Soil water characteristics under different vegetation recovery modes in hilly and gully region of the Loess Plateau:A case study of the Qiaozigou Watershed
MA Jianye, LI Zhanbin, MA Bo, WANG He, ZHANG Letao, LI Chaodong
1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A & F University, 712100, Yangling, Shaanxi, China; 2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS & MWR, 712100, Yangling, Shaanxi, China
Abstract:[Background] The hilly and gully region of the Loess Plateau, which is suffering from lacking in water resources, is the most serious soil erosion region in Loess Plateau. Generally, the soil moisture is an effective indicator to evaluate the influence of soil and water conservation measures. The objectives of this paper were to study the redistribution process of precipitation and the effect on the stability of soil reservoir under different modes of vegetation recovery. [Methods] Based on paired watersheds, the effect of precipitation and slope aspect on soil moisture were quantitatively analyzed under different modes of vegetation restoration. Paired watersheds included two typical small watersheds in the hilly and gully regions of Loess Plateau:Qiaozi West Watershed (waste-grassland of natural restoration) and the Qiaozi East Watershed (black locust forestland of artificial restoration). Samples were collected at 9 soil layers in the upstream, midstream and downstream of two paired watersheds. The 9 soil depths were 0-2, 2-4, 5-15, 15-25, 25-35, 35-45, 45-65, 65-85, and 85-100 cm, respectively. This project was carried out about 4 times throughout the period from May to August. Characteristics of soil mass water content and isotope concentration of hydrogen and oxygen (δO18) within 0-100 cm soil layer were calculated. [Results] The results showed that there were significant differences in the redistribution of soil water under different vegetation restoration modes (P<0.05). Soil water content of watershed mainly comprising of black locust forestland (16.72%) is lower than that of the watershed mainly comprising of waste-grassland (20.42%). The variation coefficient of soil water content was relatively higher and the response of soil water content to precipitation was weaker in the former watershed. Critical depth for soil moisture was identified for the two watersheds. The water content was relatively stable (about 12.19%) under the soil depth about 10 cm in the black locust forestland. However, the water content increased with the soil depth when the soil depth blew 30 cm in the waste-grassland. The maximum evaporation depth of waste-grassland was 30 cm, which was shallower than that in the black locust forestland (about 55 cm). The soil mass water content in different slope aspects in Qiaozi West Watershed ranked in the follows:shady slope (19.60%), half negative slope (17.65%), half-sunny slope (14.24%), and the content were lower respectively about 6.68%, 4.98%, 1.03% in each slope aspect of Qiaozi East Watershed than the former watershed. Additionally, the concentration of 18O in different slope aspects ranked in the follows:negative slope(-5.57‰), half-sunny slope (-5.64‰) and shady slope(-6.08‰) in Qiaozi West Watershed, while the concentration were -5.74‰, -6.21‰, -6.03‰ in Qiaozi East Watershed, respectively. [Conclusions] There were differences for soil moisture in the same slope aspect under different vegetation restoration modes in the hilly and gully region of the Loess Plateau. In natural restoration watershed, the influence of slope aspect on soil water content is greater than that of artificial restoration watershed. Compared with the artificial restoration mode, the natural restoration can greatly increase the capacity of soil water storage, which is beneficial to improve and sustain the watershed ecology.
马建业1, 李占斌2, 马波1, 王贺1, 张乐涛2, 李朝栋1. 黄土高原丘陵区不同植被恢复方式下土壤水分特征——以桥子沟流域为例[J]. 中国水土保持科学, 2017, 15(4): 8-15.
MA Jianye, LI Zhanbin, MA Bo, WANG He, ZHANG Letao, LI Chaodong. Soil water characteristics under different vegetation recovery modes in hilly and gully region of the Loess Plateau:A case study of the Qiaozigou Watershed. SSWC, 2017, 15(4): 8-15.
姜汉侨, 段昌群, 杨树华, 等. 植物生态学[M]. 北京:高等教育出版社, 2004:115. JIANG Hanqiao, DUAN Changqun, YANG Shuhua, et al. Phytoecology[M]. Beijing:Higher Education Press, 2004:115.
[2]
SIMMONS M T,ARCHER S R,TEAGUE W R, et al.Tree (Prosopis glandulosa) effects on grass growth:an experimental assessment of above-and below ground interactions in a temperate savanna[J]. Journal of Arid Environments, 2008, 72(4):314.
[3]
李玲芬, 延军平, 刘冬梅, 等. 干旱-半干旱地区不同植被条件下土壤含水量变化及植被建设途径分析. 水土保持通报, 2009, 1:22. LI Lingfen, YAN Junping, LIU Dongmei, et al. Variation of soil moisture in arid and semi-arid areas under different vegetation and the ways of ecological construction[J]. Bulletin of Soil and Water Conservation, 2009, 1:22.
[4]
黄志刚, 欧阳志云, 李锋瑞, 等. 南方丘陵区不同坡地利用方式土壤水分动态[J]. 生态学报, 2009, 29(6):3136. HUANG Zhigang, OUYANG Zhiyun, LI Fengrui, et al. Spatial and temporal dynamics in soil water storage under different use types of sloping fields:a case study in a high land region of southern China[J]. Acta Ecologica Sinica, 2009, 29(6):3136.
[5]
陈洪松, 邵明安, 王克林. 黄土区深层土壤干燥化与土壤水分循环特征[J]. 生态学报, 2005, 25(10):2491. CHEN Hongsong, SHAO Ming'an, WANG Kelin. Desiccation of deep soil layer and soil water cycle characteristics on the Loess Plateau[J]. Acta Ecologica Sinica, 2005, 25(10):2491.
[6]
FAMIGLIETTI J S, RUDNICK J W, RODLL M. Variability in surface moisture content along a hill slope transect:Rattlesnake Hill, Texas[J]. Journal of Hydrology, 1998, 2(10):259.
[7]
张小娟, 宋维峰, 王卓娟. 应用氢氧同位素技术研究土壤水的原理与方法[J]. 亚热带水土保持, 2015, 1:32 ZHANG Xiaojuan, SONG Weifeng, WANG Zhuojuan. The principle and method of soil water isotope technology research and application[J]. Subtropical Soil and Water Conservation, 2015, 1:32.
[8]
LEE K S, KIM J M, LEE D R, et al. Analysis of water movement through an unsaturated soil zone in Jeju Island, Korea using stable oxygen and hydrogen isotopes[J]. Journal of Hydrology, 2007, 345(3/4):199.
[9]
王贺, 李占斌, 马波, 等. 黄土高原丘陵沟壑区流域不同水体氢氧同位素特征:以纸坊沟流域为例[J]. 水土保持学报, 2016(4):85. WANG He, LI Zhanbin, MA Bo, et al. Characteristics of hydrogen and oxygen isotopes in different waters of the loess hilly and gully region:a case study of the Zhifanggou watershed[J]. Journal of Soil Water Conservation, 2016(4):85.
[10]
谢媛媛,余新晓,张满良. 基于GIS的桥子沟流域土壤侵蚀初步分析[J]. 水土保持研究, 2005(5):267. XIE Yuanyuan, YU Xinxiao, ZHANG Manliang, Primary analysis of soil erosion intensity in Qiaozigou watershed based on GIS[J]. Research of Soil and Water Conservation, 2005(5):267.
[11]
王贺, 李占斌, 马波, 等. 黄土高原丘陵沟壑区不同水体间转化特征:以韭园沟流域为例[J]. 中国水土保持科学, 2016(3):19. WANG He, LI Zhanbin, MA Bo,et al. Characteristics of waters transformation in the hilly and gully region of the Loess Plateau:a case study of the Jiuyuangou watershed[J]. Research of Soil and Water Conservation, 2016(3):19.
[12]
CRAIG H. Isotopic variation switch meteoric water[J]. Science, 1961, 133:1702.
[13]
姚西文. 纸坊沟流域淤地坝坝地水分环境与可持续发展[J]. 甘肃水利水电技术, 2004,4:384. YAO Xiwen. Check dam land water environment and sustainable development of the Zhifanggou watershed[J]. Gansu Water Conservancy and Hydropower Technology, 2004, 4:384.
[14]
马非, 张亚红, 谢应忠. 半干旱黄土高原丘陵区不同植被条件下土壤水分研究进展[J]. 农业科学研究, 2007, 1:76. MA Fei, ZHANG Yanghong, XIE Yingzhong. Progress of the soil moisture under different vegetation conditions in semi-arid hill area of the Loess Plateau[J]. Journal of Agricultural Sciences, 2007, 1:76.
[15]
曹扬, 赵忠, 渠美, 等. 刺槐根系对深层土壤水分的影响[J]. 应用生态学报, 2006, 5:765. CAO Yang, ZHAO Zhong, QU Mei, et al. Effects of Robinia pseudoacacia roots on deep soil moisture status[J]. Chinese Journal of Applied Ecology, 2006, 5:765.
[16]
张铁钢, 李占斌, 李鹏, 等. 土石山区不同植物土壤水分利用方式对降雨的响应特征[J]. 应用生态学报, 2016(5):1461. ZHANG Tiegang, LI Zhanbin, LI Peng, et al. Response characteristics of soil water use patterns by different plants to precipitation in rocky mountainous area[J]. Chinese Journal of Applied Ecology, 2016(5):1461.
[17]
李海防, 卫伟, 陈利顶, 等. 黄土高原林草地覆盖土壤水量平衡研究进展[J]. 水土保持研究, 2013(1):287. LI Haifang, WEI Wei, CHEN Liding, et al. Progress in the study of soil water balance under forest and grassland covers on the Loess Plateau[J]. Research of Soil and Water Conservation, 2013(1):287.
[18]
杨永东, 张建生, 蔡国军, 等. 黄土高原丘陵沟壑区不同植被类型土壤水分动态变化[J]. 水土保持研究, 2008(4):149. YANG Yongdong, ZHANG Jianjun, CAI Guojun, et al. Soil water dynamics of different vegetation in gully and hilly regions of the Loess Plateau[J]. Research of Soil and Water Conservation, 2008(4):149.
[19]
尹秋龙, 焦菊英, 寇萌. 极端强降雨条件下黄土丘陵沟壑区不同植被类型土壤水分特征[J]. 自然资源学报, 2015(3):459. YIN Qiulong, JIAO Junying, KOU Meng. The soil moisture characteristics under different vegetation types after extremely heavy rainfall on the hilly-gullied Loess Plateau[J]. Journal of Natural Resources, 2015(3):459.