黄土高原区退耕还林还草工程的土地利用变化与生态效应

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中图分类号：Q948 文献标志码：A 文章编号：2096-9902（2026）01-0045-04

Abstract：Thispaperdiscussesindepththelandusemodeloftheprojectofretuming farmlandtoforestandgrasslandin theLoessPlateauoverthepasttwodecadesanditsimpactonecologyAfterresearch，itwasfoundthatduetothepromotionof the project，thelandusepatermhasundergone profoundchanges.Amongthem，thecultivatedlandareahasbeenreduced by 5.6millionhectaresandthecoverageofforestsndgrassandshasalsoincreasedsignificantlyTheecologicalefectismainly reflectedintheenancementofsoilandwaterconservationcapabilities，thesoilerosionmodulushasbeenreducedbyorethan （20 70% ，andthenetprimaryproductivityofvegetationhasalsobeensignificantlyimproved.Theresearchnotonlyrevealsregional diferencesinecologicalefectsandpotentialpressreonwaterresources，butalsoprovidesscientificreferenceforotiizingecological restoration strategies.

Keywords：LoessPlateau;retumingfarmlandtoforestandgrassand;andusechange;ecologicalefect;ecologicalestoration

黄土高原是中国水土流失最为严重的生态脆弱区之一，土地长期过度垦殖造成了生态系统的严重恶化。（剩余5468字）