How to determine the distance between greenhouses?
The construction spacing of greenhouses is a comprehensive decision-making problem, which needs to balance the influence of many factors. Scientific and reasonable spacing can not only ensure the lighting and ventilation needs of crop growth, but also improve land use efficiency and production efficiency, and reduce production costs. The following are some of the main factors that affect the distance between greenhouses:
1. Light and shadow effects
Light is one of the basic conditions for crop growth, and the spacing of greenhouses must fully consider the greater use of natural light. The correct spacing of greenhouse ensures that even in winter, when the sun Angle is lower, the interior of the greenhouse can receive enough sunlight. At the same time, it is also necessary to take into account the shadow that may be generated by the adjacent greenhouse, so as to avoid reducing the light reception due to the overlapping of the greenhouse shadows. Usually, this needs to be determined by calculating the sun's altitude Angle at different times in different seasons.
2. Wind direction and ventilation
The local dominant wind direction has a significant impact on the ventilation of the greenhouse, which is not only related to the adjustment of the climate in the greenhouse, but also directly affects the prevention and control of diseases. Proper spacing promotes air circulation and provides essential carbon dioxide to crops, while also contributing to humidity control and disease reduction. In addition, the greenhouse spacing should also allow cold air to flow and avoid excessive heat accumulation in the greenhouse area.
3. Operation and management
The space between the greenhouses not only needs to meet the lighting and ventilation requirements, but also should allow the passage of personnel and mechanical equipment. This involves the ease of daily management and maintenance operations, including planting, fertilization, harvesting and so on. Reasonable spacing can reduce labor intensity and improve working efficiency.
4. Topography and landforms
Terrain and geomorphic conditions are factors that cannot be ignored when determining the spacing of greenhouses. In the case of sloping or uneven ground, the spacing between greenhouses may need to be adjusted to ensure the stability of the structure and the consistency of the crop growing environment. Areas with higher gradients may require increased spacing or terraced layout to adapt to terrain conditions and ensure the stability of the greenhouse and the needs of crop growth.
