关键词: 捕食性天敌, 捕食性天敌, 拟环纹豹蛛, 前凹豹蛛, 小菜蛾, 捕食作用

Abstract: Abstract: In view of the problems of poor heat preservation performance, low land utilization rate, weak resistance to natural disasters, short service life and low level of standardization in the existing solar greenhouse in Hebei Province, new heterogeneous composite wall solar greenhouse was designed and constructed and the inspection instrument was used to measure the thermal insulation performance. Shale solid bricks and shale porous bricks were screened as load-bearing material of the heterogeneous composite wall of solar greenhouse. Phenolic board, HD-STP vacuum insulation board and cement-based composite insulation mortar were screened as wall insulation materials. Extruded polystyrene board was screened as back roof insulation material of solar greenhouse. Four types of the heterogeneous composite wall solar greenhouse were designed and constructed with a net span of 10m and a height of 4.5m. They are built with shale solid brick or shale porous brick. The exterior wall plastered phenolic board, HD-STP vacuum insulation board or wiping insulation mortar as the insulation board. The wall was built of 37cm shale solid red brick and 5cm phenolic board. Its heat-transfer coefficient is 0.05W / m2.K. It has the smallest heat transfer coefficient and the best thermal insulation properties. The wall of winter warm type Ⅱ solar greenhouse was built of 2.9m bottom and 1.5m top clay soil . Its heat-transfer coefficient was 0.12W / m2.K. It ranked no. 2. The 3rd wall was built of 37cm shale porous brick and 5cm phenolic board. Its heat-transfer coefficient was 0.53W / m2.K. The 4th wall was built of 37cm shale porous brick and 1cm STP vacuum insulation board. Its heat-transfer coefficient was 0.60W / m2.K. The 5th wall was built of 37cm shale solid red brick and 5cm insulation mortar. Its heat-transfer coefficient was 1.53W / m2.K. The heterogeneous composite wall consists of 37cm shale solid red brick and 5cm thick phenolic board, which has good thermal insulation and thermal storage properties and is superior to the wall of winter warm type II solar greenhouse. The heterogeneous composite wall solar greenhouse can completely replace winter warm type II solar greenhouse.