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First, the seedlings should be transplanted with fertilizer. All the nutritious soils for seedlings should be nutritious, and the seedlings should be transplanted with fertilizer. Therefore, one should choose deep and sterile sandy loam as a new seedbed, and do not use old seedbeds over the years; secondly, use organic compost such as decomposed compost and column manure that account for 50% of the total fertilization of the seedbed; Apply a certain high content of compound fertilizer or phosphorus and potassium fertilizer; Fourth, it is necessary to apply the decomposed human excrement early to make it fully mixed with the bed soil. At the same time, in the first half of the system, every 100 kilograms of bauxite is sprayed with 200-300 ml of formalin and 25-30 kg of water, and then covered with plastic film to kill the bacteria. Generally, each nutrient soil can be used as a nutrient meal (block) of about 2,000. It is necessary to do the simmering, sown, cover the soil, and cover the film.
Secondly, high-quality base fertilizer should be applied in divided doses. The base fertilizer should be based on organic fertilizer and supplemented by chemical fertilizer. In the structure of the fertilizer, nitrogen and potassium should be the main, followed by phosphate fertilizer, and appropriate amount of trace elements. Organic fertilizers should be applied with various types of cake fertilizers, compost made by farmhouses, manure, and bio-enriched fertilizers such as bio-organic fertilizers such as enzymes, and avoid applying a large amount of nitrogen fertilizer. The base fertilizer should be 100 kg of cake fertilizer per mu, or 4000-5000 kg of composted compost, 75-100 kg of plant ash, or 75-100 kg of bio-organic compound fertilizer of combined enzymes, and 50 kg of compound fertilizer with high content. Of course, when determining the amount of fertilization, it is necessary to increase or decrease the amount according to the local soil quality and fertility. The first base fertilizer should be applied 20 days before the sowing of watermelon or the transplanting of seedlings, and the amount of fertilizer should account for about 70% of the total amount of base fertilizer. The second fertilization was separated from the first time by about 10 days, and the application amount was about 30% of the total amount of fertilization.
Third, we must optimize fertilization techniques. The first is to change the application of the base fertilizer for the application or point application, that is, to apply a large piece, it is better to apply a point and a line for the hole; the second is to apply the base fertilizer for secondary application, layer application, the first base fertilizer Adopting strip application and deep application, the depth is about 25 cm. The second base fertilizer is applied by acupoints, the depth is about 10 cm, the thickness of the cover soil is not less than 3 cm, and the fertilization mark is used. The third is that the ratio of base fertilizer to top dressing is generally 7:3 or 6:4, topdressing is generally divided into seedling fertilizer, vine fertilization, and expanded melon fertilizer, combined with the prevention and control of pests and roots outside the spray; fourth is to look at the earth to see the fertilization, the lack of sensation after the application It is necessary to irrigate the water, where the groundwater level is too high, so that the deep ditch can be used to raise the field. In short, the water is simmered and the fertilizer is activated by water to improve the efficiency of fertilization.
Author: Zhang Yuhong
Source: Hubei Science and Technology News
Optimize fertilization and promote high-yield watermelon technology
When the watermelon is listed every year, the direct cause of the sale of watermelons is “sweetness and warmthâ€. The degree of sweetness is the amount of sugar. Generally, the sugar with low sweetness has a sugar content of 5-6%, and the sugar content with high sweetness is 10-12%. High-quality watermelon with high sweetness is not only easy to sell in the market, but also has high sales efficiency. In fact, in addition to the intrinsic quality factors of high quality watermelons, it is largely determined by optimizing fertilization techniques.
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