摘要
研究祁连山大野口流域不同坡向植物群落(优势种)叶片的化学计量特征及其与土壤因子的关系.结果表明:北坡的w(N)、w(P)显著高于南坡和西北坡,而w(N):w(P)显著低于南坡;不同坡向植物营养限制类型发生变化,南坡植物生长受P限制,北坡植物生长受N限制;叶片w(N)与w(P)、w(N):w(P)呈显著正相关关系;叶片w(P)与土壤温度呈显著负相关关系,土壤水分、温度、pH、w(有机碳)、w(N)共同影响w(N):w(P),其中土壤温度是主导因素.
Ecological stoichioetry of the leaf of the dominated species and the correlations between eco- logical stoichioetry and soil properties in different slope aspect in Dayekou Basin of Qilian Mountains is studied. The results showed that leaf w（N）, w（P） on north-facing slope was significantly higher than that on south-facing slope and northwest-facing slope, but w（N） ： w（P） was significantly lower than south- facing slope. The nutrition limit types of plant growth was different on different slope aspects, with phos- phorus limitation on south aspect, and nitrogen limitation on north aspect. Leaf w（N） were significantly positively correlated to w（P） and w（N） ： w（P）; leaf w（P） were significantly natively correlated to soil tem- perature, soil water content, temperature, pH, w（organic carbon）, w（N） were influenced w（N） ： w（P）, but soil temperature was the most important factor.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2017年第3期362-367,共6页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(31370466
31270482)
中央高校基本科研业务费专项资金项目(13LZUJBWZD011)
关键词
营养限制
土壤因子
优势种叶片
坡向
limitation nutrient
soil factor
dominated specie
slope facing
