Effect of land use on soil infiltration in the desert-oasis of Hexi Corridor

doi:10.7522/j.issn.1000-694X.2021.00081

Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (6): 148-156.DOI: 10.7522/j.issn.1000-694X.2021.00081

Effect of land use on soil infiltration in the desert-oasis of Hexi Corridor

Chengpeng Sun¹^,²(), Wenzhi Zhao¹()

^1.National Field Scientific Observation and Research Station of Cropland Ecosystem in Linze / Linze Inland River Basin Research Station，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China
^2.University of Chinese Academy of Sciences，Beijing 100049，China

Received:2021-04-15 Revised:2021-08-25 Online:2021-11-20 Published:2021-12-17
Contact: Wenzhi Zhao

Abstract

Abstract:

Oases are a complex mosaic of various landscapes such as cropland， woodland， desert land， lake and wetland. As the major component of oases， it is necessary to examine soil infiltration under these land use types as well as related factors among cropland， woodland and desert land， this is of great significance for understanding the water cycle and transformation in oases. To explore the effects of land use types on soil infiltration characteristics and related mechanisms in the desert-oasis of Hexi Corridor， dyeing Beerkan infiltration experiments and soil samples of 0-40 cm soil layers were conducted. The results showed that：（1） there was a significant difference between the three land use types， compared with desert land， silt and clay contents of 0-40 cm soil layers in protection forest and cropland sites increased by 100.25% and 285.23%， respectively； But land use types had little effect on dry density and total porosity， only dry density of surface layer （0-10 cm） in protection forest decreased （1.37±0.12 g·cm^-3） and the total porosity increased （48.22%±4.56%）. （2） Soil infiltration capacities also varied， compared to desert land sites， the initial infiltration rate in protection forest and cropland sites decreased by 75.49% and 37.05%， respectively， on the other hand， the saturated hydraulic conductivity decreased by 80.04% and 42.02%， respectively. （3） Land use types significantly affected soil water flow patterns， the heterogeneity of soil infiltration in protection forest and cropland sites was significantly stronger than that in desert land sites， the macropore flow fraction in protection forest and cropland sites was 3.84 times and 5.46 times higher than that in desert land sites. （4） A significant negative correlation was found between the initial infiltration rate and saturated hydraulic conductivity and soil silt and clay contents， while the macropore flow fraction and length index and soil silt and clay contents and total porosity demonstrated a significantly positively correlation， indicating soil infiltration capacities and water flow patterns were affected by soil texture and soil texture was the critical regulator in soil infiltration response to land use types.

Key words: oases, land use, soil infiltration capacities, soil water flow patterns

CLC Number:

S152.7

Chengpeng Sun, Wenzhi Zhao. Effect of land use on soil infiltration in the desert-oasis of Hexi Corridor[J]. Journal of Desert Research, 2021, 41(6): 148-156.

Figures/Tables 6

References 39

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土地利用方式	土层 /cm	机械组成/%			干密度 /(g·cm^-3)	总孔隙度 /%
土地利用方式	土层 /cm	砂粒	粉粒	黏粒	干密度 /(g·cm^-3)	总孔隙度 /%
沙荒地	0—10	89.043±5.309^Aa	8.858±4.633^Ca	2.06±0.715^Ca	1.516±0.05^Aa	42.778±1.879^Ca
	10—20	91.716±5.003^Aa	6.669±4.679^Ca	1.485±0.670^Ca	1.499±0.041^Ab	43.422±1.546^Ca
	20—40	91.170±6.382^Aa	7.210±5.868^Ca	1.62±0.752^Ba	1.483±0.054^Ab	44.022±2.040^Ca
	0—40	90.643±5.590^A	7.579±5.063^C	1.722±0.740^C	1.500±0.049^A	43.407±1.863^B
防护林地	0—10	78.589±6.878^Bb	17.959±5.935^Ba	3.440±1.127^Ba	1.372±0.121^Bb	48.216±4.562^Aa
	10—20	82.031±5.752^Ba	15.211±4.978^Bab	2.758±0.966^Bb	1.461±0.083^Aa	44.855±3.141^Bb
	20—40	83.417±4.675^Ba	13.773±3.98^Bb	2.734±0.888^Bb	1.458±0.076^Aa	44.984±2.870^Bb
	0—40	81.346±6.062^B	15.648±5.217^B	2.977±1.030^B	1.431±0.102^B	46.019±3.854^A
农田	0—10	63.136±11.659^Cb	31.771±9.85^Aa	5.093±2.062^Aa	1.460±0.048^ABb	44.915±1.817^Ba
	10—20	64.627±9.233^Ca	30.457±7.819^Ab	4.916±1.799^Aa	1.470±0.069^Aa	44.533±2.601^Ab
	20—40	64.748±11.670^Ca	30.423±10.325^Ab	4.829±1.898^Aa	1.481±0.043^Aa	44.120±1.631^Ac
	0—40	64.170±10.689^C	30.884±9.200^A	4.946±1.882^A	1.470±0.054^AB	44.522±2.039^AB

土地利用方式	土层 /cm	机械组成/%			干密度 /(g·cm^-3)	总孔隙度 /%
土地利用方式	土层 /cm	砂粒	粉粒	黏粒	干密度 /(g·cm^-3)	总孔隙度 /%
沙荒地	0—10	89.043±5.309^Aa	8.858±4.633^Ca	2.06±0.715^Ca	1.516±0.05^Aa	42.778±1.879^Ca
	10—20	91.716±5.003^Aa	6.669±4.679^Ca	1.485±0.670^Ca	1.499±0.041^Ab	43.422±1.546^Ca
	20—40	91.170±6.382^Aa	7.210±5.868^Ca	1.62±0.752^Ba	1.483±0.054^Ab	44.022±2.040^Ca
	0—40	90.643±5.590^A	7.579±5.063^C	1.722±0.740^C	1.500±0.049^A	43.407±1.863^B
防护林地	0—10	78.589±6.878^Bb	17.959±5.935^Ba	3.440±1.127^Ba	1.372±0.121^Bb	48.216±4.562^Aa
	10—20	82.031±5.752^Ba	15.211±4.978^Bab	2.758±0.966^Bb	1.461±0.083^Aa	44.855±3.141^Bb
	20—40	83.417±4.675^Ba	13.773±3.98^Bb	2.734±0.888^Bb	1.458±0.076^Aa	44.984±2.870^Bb
	0—40	81.346±6.062^B	15.648±5.217^B	2.977±1.030^B	1.431±0.102^B	46.019±3.854^A
农田	0—10	63.136±11.659^Cb	31.771±9.85^Aa	5.093±2.062^Aa	1.460±0.048^ABb	44.915±1.817^Ba
	10—20	64.627±9.233^Ca	30.457±7.819^Ab	4.916±1.799^Aa	1.470±0.069^Aa	44.533±2.601^Ab
	20—40	64.748±11.670^Ca	30.423±10.325^Ab	4.829±1.898^Aa	1.481±0.043^Aa	44.120±1.631^Ac
	0—40	64.170±10.689^C	30.884±9.200^A	4.946±1.882^A	1.470±0.054^AB	44.522±2.039^AB

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Effect of land use on soil infiltration in the desert-oasis of Hexi Corridor

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