How to fertilize watermelon can be bigger and sweeter

Increase the application of boron fertilizer 0.5-1 kg per mus, or 3.5-7 kg of boron magnesium fertilizer, mix with appropriate amount of nitrogen and phosphate fertilizer as base fertilizer, or spray with 0.1%-0.2% borax solution during the growing season. 11%, increasing sugar content by 0.7%.

The application of watermelon is soaked with 300-500 times of watermelon, or sprayed with 200-300 times of watermelon in the seedling stage, the melon stage and the expanded stage, which can increase the yield by about 10% and increase the sugar content by 0.7%.

Spraying rare earth fertilizer sprayed with rare earth fertilizer Changle Yizhi, can increase yield by about 20%, increase sugar content by 0.6%-1.7%, foliar spray, spray 3 times during the whole growth period, first time in watermelon 5-6 At the leaf stage, the spraying concentration was 0.03%, and the second and third times were in the initial flowering stage and the expanded melon stage, respectively, and the spraying concentration was 0.06%-0.08%. (Jiang Hongtao)

Prevention and treatment method of celery leaf spot

Control methods: 1. Select resistant varieties; 2. Pick seeds from disease-free plants, soak seeds in 48 °C for 30 minutes if necessary; 3. Implement rotation for more than two years; 4. Rational close planting, scientific irrigation, prevent excessive humidity in the field 5, spraying 50% of carbendazim WP 800 times solution, or 50% of thiophanate-methyl WP 500 times, or 77% of WP 1500 times ; 6. Under the conditions of protected areas, 5% chlorothalonil dust can be used, 1 kg per acre. 45% chlorothalonil can also be used, 200 grams per acre, spray once every 9 days, continuous or alternate application 2-3 times, the effect is better. (Wang Feng)

Four methods to control leek gray spot

1. Agricultural control: Apply sufficient organic fertilizer, increase phosphorus and potassium fertilizer, improve crop disease resistance; remove diseased residues, remove the diseased plants from the field and bury them or burn them after each harvest to reduce the source of the disease.

2. Chemical control: After each harvest and early onset, spray green shield 4% agricultural anti-120 melon tobacco type 500-600 times liquid, which can effectively control the occurrence of disease. The anti-120 species of microbial fermentation products are non-toxic, non-residual and non-toxic, safe for human body and the preferred fungicide for the production of pollution-free vegetables. At the same time, it contains 17 kinds of amino acids and other nutrients, which can promote the growth of amaranth and increase the yield of amaranth. It can also be sprayed with 50% scopolamine or 50% chloramphenicol 1000 times or 50% carbendazim 800 times solution.

3. Clean the pastoral: After harvesting the leek, remove the sick body in time, bury it or burn it to prevent the spread of germs.

4. Timely ventilation: ventilation and dehumidification is the key to prevention and treatment of the disease, and the amount of ventilation should be determined according to the growth of amaranth. Ventilation when freshly cut amaranth or when the outside temperature is low. (Qi Shijun)

Lettuce should increase organic fertilizer

According to the investigation by the Ministry of Agriculture, the amount of organic fertilizer applied in lettuce production in the country is small, the phenomenon of blind application of nitrogen fertilizer is prominent, the application amount of phosphorus and potassium fertilizer is insufficient, and the fertilization period and mode are unreasonable.

Fertilization principles: (1) Add organic fertilizer, control nitrogen fertilizer, increase phosphorus and potassium fertilizer; (2) Fertilizer distribution method is based on base and chasing. Topdressing is mainly based on nitrogen fertilizer and rational application of potassium fertilizer; (3) Acidification of vegetable gardens with severe acidification should be applied with acidic soil conditioner such as lime; (4) Fertilization combined with high-quality cultivation techniques, especially water management, to improve fertilizer and water use efficiency.

Fertilization recommendations: (1) Primary fertilizer application of decomposed farmyard manure 1000-1500 kg per mu. (2) The output level of mu is more than 3,500 kg: nitrogen fertilizer is 16-18 kg (per mu, pure, the same below), phosphate fertilizer is 7-9 kg, and potassium fertilizer is 8-10 kg. (3) The output level of mu is 2500-3500 kg: 14-16 kg of nitrogen fertilizer, 5-6 kg of phosphate fertilizer, and 6-8 kg of potash fertilizer. (4) 1500-2500 kg per mu: 12-14 kg of nitrogen fertilizer, 4-5 kg ​​of phosphate fertilizer, and 5-6 kg of potassium fertilizer.

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