| 徐德兰,朱学莲,王凯杰.龙脊梯田土地利用模式对土壤持水力影响研究[J].安徽建筑大学学报,2023,31(2):40-44，50 |
| 龙脊梯田土地利用模式对土壤持水力影响研究 |
| Study on the Influence of Land Use Pattern on Soil Water Holding Capacity in Longji Terrace |
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| DOI： |
| 中文关键词: 土地利用 土壤持水力 最大持水率 龙脊梯田 |
| 英文关键词: land use water holding capacity maximum water holding capacity Longji terrace |
| 基金项目:国家重点研发计划项目（2019YFC0507500）；桂林市科学研究与技术开发计划重大专项项目（20180102-2） |
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| 中文摘要: |
| 土壤水分是土壤生态系统中养分循环与流动的重要载体，是植物生长及生态环境建设的关键影响因子。以龙脊梯田金坑红瑶景区为对象，研究其林地、旱地、水田和抛荒地 4 种土地利用模式 0 ~ 5 cm 表层土壤的物理性质，分析各类土地表层土壤的持水能力。结果表明，4 种土地利用模式下，表层土壤的土壤容重范围为0.45 ~ 1.02 g/cm3，最大持水率范围为 42.12% ~ 90.92%，土壤非毛管孔隙度范围为 18.93% ~ 43.62%。Spearman相关性分析表明，各类土地表层土壤的最大持水率与土壤容重呈极显著负相关（r = -0.911，P < 0.01），与土壤非毛管孔隙度呈极显著正相关（r = 0.839，P < 0.01），与植被覆盖度呈一般显著正相关（r = 0.583，P < 0.05）。土壤最大持水率排序依次为：林地 > 抛荒地 > 水田 > 旱地。 |
| 英文摘要: |
| Soil moisture is an important carrier of nutrient cycling in the soil ecosystem，and is a key influencing factor for plant growthand ecosystem construction. Taking Jinkeng Hongyao Scenic Spot in Longji Terrace as an object，the physical properties of surface soil(0 ~ 5 cm depth) under four land use patterns：woodland，dry land，paddy field and abandoned farm field were studied to analyzetheir water holding capacity. The results show that the bulk density of surface soil under four land use patterns ranged from 0.45 to 1.02g/cm3；the maximum water holding capacity ranged from 42.12% to 90.92%；the soil non-capillary porosity ranged from 18.93% to43.62%. Spearman’s correlation analysis shows that for the surface soil of four land use patterns，the maximum water holding capacityhas an highly negative correlation with bulk density (r = -0.911，P < 0.01)，an highly positive correlation with soil air-filled porosity(r = 0.839，P < 0.01)and an positive correlation with vegetation coverage (r= 0.583，P < 0.01). The maximum water-holding rate of soil isas follows：forest land > abandoned farm field > paddy field > dry land. |
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