青藏高原不同气候区高寒沙地两种优势植物及其根际土壤的养分特征

苟小林,周青平,陈有军,魏小星,涂卫国

Characteristics of nutrients in two dominant plant species and rhizospheric soils in alpine desert of the Qinghai-Xizang Plateau under contrasting climates

Xiao-Lin GOU,Qing-Ping ZHOU,You-Jun CHEN,Xiao-Xing WEI,Wei-Guo TU

表3 气候条件下植物器官及根际土壤的养分比的相关系数

Table 3 Pearson’s correlations of nutrient ratios between plant tissues and rhizospheric soils under two climatic conditions

植物 Plant	土层 Soil layer (cm)	养分比 Nutrient ratio	枝叶 Branches and leaves			根 Roots
植物 Plant	土层 Soil layer (cm)	养分比 Nutrient ratio	C:N	C:P	N:P	C:N	C:P	N:P
沙蒿 Artemisia desertorum	0-10	SC:SN	0.397^ns	0.332^ns	-0.505^ns	0.422^ns	0.336^ns	-0.482^ns
		SC:SP	0.826^*	0.758^ns	-0.901^*	0.833^*	0.807^ns	-0.842^*
		SN:SP	0.864^*	0.814^*	-0.902^*	0.86^*	0.87^*	-0.843^*
	10-20	SC:SN	-0.218^ns	-0.29^ns	0.114^ns	-0.22^ns	-0.261^ns	0.189^ns
		SC:SP	0.884^*	0.869^*	-0.865^*	0.866^*	0.89^*	-0.843^*
		SN:SP	0.923^**	0.937^*	-0.865^*	0.906^*	0.94^**	-0.873^*
中国沙棘 Hippophae rhamnoides subsp. sinensis	0-10	SC:SN	-0.983^***	-0.358^ns	0.919^*	-0.983^***	-0.85^*	0.015^ns
		SC:SP	-0.993^***	-0.35^ns	0.938^**	-0.981^**	-0.815^*	0.076^ns
		SN:SP	-0.991^***	-0.369^ns	0.933^**	-0.959^**	-0.738^ns	0.183^ns
	10-20	SC:SN	-0.892^*	-0.152^ns	0.895^*	-0.907^*	-0.862^*	-0.118^ns
		SC:SP	-0.8^ns	-0.359^ns	0.709^ns	-0.843^*	-0.909^*	-0.316^ns
		SN:SP	-0.689^ns	-0.373^ns	0.583^ns	-0.731^ns	-0.843^*	-0.374^ns