论文部分内容阅读
我国利用塑料大棚培育树苗是最近几年才发展起来的,虽尚处于试验阶段,但已证明,塑料大棚育苗确是林木育苗技术上的一项重大革新,特别在三北地区对加速绿化步伐具有重要意义。这一先进育苗技术已在我省开始推广。为了促进塑料大棚育苗的发展,特根据我所一年来的初步试验结果,并参考有关资料,对塑料大棚育苗技术作如下介绍,以供参考。一、塑料大棚育苗的特点(一)大棚的小气候效益1.光照:塑料薄膜与玻璃相比,透光率略低(为80—85%),但大棚四面受光,光照时间
In our country, the use of plastic shed to cultivate saplings has only been developed in recent years. Although it is still in the experimental stage, it has been proved that plastic greenhouse nursery is indeed a major innovation in tree nursery technology, especially in the three northern regions to accelerate the pace of afforestation Significance. This advanced seedling technology has been started in our province to promote. In order to promote the development of plastic greenhouse nursery, special according to my year preliminary test results, and with reference to the information on plastic greenhouse nursery technology as follows for reference. First, the characteristics of plastic greenhouse nursery (A) the microclimate benefits 1. Greenhouse: plastic film compared with the glass, the transmission rate is slightly lower (80-85%), but the greenhouses by the light, light time