文献类型：期刊文献

中文题名：腾冲红花油茶营养器官主要矿质元素含量年内变化分析

英文题名：Analysis on Annual Changes of Mineral Elements Content in Vegetative Organs of Camellia reticulata Tree

作者：谢胤[1] 曹永庆[2] 余祖华[1] 尹必期[3] 王自洪[3] 徐志映[1] 寸明辉[1] 任华东[2]

第一作者：谢胤

机构：[1]国家油茶科学中心腾冲红花油茶实验站,云南腾冲679100;[2]中国林科院亚热带林业研究所,浙江富阳311400;[3]腾冲市林业局林业技术推广站,云南腾冲679100

年份：2019

卷号：0

期号：3

起止页码：97-103

中文期刊名：西部林业科学

外文期刊名：Journal of West China Forestry Science

收录：CSTPCD;;北大核心:【北大核心2017】；

基金：中国林院亚林所中央级公益性科研院所基本科研业务费专项资金“腾冲红花油茶高效栽培水肥调控技术研究(CAFYBB2017MB006)”

语种：中文

中文关键词：腾冲红花油茶;营养器官;氮;磷;钾;镁

外文关键词：Camellia reticulata;vegetative organ;Nitrogen;Phosphorus;Potassium;Magnesium

分类号：S794.4

摘要：以腾冲红花油茶实生40a纯林为对象,研究腾冲红花油茶叶片、枝干和根系中的氮、磷、钾、镁元素含量的年内变化规律。结果表明,腾冲红花油茶营养器官的氮、磷、钾、镁元素含量比例约为9︰1︰4︰1,各元素在叶片中的含量较高,根系中的含量较低。此外,各营养器官的氮、磷、钾、镁元素含量的年内变化规律不同,叶片和枝干中氮、磷、钾、镁元素含量总体上表现出'下降-上升-下降'的变化趋势,而根系中的氮、磷、镁元素含量则表现出'上升-下降-上升'的变化趋势。从1月份至3、4月份,叶片和枝干中氮、磷、钾、镁元素的含量逐渐下降,5月份各元素的含量显著升高。与叶片和枝干不同,根系中磷和镁元素在1-4月表现出明显上升趋势,而氮和钾元素含量变化不明显,5-8月,各元素表现出下降趋势。由此可知,腾冲红花油茶冬季施肥应注重磷、镁元素的施用,4月份春季追施复合肥,氮、磷、钾元素比例宜控制在9︰1︰4。
The 40-year-old bearing trees of Camellia reticulata were selected to study the annual changes of nitrogen(N),phosphorus(P),potassium(K)and magnesium(Mg)content in leaves,branches and roots.The results showed that the ratio of N,P,K and Mg contents in organs of Camellia reticulata was 9︰1︰4︰1 and the element content was higher in leaves and relatively lower in roots.In addition,the annual changes pattern of the mineral elements content were different in different organs.The annual changes of N,P,K and Mg contents showed a‘decline-rise-decline’trend in leaves and branches,while a‘rise-decline-rise’trend was found in roots.The N,P,K and Mg contents in leaves and branches decreased gradually from January to March or April and increased significantly in May.Differently from leaves and branches,the P and Mg content in roots increased while no obviously changes of N and K were found from January to April.Then the N,P,K and Mg contents in roots showed a decline trend from May to August.To sum up,we need to pay attention to P and Mg fertilization in winter and the appropriate ratio for N,P and K topdressing of Camellia reticulata was 9︰1︰4 in April.