水、氮、磷对杨树生物量的耦合效应  

Coupling effect of water,N and P to poplar biomass.

作　　者：王力[1] 邵明安[1] 侯庆春[1] 

机构地区：[1]中国科学院水土保持研究所,陕西杨陵712100

出　　处：《北京林业大学学报》2000年第3期19-22,共4页Journal of Beijing Forestry University

基　　金：国家"九五"科技攻关专题!"区域水土流失防治与农业持续发展中重大共性关键问题研究"(96 0 0 4 0 5 12 )的部分内容

摘　　要：根据黄土高原因水肥不协调而形成大面积低效林的问题 ,以水肥耦合为中心 ,以 1龄杨树幼苗为研究对象 ,采用三因子五水平正交旋转组合回归设计方法 ,利用盆栽试验和定量分析的手段 ,研究探讨了不同水肥条件下 ,水、N、P三因子对杨树生物量的影响 ,结果表明三因素对杨树生物量存在着耦合交互效应 ,不同的水、N、P配合有不同的生物量积累 .因此 ,合理施肥。According to the inconsistency of water and fertilizer on the Loess Plateau,coupling effect of water,N and P to poplar biomass was studied by centering on coupling of water and fertilizer,using regression design with three factors and five levels,and based on pot experiments and quantitative analysis.The results show that the coupling and alternating effects of three factors to poplar biomass exist and the different conditions of water,N and P produce the different biomass.Therefore,fertilizing properly is an effective method to improve the large area inferior forests caused by the inconsistency of water and fertilizer.

关 键 词：水肥耦合 生物量 氮 磷 黄土高原 杨树 

分 类 号：S792.110.2[农业科学—林木遗传育种]