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2. The large line of grass covered the mulching film inside the large row, then deep-planed, covered with 10 cm thick dry straw, and finally covered with plastic film. Wheat straw has good thermal insulation properties, which can not only improve the temperature of the greenhouse, but also reduce the air humidity in the greenhouse and reduce the incidence of vegetable diseases.
3. Daxing Gaoshi cattle and horse dung uncovered the mulching film in the big noon at sunny noon. The dried cows and horse dung were sprinkled on the surface with a thickness of about 10 centimeters. Then they buried deep in the soil and they could not shave it. Finally they were covered. Plastic film. Cow and horse dung are high-calorie substances, which can increase the temperature of greenhouses by 3°C--5°C. However, this method can not be used during the seedling period of vegetables to prevent burning seedlings. It is easy to produce harmful gases during application. Attention should be paid to ventilation.
4. The Daxing Shimai and wheat straw (straw) lifted the mulching film inside the large row. While deep-planing, it was filled with wheat bran or wheat straw (grass). After filling, the mulch was covered and the wheat bran and wheat straw (straw) were wet-fermented. The release of large amounts of energy and carbon dioxide gas not only increased the ground temperature, but also added gas fertilizer to the greenhouse.
5. Large and small watering first watering in small rows for 7 days - 10 days before pouring large rows, this can not only ensure the water needed for the growth of vegetables (or fruit trees), but will not make the greenhouse temperature dropped significantly.
Five measures to improve the ground temperature
1. Planely row on a regular day in the sunny morning to uncover the film inside the big line, with three teeth hook planing large lines, depth 15 cm - 20 cm. After planing, flatten and replace the film. After deep-drawing, the soil under the membrane becomes rough and soft, and the heat absorption and heat storage capacity is enhanced.