论文部分内容阅读
利用日光温室,冬季生产芹菜,春季生产黄瓜,夏季生产菜花,一分地可以收入一千元以上,是农民致富的好门路。但日光温室多大、多高合适呢? 通过各地菜农多年实践证明,面积以30米长、6.5米宽为宜。这样的棚不仅充分利用了建筑物料,而且面积适中(二分九厘),便于管理。如果过长,不仅管理不方便,更重要的是,前期开门放风时,棚的中部总有一个热气带存在,不利此处植株的生长和发育。如果过窄,不仅面积缩小,而且不易保温,尤其是遇寒流时,对植株影响更大。棚越小,边际植株相对越多,受外界温度影响越大。无数实例证明,一个日光温室的面积,以3分为最适宜。
The use of solar greenhouse, the production of celery in winter, spring production of cucumber, cauliflower production in summer, can earn a thousand dollars a minute, is a good way for farmers to get rich. But how big the solar greenhouse, how high it? Through years of proven practice of vegetable farmers, an area of 30 meters long, 6.5 meters wide is appropriate. This shed not only makes full use of building materials, but also a moderate area (two nine percent), easy to manage. If it is too long, it is not only inconvenient to manage but more importantly, there is always a hot zone in the middle part of the shed when the door is drained in the early stage, which is disadvantageous for the growth and development of the plant here. If it is too narrow, not only the area is reduced, but also not easy to heat, especially in case of cold flow, the greater impact on plants. The smaller the shelf, the more the marginal plants, the greater the impact of external temperature. Numerous examples show that the area of a solar greenhouse, with 3 points for the most appropriate.