Effects of grazing intensity on soil thermal properties and heat flux under Leymus chinensis and Stipa grandis vegetation in Inner Mongolia, China

Gan, Lei; Peng, Xinhua; Peth, Stephan; Horn, Rainer

doi:10.1016/j.still.2011.11.005

Cited by 26 publications

(22 citation statements)

References 52 publications

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“…A compaction event not only decreases the AC (Figure 1a) but also favors the creation of pores available to supply water to plants (PAW in Figure 1b), agreeing with the reports of Gan et al (2012) and Dörner et al (2009b and. Dörner et al (2012) clarified that this phenomenon (reduction of AC to increase PAW) is common in volcanic soils, which have allophane and high amounts of organic C that allow them to have a large volume of pores at different matric potentials due to the bimodal nature of the pore system (Dörner et al, 2010b).…”

Section: Discussionsupporting

confidence: 90%

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Functional resistance and resilience of the pore system of an andisol exposed to different strategies of pasture improvement under sheep grazing

Ivelic-Sáez

Zúñiga

Valle

et al. 2015

J. Soil Sci. Plant Nutr.

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In southern Chile, different strategies have been utilized to improve the production levels of degraded pastures. Due to grazing, soils are subjected to mechanical and hydraulic stresses throughout the year. The aim of the study was to evaluate the effect of different strategies to improve a degraded naturalized pasture under sheep grazing on the resistance and resilience of the pore system of an Andisol subjected to mechanical and hydraulic stresses. Undisturbed soil samples were collected from two tilled, seeded and fertilized pastures (T1-T2), a non-tilled degraded and naturalized pasture with no fertilization (T3), a fertilized pasture (T4) and a non-tilledfertilized and ungrazed pasture (T5). Also, cylinders were filled with homogenized soil (T6). The tilled and non-tilled pastures (T1-T5) were able to maintain their functions of storage and transport of water and air as well as their mechanical properties against both stresses. No significant differences between the pasture improvement strategies were observed when evaluated during the second year after the implementation of the improvement strategies, which highlights the high resistance and resilience capacity of the Andisol. However, some tendencies (e.g. while the air capacity and permeability tended to increase following mechanical stress, plant available water increased; the opposite was observed following hydraulic stress) and significant differences (due to the simulated effect of aggregate destruction during tillage, a decrease in air capacity, and an increase in soil shrinkage capacity after compaction were assessed) were observed, which highlight the necessity for further studies to better understand the complex interactions in pasture systems.

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Section: Discussionsupporting

confidence: 90%

“…Chernozem soils under intensive and extensive sheep grazing (Reszkowska et al, 2011 andGan et al, 2012).…”

Section: Effect Of Mechanical and Hydraulic Stresses On The Functionsmentioning

confidence: 99%

Functional resistance and resilience of the pore system of an andisol exposed to different strategies of pasture improvement under sheep grazing

Ivelic-Sáez

Zúñiga

Valle

et al. 2015

J. Soil Sci. Plant Nutr.

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“…This can be ascribed to: i) different thermal properties as a consequence of soil tillage and ii) the insulation effect of plant residues. The tilled plots presented the highest water contents, since soil thermal diffusivity depends on the soil water content (Gan et al, 2012). The higher average temperatures of the tilled soils could be a response of the higher thermal diffusivity.…”

Section: Pasture Improvement Effects On Soil Physical Quality and Tramentioning

confidence: 94%

Short-term effects of different pasture improvement treatments on the physical quality of an andisol

Dörner

Zúñiga

López

2013

J. Soil Sci. Plant Nutr.

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The improvement of degraded pastures is important for increasing pasture herbage mass and animal production in southern Chile. While research has normally focused on how animal treading affects soil compaction, no major work has yet been done to define the impact of pasture improvement managements on soil physical functions, particularly when the initial situation is a degraded pasture. Thus, the aim of this study is to define the shortterm effects of different pasture improvement managements on the physical quality and related processes of a volcanic ash soil. Four treatments were defined: two tilled, fertilized and seeded plots (T1 and T2), one non-tilled and non-fertilized plot (T3) and one non-tilled and fertilized plot (T4), all of which were compared to the initial situation of a highly degraded pasture (IS). Undisturbed soil samples were collected (1-10 cm) and the volumetric water content and temperature was continuously monitored at the 10 cm depth. The short-term effects of pasture improvement managements on soil physical quality and related processes differed in relation to the treatment method. As compared to the non-tilled plots, the aggregate destruction after tillage induced an increase in the water holding capacity, but a decrease in the air capacity and pore-continuity values due to grazing. The physical quality assessed by the S-Index reflected a good soil structural quality (S > 0.035). The tilled plots presented a higher S-Index as compared to the non-tilled plots, which is related to a slightly lower mechanical strength and larger water holding capacity. The latter also increased due to tillage and was positively correlated to pasture yields during the first intensive soil drying. Soil temperature differences between treatments were assessed and can be related to the higher water contents in the tilled plots and the presence of broad-leaf species in the non-tilled pastures. Finally, in order to properly understand how the implementation of pasture improvement managements affects the soil physical quality and related processes, long-term studies are required.

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“…At the same time, the change of temperature field can also cause the potential energy imbalance, to a certain extent, affected the vertical distribution of soil moisture content [2]. Soil heat capacity mainly depends on soil moisture content, and soil heat capacity of different land use types with the increase of soil moisture content increased [3]. Yue et al [4] studied the soil temperature, humidity and thermal characteristics before and after precipitation in the semi-arid grassland of the Loess Plateau, and proved that the precipitation changed the soil moisture and also made the soil heat capacity changed.…”

Section: Introductionmentioning

confidence: 99%

Effect of soil moisture on spatial variation of soil heat capacity

Tao¹,

Zheng²,

Ying³

et al. 2017

Proceedings of the 2017 5th International Conference on Machinery, Materials and Computing Technology (ICMMCT 2017)

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Abstract. In this research, the variations and spatial distribution of soil heat capacity in soybean field and sugarcane field under drought, moderate and humid soil moisture conditions were studied. The soil heat capacity in order to analyze spatial distribution by geostatistical analyst in each plot covered was calculated by the measured soil moisture content, furthermore, the states of dry, moderate and wet soil moisture conditions were determined. The result showed the soil heat capacity was greatest in sugarcane plot but lowest in soybean plot, which was similar to the change of soil moisture content under three soil moisture conditions. It suggested that the soil water content was a primary factor resulting in the change of the soil heat capacity. According to the results of geostatistical analysis of soil heat capacity, the spatial structure ratio of soil heat capacity is 57% -93% under three soil moisture conditions, which belongs to strong moderate spatial relativity. The high threshold spatial distribution of soil heat capacity in soybean and sugarcane fields is stable under drought and humid conditions, which indicates that the soil itself has the ability to restore the stability of its spatial distribution.

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Effects of grazing intensity on soil thermal properties and heat flux under Leymus chinensis and Stipa grandis vegetation in Inner Mongolia, China

Cited by 26 publications

References 52 publications

Functional resistance and resilience of the pore system of an andisol exposed to different strategies of pasture improvement under sheep grazing

Functional resistance and resilience of the pore system of an andisol exposed to different strategies of pasture improvement under sheep grazing

Short-term effects of different pasture improvement treatments on the physical quality of an andisol

Effect of soil moisture on spatial variation of soil heat capacity

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