Convenient transportation and sunny ventilation are required. The purpose of pear cultivation in greenhouse and greenhouse is to promote cultivation and early maturity. Therefore, the location is as close as possible to the suburbs of the market, which is also convenient for the management of sightseeing orchards. Pear orchard soil requires deep and fertile soil layer, loose and breathable, pH value of 5.8 ~ 8, and low groundwater level. In coastal typhoon-prone areas, scaffolding for open-field facility cultivation also has broad application prospects.
(2) Building greenhouses according to local conditions.
In the south, greenhouses are used to build gardens. In Wenling, Zhejiang, the seedlings were built 2-3 years after planting. The facility used here is a mixed multi-span greenhouse with cement columns and bamboo arches. The greenhouse roof is 3.8 meters high, the shoulder height is 2.5 meters, and the width of a single building is 8 meters (one in two rows) and the length is 30 meters. The total area of greenhouse is 1800 m2, and the scaffolding is covered with PVC long-life film or vinyl acetate film.
Sunlight greenhouse is used in the north, made of bamboo, steel and mixed materials. There are two main types: one is inclined, the other is vertical and the other is arched. A sloping and vertical film greenhouse was developed on a slope. The building orientation of the greenhouse extends from east to west, and the length is generally 60 ~ 100 meters. When fruit trees are cultivated, the ridge height is generally 2.5 ~ 3.5 meters, and the yield is mostly 2.5 ~ 2.8 meters. The height of the vertical window is greater than1.2m, and the span is 6.5 ~ 7.5m.. The angle between the lighting ceiling and the horizontal plane is 16.5 ~ 33.5, and 16 is mostly used in the area around 40 north latitude.
(3) Reduce the cost of building greenhouses as much as possible. You can use local materials and simplify the complex.