新世纪伊始，上海的蔬菜生产将以新的面貌出现，令人耳目—新。 ──工厂化育苗 在宽敞明亮的厂房里，人们通过各类保护设施，采用珍珠岩、萆炭等各种轻质材料作为育苗基质，来代替传统的自然土壤；用精量播种机代替人工播种，并根据幼苗需要，人工来控制和调节温、光、水、肥 At the beginning of the new century, the vegetable production in Shanghai will appear in a new appearance, which is refreshing. ─ ─ factory nursery plant in the bright and spacious factory, people through various protection facilities, using perlite, charcoal and other light materials as a nursery substrate to replace the traditional natural soil; with precision sowing machine instead of artificial sowing , And according to the needs of seedlings, artificial control and regulation of temperature, light, water, fertilizer