小麦根系对紫色土区坡地不同坡位土壤微团聚体特征的影响

doi:10.16843/j.sswc.2020.02.009

Abstract
Figure/Table
References
Related Citation (12)

Download: PDF (883 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract [Background] The interaction between tillage erosion and water erosion causes soil and water losses in hilly croplands, which is a severe problem in hilly area with purple soil. In order to provide a scientific basis for the effects of wheat roots on water and soil conservation, the impacts of wheat roots on the composition and stability of soil micro-aggregates at different slope positions in purple soil were analyzed.[Methods] Two linear slopes were selected as the study site, which have an average gradient of 23%, and a horizontal length of 20 m. The whole slope was divided into 5 sample points:1 m, 5 m, 10 m, 15 m, and 20 m from the hill top to bottom. One slope where the typical wheat was cultivated was used as the treatment plot, while the other without wheat was used as the control plot. Five fractions (0.05-0.25 mm, 0.01-0.05 mm, 0.005-0.01 mm, 0.001-0.005 mm, and <0.001 mm) of soil micro-aggregates were obtained by field survey and laboratory analysis, and the micro-aggregates stability indicators included the mean weight diameter of aggregates (MWD), the mean weight soil surface area (MWSSA), and the fractal dimension (D).[Results] 1) The proportion of coarse fractions (0.01-0.25 mm) and <0.001 mm fractions in the treatment plot were higher than those in the control plot, especially at the 0 m slope position, while the 0.005-0.001 mm fraction was lower than that in the control plot. 2) In the range of 0-10 cm soil depth the significant differences (P<0.1) in MWD values were found at the 0 m, 5 m, and 20 m slope positions, with increments of 59.03%, 42.46%, 29.99%, respectively, and the MWSSA decreased compared with the control plot at the 5 m and 20 m slope positions. However, no significant changes were found at the other slope positions. The D was higher than that of the control plot except at the 5 m slope position. 3) The significant (P<0.1) increase of MWD by 38.23% was found at the 15 m slope position, while the MWSSA was lower than that of the control plot at 10 m, 15 m, and 20 m slope positions in 0-10 cm soil depth. 4) Correlation analysis indicated significant relationships between D and the proportion of <0.001 mm fraction (P<0.01).[Conculsions] Wheat roots in purple hillslope can intercept micro-aggregates of <0.001 mm and promote the polymerization from fine fractions (<0.01 mm) to coarse fractions (0.01-0.25 mm), and improve soil micro-aggregate composition. The root system of winter wheat presents the most significant effect on the stability of soil micro-aggregates at the boundary of the slope field (upslope and downslope positions).

Key words： wheat root micro-aggregates composition feature slope positions

Received: 31 January 2019

PACS:

S152.4

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LIU Jing
	WANG Yong
	HOU Ning
	ZHANG Hanyu
	ZHA Lin
	LU Xiuyuan
	LI Fucheng

Cite this article:

LIU Jing,WANG Yong,HOU Ning, et al. Effects of wheat root on the characteristic of soil micro-aggregates at different slope positions of purple hill slope[J]. SSWC, 2020, 18(2): 69-76.

URL:

http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2020.02.009 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2020/V18/I2/69

[1]	SIX J, BOSSUTY H, DEGRYZE S, et al. A history of research on the link between (micro)aggregates, soil biota, and soil organic matter dynamics[J]. Soil and Tillage Research, 2004, 79(1):7.
[2]	CENTENARO G, HUDEK C, ZANELLA A, et al.Root-soil physical and biotic interactions with a focus on tree root systems:A review[J]. Applied Soil Ecology, 2018, 123:318.
[3]	李仲明. 中国紫色土:上册[M]. 北京:科学出版社, 1991:40. LI Zhongming. Purple soils in China (1)[M]. Beijing:Science Press, 1991:40.
[4]	ZHANG Jianhui, NI Shijun, SU Zhengan. Dual roles of tillage erosion in lateral SOC movement in the landscape[J]. European Journal of Soil Science, 2012, 63(2):165.
[5]	MUELLER C W, SCHLUND S, PRIETZEL J, et al. Soil aggregate destruction by ultrasonication increases soil organic matter mineralization and mobility[J]. Soil Science Society of America Journal, 2012, 76(5):1634.
[6]	DU Zhangliu, REN Tusheng, HU Chunsheng, et al. Transition from intensive tillage to no-till enhances carbon sequestration in microaggregates of surface soil in the North China Plain[J]. Soil and Tillage Research, 2015, 146(1):26.
[7]	KRAUSE L, RODIONOV A, SCHWEIZER S A, et al. Microaggregate stability and storage of organic carbon is affected by clay content in arable Luvisols[J]. Soil and Tillage Research, 2018, 182:123.
[8]	VEZZANI F M, ANDERSON C, MEENKEN E, et al. The importance of plants to development and maintenance of soil structure, microbial communities and ecosystem functions[J]. Soil and Tillage Research, 2018, 175:139.
[9]	代文才, 高明, 王子芳, 等. 紫色丘陵区不同土地利用方式土壤剖面微团聚体组成及分形特征[J]. 水土保持学报, 2016, 30(6):259. DAI Wencai,GAO Ming, WANG Zifang, et al. Composition and fractal features of soil micro-aggregates under different land-use types in purple hilly area[J]. Journal of Soil and Water Conservation, 2016, 30(6):259.
[10]	国家林业局. 林业行业标准[S]. 北京:中国标准出版社, 1999:68. State Forestry Administration of China. Forestry Industry Standards[S]. Beijing:China Standards Press, 1999:68.
[11]	杨培岭, 罗远培, 石元春. 用粒级的重量分布表征的土壤分形特征[J]. 科学通报, 1993(20):1896. Yang Peiling, Luo Yuanpei, Shi Yuanchun. Soil fractal characteristics characterized by weight distribution of particle size[J]. Chinese Science Bulletin, 1993, 38(20):1896.
[13]	WANG Shengqiang, LI Tingxuan, ZHENG Zicheng. Effect of tea plantation age on the distribution of soil organic carbon and nutrient within micro-aggregates in the hilly region of western Sichuan, China[J]. Ecological Engineering, 2016(90):113.
[12]	张超, 刘国彬, 薛萐, 等. 黄土丘陵区不同植被类型根际土壤微团聚体及颗粒分形特征[J]. 中国农业科学, 2011, 44(3):507. ZHANG Chao, LIU Guobin, XUE Sha,et al. Fractal features of rhizosphere soil microaggregate and particle-size distribution under different vegetation types in the Hilly-Gully Region of Loess Plateau[J]. Scientia Agricultura Sinica, 2011, 44(3):507.
[14]	MURUGAN R, DJUKIC I, KEIBLINGER K, et al. Spatial distribution of microbial biomass and residues across soil aggregate fractions at different elevations in the Central Austrian Alps[J]. Geoderma, 2019, 339:1.
[15]	ZHANG Jianhui, WANG Yong, ZHANG Zhenhua. Effect of terrace forms on water and tillage erosion on a hilly landscape in the Yangtze River Basin, China[J]. Geomorphology, 2014, 216:114.
[16]	闫建梅, 何联君, 何丙辉, 等. 川中丘陵区不同治理模式对土壤微团聚体分形特征的影响[J]. 中国生态农业学报, 2014, 22(11):1294. YAN Jianmei, HE Lianjun, HE Binghui,et al. Effects of different governance patterns of small watershed on fractal features of soil micro-aggregates in the hilly areas of central Sichuan Basin[J]. Chinese Journal of Eco-Agriculture, 2014, 22(11):1294.
[17]	甘凤玲, 王涛, 何丙辉, 等. 汶川震区不同植被下土壤组成及其分型特征[J]. 水土保持研究, 2018, 25(1):84. GAN Fengling, WANG Tao, HE Binghui,et al. Fractal feature of soil in the different types of vegetation in Wenchuan earthquake zone[J]. Research of Soil and Water Conservation, 2018, 25(1):84.
[18]	Wang Yong, Zhang Jianhui, Zhang Zhenhua. Influences of intensive tillage on water-stable aggregate distribution on a steep hillslope[J]. Soil and Tillage Research, 2015(151):82.
[19]	Clemmensen K E, Bahr A, Ovaskainen O, et al. Roots and associated fungi drive long-term carbon sequestration in boreal forest[J]. Science, 2013, 339(6127):1615.
[20]	彭新华, 张斌, 赵其国. 土壤有机碳库与土壤结构稳定性关系的研究进展[J]. 土壤学报, 2004, 41(4):618. PENG Xinhua, ZHANG Bin, ZHAO Qiguo. A review on relationship between soil organic carbon pools and soil structure stability[J]. Acta Pedologica Sinica, 2004, 41(4):618.