【摘要】 对西宁市南北山主要乔木树种青海云杉、油松、青杨、白榆的年高生长量和年地径生长量进行调查,结果表明青海云杉、油松、青杨、白榆的年高生长量、年地径生长量均达到该树种的生长指标,但以青杨的长势最好,提示出这4种乔木树种均适于在西宁市南北山种植。更多还原

【Abstract】 The primary arbor including Picea crassifolia Kom,Pinus tabulaeformis Carr,Populus cathayana Rehd and Ulmus pumila L.were used to investigate the growth degree in length and the growth degree in root diameter per year in Southern mountain and Northern mountain of Xining city.The results showed that the growth degree in length and the growth degree in root diameter per year of these arbors has attained their growth indexes,but the growth indexes of Populus cathayana Rehd were the very best among these arbors,suggesting that the four arbors were suitable to grow in Southern mountain and Northern mountain of Xining city.更多还原