is generally carried out in the pre-flowering stage, the flowering stage, the young fruit stage, and the foliar period. The spraying interval should be about 10 days. Generally, the micro-fertilizer is sprayed during the flowering period, and the fertilizer is sprayed during the fruit period.
Suitable temperature for spray fertilizer When the temperature is between 18 °C and 20 °C, the pores of the leaves are all open. At this time, foliar spray fertilizer is applied, which is beneficial to the absorption and transportation of the management elements and improve the utilization rate of the fertilizer.
Suitable spray fertilizer humidity The relative humidity of the air suitable for spray fertilizer is generally 50% to 80%.
When the growth of the fruit tree is weak, the leaf color is yellow, and the growth is slow, the plant is deficient in nitrogen. At this time, the nitrogen fertilizer should be mainly used, and the phosphorus and potassium fertilizer should be sprayed. When the tree grows strong, the leaves are green and the internodes are too long, the nitrogen is too rich. At this time, the fertilizer should be mainly phosphorus and potassium.
Spraying parts There are many leaf holes on the back of the leaves, and the fertilizer is easy to seep. The spray fertilizer should be mainly on the back of the leaves, preferably both front and back. (
Mastering the time of spraying fertilizer During the shed period, due to the high humidity in the shed, the leaf surface is easy to accumulate water droplets. The spraying fertilizer must be carried out after the water droplets are evaporated. Generally, the spraying fertilizer is between 10 am and 4 pm. In the non-detention period, the general spray fertilizer is carried out from 8 am to 6 pm, but in the case of too high temperature, avoid the 10 am to 4 pm.
During the spraying period, foliar spraying is generally carried out in the pre-flowering stage, the flowering stage, the young fruit stage, and the foliar period. The spraying interval should be about 10 days. Generally, the micro-fertilizer is sprayed during the flowering period, and the fertilizer is sprayed during the fruit period.
Suitable temperature for spray fertilizer When the temperature is between 18 °C and 20 °C, the pores of the leaves are all open. At this time, foliar spray fertilizer is applied, which is beneficial to the absorption and transportation of the management elements and improve the utilization rate of the fertilizer.
Suitable spray fertilizer humidity The relative humidity of the air suitable for spray fertilizer is generally 50% to 80%.
When the growth of the fruit tree is weak, the leaf color is yellow, and the growth is slow, the plant is deficient in nitrogen. At this time, the nitrogen fertilizer should be mainly used, and the phosphorus and potassium fertilizer should be sprayed. When the tree grows strong, the leaves are green and the internodes are too long, the nitrogen is too rich. At this time, the fertilizer should be mainly phosphorus and potassium.
Spraying parts There are many leaf holes on the back of the leaves, and the fertilizer is easy to seep. The spray fertilizer should be mainly on the back of the leaves, preferably both front and back. (
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