Cherry fertilizer requirement and fertilization method

　 1. Fertilizer characteristics of cherries: Cherry is the earliest ripe fruit in the northern fruit trees, and has the reputation of “the treasure of fruit” and the “first branch of spring fruit”. From cherry leaf, pumping a little, flowering and fruit development to maturity are set only requires a period of about 45 days in the first half of the growing season from flowering to mature fruit, flower bud differentiation and again after harvest 1 to 2 It is basically completed within a month, so the cherry has the characteristics of rapid growth and concentration and fertilizer concentration . The amount of fertilizer required from the leaf to the ripening of the fruit in the year is high. After the fruit picking, the amount of fertilizer required for the flower bud differentiation is second, and the rest of the time requires less fertilizer. In the production, we must pay attention to winter, flowering and post-harvest fertilization, which is an important measure to improve production and improve quality.

　　 2 , cherry fertilization technology: cherry tree growth period of fertilizer application of nitrogen fertilizer ( N ) 13-15 kg, phosphate fertilizer ( P2O5 ) 5-7 kg, potassium fertilizer (K2O) 7-9 kg. Fertilization should be based on organic fertilizers, and organic and inorganic fertilizers should be mixed best. If pure organic manure as fertilizer cultivation mu 3000-4000 kg (1200-1500 kg organic fertilizer products); organic and inorganic fertilizers combined cultivation, amount of fertilizer organic fertilizer mu manure 1500-2000 kg (commercial organic fertilizer 600-750 kg), 12 kg of urea, diammonium phosphate 6 kg, 5 kg potassium sulfate.

(1) Fall Fertilizers: Fertilizers usually after the fruit harvest, preferably slightly autumn stop growing, that is between the early late August to September, we should adhere to basal administration principles of organic and chemical fertilizers. Pure organic fertilizer cultivated orchard base fertilizer accounted for 70% , topdressing accounted for 30% , and the amount of fertilizer applied was 2100-2800 kg of farmyard manure (commodity organic fertilizer 840-1050 kg). For the combination of organic and inorganic orchard, organic fertilizer and diammonium phosphate are all used as base fertilizer, nitrogen fertilizer and potassium fertilizer base fertilizer account for 30% , topdressing fertilizer accounts for 70% , and organic fertilizer fertilization amount is farmer fertilizer 1500-2000 kg (commercial organic fertilizer 600- 750 kg), 3.6 kg of urea , 6 kg of diammonium phosphate and 1.5 kg of potassium sulfate .

(2) fertilization flowering: flowering cherry fruit set higher requirements for nutrition, flowering bud is needed is storage of nutrients, mainly by fruit nutrition of the year, therefore, early flowering nitrogen fertilizer to promote flowering and fruiting branches Growth has a significant effect. Pure organic cultivation facilities available organic fertilizer may be 225-300 kg; combination of organic and inorganic cultivation may Mushi 6 kg of urea, 2.5 kg potassium sulfate, 50% of the amount of fertilizer applied fertilizer may be total.

( 3 ) Fertilization after fruit picking: After about 10 days after picking the fruit, the cherry seeds begin to differentiate into a large number of flower buds, which is the time when the new growth stops. And this was a very critical fertilizer, has an important role in increasing the nutrient accumulation, promote differentiation, maintain robust growth vigor. Pure organic cultivation can apply 225-300 kg of quick-acting organic fertilizer ; combined with organic and inorganic cultivation, it can apply 2.4 kg of urea and 1 kg of potassium sulfate , and the amount of fertilizer can account for 20% of total fertilization .