Citrus root fertilization

The citrus root fertilization is to insert the roots of the plants into the fertilizer solution in the bag and directly receive the nutrition. This can increase the utilization of fertilizers and avoid loss of fertilizer due to sun and rain. In the case of similar consequences, the amount of fertilizer used in the citrus root fertilization method is 1/100-1/300 of the amount of fertilizer used in general fertilization, and 1/5-1/10 of the amount of fertilizer used for foliar application.

In recent years, many experiments and production practices have confirmed that the results of little or no fruit orange trees are rooted and fertilized, the tree potential is strengthened, the leaf curtain layer is enlarged, the leaves are enlarged, the leaf color turns green, and the yellowing mosaic phenomenon is significantly alleviated. The lack of fruit-bearing orange trees is rooted with fertilization, and the fruit setting rate and yield are significantly increased, generally increasing yield by 5%-8%. The way to control it is:

1, the root time. When the citrus flower buds are whitish to the first physiological fruit drop period, the micro-fertilizer is applied. After 3-7 days of the flowering, the kinetin or micro-fertilizer is combined with the hormone, and the results are good.

2, the root method. Use a concentration lower than foliar fertilization to avoid excessive concentration of roots and roots. Generally, the application concentration of boric acid is 0.05%-0.1%, and the concentration of cytokinin and gibberellin is 25/100 million-50/100,000; The total amount of fertilizer should not exceed 1/100 of the conventional fertilization amount, and should not exceed 1/5 of the foliar application amount. The plastic fertilizer liquid bag is 8 cm × 10 cm or 10 cm × 13 cm. 50-200 ml of fertilizer solution per bag. When holding, in the base of the canopy projection area about 30 cm, take a small root of the roots, insert it into the bag containing the fertilizer liquid, then gather the bag mouth, lightly kraft with kraft paper, do not tie it Too tight. Each bag is set in four directions in the southeast and northwest of the tree, and may be increased or decreased according to the size of the tree. The fertilizer liquid bag is placed in a small hole dug in the soil layer, covered with grass, leaves and fine soil to prevent the evaporation of the fertilizer liquid and the roots.