北方圈舍采光的合理与否,直接关系到饲养动物的生产力和养殖业主的经济效益。(一)暖棚圈舍1.单斜面暖棚圈舍。北方暖棚圈舍主要考虑冬季达到最佳采光。如式一(附后,下同),设暖棚采光面与地面交角为α,采光面方位为正南方,当地的纬度为Φ,则根据几何与地理知识推得,当地冬至日正 The rational lighting of the North Pushes or not, is directly related to the productivity of animal husbandry and breeding owners of the economic benefits. (A) warm sheds 1. Single beveled warm sheds. North warm pens mainly consider winter to achieve the best lighting. For example, in formula 1 (attached, same below), the angle between the lighting surface of the greenhouse and the ground is α, the direction of the lighting surface is to the south and the local latitude is Φ. Based on the geometric and geographical knowledge, the local solstice is positive