紫色土崩解特性对容重和含水率的响应特征
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摘要
以紫色土为研究对象,通过室内重塑土试验,采用多元回归方程和曲面响应等分析方法,研究容重和含水率对紫色土崩解特性的影响。结果表明:(1)在相同容重下,崩解量随着含水率的增加而减小,不同含水率的土样崩解时间有所不同;土样完全崩解时间总体上随着含水率的增加而延长,且崩解量主要集中在崩解阶段前3 min。(2)在相同含水率下,崩解量随着容重的增加而减小,土样完全崩解时间总体上随容重的增大而延长,且崩解量主要集中在前4 min。(3)在相同容重和含水率下,土样崩解速率均随着容重和含水率的增大而减小;较之容重,含水率对崩解速率的影响较大。容重和含水率的交互作用对崩解速率影响显著,即随着容重和含水率的增加,土样崩解速率减小。研究成果为紫色土的侵蚀防治提供了参考。
In the present study, multiple regression equation and surface response analysis were used to investigate the effects of soil bulk densities and water contents on the amount and rates of disintegration in a purple soil. The results showed that:(1) Under the same bulk density, the amount of soil disintegration decreased with the increase of water contents, and the soil disintegration time varied with water contents. The total time of soil disintegration was extended with the increase of water contents, and the amount of soil disintegration was mainly concentrated in the first three minutes of the soil disintegration stage.(2) Under the same water content, the amount of soil disintegration decreased but the soil disintegration time increased with the increase of soil bulk densities, and the amount of disintegration was mainly concentrated in the first four minutes.(3) Under the same bulk density and water content, the soil disintegration rates decreased with the increase of soil bulk densities and water contents. Compared with bulk density, water content had a greater influence on the soil disintegration rates. The interaction of bulk density and water content had a significant effect on the soil disintegration rates, indicating that the soil disintegration rates decreased with the increase of bulk density and water content. Our findings provided some reference for controlling erosion of the purple soil.
In the present study, multiple regression equation and surface response analysis were used to investigate the effects of soil bulk densities and water contents on the amount and rates of disintegration in a purple soil. The results showed that:(1) Under the same bulk density, the amount of soil disintegration decreased with the increase of water contents, and the soil disintegration time varied with water contents. The total time of soil disintegration was extended with the increase of water contents, and the amount of soil disintegration was mainly concentrated in the first three minutes of the soil disintegration stage.(2) Under the same water content, the amount of soil disintegration decreased but the soil disintegration time increased with the increase of soil bulk densities, and the amount of disintegration was mainly concentrated in the first four minutes.(3) Under the same bulk density and water content, the soil disintegration rates decreased with the increase of soil bulk densities and water contents. Compared with bulk density, water content had a greater influence on the soil disintegration rates. The interaction of bulk density and water content had a significant effect on the soil disintegration rates, indicating that the soil disintegration rates decreased with the increase of bulk density and water content. Our findings provided some reference for controlling erosion of the purple soil.
引文
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[21] 郭晓朦,何丙辉,秦伟,等.不同坡长条件扰动地表下土壤入渗与贮水特征[J].水土保持学报,2015,29(2):198-203.
[22] 马笑,朱首军.黄土丘陵沟壑区梯田地埂土壤崩解特性试验研究[J].西北林学院学报,2013,28(4):21-25.
[23] 桂劲松,康海贵.结构可靠度分析的响应面法及其Matlab实现[J].计算力学学报,2004,21(6):683-687.
[24] 张晓媛,范昊明,杨晓珍,等.容重与含水率对砂质黏壤土静水崩解速率影响研究[J].土壤学报,2013,50(1):214-218.
[25] 邱陆旸,张丽萍,陆芳春,等.基于熵权法的林下土壤抗蚀性评价及影响因素分析[J].水土保持学报,2016,30(4):74-79.
[26] 吴淑安,蔡强国,靳长兴.内蒙古东胜地区土壤抗蚀性实验研究[J].干旱区资源与环境,1996,10(2):38-45.
[27] 魏朝富,高明.有机肥对紫色水稻土水稻性团聚体的影响[J].土壤通报,1995,26(3):114-116.
[2] Ruizvera V M, Wu L. Influence of sodicity, clay mineralogy, prewetting rate, and theiri nteraction on aggregate stability[J].Soil Science Society of America Journal,2006,70(6):1825-1833.
[3] 郭永春,谢强,文江泉.水热交替对红层泥岩崩解的影响[J].水文地质工程地质,2012,39(5):69-73.
[4] 王健,马璠,张鹏辉,等.干湿交替对黄土崩解速度的影响[J].土壤学报,2015,52(6):1273-1279.
[5] 颜波,汤连生,胡辉,等.花岗岩风化土崩岗破坏机理分析[J].水文地质工程地质,2009,36(6):68-71.
[6] 李家春,田伟平.工程压实黄土崩解试验研究[J].重庆交通大学学报(自然科学版),2005,24(5):74.
[7] 李喜安,黄润秋,彭建兵.黄土崩解性试验研究[J].岩石力学与工程学报,2009,28(1):3207-3213.
[8] 唐军,余沛,魏厚振,等.贵州玄武岩残积土崩解特性试验研究[J].工程地质学报,2011,19(5):778-783.
[9] Lado M, Benhur M, Shainberg I. Soil Wetting and texture effects on aggregate stability, seal formation, and erosion[J].Soil Science Society of America Journal,2004,68(6):1992-1999.
[10] 张泽,马巍, Pendin V V,等.不同含水量亚黏土的崩解特性实验研究[J].水文地质工程地质,2014,41(4):104-107.
[11] 高建伟,余宏明,钱玉智,等.重塑黄土崩解特性试验研究[J].长江科学院院报,2014,31(10):146-150.
[12] Graber E R, Fine P, Levy G J. Soil stabilization in semiarid and arid land agriculture[J].Journal of Materials in Civil Engineering,2006,18(2):190-205.
[13] Ferrero A, Lipiec J, Nosalewicz A, et al. Stability and sorptivity of soil aggregates in grassed and cultivated sloping vineyards[J].Polish Journal of Soil Science,2007,40(1):1-8.
[14] 徐少君,曾波,类淑桐,等.三峡库区几种耐水淹植物根系特征与土壤抗水蚀增强效应[J].土壤学报,2011,48(1):160-167.
[15] 严冬春,文安邦,史忠林,等.三峡库区紫色土坡耕地细沟发生的临界坡长[J].长江科学院院报,2010,27(11):58-61.
[16] 郑江坤,李静苑,秦伟,等.川北紫色土小流域植被建设的水土保持效应[J].农业工程学报,2017,33(2):141-147.
[17] 罗键,尹忠,郑子成,等.不同降雨条件下紫色土横垄坡面地表微地形变化特征[J].中国农业科学,2016,49(16):3162-3173.
[18] 张祖垚.紫色土抗侵蚀性指标研究[D].武汉:长江科学院,2009.
[19] Suuster E, Ritz C, Roostalu H, et al. Soil bulk density pedotransfer functions of the humus horizon in arable soils[J].Geoderma,2011,163(1/2):74-82.
[20] 胡建朋,杨吉华,罗明达,等.山东石灰岩山地不同林分类型土壤入渗特征研究[J].水土保持学报,2011,25(3):54-58.
[21] 郭晓朦,何丙辉,秦伟,等.不同坡长条件扰动地表下土壤入渗与贮水特征[J].水土保持学报,2015,29(2):198-203.
[22] 马笑,朱首军.黄土丘陵沟壑区梯田地埂土壤崩解特性试验研究[J].西北林学院学报,2013,28(4):21-25.
[23] 桂劲松,康海贵.结构可靠度分析的响应面法及其Matlab实现[J].计算力学学报,2004,21(6):683-687.
[24] 张晓媛,范昊明,杨晓珍,等.容重与含水率对砂质黏壤土静水崩解速率影响研究[J].土壤学报,2013,50(1):214-218.
[25] 邱陆旸,张丽萍,陆芳春,等.基于熵权法的林下土壤抗蚀性评价及影响因素分析[J].水土保持学报,2016,30(4):74-79.
[26] 吴淑安,蔡强国,靳长兴.内蒙古东胜地区土壤抗蚀性实验研究[J].干旱区资源与环境,1996,10(2):38-45.
[27] 魏朝富,高明.有机肥对紫色水稻土水稻性团聚体的影响[J].土壤通报,1995,26(3):114-116.
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