最近在提高植物的光合作用效率和控制其光呼吸作用损耗,以及培育低光呼吸作物品种方面,巳经找到一些实际可行的方法。施加二氧化碳肥料施用二氧化碳作肥料,是目前进一步提高作物产量的一个有希望的方法。荷兰进行了温室试验,将二氧化碳浓度提高3—5倍,能使黄瓜和甘兰等增产25—50％。最近美国也进行了田间试验,对每亩作物每小时施加15斤的二氧化碳,并测定了作物四分之三高度处的二氧化碳的浓度为450ppm,可使作物增产26—67%。又在棉花生长期的75—130天期间,每天施加二氧化碳6小时,每亩每小时约23斤,大气的二氧化碳浓度提高到500ppm,使棉花增产30％。培育低光呼吸作用的作物品种高效作物玉米与低效作物烟草的暗呼吸作用相似.但烟草的光呼吸作用则大大 Recently, some practical approaches have been found to increase the photosynthetic efficiency of plants and to control their photorespiratory depletion, as well as to cultivate low light respiration crop varieties. The application of carbon dioxide as a fertilizer for the application of carbon dioxide fertilizers is a promising way to further increase crop yields. In the Netherlands, a greenhouse experiment was conducted to increase the concentration of carbon dioxide by 3-5 times and to increase yields of cucumber and cabbage by 25-50%. More recently, the United States conducted a field trial that applied 15 pounds of carbon dioxide per hour per acre of crops and 450 ppm of carbon dioxide at three-quarters of the crop, yielding a 26-67% increase in crops. During the cotton growing season, 75-130 days, carbon dioxide is applied for 6 hours a day, about 23 pounds per acre per hour, the atmospheric carbon dioxide concentration increased to 500ppm, the cotton yield 30%. Crop cultivars that produce low light respiration High-efficiency crop corn is similar to the dark respiration of low-efficiency crop tobacco, but the photorespiration of tobacco is much greater