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承德地区坡耕地低产田面积很大,经调查全区亩产150公斤左右的低产田有350万亩,占实有耕地66.7%。这些低产田多数分布在中北部的山岗坡地上,除自然气候条件较差外,主要是长期经受风蚀、水蚀,形成土层薄、保墒差、肥力低,自然降水不能充分利用,制约着粮食单产的提高。为加快改造坡耕地低产田,1990年全区对部分坡耕地,采用工程、农艺与生物措施相结合的配套技术,进行坡耕地改造的试验、示范,收到了改土、蓄水、聚肥的显著效果,使原来不能种植玉米的坡耕地种上了玉米,单产大幅度提高。1991年全区推广面积31.64万亩,平均亩产达到357.8公
Chengde area slopes of low-yield land area is very large, surveyed throughout the region about 150 kilograms per mu low-yield farmland 3.5 million mu, accounting for 66.7% of the cultivated land. Most of these low-yielding fields are located in the hillsides of the central and northern part of the country. Except for natural and climatic conditions, they are subject to long-term wind and water erosion, water thinning, thin soil layers, poor soil moisture, low fertility and natural precipitation, which restrict the grain Yield improvement. In order to speed up the transformation of low-yield farmland on sloping fields, the whole area experimented and reformed sloping farmland on part of sloping farmland in 1990 through the combination of engineering, agronomic and biological measures, and received suggestions on soil improvement, water storage and co-fertilizer Significant effect, so that the original cultivation of corn can not be planted on the slope of corn, a substantial increase in yield. In 1991, the entire area of promotion was 316,600 mu, with an average mu yield reaching 357.8 km