At this stage in May and June, it is necessary not only to provide fruit trees with a large amount of nutrients such as potassium and phosphorus, but also to prevent the deficiency of trace elements such as calcium, magnesium, iron, zinc and boron. At the same time, it is necessary to promote the expansion and development of fruits, evenly color them, and improve the sugar content and taste by spraying functional fertilizers on the leaves and controlling watering.

Let's talk specifically about the methods to make the fruit of Myrica rubra bigger:

1. Potassium supplement

Operation method: For the fruit trees with strong growth and big fruit, 1 kg of potassium sulfate +.5 kg of diammonium phosphate can be topdressing each tree, and for the fruits with weak growth and small fruit size, 1 kg of potassium sulfate +.5 kg of diammonium phosphate +.2 kg of nitrogen fertilizer can be topdressing each tree; Or spraying .3-.4% potassium dihydrogen phosphate+.3-.5% urea solution continuously for 3-4 times and once every 7-1 days according to the situation of fruit trees.

2. calcium supplementation

operation method: 1, times of calcium nitrate solution or calcium chelate can be sprayed once every 7-1 days, especially on the calyx depression of the fruit, and sprayed twice in succession.

3. magnesium supplementation

operation method: magnesium sulfate can be sprayed on the leaves. Ordinary fruit trees or fruit trees with light magnesium deficiency can be sprayed with 1-2% magnesium sulfate once or twice, and fruit trees with serious magnesium deficiency can be supplemented with 1.5 kg of magnesium sulfate per mu for root fertilization.

4. Supplementing boron and zinc

Operation method: For the fruit trees lacking boron and zinc, .1-.3% borax and .3-.4% zinc sulfate can be sprayed according to the tree situation.