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1 土壤 (Soils), 2015, 47(4): DOI: /j.cnki.tr 不同土水比土壤浸提液与饱和泥浆电导率的比较研究 1,2 1* 2* ( ) ( ) Ece = EC Tse = (TS ) TS S156.4 [1 3] [4 5] [3] (ECe) [6] 25 [7 9] [10 11] ( ) ~ 842 mm (2009BAC55B BAD11B BAD11B02)948 (2011-G30) * (fpsong@126.com; jzs721@263.net) (1987 ) guoxinsong1028@163.com

2 % mm % 1.5 m 1 表 1 供试土壤部分物理性状参数统计 (n = 54) Table 1 Statistics of physical properties of tested soil (g/cm 3 ) (%) ( ) DDS-308A 0 ~ 40 cm 2 mm 10.0 g 100 ml CO ml 3 min (DDSJ- 308A ) EC EC EC EC [12] Wang [12] EC 1.. x = x n EC n 1 x = ερ w /((1 ε) ρ s ) ε ρ s ρ w [13] ECs () 3 min (DDSJ-308A ) ECs [1] 20 g CO 2 ( ) 6 h (DDSJ-308A ) ECe [2] mm g ml CO 2 3 min 500 ml 50 ml 100 ml 80 ~ ~ 110 (g/kg) = / TS TS TS TS TSe 1.3 Excel SAS % ~ 54.64% 45.14% 18

3 y = x R 2 = ( 1) ( 3 4) 图 1 饱和土壤溶液含水量与饱和泥浆含水量线性关系 (n = 18) Fig. 1 Linear relation between water contents of saturated soil paste and saturated soil solution 图 3 不同土水比土壤浸提液与饱和泥浆电导率 Fig. 3 ECs of saturated soil paste and saturated soil solutions under different soil/water ratios (ECs) (ECe) ECe ECs (R 2 = P 0.01) y = x ( 2) 图 4 不同土水比土壤浸提液与饱和泥浆土壤全盐含量 Fig. 4 TS contents of saturated soil paste and saturated soil solutions under different soil/water ratios 图 2 饱和土壤溶液电导率与饱和泥浆电导率线性关系 (n = 18) Fig. 2 Linear relation between ECs of saturated soil paste and saturated soil solution (SP) ( ECe ECs) ( )

4 ~ ~ EC1.. 5 ECe TS TSe ~ ( 1.. 5) ( ) ( 2) 表 2 不同土水比土壤浸提液与饱和泥浆电导率及土壤全盐含量的相关性 (n = 54) Table 2 EC and TS correlation between saturated soil paste and saturated soil solutions under different soil/water ratios EC EC EC EC ECe TSe TS 1: ** ** ** * ** ** TS 1: ** ** ** ** ** ** TS 1: ** ** ** ** ** ** TS 1: ** ** ** ** ** ** TSe ** ** ** ** ** ECe ** ** ** ** ** * P 0.05 ** P<0.01 ECe ~ EC ** ECe ~ TS1: ** TSe ~ TS ** TSe ~ EC ** ECe TSe ** ~ EC EC EC EC ECe ECe EC EC EC EC ~ ECe ~ EC ( 3) ECe ~ EC R 2 ECe ~ EC ECe EC ECe EC ECe = EC EC ECe

5 表 3 不同土水比的土壤浸提液与饱和泥浆电导率间拟合回归函数关系模型 (ms/cm) Table 3 EC regression model of saturated soil paste and saturated soil solutions under different soil/water ratios y = a + bx R 2 y = ax 2 + bx + c R 2 ECe EC y = x y = 0.056x x ECe EC y = 1.135x y = x x ECe EC y = x y = x x ECe EC y = x y = x x ECe EC [4] ECe EC1.. 5 (ECe = 8.24 EC ECe = 3.79 EC /SP ) [18] (ECe = EC ) ~ TS TS TS TS TSe ( 4) 表 4 不同土水比的土壤浸提液与饱和泥浆全盐间拟合回归函数关系模型 (g/kg) Table 4 TS regression model of saturated soil paste and saturated soil solutions under different soil/water ratios y = a + bx R 2 y = ax 2 + bx + c R 2 TSe TS 1:5 y = x y = x x TSe TS 1:2.5 y = x y = x x TSe TS 1:1 y = x y = x x TSe TS 1:0.5 y = x y = x x ~ TSe ~ TS TSe TS TSe TS TSe TSe TS R 2 TSe TSe TS TSe = (TS ) TS ) ( ) 2) ( ) ( ) ~ ) ~

6 4 817 ECe = EC TSe = (TS ) TS [1] Rhoades JD, Manteghi NA, Shouse PJ, Alves WJ. Estimating soil salinity from saturated soil-paste electrical conductivity[j]. Soil Science Society of America Journal, 1989, 53(2): [2] Heiniger RW, McBride RG, Clay DE. Using soil electrical conductivity to improve nutrient management[j]. Agronomy Journal, 2003, 95(3): [3] Adviento-Borbe MAA, Doran JW, Drijber RA, Dobermann A. Soil electrical conductivity and water content affect nitrous oxide and carbon dioxide emissions in intensively managed soils[j]. Journal of Environmental Quality, 2006, 35(6): [4],,. [J]., 1996, 27(6): [5],. [J]., 2001, 32(Z1): [6] Zhang H, Schroder JL, Pittman, JJ, Wang JJ, Payton ME. Soil salinity using saturated paste and soil to water extracts[j]. Soil Science Society of America Journal, 2005, 69(4): [7] Liu GM, Yang JS, Yao RJ. Electrical conductivity in soil extracts: Chemical factors and their intensity[j]. Pedosphere, 2006, 16(1): [8]. [J]., 2000, 5(4): [9],. [J]., 2000, 5(5): [10],. [J]., 2001, 17(2): [11],,. [J]., 2004, 20(1): [12] Wang WZH, Watanabe E, Kobayashi T. A method for measuring soil solution electrical conductivity in the field using TDR[J]. J. Japan Soc. Hydrol. & Water Resour., 2005, 18(1): [13],,,. [J]., 2011, 48(4): [14] Rhoades JD, Manteghi NA, Shouse PJ, Alves WJ. Soil electrical conductivity and soil salinity: New formulations and calibrations[j]. Soil Science Society of America Journal, 1989, 53(2): [15] Rhoades JD, Waggoner BL, Shouse PJ, Alves WJ. Determining soil salinity from soil and soil-paste electrical conductivities: sensitivity analysis of models[j]. Soil Science Society of America Journal, 1989, 53(5): [16] Yasser H, Magnus P, Ronny B. Soil solution electrical conductivity measurements using different dielectric techniques [J]. Soil Science Society of America Journal, 2003, 67(4): [17] Slavich PG, Petterson GH. Estimating the electrical conductivity of saturated paste extracts from 1:5 soil: Water suspensions and texture[j]. Australian Journal of Soil Research, 1993, 31(1): [18], [J]., 2009, 28(1): [19],,. [J]., 2010, 28(1): [20],,,,,. [J]., 2011, 17(2): [21] Khorsandi F, Yazdi FA. Estamation of saturated paste extracts electrical conductivity from 1:5 soil/water suspension and gypsum[j]. Communications in Soil Science and Plant Analysis, 2011, 42(3):

7 Comparative Study on Electrical Conductivity Between Saturated Soil Paste and Saturated Soil Solutions Under Different Soil/Water Ratios GUO Xin-song 1,2, SONG Fu-peng 1*, JU Zheng-shan 2* (1 National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, National Engineering & Technology Research Center for Slow and Controlled Release Fertilizers, College of Resources and Environment, Shandong Agricultural University, Taian, Shandong , China; 2 Key Laboratory of Land Consolidation and Rehabilitation, MLR, Beijing , China) Abstract: To overcome the uncertainty of the saturation point and the measurement instability of the electrical conductivity of saturated soil paste and to represent consistently and accurately the salinity degree of saline soil improved by subsurface drainage, this study systematically compared that the water demand between saturated soil paste and saturated soil solution, the correlation and conversion of electrical conductivity (EC) and soil total salt content (TS) between saturated soil paste and saturated soil solutions under different soil/water ratios (1.. 5, , and ) with chemical analysis and statistical analysis. The results showed that the water demand of saturated soil paste whose saturated point was qualitatively determined originally could be quantitatively determined by calculating soil porosity for the water demand of saturated soil solution of saline-alkali soils (chloride type soil) in the Yellow River delta. EC of saturated soil paste could be replaced completely with EC of saturated soil solution. Neither EC nor TS was the highest value in the series of different soil/water ratios, but there was significant correlation between them. EC correlation were highest between saturated soil paste and saturated soil solution under soil/water ratio as well as TS correlation between saturated soil paste and saturated soil solution under soil/water ratio, which could be respectively converted with the best-fit regression function models: ECe = EC and TSe = (TS ) TS Key words: Soil/water ratio; Soil solution; Saturated soil paste; Electrical conductivity; Soil total salt content

1.0 % 0.25 % 85μm % U416 Sulfate expansion deformation law and mechanism of cement stabilized macadam base of saline areas in Xinjiang Song

1.0 % 0.25 % 85μm % U416 Sulfate expansion deformation law and mechanism of cement stabilized macadam base of saline areas in Xinjiang Song 1.0 % 0.25 % 85μm 0.97 0.136 % U416 Sulfate expansion deformation law and mechanism of cement stabilized macadam base of saline areas in Xinjiang Song Liang 1,2 Wang Xuan-cang 1 1 School of Highway, Chang