草地管理对土壤碳截获的影响

Effect of Grassland Management on Soil Carbon Sequestration

综述放牧、开垦、施肥、补播等管理措施对草地土壤碳截获的影响。通过研究建议:(1)优化放牧制度和牲畜饲养管理能够有效保护草地覆被、提高饲草资源利用效率、直接或间接地增加土壤碳截获。(2)合理布置农牧业格局,深化农副产品饲料化利用。对不适宜作物种植的土地果断退耕恢复草地植被,发展草田轮作、间作,在休耕期种植覆盖饲草作物,可期待有效保护土壤地力和增加土壤有机碳储量。(3)施加有机肥料对提高草地土壤碳截获有巨大潜力。(4)草地补播,尤其进行豆科植物补播可期待有效提高土壤碳截获。

The effects of management measures such as grazing,reclaimation,fertilization and reseeding on soil carbon storage dynamics were summarized. By this study,it was suggested：（1）improved grazing regime and livestock feeding could effectively protect grassland vegetation,and enhance the forage utilization efficiency,which will directly or indirectly increase soil carbon sequestration.（2） reasonable layout of agriculture and animal husbandry,and deep utilization of subsidiary agricultural products as fodder,and conversion from untillable land into grassland,and development of rotation and intercropping between grass and crop,and plantation of cover crop,all which could protect soil fertility and increase soil carbon storage.（3）organic fertilizer could be greatly potential to be applied for increasing soil carbon sequestration.（4）reseeding,in particular introduction of legume into grassland could be expected to enhance soil carbon sequestration.