近年来,林业生产者广泛应用塑料大棚(或温室)开展冬季保护栽培,其中大棚香椿栽培越来越引起人们的关注。冬季保护栽培,要求塑料大棚(或温室)密封保温条件较好。这就使塑料大棚(或温室)内的空气与棚外大气的交换受到限制,棚内香椿进行光合作用将消耗大量CO_2,而这一消耗却得不到及时的补充, In recent years, forestry producers widely use plastic greenhouses (or greenhouses) to carry out winter conservation cultivation, of which greenhouse cultivation of toon is attracting more and more attention. Winter protection cultivation, require plastic greenhouse (or greenhouse) sealed insulation conditions are better. This will limit the exchange of air inside the plastic greenhouse (or greenhouse) with the atmosphere outside the greenhouse, and the photosynthesis of Toona sinensis in the greenhouse will consume a large amount of CO 2, but this consumption will not be replenished in time.