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。
[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 pres- sure 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〉Qin-glong〉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.
作者
杨绪
赵廷超
王丰
邵孝侯
郭亚利
李敏慧
常婷婷
广建芳
吴问波
YANG XU;ZHAO Tingchao;WANG Feng;SHAO Xiaohou;GUO Yali;LI Minhuil,;CHANG Tingting;GUANG Jianfang;WU Wenbo(Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-water Environment in Southern China, Ministry of Education(Hohai University), Nanj ing 210098, China;College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098 China;Tobacco Company of Qianxinan Prefecture, Xingyi 562400, China)
出处
《灌溉排水学报》
CSCD
北大核心
2018年第7期35-42,共8页
Journal of Irrigation and Drainage
基金
贵州省烟草公司黔西南州公司科技项目(JS-JL-11/D[2015]41号)
江苏省研究生科研与实践创新计划项目(SJCX17_0129
SJZZ16_0083)
国家自然科学基金项目(51509068)
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
southwestern Guizhou Province
Gardner formula
water conservation and drought resistance
soilwater retention curves
soil water holding characteristics