In the construction of a greenhouse, it is important to determine the appropriate orientation, which is directly related to the growth of crops and the efficiency of photosynthesis.Different greenhouse types and geographical locations require different orientation strategies to ensure optimal light and ventilation.
Single arch shed and large span quilt arch shed usually use north and south extension.This layout results in a more uniform indoor light, with crops receiving adequate light on both sides of the east and west, and morning and afternoon light complementiating each other.At the same time, the north-south extension also helps ventilation and improves the air quality in the shed, which is beneficial to the growth of crops.
For single slope greenhouse, namely energy saving solar greenhouse, the use of sitting south, the main lighting surface should be to the south.This layout ensures that the greenhouse receives the most solar radiation in winter, raising the temperature inside the shed and promoting crop growth.However, at high latitudes or in areas with high morning fog and low temperatures, the orientation of the greenhouse can need to be appropriately west due to the later sunrise in order to make more use of the low afternoon light.On the contrary, in areas where winter is not cold, early morning light is good, and there is not much fog, the orientation of the greenhouse can be appropriately east to make full use of the weak light in the morning and improve the photosynthetic efficiency.
For the greenhouse, due to the characteristics of full light transmission at the top and around, the influence of the orientation on the indoor photothermal environment is relatively small.Factors such as ventilation and shading are mainly considered when determining the orientation of a terrain-house greenhouse.Generally, the indoor ventilation effect of the terrace greenhouse with the north-south direction of the roof is better, and the indoor shadow is relatively less.This layout is conducive to uniform light and ventilation of crops, improve the overall growth environment.
