Fertilization technique of Schisandra chinensis

Scientific fertilization is the key to build a successful Schisandra chinensis garden. Schisandra chinensis is a perennial plant, which has to grow continuously within a limited range of nutrients for more than 10 years after planting. With the extension of cultivation years, the nutrition in the soil will gradually decrease, the distribution of underground transverse stems is huge, the growth is exuberant, and the nutrition consumption is more, so reasonable fertilization is very important for the growth of Schisandra chinensis. The methods and dosage of fertilization should pay attention to the following aspects.

In the year when Schisandra chinensis was transplanted, the root system was underdeveloped and the branches were weak. In order to promote seedlings and strive for fruit in the second year, urea can be applied once in late May, 10 kg per mu, to meet the need for nitrogen fertilizer. The second topdressing was from late June to early July, with 10 kg urea, 15 kg superphosphate and 10 kg potassium sulfate per mu. The method was to mix the three fertilizers evenly into the soil at a depth of 0.3 meters. The third fertilization was in the first and middle of September, and 2500 kg of mature farm manure was applied per mu for use in the following spring.

The first two times of topdressing should be combined with irrigation, the third fertilization should not be irrigated, and the soil should be covered after fertilization. Schisandra chinensis should be fertilized every year from the first year of transplanting, and the fertilization methods and types are roughly the same, but the amount of fertilizer should be increased according to the growth degree of the tree, and the fertilization period should be carried out according to the characteristics of growth and development. For example, from late May to early June, Schisandra chinensis flowering is also the peak period of new shoot growth, late June to early August is the fruit expansion period, late July to mid-August is the flower bud formation period, and it is also the second peak period of new shoot growth. In these critical periods, Schisandra needs a large amount of fertilizer, so it is necessary to topdressing in time, and foliar fertilization with quick effect and low cost should be adopted at the same time. 0.5% urea was sprayed twice in June, each time at an interval of 7-10 days; after July, 0.3% potassium dihydrogen phosphate or plant amino acid solution was sprayed 1-2 times, 200-250 grams per mu. Choose to spray in the morning and evening to avoid spraying before heat and rain. In addition, spraying urea should pay attention to that the biuret content is not more than 0.5%, so as not to damage the leaves.