叶面肥对油茶幼苗生长及养分吸收的影响  

Effect of different foliar fertilizer ratios on the growth and nutrient absorption of camellia seedling

作　　者：何应会[1] 曹继钊[1] 唐健[1] 覃其云[1] 宋贤冲[1] 农必昌[1] 

机构地区：[1]广西林业科学研究院/国家林业局中南速生材繁育实验室/广西优良用材林资源培育重点实验室,南宁530002

出　　处：《南方农业学报》2012年第12期1997-2000,共4页Journal of Southern Agriculture

基　　金："十一五"广西林业科技项目(桂林科字[2010]第2号);广西科学研究与技术开发计划项目(桂科攻1123004-2B)

摘　　要：【目的】研究不同配比叶面肥对油茶幼苗生长及养分吸收的影响,为研制油茶优质苗木专用叶面肥提供参考。【方法】以油茶营养杯嫁接苗为研究对象,采用正交试验,以不同NPK配比和喷施浓度设9个叶面肥处理以及清水对照处理,于油茶幼苗期进行叶面喷施,测定幼苗各项生长指标及根茎叶各部分营养元素含量。【结果】对油茶幼苗生长促进效果最好的叶面肥的NPK配比为11-13-4,喷施浓度为2.0%的处理。喷施叶面肥后,根茎叶各部分N、P、K养分含量均有所提高,油茶苗期对养分的需求规律表现为N>K>P,通过喷施叶面肥能有效满足油茶幼苗对微量元素的需求。【结论】适宜NPK配比和喷施浓度的叶面肥对油茶幼苗生长有良好的促进作用,并能提高植株对营养元素的吸收利用效率。[Objective]This research studied the effects of different fertilizer proportions on camellia seedling growth and nutrient absorption in order to provide reference for the development of special camellia seedlings foliar fertilizer. [Method]Using nutritional-cup grafted camellia seedlings as research subject, under orthogonal test, 9 different foliar fer- tilizer concentration treatments with various NPK ratios application and the water control treatment were spayed onto camellia leaves during the seedling stage to determine the seedling growth indexes and the nutrient element contents in camellia roots, stems, and leaves. [Result]The best NPK fertilizer ratio for the promotional growth of camellia seed]ings was 11-13-4, and the optimal treatment spaying concentration was at 2%, which reached significant difference compared with other treatments. After foliage fertilizer application, the N, P, and K nutrition contents in stems and leaves greatly improved; the nutrient requirements of camellia seedlings were arranged in the order of N〉K〉P. By spraying foliar fertili- zer, the requirements for trace elements were effectively complemented in camellia seedlings. [Conclusion]Suitable NPK composition and foliar fertilizer spraying concentrations could promote the growth of camellia seedlings and enhance plant nutrient absorption and usage efficiency.

关 键 词：油茶 叶面肥 NPK配比 喷施浓度 生长指标 营养吸收 

分 类 号：S145.2[农业科学—肥料学]