塑料大棚对油松,侧柏容器苗生长的影响

70年代以来,塑料大棚容器育苗技术(以下简称大棚技术)在我国有了较快的发展,与常规育苗相比,它具有出苗早、造林成活率高等优点。目前对大棚容器育苗技术的研究,多集中于培养基质、容器类型、规格等方面,但对大棚条件下,环境变化与苗木生

THE EFFECT OF PLASTIC GREENHOUSE ON THE GROWTH OF THE CHINESE PINE'S AND CHINESE ARBORVITAE'S CONTAINERISED-SEEDLINGS

The growth and the accumulation prosess of dry matter of the Chinese Pine's and Chinese Arborvitae's containerized-seedlings under the plastic greenhouse condition which not being controlled are studied in this paper and compared with those (seedling) grown under the field condition. The main results obtained as following: 1. The biomass of the containerized-seedling under the condition of the plastic greenhouse are lower than those under the fiold condition, the difference between the two conditions is highly significant. 2. The overwintering survival rate of the seedlings in the plastic greenhouse shows also a relatively lower percentage compared with those under the field conditions. 3. The difference of the net assimilation rate among the three treatments in both species is extremely significant, the highest net assimilation of Chinese Pine's seedlings appeared in May and June, while that of the Chinese Arborvitae seedlings appeared in July and August. 4. The major factor which influences the net assimilation rate is the high temperature.