Watermelon fertilizer management technology

　　 1 . The post-fertilization delay of small watermelons requires less fertilizer, and the growth period is shorter when the cultivation is delayed in autumn. On the basis of applying the base fertilizer, there is less post-fertilization in the late stage. Generally, only the potassium sulfate and urea or the three-element compound are lightly chased during the expansion of the melon. fat. In the later stage, foliar spray fertilizer was used to supplement nutrients. Specifically: When the young fruit grow firmly secured to the egg size, depending on the plant growth, the 667 m 2 administered every 10 to 15 kg potassium sulfate, 10 to 15 kg of urea, three elements of fertilizer, or 15 to 20 kg. After that, every 5 to 7 days, the foliar fertilizer will be sprayed once, and the special foliar fertilizer such as Foliage can be sprayed, and Flotte can be sprayed. 0.2 % to 0.3 % of potassium dihydrogen phosphate can also be sprayed to improve the quality and promote early maturity.

　　 2 . Watering in the autumn, the watermelon often encounters high temperature and drought during the growth period, and the plant transpiration is large. In order to reduce the influence of high temperature and drought, timely irrigation should be paid attention to, especially before and after the opening of the female flower and the fruit expansion period, it is very sensitive to the water reaction. Then, the young leaves of the vines became thinner and the leaves turned gray-green. At noon observation, the leaves of the plants wilted and drooped. When the flowering and fruiting period is short of water, the fruit development is hindered, the yield is low, and the quality is poor. Therefore, according to the weather conditions and plant appearance, water should be timely to ensure the plant grows robustly. At higher temperatures of the previous, water should be in the morning and evening, an amount of water from the ridge (furrow) plane 5 to 8 cm is appropriate, excess water immediately after pouring negative, to maintain Qimian drying, avoid flood irrigation . After entering the fruit expansion period, the temperature will gradually decrease, and the watering should be carried out at 9 to 11 am. The water volume should not be too large, and the water can be poured in the small ditch.

　　 In August and September , in addition to drought, there will be sudden heavy rains and rainstorms. Because the greenhouse has not been buckled in the early stage, it should be drained and flooded in time after the rain so that the time in the field does not exceed 10 hours. If there are conditions, you can immediately use the cool groundwater to carry out the “steaming garden” to reduce the ground temperature and supplement the plant rhizosphere with oxygen.

　　 3 . It is easy to control the small watermelons, and the fertilizer should be properly controlled before the plants are flowered and placed. If the length of the main vine has grown, 5 to 8 cm at the main vine growth point , crush the melon vine or circulate the melon vine to delay the growth rate of the vine, promote the development of the female flower, and increase the rate of sitting.

Fertilizer management:

Watermelon grows fast, fruit is large, yield is high, need   Fertilizer amount, except for basal, and then dressing demand during growth of 4 --5 times for long vine fruiting growth needs. In the southern growing season, there are many rains causing disease, the output is unstable, and the quality is degraded. Therefore, it is necessary to pay attention to ditching and drainage to prevent the water in the area. In addition to the direct sowing, the water is irrigated to promote sprouting and emergence, generally combined with top dressing and watering, the first time in height 3 - 4 leaves. 750 kg per mu dilute human excrement, in the second 6--713 trifolia Length - 15 cm, from the strain line at one side of 15 cm 15 cm digging a wide, shallow depth of 4 cm, pouring 15--20% human fecal 750--1000 kg when the third flight vine length 30 cm at the other side the same digging a shallow trench, pouring mu 15--20% Renfen 1250--1500 kg. In the south, there are many small melons, and the fourth time, after harvesting the first melon, chasing 1000 kg of manure to promote the growth and development of the two melons.

How to manage the fertilizer and water in the seedless watermelon cultivation when the seedless watermelon is cultivated: the plant growth of the seedless watermelon is strong, and the demand for fertilizer and water in the whole growth period is greater than that of the common diploid watermelon, in order to ensure high yield and fruit quality, To ensure the scientific supply of fertilizer and water, adopt a management approach of “promoting two ends and controlling the middle”. Seedless watermelon grows weakly in the early stage of growth. It should ensure fertilizer and water, increase the ambient temperature and promote its growth . It will grow vigorously in the middle and late growth stages, and it is easy to grow and sit on the melon. Therefore, before the melon is eaten, the fertilizer should be controlled to strengthen the pruning. Control vegetative growth. After sitting on the melon, especially in the period of expanding the melon, we must ensure sufficient supply of fertilizer and water. Generally, 15 to 20 kilograms of compound fertilizer can be applied per 667 square meters , and water can be poured 2 to 3 times to promote the rapid expansion of the fruit and give full play to the high yield advantage of seedless watermelon. It can also be combined with watering to give full play of 8 kg of urea and 10 kg of potassium sulfate . Try not to apply or less phosphorus, so as not to increase the amount of white peony seeds in the fruit. Seedless watermelon should generally be more common basal body two multi watermelon, soil fertility under moderate conditions, may be employed per 667 square meters furrow or hole manure 4000-5000 kg, 60-80 kg cake fertilizer, superphosphate to 40 50 kg, urea 30 kg, potassium acid 25 kg, as the base fertilizer of seedless watermelon.