Soil Bacterial Community Characteristics of Different Forest Types in Rocky Mountain Area Along Yellow River in Northern Shaanxi

doi:10.11924/j.issn.1000-6850.casb2026-0169

Abstract

Abstract:

This study aimed to reveal the differences in the composition of soil bacterial community and the key environmental drivers across different forest types in the rocky mountainous area along the Yellow River in northern Shaanxi. The Platycladus orientalis forest, Pinus tabuliformis - Amorpha fruticosa forest, Ziziphus jujuba forest, and Pinus tabuliformis - Rhus typhina forest were selected as the study objects, and 16s rRNA high-throughput gene sequencing and soil physicochemical analysis were employed to systematically compare the effects of forest types on soil bacterial community characteristics. The number of soil bacterial OTUs among the four forests followed this order: Pinus tabuliformis - Rhus typhina (6209) > Platycladus orientalis (5817) > Pinus tabuliformis - Amorpha fruticosa (5519) > Ziziphus jujuba (5351), and the β-diversity varied significantly among the forest types. The dominant bacterial phyla were Actinobacteria (26.42%-38.33%), Proteobacteria (16.13%-23.81%), and Acidobacteria (13.66%-21.41%). Soil physicochemical properties explained 83.29% of the variation in bacterial community composition, with total nitrogen (r²=0.8279), soil organic carbon (r²=0.7772), and total phosphorus (r²=0.7765) as the key drivers. The type of forests significantly affects soil bacterial structure in the rocky mountainous area along the Yellow River in northern Shaanxi, with total nitrogen, soil organic carbon, and total phosphorus as the core environmental drivers.

Key words: rocky mountain area along the Yellow River, forest types, soil bacterial community, soil physicochemical properties, vegetation restoration, soil environment

CLC Number:

S791.229

YE Xiaomei, NIU Xiaowei, WANG Peng, XUE Ruizhe, HAN Xia, XU Weizhou, CHEN Shujun. Soil Bacterial Community Characteristics of Different Forest Types in Rocky Mountain Area Along Yellow River in Northern Shaanxi[J]. Chinese Agricultural Science Bulletin, 2026, 42(20): 54-63.

Figures/Tables 11

References 31

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林分类型	坐标	海拔/m	林分密度/(株/hm²)	地貌	林地主要植物
侧柏林	110°44’ E、37°40’ N	758	1208	梁峁坡地	侧柏P. orientalis 河朔荛花Wikstroemia chamaedaphne 白莲蒿Artemisia sacrorum Ledeb
油松-紫穗槐混交林	110°46’ E、37°39’ N	830	1000	梁峁坡地	油松P. tabulaeformis 紫穗槐A. fruticose 白羊草Bothriochloa ischaemum
枣林	110°47’ E、37°34’ N	665.7	500	河川地	枣树Z. jujuba 酸枣Z. jujuba var. 糙隐子草Cleistogenes squarrosa
油松-火炬混交林	110°30’ E、38°12’ N	784	1917	沟坡地	油松P. tabulaeformis 杠柳Periploca sepium 阿尔泰狗娃花Aster altaicus

林分类型	坐标	海拔/m	林分密度/(株/hm²)	地貌	林地主要植物
侧柏林	110°44’ E、37°40’ N	758	1208	梁峁坡地	侧柏P. orientalis 河朔荛花Wikstroemia chamaedaphne 白莲蒿Artemisia sacrorum Ledeb
油松-紫穗槐混交林	110°46’ E、37°39’ N	830	1000	梁峁坡地	油松P. tabulaeformis 紫穗槐A. fruticose 白羊草Bothriochloa ischaemum
枣林	110°47’ E、37°34’ N	665.7	500	河川地	枣树Z. jujuba 酸枣Z. jujuba var. 糙隐子草Cleistogenes squarrosa
油松-火炬混交林	110°30’ E、38°12’ N	784	1917	沟坡地	油松P. tabulaeformis 杠柳Periploca sepium 阿尔泰狗娃花Aster altaicus

土壤理化性质	侧柏林	油松-紫穗槐混交林	枣树林	油松-火炬混交林
SOC/(g/kg)	7.48±1.63 ab	4.04±0.43 b	6.12±0.26 ab	9.37±1.34 a
TN/(g/kg)	0.71±0.17 ab	0.45±0.03 b	0.74±0.16 ab	0.93±0.07 a
HN/(mg/kg)	38.27±7.94 ab	33.57±3.97 b	51.26±7.22 a	52.22±4.41 a
TP/(g/kg)	0.60±0.04 b	0.50±0.01 b	0.49±0.04 b	0.73±0.02 a
AP/(mg/kg)	1.87±0.68 ab	2.13±0.22 ab	3.56±1.09 a	1.13±0.04 b
TK/(g/kg)	26.37±0.53 a	22.54±0.77 b	23.28±0.90 b	26.62±0.66 a
AK/(mg/kg)	106.91±25.71 b	184.48±29.88 a	180.67±16.73 a	107.48±2.40 b
pH	8.46±0.10	8.38±0.06	8.49±0.06	8.41±0.02
EC/(μs/cm)	74.36±5.76 c	94.43±7.19 a	91.23±2.68 ab	76.13±1.98 bc
碳氮比(C:N)	8.39±2.33	8.98±0.33	8.74±2.76	10.09±0.38
碳磷比(C:P)	9.33±2.42 ab	7.94±0.76 b	11.01±2.40 ab	12.72±1.96 a
氮磷比(N:P)	1.24±0.70	0.88±0.01	1.46±0.33	1.26±0.21

土壤理化性质	侧柏林	油松-紫穗槐混交林	枣树林	油松-火炬混交林
SOC/(g/kg)	7.48±1.63 ab	4.04±0.43 b	6.12±0.26 ab	9.37±1.34 a
TN/(g/kg)	0.71±0.17 ab	0.45±0.03 b	0.74±0.16 ab	0.93±0.07 a
HN/(mg/kg)	38.27±7.94 ab	33.57±3.97 b	51.26±7.22 a	52.22±4.41 a
TP/(g/kg)	0.60±0.04 b	0.50±0.01 b	0.49±0.04 b	0.73±0.02 a
AP/(mg/kg)	1.87±0.68 ab	2.13±0.22 ab	3.56±1.09 a	1.13±0.04 b
TK/(g/kg)	26.37±0.53 a	22.54±0.77 b	23.28±0.90 b	26.62±0.66 a
AK/(mg/kg)	106.91±25.71 b	184.48±29.88 a	180.67±16.73 a	107.48±2.40 b
pH	8.46±0.10	8.38±0.06	8.49±0.06	8.41±0.02
EC/(μs/cm)	74.36±5.76 c	94.43±7.19 a	91.23±2.68 ab	76.13±1.98 bc
碳氮比(C:N)	8.39±2.33	8.98±0.33	8.74±2.76	10.09±0.38
碳磷比(C:P)	9.33±2.42 ab	7.94±0.76 b	11.01±2.40 ab	12.72±1.96 a
氮磷比(N:P)	1.24±0.70	0.88±0.01	1.46±0.33	1.26±0.21