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摸清陕北黄土区植被的类型与区划,能为全国植被区划及自然与农业区划提供科学依据。陕北黄土区以延安为界,北至长城为暖温带森林草原地带,可分为志丹——府谷森林草原省和白玉山地灌丛草原省,南至铜川为暖温带落叶阔叶林地带,只有黄陵——延长为落叶阔叶林省。南部地带性植被为松栎林型的落叶阔叶林,北部为温性和暖温性草原、温性落叶灌丛及松栎林型的落叶阔叶林。森林草原地带属于温带草原地区,并与落叶阔叶林地区接壤。这里地带性植被类型的趋异性,反映了森林和草原之间过渡地带植被的特征,是植被长期适应过渡地带气候及土壤与地形条件的结果。
Finding the types and zoning of vegetation in the loess region of northern Shaanxi can provide a scientific basis for the national zoning and the zoning of nature and agriculture. The northern Shaanxi Loess Plateau is bounded by Yan’an and the north by the Great Wall as the warm temperate forest grassland zone. It can be divided into the Zhidan-Fugu Forest Grassland and the Baiyu Mountain Shrubby Prairie Province, while the southward to Tongchuan is the warm temperate deciduous broad-leaved forest zone , Only the Huangling - extended to deciduous broad-leaved forest province. The southern zonal vegetation is pine-oak-forest deciduous broad-leaved forest, with warm temperate and warm-temperate grassland, temperate deciduous shrub and pine-broadleaf deciduous forest in the north. The forest steppe belongs to the temperate steppe area and bordering the deciduous broadleaf forest area. The divergence of zonal vegetation types here reflects the characteristics of vegetation in the transitional zone between forest and grassland and is the result of long-term adaptation of vegetation to the transitional zone climate and soil and topography.