论文部分内容阅读
CO_2气体是植物进行光合作用的主要原料之一。由于蔬菜白天进行光合作用,大棚内 CO_2的含量会迅速下降,甚至会降低到大气自然浓度(300ppm)的1/3以下,使棚内蔬菜的光合作用减弱,产量和品质降低,大大影响经济效益。应用 CO_2可促进西红柿发育,防止落花。黄瓜增施 CO_2后叶片大,生长旺,雌花多,产量高,品质佳,成熟早(一般早10天左右),增产87.4％。施用 CO_2,宜在定植后30—40天,棚内 CO_2浓
CO 2 gas is one of the main raw materials for plant photosynthesis. Due to the photosynthesis of vegetables during the day, the contents of CO 2 in the greenhouse will decrease rapidly and even reduce to below 1/3 of the natural concentration of the atmosphere (300ppm), which will weaken the photosynthesis of vegetables in greenhouse and reduce the yield and quality, which will greatly affect the economic benefits . Application of CO_2 can promote the development of tomatoes, to prevent falling flowers. Cucumber increased by CO_2 leaf large, vigorous growth, more female flowers, high yield, good quality, mature early (usually about 10 days earlier), an increase of 87.4%. CO_2 application should be 30-40 days after planting, greenhouse CO 2 concentration