A kind of fertilizer specially used for continuous cropping of platycodon grandiflorum

Abstract

The invention discloses a fertilizer special for continuous cropping of plantycodon grandiflorum. The fertilizer comprises a base fertilizer and an additional fertilizer. The base fertilizer combines controlled-release urea with conventional urea to regulate nitrogen supply of soil, so that nutrient supply in the whole growth period coincides with the nutrient needs of plantycodon grandiflorum. Potassium humate and potassium sulfate are employed to replace the traditional 100% potassium sulfate base fertilizer, the organic matter content of soil can be increased, and the soil is improved. Also potassium humate has slow-release effect, combined application of potassium humate and potassium sulfate can reach complementation of rapidly available potassium and slowly available potassium, thus enhancing the utilization efficiency of potassium. At the same time, the fertilizer can supplement trace elements copper, iron, manganese, calcium and zinc, adjust soil trace element imbalance caused by continuous cropping, and restore soil nutrient balance, thus being more suitable for continuous cropping planting of plantycodon grandiflorum.

Description

technical field [0001] The invention relates to the technical field of traditional Chinese medicine planting, and relates to a special fertilizer for continuous cropping of Platycodon grandiflorum. Background technique [0002] Campanulaceae (plantycodon grandiflorum (Jcaq.) A.DC) is a perennial herbaceous plant of Campanulaceae. It is an important edible, medicinal, ornamental and multi-purpose economic plant in China. It is mainly produced in Shandong, Anhui, Inner Mongolia, Jilin and other places. Compared with vegetables, Platycodon grandiflorum has simple cultivation techniques and high planting benefits. Due to the limitation of arable land area and driven by economic interests, continuous cropping of platycodon grandiflorum is inevitable. Platycodon grandiflorum in continuous cropping field has poor growth, low yield and reduced quality. In order to improve the yield and quality of Platycodon grandiflorum, drug farmers increased the amount of chemical fertilizer app...

AI Technical Summary

Problems solved by technology

During this period, on the one hand, platycodon grandiflorum adapts to the new growth environment and produces root hairs and fine roots. At the same time, platycodon platycodon root sprouts to form the aboveground stem and leaf parts. The nutrients required for growth are mainly supplied by platycodon grandiflorum fleshy roots; the place of origin is accustomed to fertilization methods The compound fertilizer and ordinary urea applied to the base fertilizer are both quick-acting fertilizers. The nutrient release period is nearly 30 days, and the peak period of nutrient release is within 10-15 days after application. As a result, the nutrient release of the base fertilizer is not coordinated with the nutrient absorption of Bellflower, resulting in the release of nutrients. Or lost to the deep underground soil or volatilized into the air, low nutrient use efficiency

[0006] 2. Topdressing with fertilizer is prone to burning seedlings

[0007] First of all, the spreading is uneven, and it often spreads to the leaves or root necks; second, it rains after spreading, and the fertilizer dissolves quickly, causing the local concentration to be too high, resulting in burning seedlings or rotten roots; third, spreading If it does not rain later, the fertilizer is exposed to the soil surface, and the nutrients are released and volatilized into the air, causing air pollution

[0008] 3. There is a significant difference between the ratio of nitrogen, phosphorus and potassium applied by fertilizer and the ratio of nitrogen, phosphorus and potassium absorbed by bellflower

[0010] 4. Neglecting the application of micronutrient fertilizers

At present, there is a lack of research on special fertilizer formulations and application techniques for continuous cropping bellflower fields

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