General characteristics of fertilization of Schisandra chinensis?

Unlike field crops or vegetable crops, schisandra chinensis is a vine with long growth cycle. In its whole life cycle, all kinds of seedlings undergo the process of growth, fruiting, renewal and senescence. But in the annual cycle, there are germination, shoot, flowering, fruiting, maturity and dormancy. In different growth stages, the nutritional characteristics of various seedlings are different, but compared with field crops or vegetable crops, schisandra chinensis has the following nutritional characteristics:

In order to meet the needs of the growth and development of its aboveground and underground parts and to provide a large number of fruits every year, seedlings absorb a large amount of nutrients from the soil every year, especially adult seedlings.

(2) Continuous consumption of nutrients The growth cycle of Schizandra chinensis is long, and generally the same plant will continue to grow for more than ten years on the same plot. Because of its fixed position and continuous absorption of nutrients, schisandra often causes excessive consumption of some nutrients in the soil. Therefore, timely replenishment through fertilization is essential. Otherwise, deficiency of some trace elements (such as Fe, B, Zn) will occur and affect fruit yield and quality. A large amount of bio-organic fertilizer should be applied properly in the garden of schisandra chinensis, which is suitable for the agrochemical characteristics of specific soil and the needs of schisandra chinensis seedlings for trace elements.

(3) It needs to store nutrients before winter. In its roots, branches and stems, it stores a large number of nutrients, including nitrogen compounds and various mineral elements in addition to carbohydrates. Seedling germination, flowering and growth in early spring mainly consume nutrients stored in trees. Therefore, after fruit harvest to deciduous before, generally should be applied early base fertilizer, mainly organic fertilizer, combined with the application of part of nitrogen, phosphorus and potassium fertilizer, so that the rich nutrients stored in the tree for the next early spring use, to improve flowering and fruit setting rate, promote the healthy growth of branches, fruit hypertrophy and yield, have a certain role. Early application of basal fertilizer is also beneficial to overcome the phenomenon of fruit bearing in big and small years.

(4) The ability to absorb deep nutrients must pay attention to this characteristic when fertilizing seedlings. At the same time, the seedling root system is not developed, and the vertical absorption capacity of the stem is strong, and the adaptability to external environmental conditions is stronger than that of field crops or vegetable crops. Adult seedlings, in particular, can absorb certain nutrients from the lower soil to supplement the deficiency of nutrients in the upper soil. When fertilizing fruit trees, not only the surface soil, but also the soil nutrition status of a large number of root distribution layers should be considered. Fertilizer should be applied to a certain depth to facilitate the growth and rooting of Schizandra chinensis roots, which is conducive to root absorption and improvement of fertilizer utilization rate and survival and yield efficiency.

(5) Nutritional characteristics of annual cycle Seedlings are perennial crops. The nutritional characteristics of annual cycle are as follows: nitrogen requirement is the most in the early stage of growth (germination, flowering and rapid growth of branches and leaves), and then the requirement begins to decrease, and a certain amount of nitrogen is still required after fruit harvest; phosphorus content increases somewhat in the growth period, but the requirement changes little until the late stage; potassium content is more in the early stage of growth, and potassium absorption peaks in the middle stage of growth.