The long summer has a pleasant climate and abundant sunshine, which is suitable for the growth and development of most vegetable crops. It is the best time for many warm-loving vegetables to blossom and bear fruit, but it is also the high incidence period of vegetable diseases and insect pests in protected areas. The main agricultural activities of vegetable fields are as follows:
Management and harvesting of vegetables in protected areas At this time, crops such as cucumber, eggplant, pepper, tomato, radish and Chinese cabbage planted in the greenhouse gradually matured and harvested; The leafy vegetables such as cucumber, eggplant, zucchini, celery and lettuce planted in the greenhouse have been harvested. At this time, the vegetative growth and reproductive growth of crops are carried out at the same time, which is the key period of water and fertilizer demand, so it is particularly important to strengthen field management.
First of all, we should increase the outdoor air and adjust the suitable growth environment such as light, temperature and humidity; Strengthen the management of watering, topdressing, auxiliary pollination, fruit thinning and seedling dropping, and do a good job in the prevention and control of various vegetable diseases and insect pests. It is necessary to harvest in time, improve the commodity rate, and prevent seedlings from falling off because of late harvest.
Management of leafy vegetables in the open field and harvesting of cabbage, cauliflower, lettuce and other crops planted in the open field, strengthen fertilizer and water management, and do a good job in prevention and control of diseases and pests such as cabbage caterpillar and aphid. Lettuce, lettuce and early-maturing Chinese cabbage are harvested one after another, as well as fast-maturing vegetables such as rape, fennel, radish and Chinese cabbage, which should be harvested in time in the best commodity period of fruit.
Management of fruits and vegetables in the open field During the long summer, crops such as tomatoes, cucumbers and eggplants planted in spring are in the growing period, so it is necessary to do a good job of intertillage and loosen the soil to promote roots before "squatting seedlings"; At the same time, prepare for the cold to prevent losses caused by "late spring cold". In addition, at this time, the green onion begins to be planted, and it is necessary to apply sufficient decomposed organic fertilizer, deeply cultivate the land, select healthy green onion seedlings for planting, ensure reasonable density and consistent depth during planting, and pour enough planting water in time.
After summer stubble, tomato seedlings in greenhouse generally began in early May. Heat-resistant varieties such as "Juefen 702" were selected and seedlings were raised in greenhouse or greenhouse with 72-hole plastic plugs. The seedling age is 20-30 days, and it is sown in awning (early June). The previous crops are early-maturing crops such as small watermelon and Chinese cabbage. Fruit can be harvested 50 days after planting, and seedlings can be pulled out in early June at 5438+065438+ 10. The harvest time coincides with the off-season of tomato products from August to September, which can make up for the market shortage and has high economic benefits.
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