食用菌不含叶绿素,菌丝生长不需要阳光,尤其直射光对其生长不利。在子实体分化和生长时期,多数食用菌也仅需散射光。因此在栽培技术上,人工遮光是一项必不可少的措施。在以往的栽培中,室外栽培普遍采用草帘、草扇、茅草等物进行覆盖遮光。这些覆盖物成本高、劳动强度大,使用寿命短,急需进行改进。对此,本所从1988年开始,应用有色塑料薄膜在食用菌上进行覆盖遮光试验,1990年用黑色聚乙烯薄膜在香菇生产上进行覆盖试验获成功。以后又在金针菇、平菇、猴头菇 Edible fungus does not contain chlorophyll, mycelium growth does not require sunlight, especially direct sunlight on its growth adversely. During the differentiation and growth of fruiting bodies, most edible mushrooms only need to scatter light. Therefore, cultivation techniques, artificial shading is an essential measure. In the past cultivation, outdoor cultivation commonly used straw curtain, grass fan, grass and other things to cover the shade. These covers are costly, labor intensive, have short useful lives and are in dire need of improvement. In this regard, the Institute from 1988 onwards, the application of colored plastic film covering the light on the mushroom test, in 1990 with a black polyethylene film coverage in the mushroom production test was successful. Later in Flammulina, mushroom, Hericium