When growing watermelons, choosing the right fertilizer is crucial for their growth, yield and quality. The selection and application of fertilizers should be based on a comprehensive consideration of factors such as soil fertility, watermelon growth stage and climatic conditions. The following will introduce in detail the types of fertilizers, application methods and precautions used when growing watermelons.
(1) Nutritional requirements for watermelon growth
As a vine-like herb, watermelon has a long growth cycle and a large demand for nutrients. During the growth process, watermelons mainly need macronutrients such as nitrogen, phosphorus and potassium, as well as trace elements such as calcium, magnesium and sulfur. These elements have an important impact on the growth, development, yield and quality of watermelons.
(2) Fertilizer types and characteristics
a. Organic fertilizers: Organic fertilizers are rich in organic matter and a variety of nutrients, which can improve soil structure and increase soil fertility. Common organic fertilizers include farmyard manure, livestock and poultry manure, crop straw, etc. When growing watermelons, organic fertilizers can be applied as base fertilizers to provide a long-lasting nutrient supply for watermelon growth.
b. Chemical fertilizers: Chemical fertilizers have the characteristics of high nutrient content and rapid action, and can quickly meet the nutrient needs of watermelon growth. Commonly used chemical fertilizers include urea, diammonium phosphate, potassium chloride, etc. During the growth of watermelon, chemical fertilizers should be applied reasonably according to its growth stage and nutrient demand characteristics.
c. Biological fertilizers: Biological fertilizers are fertilizers that use the life activities of microorganisms and their metabolites to improve soil and provide nutrients. Biological fertilizers are environmentally friendly, safe, and pollution-free, and can improve the disease resistance and quality of watermelon. Common biological fertilizers include microbial fertilizers and biological organic fertilizers.
(3) Fertilizer application methods
a. Base fertilizer application: Before planting watermelon, the fertilizer should be fully mixed with the soil and applied as base fertilizer. The amount of base fertilizer applied should be determined based on factors such as soil fertility and watermelon variety. Generally, 2,000-3,000 kg of organic fertilizer is applied per mu, and chemical fertilizers can be applied in appropriate amounts based on soil nutrient conditions.
b. Topdressing: During the growth of watermelon, topdressing should be applied according to its growth stage and nutrient demand characteristics. The application time and amount of topdressing should be adjusted according to the growth of watermelon and climatic conditions. Generally speaking, during the vine growth period and fruit expansion period of watermelon, the application amount of nitrogen fertilizer and potassium fertilizer should be appropriately increased to promote the growth of watermelon and the development of fruit.
(4) Precautions
a. Fertilizer application should be appropriate to avoid excessive fertilization leading to soil compaction, nutrient waste and environmental pollution.
b. When applying chemical fertilizers, attention should be paid to the type, concentration and application time of fertilizers to avoid negative effects on watermelon.
c. When planting watermelon, attention should be paid to the application of organic fertilizers to improve soil fertility and watermelon quality.
d. During fertilization, attention should be paid to the uniformity of fertilizers to avoid excessive or low fertilizer concentrations that may have an adverse effect on watermelon growth.
(5) Fertilizer selection recommendations
a. For areas with low soil fertility, it is recommended to apply more organic fertilizers to improve soil structure and soil fertility.
b. For areas with high soil fertility, chemical fertilizers can be applied in appropriate amounts according to the watermelon growth stage and nutrient requirements.
c. When applying biological fertilizers, you should pay attention to products produced by regular manufacturers and follow the instructions for use.
In short, choosing the right fertilizer and applying it reasonably when planting watermelons is the key to improving watermelon yield and quality. Reasonable fertilization can meet the nutrient needs of watermelon growth and promote the healthy growth and development of watermelons. At the same time, during the fertilization process, attention should be paid to the effects of factors such as fertilizer type, concentration and application time on watermelon growth.
