A Restoration Method for Sand-pressed Watermelon Continuous Cropping Abandoned Land

Abstract

The invention discloses a method for repairing sand-pressed watermelon continuous cropping abandoned land. After abandoning the sand-pressed melon field, it is exposed to the sun for two consecutive years. After two consecutive years of sand-exposing, before re-pressing the sand, apply organic fertilizers. The amount of each fertilizer is 1 ton / mu, and the soil is rotated to 30cm The depth is leveled, and a new gravel layer of 20 cm is covered on the surface, and the sand is pressed again. In the first ten days of April of the third year, remove the gravel layer on the surface, dig a planting hole, mix soil in the planting hole and apply Trichoderma bio-organic fertilizer, then sow watermelon seeds at a depth of 3-5cm, cover with soil or transplant watermelon seedlings The covering soil is lightly compacted, covered with sand, watered, and covered with film, and routine field management is carried out. The invention strengthens the quantity of beneficial microorganisms in the soil, improves their activity, significantly promotes the growth of watermelon plants, increases the biomass of watermelon plants, enhances the growth of plants, and can also significantly reduce the quantity of pathogenic bacteria in soil.

Description

technical field [0001] The invention belongs to the field of agricultural environment management, and relates to a method for repairing sand-pressed watermelon continuous cropping abandoned land. Background technique [0002] Sand-pressed watermelon, as a unique planting mode in some areas of Ningxia Hui Autonomous Region, has brought huge economic benefits to local farmers. The sand-pressed watermelon planting area is located in the junction of mountains and rivers, and the central arid zone is vast and rich in light and heat resources. The average annual sunshine hours are 2854.9 hours, the average frost-free period is 153 days, and the active accumulated temperature ≥ 10°C is 3178°C (selenium melons from The accumulated temperature required from flowering to maturity is 800°C-1000°C), and the temperature difference between day and night is 12-16°C. Especially in the period of melon swelling, suitable temperature difference between day and night and sufficient light are c...

AI Technical Summary

Problems solved by technology

[0003] Long-term continuous cropping of sand-pressed watermelon will also cause serious continuous cropping obstacles, especially Fusarium wilt, once it occurs, it will cause watermelon plants to wither and die, and its yield will be greatly reduced

Under normal circumstances, the fruit yield loss caused by Fusarium wilt can reach 15-30%, and in severe cases, it can reach 50-85%, or even the entire melon field will fail. For the obstacle of continuous cropping land for watermelon with sand pressure, due to the watermelon plantation land with sand pressure Due to the particularity of the soil (the local water shortage, the surface is covered with a 15-20 cm gravel layer), it is impossible to effectively prevent and control soil-borne wilt by using measures such as crop rotation, soil high-temperature sterilization, strong soil reduction, and soil fumigation commonly used in agricultural production. local melon farmers often abandon their fields, reducing the planting area of ​​sand melons in Ningxia from more than 1 million mu to about 700,000 mu, which has become the main restrictive factor in the production process of sand melons and seriously affected the local sand watermelon industry. healthy development of

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