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桦甸县参场应用地膜覆盖方式栽培人参8.4万平方米,其中当年收了4万平方米,平均增产26.15％,增加产值31万多元,投入、产出效益比达1:30。人参地膜覆盖栽培为什么能增产呢?1.提高了地温,促进人参早出苗。覆盖地膜的参床比不覆膜的床土温度高2—3℃,以生长前期土壤10厘米处的温度增高最为明显,由于春季土壤温度高。可使人参早出苗7—10天。2.减少土壤水分蒸发,改善了土壤的水分状况。塑料薄膜可阻止参床土壤水分蒸发,使膜下土壤水分形成微循环。保持土壤湿润,防止床土干燥对人参生长的影响。3.增加了参棚下的散射光。由于地膜对光线的折射和反射,增强了参床中参叶部位的光照强度,提高了人参光合作用效率。
Huadian County ginseng field application ginseng covering 84,000 square meters, of which received 40,000 square meters, an average increase of 26.15%, an increase of more than 310,000 yuan output value, input, output-benefit ratio of 1:30. Why can ginseng film mulching cultivation increase yield? 1. Increased ground temperature, promote ginseng early emergence. The mulching bed covered the mulch was 2-3 ℃ higher than that of the mulched mulch. The most obvious increase was the temperature of 10 cm in the early growing stage, due to the high soil temperature in spring. Ginseng can make early emergence 7-10 days. 2. Reduce the evaporation of soil moisture, improve soil moisture conditions. Plastic film can prevent the infiltration of soil moisture evaporation, so that the formation of membrane moisture under the microcirculation. Keep the soil moist, to prevent bed soil drying ginseng growth. 3. Added shelter scattered light. Due to the refraction and reflection of the film on the light, the light intensity of the ginseng leaves in the ginseng bed is increased, and the photosynthesis efficiency of the ginseng is enhanced.