折力损伤自修复对干旱矿区小叶锦鸡儿根系固土的影响

doi:10.13866/j.azr.2018.06.24

摘要/Abstract

摘要： 为明确干旱矿区侵蚀发生后折力损伤对植物根系力学特性的影响及其受损后的自修复机制,利用HG100数显式推拉力计和自制便携式试验机台,对小叶锦鸡儿1~4 mm径级直根和侧根分支处未受损及受损自修复后的抗折力学特性进行研究。结果表明:① 生长季初期,未受损小叶锦鸡儿根系极限抗折力与根径呈幂函数正相关,抗折强度与根径幂函数负相关,直根极限抗折力和抗折强度均大于侧根分支处;② 折力损伤会明显抑制根系正常生长,小叶锦鸡儿根系受损自修复后,活性、生长量和保存率均低于平行对照,根径和根型均是影响这种抑制作用的重要因素,侧根分支处活性和保存率在受损后的减少程度显著大于直根;③ 小叶锦鸡儿根系受损自修复后,极限抗折力与抗折强度相比,生长季初期有所增加,但外力损伤会显著阻碍这种增长,导致其增长率显著低于平行对照,3个月后极限抗折力修复率为48.91%,抗折强度修复率为57.59%,说明根系受损后不会彻底丧失固土能力,通过自修复可以逐步恢复原有功能,但短期内自修复程度有限。直根极限抗折力修复率为60.55%,侧根分支处仅为36.34%,说明在同等外力荷载条件下,小叶锦鸡儿直根受损自修复能力显著大于侧根分支处,具备更强的再次抵御外力破坏的能力。

关键词: 采煤沉陷区, 抗折特性, 小叶锦鸡儿(Caragana microphylla), 根系受损, 自修复

Abstract: In this study, the HG100 digital push & pull tester and self-developed experimental installation were used to investigate the anti-fracture mechanical properties of tap roots (diameter was 1-4 mm) and lateral roots of Caragana microphylla before and after occurring the fracture force injury. The purposes of the study were to clarify the effects of fracture force injury on mechanical properties and self-healing mechanism of plant roots after soil erosion occurred in the Shendong diggings. The results indicated that: ① There was a positive power function correlation between the root ultimate anti-fracture force and root diameter of C.microphylla in early growth season, but a negative one between the anti-fracture strength and root diameter. Moreover, the ultimate anti-fracture force and strength of tap roots were higher than that of lateral roots. ② The fracture force injury restricted significantly the normal growth of roots, and the activity, growth and survival rate of C.microphylla roots after self-healing were all lower than those of contrast. Root diameter and root type were the important factors affecting evidently such restriction, the activity and survival rate of lateral roots were decreased more significantly than those of tap roots after injured; ③ The ultimate anti-fracture force and strength of C.microphylla roots were increased to some extent after self-healing compared with those in early growth season, but such increase was restricted by the external injury, and the growth rate was significantly lower than that of control. The self-healing rates of ultimate anti-fracture force and strength after three months were 48.91% and 57.59% respectively. In conclusion, the root system could not completely lose its soil reinforcement capability after injured, the original function could be restored gradually through self-healing capability. The self-healing rates of tap roots and lateral roots were 60.55% and 36.34% respectively, which showed that the self-healing capability of tap roots was obviously higher than that of lateral roots.

Key words: coal mining subsidence land, anti-fracture feature, Caragana microphylla, root injured, self-healing

王博, 刘静, 王晨嘉, 张欣, 李强, 刘嘉伟, 张强. 折力损伤自修复对干旱矿区小叶锦鸡儿根系固土的影响[J]. 干旱区研究, 2018, 35(6): 1459-1467.

WANG Bo, LIU Jing, WANG Chen-jia, ZHANG Xin, LI Qiang, LIU Jia-wei, ZHANG Qiang. Effects of Self-healing of Caragana microphylla on Root Soil Reinforcement in Arid Diggings[J]. Arid Zone Research, 2018, 35(6): 1459-1467.

参考文献

〔1〕封建民, 董桂芳,郭玲霞,等.榆神府矿区景观格局演变及其生态响应〔J〕.干旱区研究,2014,31(6):1 141-1 146.〔Feng Jianmin,Dong Guifang,Guo Lingxia,et al.Ecological responses to changing landscape patterns in Yushenfu mining area〔J〕.Arid Zone Research,2014,31(6):1 141-1 146.〕
〔2〕胡振琪,王新静,贺安民.风积沙区采煤沉陷地裂缝分布特征与发生发育规律〔J〕.煤炭学报,2014,39(1):11-18.〔Hu Zhenqi,Wang Xinjing,He Anming.Distribution characteristic and development rules of ground fissures due to coal mining in windy and sandy region〔J〕.Journal of China Coal Society,2014,39(1):11-18.〕
〔3〕王双明,杜华栋,王生全.神木北部采煤塌陷区土壤与植被损害过程及机理分析〔J〕.煤炭学报,2017,42(1):17-26.〔Wang Shuangming,Du Huadong,Wang Shengquan.Analysis of damage process and mechanism for plant community and soil properties at northern Shenmu subsidence mining area〔J〕.Journal of China Coal Society,2017,42(1):17-26.〕
〔4〕胡婵娟,刘国华,郭雷,等.土壤侵蚀对土壤理化性质及土壤微生物的影响〔J〕.干旱区研究,2014,31(4):702-708.〔Hu Chanjuan,Liu Guohua,Guo Lei,et al.Effects of soil erosion on soil physicochemical properties and soil microorganisms〔J〕.Arid Zone Research,2014,31(4):702-708.〕
〔5〕郭京衡,李尝君,曾凡江,等.2种荒漠植物根系生物量分布与土壤水分、养分的关系〔J〕.干旱区研究,2016,33(1):166-171.〔Guo Jingheng,Li Changjun,Zeng Fanjiang,et al.Relationship between root biomass distribution and soil moisture,nutrient for two desert plant species〔J〕.Arid Zone Research,2016,33(1):166-171.〕
〔6〕郭月峰,王娟,祁伟,等.风沙土区黄柳根系及其碳储量分布特征〔J〕.干旱区研究,2017,34(2):344-349.〔Guo Yuefeng,Wang Juan,Qi Wei,et al.Distribution of roots and root carbon stocks of Salix gordejevii in Aohan Banner,Inner Mongolia〔J〕.Arid Zone Research,2017,34(2):344-349.〕
〔7〕潘东江,张农,赵一鸣,等.西部矿区植被根系采动损伤特征及细观力学机制〔J〕.煤炭学报,2017,42(2):373-380.〔Pan Dongjiang,Zhang Nong,Zhao Yiming,et al.Characteristics and mesoscopic mechanics of vegetation roots damage induced by mining in western mining area〔J〕.Journal of China Coal Society,2017,42(2):373-380.〕
〔8〕蒙仲举,任晓萌,陈晓燕,等.采煤塌陷对沙柳根系损伤机理研究〔J〕.北方园艺,2014(1):66-68.〔Meng Zhongju,Ren Xiaomeng,Chen Xiaoyan,et al.Study on damage mechanism of roots of Salix psammophila by mining subsidence〔J〕.Northern Horticulture,2014(1):66-68.〕
〔9〕王东生.论水土流失综合治理中植被自然修复的可行性〔J〕.中国水土保持,2013(3):51-54.〔Wang Dongsheng.Feasibility of natural rehabilitation of vegetation in integrated treatment of soil and water loss〔J〕.Soil and Water Conservation in China,2013(3):51-54.〕
〔10〕张涛,陈智平,车克钧,等.干旱区矿区不同立地类型土壤种子库特征〔J〕.干旱区研究,2017,34(1):51-58.〔Zhang Tao,Chen Zhiping,Che Kejun,et al.Characteristics of soil seed banks of different site types in arid mining area〔J〕.Arid Zone Research,2017,34(1):51-58.〕
〔11〕胡振琪,龙精华,王新静.论煤矿区生态环境的自修复、自然修复和人工修复〔J〕.煤炭学报,2014,39(8):1 751-1 757.〔Hu Zhenqi,Long Jinghua,Wang Xinjing.Self-healing natural restoration and artificial restoration of ecological environment for coalmining〔J〕.Journal of China Coal Society,2014,39(8):1 751-1 757.〕
〔12〕毕银丽,王瑾,冯颜博,等.菌根对干旱区采煤沉陷地紫穗槐根系修复的影响〔J〕.煤炭学报,2014,39(8):1 758-1 764.〔Bi Yinli,Wang Jin,Feng Yanbo,et al.Effect of arbuscular mycorrhiza on root self-repairing action of Amorpha fruticosa L.in coal mining subsidence land in arid areas〔J〕.Journal of China Coal Society,2014,39(8):1 758-1 764.〕
〔13〕杜涛,毕银丽,邹慧,等.地表裂缝对沙柳根际微生物和酶活性的影响〔J〕.煤炭学报,2013,38(12):2 221-2 226.〔Du Tao,Bi Yinli,Zou Hui,et al.Effects of surface cracks caused by coal mining on microorganisms and enzyme activities in rhizosphere of Salix psammophila〔J〕.Journal of China Coal Society,2013,38(12):2 221-2 226.〕
〔14〕Yuan S,Zhang X,Liu J,et al.Study of the influence factors on roots tensile strength of Caragana microphylla Lam.and Sabina vulgaris Ant.〔C〕.International Conference on Combating Land Degradation in Agricultral Areas,2010:526-529.
〔15〕Liu F Q,Liu J,Liu P F,et al.Benefit evaluation of soil-reinforcement by roots between five plants by analytic hierarchy process〔J〕.Advanced Materials Research,2014,955:3 514-3 517.
〔16〕赵玉娇,胡夏嵩,李华坦,等.寒旱环境灌木根系增强边坡土体抗剪强度特征〔J〕.农业工程学报,2016,32(11):174-180.〔Zhao Yujiao,Hu Xiasong,Li Huatan,et al.Characteristics of slope soil shear strength reinforced by shrub roots in cold and arid environments〔J〕.Transactions of the Chinese Society of Agricultural Engineering,2016,32(11):174-180.〕
〔17〕Li Y F,Liu J,Zhang X,et al.Study on the vulnerable root location of two kinds of plants by anti-fracture force〔C〕.New Energy and Sustainable Development:Proceedings of 2016 International Conference on New Energy and Sustainable Development (NESD 2016),2017:271-277.
〔18〕Zhang C B,Chen L H,Jiang J.Why fine tree roots are stronger than thicker roots:The role of cellulose and lignin in relation to slope stability〔J〕.Geomorphology,2014,206:196-202.
〔19〕Bordoni M,Meisina C,Vercesi A,et al.Quantifying the contribution of grapevine roots to soil mechanical reinforcement in an area susceptible to shallow landslides〔J〕.Soil & Tillage Research,2016,163:195-206.
〔20〕Maeeo T.Root tensile strength relationships and their slope stability implications of three shrub secies in the Northoern Apennines (Italy)〔J〕.Geomorphology,2007,87(4):268-283.
〔21〕王云翔,孙海龙,罗龙皂,等.人工石质边坡构树根系抗剪特性研究〔J〕.水土保持研究,2012,19(3):114-118.〔Wang Yunxiang,Sun Hailong,Luo Longzao,et al.Study on characteristic of root shear of Broussonetia papyrifera L.on rocky-steep slope〔J〕.Research of Soil and Water Conservation,2012,19(3):114-118.〕
〔22〕Yao X J,Wang L H,Liu J,et al.Biomechanics and utility of shallow soil fixation by Sabina valgaris Ant.roots in arid and semiarid soils〔J〕.Sensors & Transducers Journal,2014,167(3):129-134.
〔23〕Giadrossich F,Schwarz M,Cohen D,et al.Mechanical interactions between neighbouring roots during pullout tests〔J〕.Plant and Soil,2013,367(1-2):391-406.
〔24〕Liu X M,Liu J,Sun X,et al.Study on the lateral root branch tensile mechanical characteristics of three kinds of plants at exuberant growth period〔J〕.Agriculture and Animal Science,2012,47:47-51.
〔25〕王姣龙,李际平,谌小勇,等.芘胁迫下紫玉兰根系活性及根系分泌物的响应〔J〕.中南林业科技大学学报,2017,37(2):50-56.〔Wang Jiaolong,Li Jiping,Chen Xiaoyong,et al.Response of polycyclic aromatic hydrocarbon pyrene on root exudate components and root activity of Magnolia liliiflor Desr.〔J〕.Journal of Central South University of Forestry & Technology,2017,37(2):50-56.〕
〔26〕Saifuddin M,Osman N,Motior R M,et al.Soil reinforcement capability of two legume species from plant morphological traits and mechanical properties〔J〕.Current Science,2015,108(7):1 340-1 347.
〔27〕于瑞雪,李少朋,毕银丽,等.煤炭开采对沙蒿根系生长的影响及其自修复能力〔J〕.煤炭科学技术,2014,42(2):110-113.〔Yu Ruixue,Li Shaopeng,Bi Yinli,et al.Effect of coal mining on root growth of Artemisia sphaerocephala and its self-repairing ability〔J〕.Coal Science and Technology,2014,42(2):110-113.〕
〔28〕朱海丽,胡夏嵩,毛小青,等.护坡植物根系力学特性与其解剖结构关系〔J〕.农业工程学报,2009,25(5):40-46.〔Zhu Haili,Hu Xiasong,Mao Xiaoqing,et al.Relationship between mechanical characteristics and anatomical structures of slope protection plant root〔J〕.Transactions of the Chinese Society of Agricultural Engineering,2009,25(5):40-46.〕
〔29〕陆秀明,黄庆,刘怀珍,等.华南超级稻根系特点和根系活力研究〔J〕.中国农学通报,2012,28(6):30-34.〔Lu Xiuming,Huang Qing,Liu Huaizhen,et al.Research of root characteristics and root activity in south super-yield rice〔J〕.Chinese Agricultural Science Bulletin,2012,28(6):30-34.〕
〔30〕Makarova O V,Cofie P,Koolen A J.Axial stress-strain relationships of fine roots of Beech and Larch in loading to failure and in cyclic loading〔J〕.Soil & Tillage Research,1998,45(1-2):175-187.
〔31〕Cofir P,Koolen A J.Test speed and other factors affecting the measurement of tree root properties used in soil reinforcement models〔J〕.Soil & Tillage Research,2001,63(1-2):51-56.
〔32〕阳小成.环境应力对中华猕猴桃组织培养过程生物学效应的初步研究〔D〕.重庆:重庆大学,2002.〔Yang Xiaocheng.Primary Study on Biological Effects of Actinidia chinensis Callus & Seedling on Environmental Stresses〔D〕.Chongqing:Chongqing University,2002.〕
〔33〕孙贝贝,刘杰,葛亚超,等.植物再生的研究进展〔J〕.科学通报,2016,61(36):3 887-3 902.〔Sun Beibei,Liu Jie,Ge Yachao,et al.Recent progress on plant regeneration〔J〕.Chinese Science Bulletin,2016,61(36):3 887-3 902.〕

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