一、阳畦育苗。这是各地普遍采用的一种方式。它由风障、畦框、覆盖物三部分组成,是依靠太阳辐射能提高畦内的温度并由覆盖物来保持温度。畦内的小气候状况是随着外界气候的变化而变化,其防寒保温性能决定于两个因素:一是本身结构和覆盖物的保温性能;二是日照时间长短和光照强度。3月份即随着外界温度的上升而开始升高。因此阳畦的 First, Yang Zhen nursery. This is a widely adopted approach. It consists of wind barriers, 畦 frame, covering three parts, is to rely on solar radiation can increase the temperature inside the 并 and cover to keep the temperature.小 microclimate situation is with the changes in the external climate changes, its cold insulation properties are determined by two factors: First, its own structure and insulation properties of the cover; the second is the duration of sunshine and light intensity. In March, the temperature started to rise as the outside world started to rise. So Yang’s