Do you know the point of attention in the orchard foliar dressing?

- Mar 28, 2018-

When the fruit trees in the orchard spray fertilizing materials, they need to focus not only on the whole tree, but also on each leaf and soil. When applying it, do you know what to look out for? How to use it properly?

    Spraying fertilizer concentration is generally 0.3% to 0.4% for urea, 0.2% to 0.5% for potassium dihydrogen phosphate, 0.5% for potassium sulfate, 0.5% to 1% for superphosphate, 0.1% to 0.2% for borax, and zinc sulfate for zinc sulfate. 0.1% to 0.2%, manganese sulfate is 0.05% to 0.1%, and agricultural rare earth is 0.1%.

    Grasp the time of spraying the fertilizer in the shed period, due to the humidity in the shed, the leaves tend to accumulate into drops of water, and the fertilizer must be evaporated after the drips. Spraying is usually between 10 am and 4 pm. In the non-studded period, spray fertilizer is generally performed from 8 am to 6 pm. However, in the case of excessive temperatures, avoid 10:00 am to 4:00 pm.

    During the period of fertilizer spraying, foliar spray fertilizer is usually applied during the early flowering stage, flowering stage, young fruit stage, and leaf nutrient stage. Each spraying interval should be about 10 days. The application of micro-fertilizer is usually applied during the flowering period and the fertilizer is sprayed during the fruiting period.

Appropriate spray fertilizer humidity suitable for spray fertilizer air relative humidity is generally 50% to 80%.

Seedlings growing condition Spray fertilizer When the tree grows weaker, leaves yellowish, and grows slowly, it is plant nitrogen deficiency. At this time should be mainly nitrogen fertilizer, with the application of phosphorus, potash fertilizer. When the tree grows stronger, the leaves are greener, and the internodes are too long, the nitrogen is too abundant. At this time, the spray fertilizer should be dominated by phosphorus and potash fertilizers.

    There are more leaf holes on the back of the spraying part of the leaves, and the fertilizer is easy to infiltrate. The spray fertilizer should be mainly on the back of the leaf, and it is better to take both positive and negative sides into consideration.