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大棚内喷施 CO_2气肥技术最早始于北欧的荷兰、丹麦,60年代扩展到西德、美国、日本。目前世界各国都在大力推广此项技术,其中一些国家施用面积达90%。我国近几年开始引进这项技术,目前推广面积不大,处于试验阶段。1.基本原理一般作物正常生长所需 CO_2的浓度为1000ppm,而密闭大棚内只有100～200ppm,作物长期处于 CO_2“饥饿”状态。该项技术基于作物生长过程中进行光合作用需要大量 CO_2的机理,在大棚内通过特定装置生成排出
Greenhouse spraying CO_2 gas fertilizer technology first started in the Nordic countries of the Netherlands, Denmark, the 1960s extended to West Germany, the United States, Japan. At present, all countries in the world are vigorously promoting this technology, of which some countries have applied area of 90%. In recent years, our country has introduced this technology, and the current promotion area is small in the experimental stage. 1. Rationale Generally, the concentration of CO 2 required for normal crop growth is 1000 ppm, while the enclosed greenhouse only has 100-200 ppm. Crops are constantly in a state of starvation CO 2. The technology is based on the mechanism of photosynthesis during crop growth requires a lot of CO2, generated in a greenhouse through a specific device to discharge