节点文献
石漠化地区土壤界面水氮耦合研究进展
Research Progresses on Water Nitrogen Coupling under Soil Interface in Rocky Desertification Areas
【摘要】 为探讨石漠化地区土壤界面下的水氮耦合影响因素,本文从石漠化程度、地形异质性、植被恢复措施和土地利用4个方面进行综述,总结出土壤水分和氮素的迁移规律。(1)轻度石漠地区含水量和土壤氮含量较高,导致植物内养分运输快,水氮耦合效果最佳;其次是重度石漠地区;中度石漠地区通常是耕地聚集地,其土壤水氮含量较低,水氮耦合效果也最差。(2)随着海拔的降低,土壤水氮耦合效应增强,但这种效应随土壤深度的增加而减弱;不论是在高原的山地、峡谷、盆地还是洼地,石漠化地区的土壤水分和养分的流失都十分严重;不同植被恢复类型和恢复年限对当地的土壤水及氮素均有影响。(3)植树造林显著提高石漠化土壤的含水量和全氮含量;退耕还林不仅提升土壤肥力和环境质量,还有助于土壤氮库恢复和碳氮平衡维持;封山育林能在一定程度上改善土壤中的氮含量。(4)不同的耕地利用类型和作物选用都会对水氮耦合产生影响;园地通过减少翻耕次数,导致土壤紧实化,从而提高水土保持效果。根据以上研究,今后可针对综合治理策略、生态恢复与水资源综合管理策略、高效植被恢复策略、优化土地管理和利用策略等方面开展研究。
【Abstract】 To explore the factors influencing water-nitrogen coupling beneath the soil interface in stony desertification areas, this paper reviews four aspects: the degree of stony desertification, topographic heterogeneity, vegetation restoration measures, and land use, summarizing the migration patterns of soil moisture and nitrogen.(1)In lightly stony desertified areas, higher moisture and nitrogen levels lead to rapid nutrient transport in plants and optimal water-nitrogen coupling; heavily stony areas follow, while moderately stony areas, often agricultural hubs, exhibit lower moisture and nitrogen levels, resulting in the poorest coupling effects.(2)Water-nitrogen coupling increases with decreasing altitude, though this effect diminishes with increasing soil depth; significant loss of soil moisture and nutrients occurs across highland mountains, valleys, basins, and depressions; different vegetation restoration types and durations impact local soil moisture and nitrogen levels.(3)Afforestation significantly enhances soil moisture and total nitrogen in desertified soils; converting cropland to forest not only improves soil fertility and environmental quality but also aids in restoring soil nitrogen reservoirs and maintaining carbon-nitrogen balance; reforesting mountain areas can moderately improve nitrogen content in soils.(4)Various land use types and crop selections affect water-nitrogen coupling; orchards reduce tilling frequency, leading to soil compaction and improved soil conservation.Based on these findings, future research can focus on integrated management strategies, ecological restoration and water resource management, effective vegetation restoration strategies, and optimizing land management and usage.
- 【文献出处】 西部林业科学 ,Journal of West China Forestry Science , 编辑部邮箱 ,2024年05期
- 【分类号】X171;S153
- 【下载频次】71