氮、磷配施对直干桉苗木生长和养分含量的影响  

Effects of combined application of nitrogen and phosphorus on the growth and nutrient content of Eucalyptus maidenii seedlings

作　　者：王晓丽 杨杰 吴波 曹现富 李艳 邹广权 曹子林[3] WANG Xiao-li;YANG Jie;WU Bo;CAO Xian-fu;LI Yan;ZOU Guang-quan;CAO Zi-lin(College of Forestry,Southwest Forestry University,Kunming 650224,Yunnan,China;State-owned Daguishan Forest Farm in Guangxi,Hezhou 542800,Guangxi,China;College of Ecology and Environment,Southwest Forestry University,Kunming 650224,Yunnan,China)

机构地区：[1]西南林业大学林学院,云南昆明650224 [2]广西国有大桂山林场,广西贺州542800 [3]西南林业大学生态与环境学院,云南昆明650224

出　　处：《云南大学学报（自然科学版）》2022年第1期171-178,共8页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家重点研发计划(2016YFD0600501)。

摘　　要：以540株5个月生直干桉实生苗为试材,采用氮、磷两因素三水平3×3回归正交设计开展施肥调控试验,通过测定苗木生长形态指标、生物量和各器官养分含量,分析施肥对苗木生长和生物量累积的影响及其养分生理基础,探讨利于苗木生长的最佳施肥量,指导壮苗培育中的养分管理调控.研究结果表明,利于苗高和地径生长的最佳试验组合均为处理组合5(氮肥0.55 g/株、磷肥0.60 g/株配施).氮肥对苗高生长和总生物量累积的促进作用好于磷肥,磷肥对地径生长的促进作用好于氮肥.苗高、地径生长和总生物量累积均随氮、磷配施施肥量的增加呈先增大后减小的趋势,氮、磷配施对苗高、地径生长和总生物量累积的促进效果皆好于单施氮肥及单施磷肥,苗木生长的理论最佳施肥量为氮肥0.60 g/株、磷肥0.66 g/株配施.氮肥、磷肥施用量分别对苗木各器官的全N、全P质量比有显著影响,但氮、磷配施对苗木各器官全N、全P累积的促进作用皆不显著.Five hundred and forty five-month-old seedlings of Eucalyptus maidenii were employed to elucidate the mechanism of fertilization regulation via the regression-orthogonal experimental design of two factors(i.e., N and P) and three levels. The effects of fertilization on the growth, biomass accumulation, and nutrient physiology of the seedlings were analyzed. The optimal amount of fertilizer(i.e., N and P) for the seedlings was stated. The results showed that the optimal experimental treatment for the growth of seedling height and ground diameter was the fifth experimental treatment(N fertilizer 0.55 g/plant and P fertilizer 0.60 g/plant). The promotion effects of N fertilizer on the growth of seedling height and the accumulation of total biomass were better than that of P fertilizer, and the promotion effect of P fertilizer on the growth of ground diameter was better than that of N fertilizer. The growth of seedling height and ground diameter, the accumulation of total biomass all first increased and then decreases with the higher content of N and P fertilizer in the seedling substrate. The promotion effects of N and P fertilizer combination on the growth of seedling height, ground diameter and the accumulation of total biomass were better than that of N or P fertilizer being applied respectively. The optimal theoretical amount of N and P fertilizer being combination for the growth of E. maidenii seedlings was N fertilizer 0.60 g/plant and P fertilizer 0.66 g/plant. Applying N fertilizer and P fertilizer respectively had a significant promotion influence on the total N and P content of each organ(roots, stems, and leaves) of the seedling,however, applying combination of N fertilizer and P fertilizer had no significant promoting effect.

关 键 词：直干桉 氮磷配施 肥料效应 生长效应 养分含量 

分 类 号：S723.7[农业科学—林木遗传育种]