Fertilizer application amount and period of planting dragon fruit

Fertilization is an important link in comprehensive management. The full play of fertilizer efficiency is related to soil and water. Only good soil structure and physical and chemical properties can promote microbial activities to accelerate nutrient decomposition and promote root absorption. Fertilizer decomposition, nutrient absorption, operation, synthesis and utilization must be carried out with the participation of water, so fertilization must be combined with the effect of irrigation and fertilizer will be brought into full play. In addition, fertilization is an important measure to maintain soil fertility and meet the nutrient elements needed for the growth and development of fruit trees. the type, quantity, method and period of fertilization will affect the effect of fertilization. Scientific fertilization should be applied in production according to its nutritional characteristics and the situation of abundant and deficient nutrition. The flowering period of dragon fruit is long, and the nutrition consumption is high. Therefore, there is a great demand for fertilizer, especially in the high-yielding period, the management of fertilizer and water should be strengthened.

To determine the reasonable amount of fertilizer application, mainly from the consumption of the tree itself, the supply capacity of the soil and the utilization rate of fertilizer, it is more scientific; generally, the profit and loss of nutrition is judged by leaf nutrition analysis, and then adjusted by fertilization. The fertilizer of dragon fruit is mainly organic fertilizer, with a small amount of chemical fertilizer. In the part of farm manure, according to the proportion of chicken manure, pig manure and peanut bran at 1:2:7, the usage is about 9 cubic meters per 667m2 (according to soil fertility and seedling growth). In addition, nitrogen fertilizer and potassium dihydrogen phosphate should be applied as needed, and trace amounts should be added in case of element deficiency. The results show that the application of fertilizer in the most suitable period can reduce the times of fertilization and improve the utilization rate of fertilizer. In areas with high temperature and heavy rain, repeated thin application can improve the utilization rate of fertilizer. Pitaya can be fertilized three times a year in July, October and March of the following year, with cow manure compost 1.2 kg / plant and compound fertilizer 200 g / plant respectively. Foreign field experiments show that the application of nitrogen fertilizer generally has a continuous effect on increasing yield, while the effect of phosphate fertilizer on increasing yield is shown in the first two years, and potash fertilizer and trace elements (Bforce Cuprit Zn and mn) have a better effect on the increase of yield in the later stage. The recommended amount of fertilizer for high-quality and high-yield cultivation of dragon fruit is 80 kg / ha of nitrogen in the first year, 20 kg / ha of phosphorus pentoxide in the second and third years, and 10 kg / ha of potassium oxide and 5 kg of boron / ha in the third year. Copper, zinc and molybdenum each 10 kg / ha.