One, small seedlings planted, deep cultivation soil
The sowing date of wheat stubble tomatoes is suitable from May 20 to June 5. It is planted from late June to early July. We must choose land plots with high topography and easy irrigation and drainage. Immediately after the wheat harvest, the land was completely destroyed and the base fertilizer was applied. Colonization should be grasped as early as possible. Small seedlings planted wounds less roots, easy to slow seedlings. The planting density is 30 cm and 60 cm apart. Prior to planting, 15 to 20 cm deep planting trenches were planted at a row spacing, digging pits at the bottom of the trenches, planting seedlings and then watering. After easing the seedlings, with the growth of the seedlings in different grades, after the planting trenches are filled, ridges and furrows are opened between the rows so that the main roots of the tomatoes are inserted into the soil layer below 30 cm to reduce the influence of high temperature on the root system. With this cultivation method, the soil has a good air permeability and is easy to drain during the rainy season.
Second, between the intercropping
In the tile ditch of tomatoes, interplant 1 to 2 lines of fast-growing green leafy vegetables, such as cabbage, coriander, spinach, etc., to shade between rows, which can keep the soil moisture and reduce the temperature of the soil. It has a certain degree of protection for the root system and reduce diseases. Effect. Wheat straw can also be used to cover the roots of the tomatoes and can serve the same purpose.
Third, field management
Wheat aphid tomatoes grow in high temperature seasons, and should be used to reduce the ground temperature. In the early stage of growth, no drought is appropriate. Watering should be as few as possible. Seedlings generally do not top-dressing, the results of top-dressing ammonium bicarbonate 3 to 4 times, each time 50 kg per mu. When the height of the seedlings is more than 30 cm, the vines, the pruning, and the single stalk are cut in time. In the later stage, 0.3% urea solution and 0.2% potassium dihydrogen phosphate solution were sprayed on the leaves to supplement the foliage.
Fourth, comprehensive prevention and control of pests and diseases
The main diseases of wheat stubble are virus disease, early blight and late blight. Prevention of early blight and late blight can be used 58% metalaxyl manganese zinc spray 500 times. Virus disease prevention and control: 1 soaking with 10% trisodium phosphate for 20 minutes, remove and wash after repeated washing; 2 seedlings should be removed in time to treat aphids. Use 40% chrysanthemum killing oil 3000 times spray; 3 before the pruning, hiccups, tied vines sprayed with a virus passivation agent, such as 1% of soapy water, copper sulfate, potassium permanganate or plant disease spirit, etc. And then work to prevent contact with infection; 4 timely after the onset of pollution-free pesticide resistance Weiwei 300 times, anti-toxic agent No. 1 500 times spray control.
V. Hormone treatment
Wheat aphid tomato flowering results in high temperature, easy to cause flower drop, 15 to 20ppm of 2,4-D wipes or spray with tomato flowers.
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