大兴安岭呼玛河流域多年冻土区森林土壤有机碳和有效氮分布特征及影响因素
郑智超, 满浩然, 臧淑英, 刘超, 董星丰

Distribution characteristics and influencing factors of forest soil organic carbon and available nitrogen in permafrost regions of Huma River basin, Greater Hinggan Mountains
Zhichao ZHENG, Haoran MAN, Shuying ZANG, Chao LIU, Xingfeng DONG
图2 土壤有机碳、有效氮与环境因子间的Person相关性分析[红色表示相关性为正相关,蓝色表示相关性为负相关;*表示通过显著性检验(P<0.05),颜色深浅和圆圈大小反映相关系数的大小;缩写词包括土壤深度(SD)、海拔(EL)、年均气温(MAT)、年均降水量(MAP)、冻土区类型(PT)、植被类型(VT)、土壤有机碳(SOC)、铵态氮(NH4+-N)、硝态氮(NO3--N)和土壤酸碱度(pH)]
Fig. 2 Person correlation analysis between soil organic carbon, available nitrogen and environmental factors [Red represents a positive correlation, and blue represents a negative correlation;* represents passing the significance test (P<0.05); color depth and circle size reflect the correlation coefficient; abbreviations include soil depth (SD), elevation (EL), mean annual temperature (MAT), mean annual precipitation (MAP), permafrost zone type (PT), vegetation type (VT), soil organic carbon (SOC), ammonium nitrogen (NH4+-N), nitrate nitrogen (NO3--N), soil acidity or alkalinity (pH)]