Honey pomelo spring management measures

The grapefruit planted in Wuhua County is native to Fujian and matured before and after the Mid-Autumn Festival. Production test shows that it has strong adaptability, easy cultivation, early results, high yield and stable production, and has a good market prospect. Now its spring management technology is introduced as follows.

First, fertilizing honey pomelo pumping leaves and flowering are both in the same period, and requires a lot of nutrition, so pay attention to fertilization can ensure the need for the growth of pomelo tree. The results can be applied to the tree 0.75 kg of ammonium carbonate mixed 0.75 kg of superphosphate, ammonium sulfate 0.15 kg; or Shimi grapefruit special fertilizer 0.5 kg plus urea 0.1 kg. Young trees are treated with a small amount of ammonium bicarbonate plus superphosphate or buried. Pay attention to the fertilizer before flowering. Apply 10 to 15 days before flowering to make a chemical fertilizer based on available nitrogen fertilizer. In order to make a strong flower, the tree producing 50 kilograms can use calcium nitrate or ammonium nitrate 0.5 kilograms, or honey pomelo Fertilizer 0.5 kg. At the same time, in combination with the roots outside the fertilization, before the flower is added to the 50 kg of water plus 100-150 grams of imported urea, ammonium molybdate 25 grams, 100 grams of potassium chloride, 200 grams of magnesium sulfate, flower and fruit nutrition solution 130-150 ml spraying. Spray every 5-7 days. During the flowering period, 50 grams of boric acid and 25 grams of ammonium molybdate were used to spray 50 kilograms of water, spraying once every 5-7 days for 2-3 consecutive times. Hua Xie 2/3 after the use of flower nutrient solution 150 liters, 200 grams of magnesium sulfate, 100 grams of potassium dihydrogen phosphate, 150 grams of imported urea 150 grams of water sprayed. After Xiehua 7-10 days, it is appropriate to spray 90% fruit, plus 1 gram of 90% for every 50 kilograms of water.

Second, pay attention to spring cut as much as possible to put spring shoots, pruning can be appropriate to remove the top of the crown and the periphery of dense spring shoots. The spring tip of the top can be cut 1/3-2/3 of the amount of spring shoots of the year so as to ease the growth potential, reduce the degree of competition for the nutrition of the tree, and improve the quality of flowers.

Third, thinning and sparse fruit thinning remove weak flowers, deformed flowers, spend a lot of trees to carry out sparsely. At the same time, sparse buds, with 2-4 robust buds per panicle, 80-120 robust spikes per plant. Thinning fruit is carried out after the second physiological fruit drop, removing weak deformity.

Fourth, the ring cut fruit fruit flower Xie half when the results of the branch spiral ring cut 2-3 ring, increase nutrient accumulation, improve the fruit rate.

V. Pest control The major pests and diseases during the flowering period are anthracnose, scab, buds, and roundworms. The disease prevention and control is carried out when the spring shoots are 2 centimeters long. The medicine is made of copper soap, thiophanate, carbendazim, and copper bacteria. Pest control: The flower buds spread the "1650" powder before the flower buds are dew-white, or combine the control of locusts, leaf insects, and red spiders before and after flowering, and spraying water-containing phosphoramidites, dichlorvos, trichlorfon, etc. .

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