Effects of fine particulate matter input on soil carbon and nitrogen accumulation after establishment of Haloxylon ammodendron plantations on shifting sand dunes in arid area

doi:10.7522/j.issn.1000-694X.2021.00045

Journal of Desert Research ›› 2021, Vol. 41 ›› Issue (5): 147-156.DOI: 10.7522/j.issn.1000-694X.2021.00045

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Effects of fine particulate matter input on soil carbon and nitrogen accumulation after establishment of Haloxylon ammodendron plantations on shifting sand dunes in arid area

Fangjiao An¹^,²(), Yongzhong Su¹(), Ziru Niu¹^,², Tingna Liu¹

^1.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:2021-01-26 Revised:2021-04-06 Online:2021-09-20 Published:2021-09-23
Contact: Yongzhong Su

Abstract

Abstract:

Different ages （0-， 3-， 6-， 11-， 19-， 28- and 46-years） of Haloxylon ammodendron plantations in Linze desert-oasis ecotone of northwestern China were selected and surface soil （0-10 cm） under and outside the canopy were sampled， to explore the changes of soil particle size and carbon and nitrogen in particle-size fractions during the development of sand-fixing H. ammodendron plantations， and analyze the contribution of soil fine particles to carbon and nitrogen accumulation. The results showed that soil carbon and nitrogen increased significantly with the growth of H. ammodendron， and inorganic carbon （SIC） was 2.7-11.2 times of organic carbon （SOC）. The content of soil fine particles and calcium carbonate （CaCO₃） were significantly negatively correlated with soil erodible fraction （EF）， and significantly positively correlated with the thickness of soil crust. The thickness of soil crust under the canopy was 1.9-2.6 times that outside canopy. The content of SOC， SIC and total nitrogen （TN） in each particle-size fraction increased significantly， and the content of silt + clay fractions were significantly higher than other fractions. The contribution of silt + clay fractions to SOC， SIC and TN increased from 25.4%， 8.5% and 16.1% in year 0 to 59.7%， 33.9% and 51.9% in year 46. In arid areas， the increase of silt + clay fractions and CaCO₃ content jointly promoted the formation and development of soil physical crusts， which led to the stability of the sand surface. Meanwhile， the increase of silt + clay fractions were also the main mechanism of soil carbon and nitrogen sequestration.

Key words: sand-fixing Haloxylon ammodendron plantation, sand-fixation year, particle-size fractions, soil carbon and nitrogen sequestration, edge of oasis

CLC Number:

S153.6

Fangjiao An, Yongzhong Su, Ziru Niu, Tingna Liu. Effects of fine particulate matter input on soil carbon and nitrogen accumulation after establishment of Haloxylon ammodendron plantations on shifting sand dunes in arid area[J]. Journal of Desert Research, 2021, 41(5): 147-156.

Figures/Tables 8

References 48

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固沙年限/a	1—0.25 mm (中粗砂)		0.25—0.1 mm (细砂)		0.1—0.05 mm (极细砂)		0.05—0.002 mm (粉粒)		<0.002mm (黏粒)
固沙年限/a	冠层下	冠层外	冠层下	冠层外	冠层下	冠层外	冠层下	冠层外	冠层下	冠层外
0	11.96±2.59^a	11.96±2.59^cd	77.81±2.89^a	77.81±2.89^a	5.80±0.44^d	5.80±0.44^d	1.29±0.08^c	1.29±0.08^f	3.14±0.16^c	3.14±0.16^d
3	7.56±1.07^d	7.94±1.62^e	78.68±1.54^a	79.06±2.23^a	8.37±0.79^c	7.78±0.46^c	1.59±0.20^c	1.47±0.21^f	3.77±0.11^c	3.75±0.02^d
6	10.05±1.54^abc	14.72±2.00^abc	69.70±0.65^b	65.59±1.93^b	13.72±0.82^b	13.32±0.33^b	1.94±0.02^c	1.89±0.06^e	4.59±0.09^c	4.48±0.14^cd
11	10.97±0.87^ab	15.90±0.44^a	64.49±0.43^c	61.54±1.31^c	14.00±1.31^b	14.00±0.82^b	4.23±0.07^b	3.28±0.03^d	6.32±0.23^b	5.28±0.07^bc
19	7.67±1.64^cd	12.04±2.34^bcd	63.79±1.58^c	60.04±2.28^c	16.18±0.85^a	16.97±0.30^a	5.45±0.09^a	4.85±0.11^c	6.91±0.33^b	6.10±0.14^ab
28	8.47±0.48^bcd	9.49±1.89^de	63.68±2.80^c	61.31±1.15^c	14.32±1.14^b	16.96±0.93^a	5.95±0.93^a	5.19±0.23^b	7.57±1.93^ab	7.06±1.04^a
46	10.22±1.11^abc	14.86±2.95^abc	61.90±1.80^c	59.74±1.79^c	13.03±0.66^b	12.62±1.70^b	5.93±1.01^a	5.72±0.12^a	8.91±1.10^a	7.05±1.02^a
F	3.98	5.86	42	52	50.67	76.49	48.20	557.84	18.28	9.66
P	<0.05	<0.05	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001

固沙年限/a	1—0.25 mm (中粗砂)		0.25—0.1 mm (细砂)		0.1—0.05 mm (极细砂)		0.05—0.002 mm (粉粒)		<0.002mm (黏粒)
固沙年限/a	冠层下	冠层外	冠层下	冠层外	冠层下	冠层外	冠层下	冠层外	冠层下	冠层外
0	11.96±2.59^a	11.96±2.59^cd	77.81±2.89^a	77.81±2.89^a	5.80±0.44^d	5.80±0.44^d	1.29±0.08^c	1.29±0.08^f	3.14±0.16^c	3.14±0.16^d
3	7.56±1.07^d	7.94±1.62^e	78.68±1.54^a	79.06±2.23^a	8.37±0.79^c	7.78±0.46^c	1.59±0.20^c	1.47±0.21^f	3.77±0.11^c	3.75±0.02^d
6	10.05±1.54^abc	14.72±2.00^abc	69.70±0.65^b	65.59±1.93^b	13.72±0.82^b	13.32±0.33^b	1.94±0.02^c	1.89±0.06^e	4.59±0.09^c	4.48±0.14^cd
11	10.97±0.87^ab	15.90±0.44^a	64.49±0.43^c	61.54±1.31^c	14.00±1.31^b	14.00±0.82^b	4.23±0.07^b	3.28±0.03^d	6.32±0.23^b	5.28±0.07^bc
19	7.67±1.64^cd	12.04±2.34^bcd	63.79±1.58^c	60.04±2.28^c	16.18±0.85^a	16.97±0.30^a	5.45±0.09^a	4.85±0.11^c	6.91±0.33^b	6.10±0.14^ab
28	8.47±0.48^bcd	9.49±1.89^de	63.68±2.80^c	61.31±1.15^c	14.32±1.14^b	16.96±0.93^a	5.95±0.93^a	5.19±0.23^b	7.57±1.93^ab	7.06±1.04^a
46	10.22±1.11^abc	14.86±2.95^abc	61.90±1.80^c	59.74±1.79^c	13.03±0.66^b	12.62±1.70^b	5.93±1.01^a	5.72±0.12^a	8.91±1.10^a	7.05±1.02^a
F	3.98	5.86	42	52	50.67	76.49	48.20	557.84	18.28	9.66
P	<0.05	<0.05	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001

固沙年限/a	EF/%		St/%
固沙年限/a	冠层下	冠层外	冠层下	冠层外
0	51.44±0.67^a	51.44±0.67^a	1.38±0.06^d	1.38±0.06^de
3	47.85±0.47^b	49.12±0.19^b	1.36±0.16^d	1.00±0.04^e
6	44.48±0.12^c	46.61±0.18^c	2.47±0.21^c	1.94±0.39^cd
11	42.13±0.38^d	45.09±0.28^c	2.67±0.23^c	2.29±0.38^abc
19	40.56±0.29^e	42.75±0.97^d	2.64±0.12^c	2.07±0.38^bc
28	39.60±1.66^e	41.97±2.66^d	3.57±0.15^a	2.56±0.36^ab
46	36.38±1.13^f	38.74±0.78^e	3.23±0.29^b	2.74±0.36^a
F	112.695	43.28	61.825	11.558
P	<0.001	<0.001	<0.001	<0.001

固沙年限/a	EF/%		St/%
固沙年限/a	冠层下	冠层外	冠层下	冠层外
0	51.44±0.67^a	51.44±0.67^a	1.38±0.06^d	1.38±0.06^de
3	47.85±0.47^b	49.12±0.19^b	1.36±0.16^d	1.00±0.04^e
6	44.48±0.12^c	46.61±0.18^c	2.47±0.21^c	1.94±0.39^cd
11	42.13±0.38^d	45.09±0.28^c	2.67±0.23^c	2.29±0.38^abc
19	40.56±0.29^e	42.75±0.97^d	2.64±0.12^c	2.07±0.38^bc
28	39.60±1.66^e	41.97±2.66^d	3.57±0.15^a	2.56±0.36^ab
46	36.38±1.13^f	38.74±0.78^e	3.23±0.29^b	2.74±0.36^a
F	112.695	43.28	61.825	11.558
P	<0.001	<0.001	<0.001	<0.001

Effects of fine particulate matter input on soil carbon and nitrogen accumulation after establishment of Haloxylon ammodendron plantations on shifting sand dunes in arid area

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