The relationship between soil water potential and water content of two soils
WU Yanyou1,2,3, HU Linsheng1,2, GU Ruizhi1,2, WU Yansheng1,2, LI Minghong1,2
1.Institute of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2.Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 3.Research Center for Environmental Bio-Science and Technology, State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550002, China
Abstract：Soil moisture characteristic curves of the two species of soils were researched. Based on the Gibbs free energy,the model of soil water potential and water content was founded. As loam and loam clay were two common soils, the relationship between soil water potential and moisture losing time with four soil water levels was monitored, and Logistic equation was used to fit the relationship between soil water potential and water content. The results showed that the established model based on Gibbs free energy was quite feasible since the relationship between soil water potential and moisture losing time can be well fitted by Logistic equation. And the relationship between water content(calculated by the model of soil water potential and water content)and moisture losing time can be well fitted with Logistic equation. The field water capacity of loam clay was 11.6% higher than that of the loam. However,the time point when water content of loam decreased to wilting moisture was later than that of the loam clay, which indicated that the water-holding capacity of the loam was obviously higher than that of the loam clay. This research could provide the real-time irrigation technical support for the information of crop water demand.
吴沿友,,, 胡林生,, 谷睿智,, 吴沿胜,, 黎明鸿,. 两种土壤含水量与水势关系[J]. 排灌机械工程学报, 2017, 35(4): 351-356.
WU Yanyou,,, HU Linsheng,, GU Ruizhi,, WU Yansheng,, LI Minghong,. The relationship between soil water potential and water content of two soils. Journal of Drainage and Irrigation Machinery Engin, 2017, 35(4): 351-356.
[1]ARASAN S,AKBULUT S,HASILOGLU A S.The relationship between the fractal dimension and shape properties of particles[J].Journal of civil engineering,2011,15(7):1219-1225.[2]刘彬,罗承德,张健,等.干旱河谷-山地森林交错带土壤水分与养分特征[J].生态学报,2011,31(1):58-66. LIU Bin,LUO Chengde,ZHANG Jian,et al. Soil nutritional properties and moisture gradient of the ecotone between dry valley and montane forest of the Minjiang Ri-ver [J]. Acta ecologica sinica, 2011,31(1):58-66.(in Chinese)[3]LOREAU M, NAEEM S, INCHAUSTI P, et al. Biodiversity and ecosystem functioning: current knowledge and future challenges [J]. Restoration ecology,2001, 294(5543): 804-808.[4]RUBIO A, ESCUDERO A. Small-scale spatial soil-plant relationship in semi-arid gypsum environments[J].Plant and soil, 2000, 220(1/2):13-150.[5]李春友,任理,李保国. 利用优化方法求算Van Genuchten方程参数[J].水科学进展,2001,12(4):473-478. LI Chunyou, REN Li, LI Baoguo. Parametric estimation of the Van Genuchten′s Equation by the optimization method[J]. Advances in water science,2001,12(4):473-478.(in Chinese)[6]ŠIMU。NEK J, JARVIS N J, VAN GENUCHTEN M T, et al.Review and comparison of models for describing non-equilibrium and preferential flow and transport in the vadose zone [J]. Journal of hydrology, 2003, 272(1):14-35.[7]姚其华,邓银霞.土壤水分特征曲线模型及其预测方法的研究进展[J].土壤通报,1992,23(3):142-145. YAO Qihua, DENG Yinxia. The research of soil water characteristic curve model and its forecast method[J]. Chinese journal of soil science,1992,23(3):142-145.(in Chinese)[8]VAN GENUCHTEN M T. A closed-form equation for predicting the hydraulic conductivity of unsaturated soils[J]. Soil science society of America journal Am J, 1980,44(5):892-898.[9]SHAO M A,HORTON R. Integral method for estimating soil hydraulic properties [J]. Soil science society of America journal, 1998,62(3): 585-592.[10]邹朝望,薛绪掌,张仁铎. 基于两组负水头入渗数据推求 Brooks-Corey 模型中的参数[J]. 农业工程学报,2006,22(8):1-6. ZHOU Chaowang, XUE Xuzhang, ZHANG Renduo. Estimating Brooks-Corey model parameters based on soil water infiltration data under two kinds of negative water pressures[J]. Transactions of the CSAE, 2006, 22(8):1-6.(in Chinese)[11]刘继龙,马孝义,张振华,等. 基于联合多重分形的土壤水分特征曲线土壤传递函数[J]. 农业机械学报,2012,43(3):51-56. LIU Jilong, MA Xiaoyi, ZHANG Zhenhua, et al. Pedotransfer functions of soil water retention curve based on joint multifractal [J]. Transactions of the CSAM, 2012,43(3):51-56.(in Chinese)[12]JACKSON R D, KUSTAS W P, CHOUDHURY B J. A reexamination of the crop water stress index [J]. Irrigation science,1988,9(4):309-317.[13]LAMBOT S, WEIHERMÜLLER L, HUISMAN J A, et al. Analysis of air-launched ground-penetrating radar techniques to measure the soil surface water content [J]. Water resource research, 2006, 42(5):114-119.[14]KELLENERS T J, SOPPE R W O, AYARS J E, et al. Calibration of capacitance probe sensors in a saline silty clay soil [J]. Soil science society of America journal, 2004, 68(5):770-778.[15]BINDLISH R, BARROS A P. Multifrequency soil water inversion from SAR measurements with the use of IEM [J]. Remote sensing of environment, 2000, 71(1): 67-88.[16]PENMAN H L. Natural evaporation from open water, bare soil and grass. [J]. Mathematical and physical sciences, 1948, 19(3): 120-146.[17]PRICE D T, BLACK T A. Estimation of forest transpiration and CO2 uptake using the Penman—Monteith equation and a physiological photosynthesis model[J]. Estimation of areal evapotranspiration, 1989, 17(2):213-227.[18]张颖. 吉布斯自由能的多功能性质探讨[J].大学化学,2011,26(2):67-72. ZHANG Ying. The research on the multi functional properties of Gibbs free energy[J]. University chemistry,2011,26(2):67-72.(in Chinese)[19]皱文安,姜波,顾李华.土壤水分常数的测定[J].水文,2015,35(4):62-66. ZHOU Wenan, JIANG Bo, GU Lihua. Measurement of soil moisture constants[J]. Journal of China hydrology, 2015,35(4):62-66.(in Chinese)
