论文部分内容阅读
为系统地比较贺兰山东麓荒漠-绿洲交错带扬黄新灌区不同土地利用方式对土地退化防治的作用机制,提炼区域土地退化防治的一般模式,采用社区调查和野外调查相结合的方法,综合分析了园艺村不同土地利用方式在限制性资源调集和分配、土壤理化性质改良等方面的作用。相对原生荒地对照,耕地(玉米/小麦套作)土壤养分和盐分发生表聚现象,园地(葡萄)40～60cm土层养分和盐分明显富集。菌草产业的资源调集能力巨大,菌菇废料有效养分含量高而均衡,但是全盐含量明显偏高。相对早期单一的粮食种植结构,葡萄和菌草产业的发展有力推动了园艺村土地退化防治实践。葡萄产业代表了一种原位的土地适宜性利用推动土地退化防治的模式,而菌草产业代表了一种拓展性土地集约利用引导土地退化防治的模式。
In order to systematically compare the mechanism of different land use patterns on land degradation prevention and control in the desert-oasis ecotone between north and east of Helan Mountain and to refine the general pattern of land degradation prevention and control in the eastern foot of Helan Mountain, use the combination of community survey and field survey This paper analyzes the role of different land use patterns in horticultural villages in limiting resource mobilization and distribution and improving soil physical and chemical properties. Compared with the native wasteland control, the nutrients and salinity in the cultivated land (corn / wheat intercropping) aggregated and the nutrients and salinity in the 40 ~ 60cm soil layer of the field (grape) were obviously enriched. The fungus industry resource mobilization ability is huge, mushroom nutrient content is high and balanced, but the whole salt content is obviously high. Relative to the early single grain planting structure, the development of grapes and grass larvae industry has promoted the practice of land degradation prevention and control in horticultural villages. The grape industry represents a model of in situ use of land suitability to promote land degradation prevention and control, and the grass industry represents a model of extended land intensive use to guide land degradation prevention.