Cucumber seedlings planted in open field in autumn are selected for heat-resistant, early-maturing and disease-resistant “Beijing autumn melon†varieties. They can still be directly sowed in early July and will be served in the autumn off-season market from late August to early October. To apply organic manure and make ridges and ridges, do not lay a film and plant them at a density of 70-75 cm (30-33 cm).
Early-maturing Chinese cabbage sowing was started in mid-July to sow heat-resistant cabbages in stages, and early-maturing and heat-tolerant varieties such as “Xiaoza 56†and “Betty†were selected and harvested before and after National Day and Mid-Autumn Festival. It is necessary to apply basic fertilizers, fine soil preparation, watering and cooling in the rows after sowing, and to prevent diseases such as virus diseases, aphids and cabbage caterpillars from the seedling stage.
The nursery and nursery nursery sites for autumn crops should be selected in high-desert, energy-fillable, well-ventilated greenhouses or dedicated nursery sheds. Vents, doors with insect nets sealed. Noon roof covered with shade net cooling, conditional installation of external shading and micro-spray cooling facilities. In order to prevent rain, it is necessary to dredge the drainage ditch and make it into a sorghum to prevent pests and diseases.
â– Sowing seedlings for cauliflower, cabbage, indigo, lettuce and other crops planted in open field in the autumn. The most suitable sowing and nursery period in Daxing, Tongzhou and Shunyi districts is from late June to early July and is planted at the end of July to early August; High altitude mountains such as Miyun should be planted 7-10 days ahead of schedule. Choose early-maturing, heat-resistant varieties, such as: Cabbage can use "Zhong Gan 15", "Qiugan 5" and other varieties.
■Seedlings of pepper, sweet pepper, and color sweet pepper planted in greenhouses in the autumn will be raised in the middle and late July. The greenhouses with poor insulation performance should also be cultivated for 5-10 days. Color bell peppers should be properly reared and the planting period should be July. Mid-day; general seedling age 45-50 days, planted in late August-September, harvested from the beginning of November to the Spring Festival. In greenhouses with good ventilation and low temperature, 50-hole plastic plug trays are used, and special substrates for raising seedlings or peat, vermiculite, and perlite are used as substrates. Soak in warm soup and soak germination, germination at 25 °C -30 °C under the environment for 6-7 days until the seed germination.
In autumn and winter, greenhouse tomato nursery generally nursed in mid-July, planted in mid-late August, and harvested in mid-November and mid-January; greenhouses with poor insulation properties should be properly nursed. In recent years, tomato yellow leaf curl virus disease has been seriously affected. Once the infection occurs, it often results in a significant reduction in production, or even no harvest. The best way is to start prevention work from the seedling stage, select disease-resistant varieties such as “Gampen No. 11â€, and use the “full protection†measures such as shade nets, shelter film rain protection, and pest control net pest control to cultivate strong seedlings and prevent smoke. Whitefly poisoned.
■Autumn greenhouse tomato, cucumber seedlings Autumn greenhouse tomato Anti-yellow leaf curl virus, heat-resistant “Gambang 11,†“Xianke 8†and other seedlings in early July, planted in late July; cucumber selection of early maturation, resistance Good quality, “Zhongnong 16†and other varieties were planted in mid-July and planted in early August. The 72-hole plastic plug tray was used to raise seedlings. The grass carbon and vermiculite and perlite were used as the substrate; cucumbers could also be taken in July. Direct sowing method late.
■autumn shed celery nursery autumn greenhouse celery nursery in mid-July, planting in mid-September. Seeds must be sown after low temperature germination. After soaking for 24 hours, they are hand-picked to remove germinating substances on the seed coat and then germinated at 17°C to 20°C for 6-7 days. It can be placed in a place 50 cm above the surface of the well. Wait until the seeds begin to sprout, and do a good job of protecting the seedling sheds.
Carrots began to be planted. Carrots were sown in mid-July, and the varieties were selected to be high-quality, high-yield varieties with roots that were beautiful and full-faced, with peels, flesh, and fruit cores. Apply roasted, finely chopped high-quality organic fertilizer 4000 kg or commodity organic fertilizer 3000 kg per acre. After intensive cultivation, make sorghum seeds and sow seeds evenly. Use about 300 grams per acre.
The management of facilities for summer vegetables and open field dishes should be well-controlled within the facility, and the air outlets should be opened in a timely manner. On the sunny days from 11 to 15 o'clock, the shade coverings of the sheds should be shaded and cooled, and the micro-sprays or watering between the rows should be used to cool the sheds at high temperatures. According to the weather, soil and plant growth, we should do top-dressing and watering work; timely pruning and pruning, remove the old leaves, so that the field ventilation and light, reduce the incidence of disease. Do a good job in the prevention and control of diseases such as downy mildew, yellow wilt, and late-infested diseases, and insect pests such as cotton bollworm, tobacco budworm and aphid, and strictly observe the safety interval after application.
Harvesting and pulling of facilities and open field dishes This period is the late harvest of tomato, eggplant, cucumber, chilli, legume, cowpea and other crops grown in spring sheds and open fields; leeks, parsley, edible fungus, spinach, etc. Early harvesting of heat-tolerant leafy vegetables requires timely harvesting in sunny and early mornings to prevent fruit falling and miss the best commercial period to reduce quality. For early crop failure, clean the stubble, fallen leaves, and weeds, and transport them to designated locations for ozone treatment or high-temperature composting.
After the high-temperature disinfection of spring crops in the solar greenhouse, the spring crops are pulled, and the soil-borne diseases such as gray mold, sclerotium and other soil diseases and nematodes are severely sterilized in the greenhouses. 900 kg of crop straw such as crushed wheat straw is thrown into each acre; lime nitrogen is 40 kg - 80 kg or lime powder 100 kg - 200 kg. Mix well with plough layer soil, pour enough water, cover the agricultural film on the ground and cover it tightly, close the air outlet and the door of the strict greenhouse for about 30 days so that the soil temperature in the plough layer reaches above 50°C, and use the summer high temperature to kill the soil in the plough layer. Bacteria such as gray mold, sclerotium, and other soil-borne diseases and nematodes such as nematodes.
Clear the drainage ditch and the rain-proof greenhouse before the arrival of the rainy season to clear the drainage ditch early in the field, after the rain, there is no stagnant water in the fields. Examine and repair the greenhouse wall and roof to ensure that there is no leakage; Check the storage conditions of grasshoppers, insulation, and other insulation materials to prevent loss due to leakage.
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