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新一轮的退耕还林还草工作正在开展,规模不断扩大,国土绿化面积逐年上升。这是生态保护工作的重要进度。同时,在此过程中,也出现了一些问题,比如人工林、人工草场生态系统脆弱、物种多样性降低、地下水位下降等。另外,除森林外,自然生态系统、动物栖息地、湿地、农田等面积都在缩小。这就引发了一个值得思考的问题:现阶段,我们是否需要进一步扩大退耕还林还草的规模?耕地,还是人工林、人工草场?
A new round of returning farmland to forest and grassland work is being carried out, expanding its scale and increasing its afforestation area year by year. This is an important progress in ecological protection. In the meantime, some problems have also emerged during the process, such as plantation forests, fragile artificial pasture ecosystems, decreased species diversity and declines in groundwater levels. In addition, in addition to forests, natural ecosystems, animal habitats, wetlands, farmland and other areas are shrinking. This raises a question worth considering: At this stage, do we need to further expand the scale of returning farmland to forest or grassland? Cultivated land, or plantation, artificial grassland?