The main forms of cucumber cultivation in solar greenhouse

The solar greenhouse is a unique protection facility in China. Because it originates from the people and its structure is affected by its geographical location, there is no unified technical norm and standard. The structure of the solar greenhouse is not exactly the same in different regions. However, according to the shape of the front roof structure, the solar greenhouse can be divided into two types: semi-arched and one inclined and one vertical. The front roof is. The 1/4 circle, 1/4 ellipse, parabola and double arc solar greenhouses are called semi-arched solar greenhouses. The semi-arched solar greenhouse is divided into a short rear wall (less than 1 meter), a long back slope (2-3 meters), and a high rear wall (greater than the length and presence of the rear wall, and the length and length of the rear slope). 1.5m) short backslope (less than 2m), high back wall without backslope and long backslope (greater than 3m) without rear wall four types, but for cucumber production, the former three mainly.
The oblique-type vertical solar greenhouse was developed from a conventional one-slope vertical glass greenhouse. Since bamboo poles are used as the arch rods, the front roof is covered with a thin film and construction is relatively easy. Therefore, the span is expanded, and the front window is raised. The ridge is also properly raised. Such as a Wafangdian vertical solar greenhouse, a span of 8-9 meters, 2.4-2.5 meters high ridge, the front window 0.8 meters. However, the daylighting angle is small, the temperature rises slowly, and the insulation is also more difficult.
The vertical and horizontal greenhouses in Shenyang City and its north area span more than 6 meters, the front window is 0.6 meters high, and the ridge height is 2.3-2.4 meters. In the winter, only cold-resistant Yelai vegetables can be produced. The weather also needs temporary auxiliary heating. Since the mid-1980s, the daylighting and thermal insulation design of an inclined and vertical solar greenhouse has been improved several times.

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