The Relationship between Herbaceous Biomass and Soil Factors of Sunny Slopes in the Mountains of Northern Hebei

doi:10.13466/j.cnki.lyzygl.2019.01.006

Abstract

Abstract:

In order to study the influence of soil characteristics on herbaceous vegetation layer in mountains,the correlation between herbaceous biomass,herbaceous plant diversity and soil factors in arid sunny slopes of mountainous areas in northern Hebei was studied.The results showed a clear correlation between the herbaceous biomass and herbal height(r=0.351,P<0.01,n=132);herbaceous biomass and soil thickness has a significant positive correlation(r=0.351,P<0.01,n=132)(P<0.01),herbaceous biomass and stone coverage has a clear negative correlation(r=0.297,P<0.01,n=132),but no significant correlation with soil nutrient.There was a negative correlation between species richness and soil nutrients,but it was significant only for total nitrogen,available phosphorus content.It is concluded that the soil thickness plays a great role in herbaceous biomass in arid sunny slopes of mountainous areas,and soil nutrient is not the limiting factors in herbaceous production,while high soil nutrients lead to decrease in species richness.

Key words: mountains of northern Hebei, sunny slope, biomass, soil factors, herb

CLC Number:

S750
S714

YU Shitao, FU Jinchi, JIANG Lingling, MA Rong, XU Zhongqi. The Relationship between Herbaceous Biomass and Soil Factors of Sunny Slopes in the Mountains of Northern Hebei[J]. FOREST RESOURCES WANAGEMENT, 2019, (1): 32-37.

Figures/Tables 8

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土壤养分	草本生物量/(kg/m²)
土壤养分	公式	相关性	显著性
有机质含量/(g/kg)	y=0.0038x+0.5608 R²=0.023	0.130	0.139
碱解氮含量/(mg/kg)	y=0.0023x+0.501 R²=0.0263	0.105	0.229
全氮含量/(mg/kg)	y=0.0023x+0.501 R²=0.0263	0.075	0.391
速效磷含量/(pmg/kg)	y=0.0734x+0.5833 R²=0.0211	0.051	0.565
全磷含量/(mg/kg)	y=0.6139x+0.4906 R²=0.0267	0.173^*	0.048

土壤养分	草本物种丰富度(种)
土壤养分	公式	相关性	显著性
有机质含量/(g/kg)	y=-0.0143x+13.427 R²=0.0053	-0.063	0.471
碱解氮含量/(mg/kg)	y=-0.0208x+14.806 R²=0.0333	-0.157	0.071
全氮含量/(mg/kg)	y=-12.756x+14.656 R²=0.0338	-0.215^*	0.014
速效磷含量/(mg/kg)	y=-0.8281x+14.42 R²=0.0431	-0.216^*	0.013
全磷含量/(mg/kg)	y=-3.1724x+14.018 R²=0.0115	-0.099	0.259
石块覆盖/%	y=-0.0196x+13.145 R²=0.0185	-0.136	0.120
土层厚度/cm	y=0.0157x+12.312 R²=0.0098	0.103	0.238