How to fertilize Schisandra chinensis? A detailed explanation of practical fertilization techniques

Building a successful Schisandra chinensis orchard makes scientific fertilization the key. Schisandra chinensis is a perennial plant, and after planting it must grow continuously for more than 10 years within a limited nutrient range. As the cultivation years increase, the nutrients in the soil gradually decrease, the underground creeping stems are widely distributed, the growth is vigorous, and nutrient consumption is high. Therefore, rational fertilization is very important for the growth of Schisandra chinensis. The fertilization method and amount should pay attention to the following aspects.

In the year Schisandra chinensis is transplanted, the root system is not well developed and the branches are thin and weak. In order to promote the seedlings and strive to bear fruit in the second year, 10 kg of urea per mu can be topdressed once in late May to meet the need for nitrogen fertilizer. The second topdressing is from late June to early July, applying 10 kg of urea, 15 kg of superphosphate, and 10 kg of potassium sulfate per mu. The method is to dig trenches 0.3 m deep and evenly apply the three fertilizers mixed into the soil. The third fertilization is in early to mid-September, applying 2500 kg of decomposed farmyard manure per mu to prepare for use in the following spring.

The first 2 topdressings should be combined with irrigation, while the third fertilization may not require irrigation, and soil should be covered after fertilization. Starting from the first year of transplanting, Schisandra chinensis must be fertilized every year. The fertilization methods and types are roughly the same, but the amount of fertilization afterward should be increased accordingly according to the degree of tree growth, and the fertilization timing should be based on growth and development characteristics. For example, from late May to early June is the flowering period of Schisandra chinensis and also the peak growth period of new shoots, from late June to early August is the fruit expansion period, and from late July to mid-August is the flower bud formation period and also the second peak growth period of new shoots. During these key periods, Schisandra chinensis has a particularly large demand for fertilizer, so topdressing should be carried out in time, and foliar fertilization, which takes effect quickly and has low cost, should also be adopted. In June, spray 0.5% urea 2 times, with an interval of 7-10 days each time; after July, spray 1-2 times of 0.3% potassium dihydrogen phosphate or plant amino acid liquid, 200-250 g per mu. Choose to spray in the early morning and evening, and avoid spraying during extreme heat and before rain. In addition, when spraying urea, pay attention to the biuret content not exceeding 0.5% to avoid damaging the leaves.