| 引用本文: | 杨 绪,赵廷超,王 丰,等.基于Gardner模型的黔西南土壤水分特征分析[J].灌溉排水学报,2018,37(7):35-42. |
| YANG Xu,ZHAO Tingchao,WANG Feng,et al.基于Gardner模型的黔西南土壤水分特征分析[J].灌溉排水学报,2018,37(7):35-42. |
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| 摘要: |
| 【目的】了解黔西南州不同地区土壤剖面(0~60 cm)持水特性的差异。【方法】在实验室内利用压力膜仪法测定了各土壤的水分特征曲线，并分析其土壤水分特征。【结果】黔西南州各植烟县不同土层土壤水分特征曲线匀可采用Gardner模型拟合，不同烟区土壤水分常数及持水特性有明显差异。其中兴义、贞丰、安龙和普安土壤持水性能强弱表现为40~60 cm>20~40 cm>0~20 cm，晴隆和兴仁烟区土壤持水性能表现为20~40 cm>40~60 cm>0~20 cm；各植烟县烟田0~20 cm土层土壤持水性强弱顺序为兴义，安龙，晴隆，贞丰，普安和兴仁；20~40 cm土层土壤的持水性强弱顺序为兴义，安龙，晴隆，兴仁，贞丰和普安；40~60 cm土层土壤的持水性强弱顺序为兴义、安龙、普安、晴隆、贞丰和兴仁。【结论】同一植烟县深层土壤持水能力强于表层土壤，不同植烟县间的土壤持水性也存在明显差异。 |
| 关键词: 黔西南州； Gardner模型； 保水抗旱； 土壤水分特征曲线； 土壤持水特性 |
| DOI：10.13522/j.cnki.ggps.2017.0505 |
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| Water Retention Characteristics of Typical Soils in Southwestern Guizhou Province |
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YANG Xu， ZHAO Tingchao, WANG Feng, SHAO Xiaohou, GUO Yali, LI Minhui,CHANG Tingting, GUANG Jianfang, WU Wenbo
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Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-water Environment in Southern China, Ministry of Education(Hohai University), Nanjing 210098, China;College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098 China; Tobacco Company of Qianxinan Prefecture, Xingyi 562400, China
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| Abstract: |
| 【Objective】 Water retention characteristics is a soil quality indicator, and this paper presents the water retention curves measured from typical soils in southwestern Guizhou Province. 【Method】 Soil samples from 0~60 cm were taken from tobacco fields and their water retention curves were measured in laboratory using pressure membrane apparatus. 【Result】 All measured water release curves can be fitted to the Gardner formula but the model parameters varied. Overall, the water-holding capacity of the subsoil is higher than that of the top soil. For soils in Xingyi, Zhenfeng Anlong and Puan, their water-holding capacity at different depths was ranked in 40~60 cm>20~40 cm>0~20 cm, while for soils in Qinglong and Xingren, it was in the order of 20~40 cm>40~60 cm>0~20 cm. Spatially, the water holding capacity of soils in 0~20 cm and 20~40 cm ranked in Xingyi>Anlong>Qinglong>Zhenfeng>Puan>Xingren, while of the soil in 40~60 cm was order in Xingyi>Anlong>Qinglong>Xingren>Zhenfeng>Puan. 【Conclusion】 The water retention characteristics are spatially variable and the results presented in this paper can be used as refences in designing irrigation schedules for this region. |
| Key words: southwestern Guizhou Province; Gardner formula; water conservation and drought resistance; soil water retention curves; soil water holding characteristics |
