黄土高原植被的发展分析

由一些概念,阐述了黄土高原植被发展的特点及其背景条件和依据。表明植被建设是植被发 展的前提,它其实和生态修复是一致的。植被建设具有多种环节,需要既突出植被的个性,又要强调 植被的整体性。在大面积的植被建设中,自然植被是基础,而人工植被是对它的补充、改良或完善,适 当而合理的配置是允许的。以农田为代表的人工植被有其正面积极意义。自然植被和人工植被以及 生态型植被和经济型植被,并非非此即彼,它们之间的中间类型植被有着较大的发展空间。植被建设 最终是要形成生态型植被为框架的景观格局。农区应当是人类生产经济活动的主要区域。与黄土高 原山区及城镇、工矿相比,农区是植被建设的关键。

Analysis on Development of Vegetation in Loess Plateau

From some conceptions, the characteristics of the Loess Plateau vegetation development as well as its background conditions and bases are dealt with. It is indicated that the vegetation construction in the Loess Plateau is the premise of the vegetation development, and actually coincides with the ecological rehabilitation discussed presently. That the vegetation construction is of various links would need both highlighting vegetation individuality and emphasizing vegetation entirety. In large -area vegetation construction, natural vegetation is a foundation, and artificial vegetation is a supplement, improvement or perfection to it; suitable and reasonable disposal of artificial vegetation would be'' allowable. Crop-representative artificial vegetation is positive and significant. Between natural vegetation and artificial vegetation or between vegetation for ecology and vegetation for economy, no complete limit exists. For their middle-type vegetation, there is a large expanding room. The vegetation construction expects that a landscape pattern taking vegetation for ecology as a frame would eventually be formed. The agricultural districts should be main ones for human productive activities for economy. Compared with mountain districts, cities, towns, factories and mines in the Loess Plateau, agricultural districts are crucial for the vegetation construction.