辽西半干旱区水肥耦合对刺槐生物量的影响.pdfVIP

37 5 Vol. 37 No. 5 2009 5 JOURNAL OF NORTHEAST FORESTRY UN IVERSITY M ay 2009 1) 唐凤德 张军辉 韩士杰 刘丹琪 (, , 11003 ) () () 为了探讨辽西地区刺槐 (R obin ia p seudoacac ia)水肥耦合效应, 采用 3因子 5水平正交回归设计方法, 用盆栽 验研究探讨了不同水NP条件对刺槐苗木生物量的影响结果表明: 水N 对刺槐苗木生物量的作用效 果显著, 对其具有耦合交互作用; N 对刺槐苗木生物量的作用受水分条件制约, 不同的水肥配合有不同的生物量积 累因此, 以水定肥合理施肥是提高辽西地区刺槐苗木质量的有效途径 刺槐; 水肥耦合; 生物量效应; 正交 验 S792. 41 E ffects of W ater-fertilizer Coup lin g on B iom ass of Rob in ia p seud oa ca cia in Sem i-arid A reas of W estern L iaon ing P rovin ce /Tang Fengde( College ofEnvironm ental Science, Liaon ing Un iversity, Shenyang 11003 , P. R. Ch ina); Zhang Junhu i, H an Sh ijie( Institu te ofApp lied Ecology, Ch ineseA cadem e of Sciences); Liu Danqi( L iaon ing University) / /Jour- nal ofNortheast Forestry University. - 2009, 37( 5). - 10~ 12 An expermi ent w as conducted to study the coup ling effect ofw ater, nitrogen and phosphorus on the b iom ass ofR obin ia p seudoacac ia potted seed lings by regression des ignw ith three factors and five levels, ami ing to seek the optmi um quantity of water and fertilizer. Results show ed that water and nitrogen had obvious effects on the b iom ass ofR . p seudoacac ia seed- lings, and the effect of n itrogen on seed ling b iomassw as influenced greatly by w ater. The coupling effect on the biom ass w as produced by the comb ination ofw ater and nitrogen, and d ifferen t biom assesw ere found under different cond itions of w ater and n itrogen. Therefore, fertilizing and w atering properly are effectivem ethods to mi prove the quality ofR . p seud- oacacia seedlings in western regions of Liaon ing Province. K eyw ords R obin ia p seudoacac ia; W ater-fertilizer coup ling; B iom ass effects; O rthogonal design (R obin ia p seud