1 Selection of improved cucumbers in summer and autumn open field cultivation, should be based on heat-resistant, disease-resistant varieties, can choose Jinchun No. 4, Jinza 2, Xiafeng and other varieties.
2 Soil preparation, fertilization, and sputum Because of the rainy summer, the fertilizer is easy to lose, and the organic fertilizer should be reapplied. The 667m2 of the soil preparation before the preparation of the soil is 4000~5000kg. The soil preparation should not be deep, so it is suitable for 15cm, so as to avoid the deep ploughing of the water.
Do it after the land preparation. Summer and autumn cucumber cultivation must use small sorghum or high ridges, can not use flat sputum to protect against cockroaches. The way to do this is:
1. The small sorghum is 50cm wide and 20cm high, and the sulcus is 70cm wide. Two rows of cucumbers were planted on both sides of the small sorghum, and the plant spacing was 20-25 cm.
2. The high ridge is first made of sorghum, the width of the sorghum is 70cm, the width of the sulcus is 50cm, and then a small ditch of about 20cm deep is opened in the middle of the sorghum. The seed can be sown in the inside of the small ditch after watering in the small ditch.
At the same time as doing sputum, we must also do the drainage ditch in advance to prepare for drainage after rain.
3 sowing time can be arranged according to the time of the previous crops from mid-June to early July. Most of them use live broadcast, and they can also be transplanted. Due to the weak temperature in summer, the melon seedlings are weak, and can be appropriately densely planted. Generally, 5,000 to 5,500 plants are planted in 667 m2.
4 field management
1. When the seedlings of the seedlings and seedlings grow out of the true leaves, they start to grow between the seedlings and the seedlings. In the summer, due to heavy rain and pests and diseases, the seedlings should not be late, so as to avoid the lack of seedlings. When the seedlings grow to 3 to 4 true leaves, the seedlings are fixed.
2. After cultivating and weeding, the cultivating should be carried out in shallow cultivating, and the seedlings should be rooted to prevent the lengthening. Before ploughing, I have to plough several times, focusing on weeding.
3. After the drainage and sowing, the drainage ditch should be repaired, the channels should be reinforced, and the debris at the bottom of the ditch should be removed. Once it becomes a day, the drain of the drain should be opened, and the water should be removed in time for heavy rain.
4. Topdressing watering summer and autumn exposed cucumbers, special attention should be paid to flood control. Watering depends on the sky and the ground. In the seedling stage, a little chemical fertilizer can be applied to promote the growth of the seedlings. After the melons are planted, the topdressing is usually carried out once every 10 to 15 days, and the nitrogen, phosphorus and potassium compound fertilizers of 10 to 15 kg are applied at 667 m2 each time. The fertilizer should be sufficient in the season. After the "slow heat", the weather turns cold, and 0.2% potassium dihydrogen phosphate or 0.1% boric acid solution can be sprayed on the foliage to prevent the melon.
5. Inserting, pruning, and tying the vines and planting the seedlings immediately after the watering, and combining the vines for pruning, the varieties cultivated in summer and autumn are mostly side vines, the side vines are not left, and the middle and upper side vines can leave a few leaves to pick the heart.
5 Pest Control In summer and autumn, cucumbers have more pests and diseases and are more harmful. They should be sprayed regularly to focus on prevention and treatment. The main diseases are downy mildew, powdery mildew, anthracnose and keratosis. For downy mildew, 72% DuPont dexame WP can be used in 600-800 times solution; powdery mildew can be 15% powder rust WP 1500 times; 50% anthrax fumei WP 500 times solution can be used for the disease; bacterial keratosis can be controlled by 30% DT bactericide 500 times liquid spray. Insect pests mainly include aphids, aphids, etc., and are sprayed with 40% dimethoate 1000 times solution or 20% loved 2nd 1500 times solution.
6 Harvesting summer and autumn high temperature cucumbers only take 40 to 50 days from sowing to harvesting. After the knot, the weather is gradually cool, and the time required for harvesting is not strict.
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