摘要
[目的]开展N、P、K、B不同营养元素配比组成的处理对17月生大花序桉(Eucalyptus cloeziana)林木生长试验,筛选林木生长效果好的试验处理。[方法]以N、P、K三大营养元素和微量元素B为试验因素,采用正交试验并建立包括CK(不施肥)在内的试验林,根据各处理施肥后林木生长量变化的分析结果,筛选最佳施肥处理。[结果]施肥后600 d左右,对林木胸径生长的影响的元素从大到小排序为P、B、K、N;而对树高、单株材积生长的影响的元素从大到小排序为P、K、N、B;施肥处理与CK间及不同施肥处理间均在林木胸径、树高、材积增长量上有极显著或显著差异,处理⑧、⑨、④、⑤的林木胸径、树高、材积生长量均分别排第1~4位;CK的林木增长量最小。综合林木增长量与施肥效率的分析结果,选择处理④为最佳施肥处理,施肥后600 d其林木胸径、树高、材积增长量比CK分别高出36.4%、11.7%、54.3%。[结论]大花序桉幼林追肥可参考的施肥处理为处理④,其有效养分总量为460.25 g/株(N 34.2%、P 26.6%、K 38.0%、B 1.2%),分2年施放,每年1次,第1次用量占42.9%,第2次占57.1%。
[Objective]The effects of nutrient elements N,P,K and B on growth of 17-months-old Eucalyptus cloeziana plantation were studied in order to select well treatment to tree growth and provide fertilization.[Method]In this study,the three essential nutrients N,P,K and trace element B were used as experimental factors.Orthogonal experimental design was used to construct experimental treatment including control(no fertilization).The optimal fertilization treatment was selected according to the growth changes before and after fertilization under all treatments.[Result]The results of the experiment showed that 600 d after fertilization,the order of elements effect on growth was P,B,K,N.The order of elements effect on tree height and volume was P,K,N,B.There were significant differences in DBH,height and volume growth between fertilization treatment and control and between different fertilization treatments.The growth of DBH,tree height and volume of treatments⑧,⑨,④and⑤were all rank 1st,2nd,3rd and 4th,respectively.The growth of control was the least.According to the analysis results of fertilizer efficiency and tree growth of each treatment,treatment④was selected as the best fertilization treatment in this experiment,which DBH,tree height and volume were 36.4%,11.7%and 54.3%higher than control,respectively.[Conclusion]Fertilization treatment④can be used as a reference to topdressing young E.cloeziana that application rates of total amount of available nutrients 460.25 g/plant(N 34.2%,P 26.6%,K 38.0%,B 1.2%),releasing in two years and once a year,and the first dose accounted for 42.9%and the second dose accounted for 57.1%.
作者
何荣
陈健波
唐庆兰
刘媛
郭东强
王建忠
陈升侃
韦振道
邓紫宇
卢翠香
张磊
HE Rong;CHEN Jian-bo;TANG Qing-lan(Nanning Arboretum,Nanning,Guangxi 530031;Guangxi Forestry Research Institute/Key Laboratory of Central South Fast-growing Timber Cultivation of National Forestry and Grassland Administration/Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Nanning,Guangxi 530002)
出处
《安徽农业科学》
CAS
2024年第15期125-128,共4页
Journal of Anhui Agricultural Sciences
基金
广西科技重大专项“桉树胶合板材种质创新及定向培育与示范”(桂科AA23062055)。
关键词
大花序桉
营养元素
正交试验
林木增长量
施肥效率
Eucalyptus cloeziana
Nutrient elements
Orthogonal experiment
Tree growth
Fertilization efficiency
