论文部分内容阅读
本试验对西洋参荫棚内温度日变化进行观测，同时对不同棚式和不同遮荫材料进行温度和光照强度试验。结果表明，发生日的病株的叶面温度至少比健株叶面温度高０．０８℃；午后，参棚内温度急剧下降，晴天叶温高于气温和土温，阴天土温低于叶温和气温。一面坡斜棚覆盖白色网膜加松枝降温效果最明显。一面坡斜棚受强辐射面积过大，受光面积不均匀，人字棚中央受光最合理，均匀。根据试验，本文提出皖西山区栽培西洋参宜采用高平棚活动薄膜顶帘，小块地可采用拱型双畦大棚，以透光透雨的双透棚为主，雨季改双透为透光的单透棚，床面加以枯叶覆盖，达到最佳降温效应。
In this experiment, the daily variation of temperature in American ginseng shade was observed. At the same time, the temperature and light intensity of different shades and different shade materials were tested. The results showed that the leaf temperature of the diseased plants on the occurrence day was at least 0.08 ℃ higher than that of the leaf surface of the healthy plants. In the afternoon, the temperature in the canopy decreased sharply. The sunny leaf temperature was higher than the air temperature and soil temperature, Leaves mild temperature. Inclined sloping sheds cover the white omentum and Pine branch cooling effect is most obvious. Slope inclined shed by a strong radiation area is too large, uneven light receiving area, the central shelves of the light received the most reasonable and uniform. According to the experiment, this paper proposes that cultivated American ginseng in the west of Anhui Province should adopt the movable curtain top curtain of Gaoping canopy, and the double-shed canopy can be adopted in small areas. The double permeable shed with permeable and permeable rain is the main type. Through the shed, the bed covered with dead leaves, to achieve the best cooling effect.