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陕北地处高寒山区,冬季—10℃气温持续时间长,生产面临诸多技术问题,成为限制提高日光温室效益发挥的瓶颈。夏秋季面临温度高,多暴雨冰雹大风天气,后期又遇气温下降快,病虫害为害严重的恶劣气候,多年来,秋延后生产未能成功,一年一大茬,效益难以提高与发挥。笔者1995～1997年在陕北安塞试验推广一年二收高效生产模式,即前茬为冬春茬黄瓜,后茬为秋延后番茄,1997年收益达4.17万元。现将具体做法介绍如下:
Northern Shaanxi is located in the alpine mountainous region. The winter temperatures of -10 ℃ are long and the production is faced with many technical problems. This has become the bottleneck that limits the benefits of solar greenhouse. In summer and autumn, facing the weather with high temperature and heavy rain, hail and windy weather, the weather is experiencing a rapid decline in the later period, and the pests and diseases are severely harmed by bad weather. Over the years, the production has not been successful after the fall of autumn and the benefits have been hard to increase and exert. The author from 1995 to 1997 Ansai trial in northern Shaanxi to promote high yield one year harvest mode, that is, the former crop of winter and spring cucumbers, autumn after the fall of tomato, the return of 41,700 yuan in 1997. The specific practices are as follows: