草业科学2025，Vol.42Issue(7)：1620-1631,12.DOI:10.11829/j.issn.1001-0629.2024-0687
基于DNDC模型的柴达木梭梭林国家级自然保护区枸杞种植生态影响及恢复策略评估
Assessment of ecological impacts of Lycium barbarum planting and restoration strategies in the Qaidam Haloxylon National Nature Reserve based on the Denitrification-Decomposition model
摘要
Abstract
The aims of the present study were to clarify the ecological impacts of replacing natural Haloxylon ammodendron vegetation with artificial Lycium barbarum cultivation in the Qaidam Haloxylon National Nature Reserve and to propose restoration strategies.A simulation analysis of the ecological effects of replacing natural H.ammodendron with artificially planted L.barbarum was conducted in the Dulan Protection Zone of the Qaidam Haloxylon National Nature Reserve using the Denitrification-Decomposition(DNDC)model.The aboveground biomass and greenhouse gas(GHG)emission determination coefficients(R2)for L.barbarum and H.ammodendron were 0.92 and 0.96,respectively.The average total biomass of H.ammodendron(2 150 kg·ha-1)was significantly lower than that of L.barbarum(2 738 kg·ha-1)(P＜0.05)However,its water use efficiency(11.0 kg·m-3)and soil carbon sequestration(1 119 kg·ha-1,CO2 eq)were significantly higher than those of L.barbarum(6.5 kg·m-3,536 kg·ha-1,CO2 eq)(P＜0.01).Furthermore,the global warming potential(GWP)of H.ammodendron(4 137 kg·ha-1,CO2 eq)was significantly lower than that of L.barbarum(5 504 kg·ha-1,CO2 eq)(P＜0.05).As L.barbarum cultivation expanded,regional water use efficiency and soil carbon sequestration decreased,whereas the GWP generally increased.Scenario simulations revealed that restricting L.barbarum cultivation expansion could reduce water consumption by 15.2％,while improving irrigation efficiency,and it could enhance water use efficiency by 18.7％and reduce GHG emissions by 12.5％.Prioritizing H.ammodendron forest restoration could increase soil carbon sequestration by 32.4％and decrease global warming potential by 25.8％.The comprehensive simulation results indicate that preserving native vegetation,such as H.ammodendron,should be the primary strategy for combatting climate change and preventing land desertification.In the short term,implementing water-saving irrigation practices is recommended.In the medium to long term,a combination of measures,including limiting L.barbarum cultivation and prioritizing Haloxylon forest restoration,is suggested.Additionally,integrating ecological compensation mechanisms and enhancing community participation can promote sustainable management and restoration of regional ecosystems.关键词
梭梭/枸杞/荒漠草原恢复/柴达木/反硝化分解模型(DNDC)Key words
Haloxylon ammodendron/Lycium barbarum/desert grassland restoration/Qaidam/Denitrification-Decomposition引用本文复制引用
陈冬勤,王波,杨永顺,韩明成..基于DNDC模型的柴达木梭梭林国家级自然保护区枸杞种植生态影响及恢复策略评估[J].草业科学,2025,42(7):1620-1631,12.基金项目
兵团重点领域科技攻关计划项目(2022AB016) （2022AB016）
