At present, early spring greenhouse vegetables have entered the fruitful harvest period, which is the season of harvesting and marketing; in the spring greenhouse, thermophilic vegetables have entered the fruiting period, and the fast-ripening vegetables in open fields have begun to be harvested, but they are also the high-risk period for protected vegetable pests and diseases. The main agricultural management in vegetable fields cannot be relaxed.
Facility management needs fine
At this time, tomatoes, cucumbers, eggplants, sweet peppers, radishes, cabbages and other crops grown in the greenhouse were successively harvested. At this time, the vegetative growth and reproductive growth of the crops are carried out at the same time. This is the critical period for the need for water and fertilizer, and it is particularly important to strengthen field management.
Adjust suitable growth environment
Although the temperature in early summer has increased, it has changed greatly. It is necessary to timely adjust the temperature and air humidity suitable for growth and development according to external climate changes and different crops. The physiological activity of cucumber is different from that of tomato and eggplant. Four-stage temperature adjustment method should be used. Cold-resistant vegetables such as leaves and rhizomes should be kept at the tuyere to avoid excessive nighttime temperatures. The tomato, eggplant and other crops are kept at 40% to 50%; sweet peppers and cucumbers and other melon crops are at 60% to 80%.
Strengthen watering and top dressing
According to weather conditions, plant growth and soil conditions to water top dressing, top dressing should be vigorously promote the integration of water and fertilizer technology, with drip irrigation to provide comprehensive nutrition, reasonable ratio of "Christmas tree" and other fast-dissolving fertilizer is appropriate. To water the ground with small water, watering 8 to 10 squares per acre, avoid flooding. A 20-bag carbon dioxide gas fertilizer is suspended per acre to increase the carbon dioxide concentration in the room and increase the efficiency of photosynthesis, which can increase production and improve quality.
Plant management
Timely management of vines, vines, loquats, pruning, and snoring was performed. Cucumbers and tomatoes were continuously used to extend the results of the plants and remove yellow leaves, old leaves and diseased leaves in time; tomato was first The ear fruit grows to the green ripening stage and the lower leaves are knocked out. The dark green leaves of the lower part of the cucumber must also be promptly knocked out to prevent infection of downy mildew due to poor ventilation.
Fruit Management
It is necessary to strengthen auxiliary pollination and fruit thinning and sparse fruiting; tomatoes and eggplants adopt natural pollination methods to maintain flavor and quality, and can use pollination pollinator-assisted pollination, and can also release two boxes of bumblebee-assisted pollination per acre. Tomatoes should be sprayed with oscillating pollinators or conditioners when they open 3 to 4 flowers per panicle. If the flowers are sprayed at the time of opening 1 to 2 flowers, the fruit of the panicles will only affect 1 to 2 and affect the yield. . Remove excess flowers and fruits as soon as possible. Cucumber does not need to artificially pollinate the normal melon, and it is forbidden to use hormones to promote flowering of the young melon.
Harvest fruit in time after ripening
It can not only increase the product rate, but also prevent fruit from falling and affecting the results of the plant. It is advisable to harvest every morning.
Open field thermophilic crop colonization
Cucumbers, tomatoes, eggplants, peppers, squashes, etc. planted in the open field are planted at an appropriate time. The “cold tail warmer†should be selected for the sunny planting. The temperature at the time of planting should be stable above 10° C. for five consecutive days, and the ground temperature at 10 cm should be stable at 13° C. the above. To apply organic manure as base fertilizer, apply 4,000 kg of organic fine manure or 3,000 kg of bio-organic fertilizer per acre, of which two-thirds are laid evenly before arable land, and one third is applied near the root of a crop when hoeing. It is necessary to finely prepare the soil, to achieve leveling, leveling, and ridge straightness without rubbish; in the 5 to 7 days before planting, the seedlings are subjected to low-temperature “scald seedlings†to enhance the adaptability of the seedlings to the post-planting environment; the density is appropriate when planting, The depth is the same, in which tomatoes and eggplants are planted in depth, covering more than 2 to 3 centimeters above seedlings; cucumbers, pumpkins, wax gourds and other melons must be planted in shallow depths, and the cover soil should be level with the seedlings.
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