Relationship between soil nutrient characteristics and litter quality of three typical stands in Luoshan， Ningxia， China

doi:10.7522/j.issn.1000-694X.2025.00124

Journal of Desert Research ›› 2025, Vol. 45 ›› Issue (3): 326-336.DOI: 10.7522/j.issn.1000-694X.2025.00124

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Relationship between soil nutrient characteristics and litter quality of three typical stands in Luoshan， Ningxia， China

Jingliang Chen¹^,²(), Songwei Tan³, Chao Liu³, Lei Huang⁴()

^1.Shapotou Desert Research and Experiment 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
^3.Ningxia Luoshan National Nature Reserve Management Bureau，Wuzhong 751999，Ningxia，China
^4.College of Forestry and Prataculture，Ningxia University，Yinchuan 750021，China

Received:2025-03-30 Revised:2025-05-27 Online:2025-05-20 Published:2025-06-30
Contact: Lei Huang

Abstract

Abstract:

The litter layer and soil layer are important carriers of material cycling and energy flow in forest ecosystems. Quantifying the characteristics of forest soil nutrients and their relationship with litter quality and nutrient utilization efficiency is crucial for understanding nutrient cycling in arid mountain forest ecosystems and evaluating productivity.This study focused on pure forests of Qinghai spruce， pure pine forests， and Qinghai spruce-pine mixed forests in the Luoshan National Nature Reserve in Ningxia. Based on plot surveys and measurements of soil and litter samples， redundancy analysis （RDA） was used to elucidate the relationship between soil nutrient characteristics of three typical forest stands and litter quality and nutrient utilization efficiency.（1） The nutrient content in the soil of the three typical forest stands was significantly higher in the 0-10 cm layer than in the 10-20 cm and 20-40 cm layers （P<0.05）， with no significant difference between the 10-20 cm and 20-40 cm layers （P>0.05）. （2） The nutrient content in the litter decomposition layers of the three forest types followed the order of total C>N>K>P， and the total phosphorus content and litter storage of the Qinghai spruce-pine mixed forest were significantly higher than those of the pure forests （P<0.05）. （3） The C/N， C/P， and N/P ratios of litter in pure forests were all higher than those in the Qinghai spruce-pine mixed forest， with the C/N and C/P values in the undecomposed layer significantly higher than those in the semi-decomposed layer （P<0.05）. The N/P values were all less than 14， and the phosphorus nutrient utilization efficiency in pure forests was significantly higher than that in the Qinghai spruce-pine mixed forest （P<0.05）. （4） The return of nutrients from litter in the three forest types was in the order of C>N>P in each decomposition layer， and the Qinghai spruce-pine mixed forest was higher than the pure forests. （5） RDA showed that the phosphorus content in the undecomposed layer of litter （UP）， phosphorus nutrient utilization efficiency （UPNUE）， nitrogen-phosphorus ratio （UN/P）， carbon-phosphorus ratio （UC/P）， and phosphorus nutrient utilization efficiency in the semi-decomposed layer （SPNUE）， carbon-nitrogen ratio （SC/N） of litter in the 0~10 cm soil layer had a significant effect on the change of soil nutrient content. Soil nutrient content was significantly positively correlated with UP （P<0.05）， while significantly negatively correlated with UPNUE （P<0.05）.The Qinghai spruce-pine mixed forest is more advantageous than pure forests in soil nutrient accumulation to meet the nutrient requirements of plant growth. Nitrogen is the main limiting element for the three forest types. Within the range of nitrogen limitation， pure forests are more susceptible to the influence of phosphorus content than Qinghai spruce-pine mixed forests.

Key words: forest litter, soil nutrients, litter quality, nutrient return, nutrient use efficiency

CLC Number:

Jingliang Chen, Songwei Tan, Chao Liu, Lei Huang. Relationship between soil nutrient characteristics and litter quality of three typical stands in Luoshan， Ningxia， China[J]. Journal of Desert Research, 2025, 45(3): 326-336.

Figures/Tables 9

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特征	林分类型
特征	青海云杉纯林QY	油松纯林 YS	青海云彬-油松混交林QY＋YS
经度/（E）	106°28′	106°28′	106°28′
纬度/（N）	37°30′	37°28′	37°28′
海拔/m	2 531.5	2 331.5	2 378.3
土壤类型	灰褐土	灰褐土	灰褐土
坡向	阴	阴	阴
坡度/（°）	30.4	26.5	20.6
土壤pH	8.27±0.07^b	8.56±0.15^a	8.29±0.38^b
密度 /(株·hm^-2)	2 000.00± 458.26^b	2 800.00± 511.24^a	1 500.00± 362.37^b
树高/m	13.61±3.27^b	10.40±2.81^b	16.63±4.73^a
枝下高/m	4.46±1.26^b	1.86±0.43^c	6.49±1.57^a
胸径/cm	21.68±3.51^a	24.17±8.80^a	22.25±7.11^a
郁闭度	0.63±0.05^a	0.65±0.15^a	0.65±0.15^a

特征	林分类型
特征	青海云杉纯林QY	油松纯林 YS	青海云彬-油松混交林QY＋YS
经度/（E）	106°28′	106°28′	106°28′
纬度/（N）	37°30′	37°28′	37°28′
海拔/m	2 531.5	2 331.5	2 378.3
土壤类型	灰褐土	灰褐土	灰褐土
坡向	阴	阴	阴
坡度/（°）	30.4	26.5	20.6
土壤pH	8.27±0.07^b	8.56±0.15^a	8.29±0.38^b
密度 /(株·hm^-2)	2 000.00± 458.26^b	2 800.00± 511.24^a	1 500.00± 362.37^b
树高/m	13.61±3.27^b	10.40±2.81^b	16.63±4.73^a
枝下高/m	4.46±1.26^b	1.86±0.43^c	6.49±1.57^a
胸径/cm	21.68±3.51^a	24.17±8.80^a	22.25±7.11^a
郁闭度	0.63±0.05^a	0.65±0.15^a	0.65±0.15^a

层次	林分类型	C/N	C/P	N/P
未分解层	QY	43.09±0.66^Aa	415.92±28.29^Aa	9.66±0.76^Aa
	YS	44.99±7.15^Aa	412.10±51.00^Aa	9.20±0.47^Aa
	QY＋YS	40.23±2.23^Aa	356.67±29.39^Aa	8.86±0.26^Aa
半分解层	QY	23.53±3.52^Ba	206.52±46.66^Ba	8.70±0.70^Aa
	YS	24.13±1.63^Ba	203.14±42.56^Ba	8.44±1.75^Aa
	QY＋YS	19.83±3.15^Ba	158.41±47.87^Ba	7.90±1.31^Aa

层次	林分类型	C/N	C/P	N/P
未分解层	QY	43.09±0.66^Aa	415.92±28.29^Aa	9.66±0.76^Aa
	YS	44.99±7.15^Aa	412.10±51.00^Aa	9.20±0.47^Aa
	QY＋YS	40.23±2.23^Aa	356.67±29.39^Aa	8.86±0.26^Aa
半分解层	QY	23.53±3.52^Ba	206.52±46.66^Ba	8.70±0.70^Aa
	YS	24.13±1.63^Ba	203.14±42.56^Ba	8.44±1.75^Aa
	QY＋YS	19.83±3.15^Ba	158.41±47.87^Ba	7.90±1.31^Aa

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Relationship between soil nutrient characteristics and litter quality of three typical stands in Luoshan， Ningxia， China

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