The Fifth of Sweet Potato Fertilizer Series: Integrated Techniques for High-yield, Non-pollution, Optimized Fertilization of Sweet Potato
According to the experimental research and production practice over the years, we have summed up the high-yield pollution-free optimization fertilization technology model for 3,000-4,000 kilograms of fresh potatoes per mu:
1. Combining organic, inorganic, and biotechnology, apply base fertilizer. Although sweet potato has the characteristics of resistance to pods, it has a long growing period and strong fertility, and consumes more nutrients in the soil. Therefore, basal fertilizer must be applied in order to give full play to its high yield performance. On the basis of soil fertility testing and soil fertility, formula fertilization is applied to fertility above average, more than 1% organic matter in soil, more than 0.05% of available nitrogen, more than 20 ppm of available phosphorus, and one millionth of available potassium. More than 100 plots, generally Mushi quality farmyard fertilizer 3000-4000 kg plus GB (more than 200 million bacteria per g), 2-3 kg of biological fertilizer, plus NPK content of more than 15% of high-quality sulfuric acid Potassium compound fertilizer 30 kg. When there is no farmyard fertilizer, you can use Granville brand fulvic acid to activate phosphorus and potassium fertilizer instead of 50-60 kg per mu. Basal fertilizer can be applied once during site preparation, and according to the test results of soil testing, the amount of compound fertilizer should be appropriately increased or decreased in different fertility plots. Because the roots of sweet potatoes are concentrated in 25-30 cm soil layers, the basal fertilizer must be applied in a depth of 25-30 cm in order to facilitate the absorption of the roots. In order to deepen the plough layer, it is better to use rushing furrows to plant ridges. The way.
2. Skillfully applying topdressing to make up for nutrition and promote healthy growth of plants. For fertilized plots, according to the principle of lack of supplements and lack of supplements, fertilizers are applied in the early stage of potato block expansion. Generally, Amino Acid Chelated NPK Ternary Compound Fertilizer is 7.5-10 kilograms, or Dihydrogen Phosphate is applied. Potassium 2-3 kg. The fertilizing method is acupuncture or water-dissolving and watering the roots. Each fertilizer is 0.25-0.5 kg.
3. Scientifically use foliar fertilizers to balance nutrition and coordinate growth. The use of high-tech products and the implementation of foliar fertilization can balance nutrition, stimulate plant vigor, improve stress resistance, coordinate vegetative growth and reproductive growth, and greatly improve the magical effect of quality and yield. During the whole growth period, Lei Li2000 functional compound liquid fertilizer was sprayed 3-4 times, and 30 bags of 30 bags of water and 30 kg were used per acre to increase the output by 20%-30%. Can also use Laoxiang brand high-efficiency biological liquid fertilizer, spraying 3 times throughout the growing period. Each sweet potato special liquid fertilizer 1 bag 25 grams of water, 15 kilograms of stems and leaves spray, can increase production by about 30%.
Source: Henan Agricultural Information Network