Effects of artificially inoculated composite algal solutions on biological soil crusts and soil properties in engineering-disturbed areas of the Hexi Corridor

doi:10.7522/j.issn.1000-694X.2025.00047

Journal of Desert Research ›› 2025, Vol. 45 ›› Issue (6): 37-46.DOI: 10.7522/j.issn.1000-694X.2025.00047

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Effects of artificially inoculated composite algal solutions on biological soil crusts and soil properties in engineering-disturbed areas of the Hexi Corridor

Hongmei Kang¹(), Jun Zhang¹, Xin Li¹, Jinpeng Liu²()

^1.Key Laboratory of Microbial Resources Exploitation and Application of Gansu Province，Institute of Biology /, Gansu Academy of Sciences，Lanzhou 730000，China
^2.Department of Research and Development, Gansu Academy of Sciences，Lanzhou 730000，China

Received:2024-12-09 Revised:2025-03-11 Online:2025-11-20 Published:2025-11-26
Contact: Jinpeng Liu

Abstract

Abstract:

This study investigates the effects of artificially inoculated composite algal solutions on the growth of Biological Soil Crusts （BSC） and soil properties in engineering-disturbed areas of the Hexi Corridor. In Gulang， Gansu Province， five types of disturbed surfaces （S） were simulated， and composite algal solutions （Treatments， T） were applied to observe changes in BSC growth and soil nutrients under different disturbed surfaces and treatments. The results show that BSC grew well on all disturbed surfaces， with no significant wind erosion observed. The disturbed surface （S） had a highly significant impact on BSC growth， soil nutrients， and soil enzyme activity （P<0.001）. Although the treatment （T） did not show an immediate effect on BSC growth， over time， the biomass and thickness of BSC， as well as soil nutrients and soil phosphatase activity， significantly increased across all disturbed surfaces （P<0.05， 2 years）. The north-facing slope of the filled embankment exhibited the fastest BSC growth rate （1.629 µg Chl a·g⁻¹， 2 years）， with a 439.4% increase in BSC biomass compared to the initial three months. The BSC thickness， soil enzyme activity， available phosphorus， and potassium content were significantly higher on this slope than on other disturbed surfaces （P<0.05）. The composite algal solution effectively induced BSC formation， significantly increasing soil hardness， BSC biomass， alkaline phosphatase activity， and soil nutrients （P<0.05）. A new sand-fixing method combining algal solutions， microbial agents， and Artemisia sphaerocephala gum can be used for rapid BSC restoration after engineering disturbances. The type of disturbed surface significantly influences the development of artificial BSC， with north-facing slopes being more conducive to BSC colonization and growth.

Key words: Hexi Corridor, disturbed surface, artificial biological soil crusts, wind erosion prevention, soil nutrient

CLC Number:

S157.2

Hongmei Kang, Jun Zhang, Xin Li, Jinpeng Liu. Effects of artificially inoculated composite algal solutions on biological soil crusts and soil properties in engineering-disturbed areas of the Hexi Corridor[J]. Journal of Desert Research, 2025, 45(6): 37-46.

Figures/Tables 9

References 40

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参数	扰动面S（n=12）		处理T（n=15）		S×T
参数	3个月	2 a	3个月	2 a	3个月	2 a
dF	4		3		12
SWC	97.176^***	1.293^ns	1.926^ns	0.773^ns	0.875^ns	0.616^ns
pH	7.667^***	17.244^***	0.658^ns	0.446^ns	3.328^**	2.313^*
土壤硬度	6.576^***	3.285^*	0.978^ns	5.171^**	2.713^**	1.736^ns
叶绿素a	10.429^***	9.103^***	2.224^ns	8.166^***	1.686^ns	2.902^**
BSC厚度	3.194^*	24.807^***	0.282^ns	2.934^*	1.362^ns	1.028^ns
碱性磷酸酶	13.909^***	18.557^***	2.563^ns	4.125^*	2.670^**	2.218^*
脲酶	20.290^***	36.330^***	0.708^ns	1.641^ns	2.948^**	1.565^ns
过氧化氢酶	16.405^***	24.832^***	1.684^ns	2.355^ns	2.942^**	2.371^*
有机质	—	26.315^***	—	1.942^ns	—	2.175^*
全氮	—	10.798^***	—	1.742^ns	—	3.282^**
有效磷	—	45.868^***	—	3.153^*	—	5.045^***
速效钾	—	15.389^***	—	3.403^*	—	1.108^ns

参数	扰动面S（n=12）		处理T（n=15）		S×T
参数	3个月	2 a	3个月	2 a	3个月	2 a
dF	4		3		12
SWC	97.176^***	1.293^ns	1.926^ns	0.773^ns	0.875^ns	0.616^ns
pH	7.667^***	17.244^***	0.658^ns	0.446^ns	3.328^**	2.313^*
土壤硬度	6.576^***	3.285^*	0.978^ns	5.171^**	2.713^**	1.736^ns
叶绿素a	10.429^***	9.103^***	2.224^ns	8.166^***	1.686^ns	2.902^**
BSC厚度	3.194^*	24.807^***	0.282^ns	2.934^*	1.362^ns	1.028^ns
碱性磷酸酶	13.909^***	18.557^***	2.563^ns	4.125^*	2.670^**	2.218^*
脲酶	20.290^***	36.330^***	0.708^ns	1.641^ns	2.948^**	1.565^ns
过氧化氢酶	16.405^***	24.832^***	1.684^ns	2.355^ns	2.942^**	2.371^*
有机质	—	26.315^***	—	1.942^ns	—	2.175^*
全氮	—	10.798^***	—	1.742^ns	—	3.282^**
有效磷	—	45.868^***	—	3.153^*	—	5.045^***
速效钾	—	15.389^***	—	3.403^*	—	1.108^ns

扰动面	pH		土壤硬度/（kg·cm^-2）		Chl a/（μg·g^-1）		BSC厚度/mm
扰动面	3个月	2 a	3个月	2 a	3个月	2 a	3个月	2 a
Ⅰ	8.24±0.02^b	8.67±0.01^a	1.94±0.23^c	3.82±0.31^b	0.56±0.06^ab	0.93±0.07^ab	0.67±0.03^bc	2.18±0.10^a
Ⅱ	8.23±0.01^b	8.72±0.15^a	1.58±0.14^b	3.97±0.42^b	0.33±0.05^a	0.68±0.12^a	0.68±0.04^c	2.68±0.12^b
Ⅲ	8.20±0.01^b	8.83±0.04^b	1.46±0.13^b	3.63±0.39^b	0.91±0.12^c	1.21±0.12^bc	0.60±0.03^ab	3.46±0.13^c
Ⅳ	8.15±0.02^a	9.04±0.07^c	0.73±0.07^a	2.59±0.12^a	0.30±0.05^a	1.63±0.31^c	0.62±0.02^ab	4.02±0.15^d
Ⅴ	8.23±0.01^b	8.85±0.02^b	1.50±0.08^b	2.50±0.14^a	0.71±0.12^bc	1.35±0.13^bc	0.54±0.01^a	3.71±0.17^cd

扰动面	pH		土壤硬度/（kg·cm^-2）		Chl a/（μg·g^-1）		BSC厚度/mm
扰动面	3个月	2 a	3个月	2 a	3个月	2 a	3个月	2 a
Ⅰ	8.24±0.02^b	8.67±0.01^a	1.94±0.23^c	3.82±0.31^b	0.56±0.06^ab	0.93±0.07^ab	0.67±0.03^bc	2.18±0.10^a
Ⅱ	8.23±0.01^b	8.72±0.15^a	1.58±0.14^b	3.97±0.42^b	0.33±0.05^a	0.68±0.12^a	0.68±0.04^c	2.68±0.12^b
Ⅲ	8.20±0.01^b	8.83±0.04^b	1.46±0.13^b	3.63±0.39^b	0.91±0.12^c	1.21±0.12^bc	0.60±0.03^ab	3.46±0.13^c
Ⅳ	8.15±0.02^a	9.04±0.07^c	0.73±0.07^a	2.59±0.12^a	0.30±0.05^a	1.63±0.31^c	0.62±0.02^ab	4.02±0.15^d
Ⅴ	8.23±0.01^b	8.85±0.02^b	1.50±0.08^b	2.50±0.14^a	0.71±0.12^bc	1.35±0.13^bc	0.54±0.01^a	3.71±0.17^cd

扰动面	碱性磷酸酶/（μg·g^-1-24h）		脲酶(NH₃-N μg·g^-1-24h)		过氧化氢酶/（mL·g^-1）
扰动面	3个月	2 a	3个月	2 a	3个月	2 a
Ⅰ	20.71±2.04^a	38.78±3.84^a	0.56±0.05^a	1.19±0.05^a	0.61±0.01^a	0.66±0.01^a
Ⅱ	38.65±2.27^b	42.53±3.66^ab	0.86±0.07^b	2.00±0.06^b	0.69±0.01^c	0.69±0.02^b
Ⅲ	41.56±6.31^bc	53.6±9.05^b	1.05±0.07^c	2.13±0.15^bc	0.69±0.01^c	0.71±0.01^b
Ⅳ	51.93±4.07^c	80.5±4.01^c	1.02±0.09^c	2.85±0.17^d	0.63±0.01^ab	0.77±0.01^c
Ⅴ	48.63±3.37^bc	73.12±3.88^c	1.27±0.05^d	2.40±0.04^c	0.65±0.01^b	0.76±0.01^c

Effects of artificially inoculated composite algal solutions on biological soil crusts and soil properties in engineering-disturbed areas of the Hexi Corridor

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扰动面	有机质/（g·kg^-1）	全N /（g·kg^-1）	有效P/（mg·kg^-1）	速效K/（mg·kg^-1）
Ⅰ	6.78±0.38^b	1.82±0.35^a	5.75±0.40^b	114.25±7.24^a
Ⅱ	7.48±0.11^b	4.71±0.71^b	9.43±0.60^c	142.25±7.04^a
Ⅲ	7.14±0.26^b	4.77±0.51^b	4.35±0.21^a	156.20±28.49^a
Ⅳ	6.73±0.35^b	2.56±0.41^a	11.35±0.95^d	304.00±37.12^b
Ⅴ	4.31±0.16^a	2.80±0.46^a	6.88±0.51^b	117.35±5.31^a

处理	土壤硬度/（kg·cm^-2）	Chl a/（μg·g^-1）	BSC厚度 /mm	碱性磷酸酶/（μg·g^-1-24h）	有效P/（mg·kg^-1）	速效K/（mg·kg^-1）	H 指数（扰动面Ⅴ）
1(CK)	1.99±0.38^a	0.702±0.101^a	2.71±0.19^a	47.35±5.97^a	6.79±0.85^a	122.27±11.99^a	1.59±0.13
2	3.67±0.23^b	1.319±0.123^b	3.32±0.11^b	60.60±6.31^b	8.41±0.97^b	201.80±35.08^b	1.80±0.27
3	3.10±0.22^b	1.345±0.170^b	3.31±0.13^b	57.05±4.78^ab	7.49±0.90^ab	175.53±25.64^ab	2.06±0.26
4	3.48±0.23^b	1.345±0.209^b	3.18±0.12^b	65.82±7.01^b	7.52±0.58^ab	167.54±24.68^ab	1.84±0.12

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