Nutritional characteristics and fertilization techniques of pomegranate

Pomegranate is a pomegranate plant, which is a perennial deciduous shrub or small tree. Its fruit can be used for both medicine and food, and has high nutritional value. Pomegranate is cultivated all over the country due to its strong adaptability, drought resistance and heat resistance, resistance to salt and alkali, easy management and high yield. Rational fertilization is a key measure for the high yield and quality of pomegranate. 1 to 2 weeks after fruit picking, it is the second growth peak of pomegranate roots. At this time, there are many new roots, and the growth rate is fast. The cut roots are easy to heal and regenerate. The new white absorption roots can absorb some nutrients, which is beneficial to the trees after fruit picking. The potential restores and increases the nutrient reserve of the tree body. The fertilization is mainly based on the mature farmyard manure. The applied organic fertilizer is decomposed by soil microbes, which can be used for pomegranate flowering and germination in spring; spring is the important activity of pomegranate tree growth. During the period, root activity, germination, leaf spreading, branching, flower bud differentiation and buds were carried out successively. Fruit trees were mainly vegetatively grown. Spring topdressing should be based on high nitrogen compound fertilizer to promote new shoot growth; summer pomegranate flowering and fruit setting And fruit development, into reproductive growth, its growth center is the fruit, topdressing should use high-potassium compound fertilizer to promote the transport of nutrients to the fruit. According to the nutrient demand characteristics of pomegranate and multi-point demonstration results, the adult fruit tree with a target yield of 40 kg/plant adopts radial ditch or ring ditch Schontek high-nitrogen compound fertilizer 300 g/plant and organic fertilizer 10-20 kg in autumn. / strain, superphosphate 500 g / strain; in the spring bud germination, the application of Entek high-nitrogen compound fertilizer 700 g / strain, with the foliar spray of lion horse blue and Kangpu liquid boron, the purpose is to promote the growth of new shoots The germination and flowering are neat and tidy, and the fruit setting rate is improved. In the summer fruit expansion period, the Entek high potassium compound fertilizer 1000 g/plant, the red ox potassium sulfate 200 g/plant, and the lion-red safflower fertilizer are sprayed 2 to 3 times to meet the requirements. In this period, there are more potassium nutrient requirements and improve the coloration and flavor of pomegranate fruit; pomegranate is also sensitive to the lack of trace elements, and the corresponding foliar fertilizer should be sprayed in time to prevent it. In the young fruit stage, 2 to 3 times of Kangpu liquid calcium is continuously sprayed to prevent calcium deficiency leading to leaf wrinkles and cracking; lobular disease caused by zinc deficiency can be sprayed with Kangpu suspended zinc 2 to 3 times during the spring bud germination period. The control is carried out; when the pomegranate on the calcareous soil in the north is deficient in iron, the leaves are chlorotic and yellow, and the Kangpu iron fertilizer can be sprayed 2 to 3 times in the spring bud germination stage to correct.