In recent years, with the adjustment of the structure of agricultural products, the planting area of ​​watermelons has steadily increased slightly. In the application of fertilizers to watermelons, the investment structure is gradually being adjusted, and many growers have increased the amount of organic fertilizers to increase the yield of watermelons. , improve quality have achieved very good results. However, some farmers also use organic fertilizers, the effect is not obvious, and some even have negative effects. The analysis of the reasons is mainly due to some problems in the selection and application of fertilizers.
First, choose varieties should be cautious
It is understood that there are more than 3,500 kinds of organic fertilizers that have been registered in the country, some of them are compounded with inorganic fertilizers, and the organic matter content is very low; some are mainly based on poultry excrement, some have a good degree of maturity, and some have a poor degree of maturity. There are no decoctions at all; some are based on plant-based raw materials and have a high content of organic matter; others use mineral raw materials as their main source of organic fertilizer, and some farmers report that it is difficult to decompose this year when they are applied to the land next year. Minerals. Many products often make farmers dazzled. We recommend using organic fertilizers that are dominated by plant-based raw materials and fully decomposed organic fertilizers. Do not apply chicken manure fertilizers that are put on the market without sufficient maturity. This type of organic fertilizer is very easy. Burned crop roots cause dead seedlings.
Second, it is very important to use fertilizer
After applying organic fertilizer, it can effectively improve the soil structure, increase the content of organic matter, and enhance the ability to retain water and fertility. Although organic fertilizer has many advantages, it is still not enough to apply organic fertilizer alone. It is also necessary to use inorganic compound fertilizers, especially potassium sulfate compound fertilizers, so that organic and inorganic fertilizers can be combined and delayed effective fertilizers can be combined. To promote the improvement of watermelon sugar content, give full play to the comprehensive effect of different fertilizers.
Third, the application method of speaking skills
In the production of watermelons, it is often encountered that the same organic fertilizers are used by different farmers. Some farmers think that they are good, while others think that it is not. The reason is whether they have mastered the application skills. First, the organic fertilizer must be applied 15 to 20 days before the watermelon is settling. Early application can be effective as soon as possible and the effect of applying too late is poor. Second, it is necessary to pay attention to the depth of fertilization. It should be applied to the soil below 20 cm to induce Watermelon roots under the bar, Shi shallow nutrients easily lost; Third, after the application of organic fertilizer, to ensure that the soil has a good sensation, the better the sensation, the faster the release of fertilizer, poor lyrical effect; the fourth is to avoid the application of chlorine Fertilizer, so as not to reduce the amount of sugar, affect the inherent quality of watermelon.
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