Small watermelon cultivation in summer and autumn
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Variety selection Watermelon varieties grown in summer and autumn must be able to withstand high temperatures and rain, and be stable under high temperature conditions, and have a high sugar content in environments where the temperature difference between day and night is small. Better varieties: Black Beauty, Xiaoling, Liling, Xiaolan, Diana.
It was determined that the sowing date should be planted in mid-May and that after the rainy season, it should be harvested and harvested before the typhoon approached. Seeding in this period is more suitable for cultivation in open field, with less risk and lower cost. In the period from late June to early July, the seeding is not affected by the rain, but it is vulnerable to the typhoon in August and should be cultivated using rain facilities. This period can be listed in mid-September, melon market is better.
Soil preparation should not be used as much as possible. If you want to use the former crop for continuous cropping, you must immediately sprinkling it with a 500-fold solution of formaldehyde to soil after the harvest of the previous crop. In addition, soil pH is too low to cause wilting. Therefore, the acid-heavy field can be sprinkled with lime in the saggers. Summer and autumn for the short growing period of watermelon, soil and fertilizer requirements are very high, the general basal organic fertilizer to the main, applied per acre decomposed organic fertilizer 500kg, potassium sulfate compound fertilizer 40kg, superphosphate 30kg, borax 0.5kg. Seeding seeds are first soaked in warm water at 55°C and stirred until the temperature drops to room temperature, soaking for 4-6 hours, germination at 30°C, germination for 24 hours, and whitening can be used for sowing. When planting, first use sterilizing water to drench the planting hole, then put the dew-colored seeds into the planting hole, and pay attention to the bud head down. Put one seed in one hole that has normally germinated, put two seeds in the unemerged one, coat a fine layer of soil after sowing, and then pour the cover soil with a sprayer to make it closely contact with the seeds. Sowing should be done in the evening or on cloudy days so that the seeds can germinate in a short time, avoiding sun exposure and dehydrating dead seedlings.
Field management and planting: A 2.8-meter wide planting ridge (with a ditch) with 1 row per plant, plant spacing of 0.5 m, and planting 400-540 plants per acre. Fertilization: One week after planting, live tree fertilization was applied. Nitrogen fertilizer was used as the main ingredient to promote lateral vine growth. The planting holes were mainly used for planting, and live trees were applied for compound fertilizer one week later to promote vine extension.
When squashing, such as the size of an egg, it can be applied into the swelled melon, and it can be combined with field irrigation to apply the sulcus. In the late stage of melon development, when the temperature is too high and the plant growth is slow and there is a phenomenon of premature aging, nutrient solution fertilizer or potassium dihydrogen phosphate can be used for spraying. Pruning: The vines that occur before sitting in the guava must be removed. The vines that occur after sitting in the guava can grow and grow as nutrients. Pruning is mainly composed of three or four vines of the main branch, small watermelons leave 3-4 per plant, medium-sized melons 1-2. Artificial pollination: artificial pollination must be performed to increase fruit setting rate. The small watermelon matures about 25 days after pollination, and the medium watermelon matures about 28 days after pollination.
Pest control Pest control with the general spring for watermelon, but the summer and autumn for positive high temperature and rainy season, anthrax serious incidence, it is advisable to adopt the principle of prevention and control, enter the fruit setting period after the weekly use of chemical control once, every continuous rainstorm should be in each After the heavy rain spray treatment.