文献类型：期刊文献

中文题名：油茶树体对氮磷钾元素年吸收和积累规律的研究

英文题名：Research on Annual Changes of Nitrogen,Phosphorous,Potassium Absorption and Accumulation in Oil-tea Camellia Tree

作者：曹永庆[1] 任华东[1] 林萍[1] 王开良[1] 姚小华[1] 龙伟[1] 汪开兴[2]

第一作者：曹永庆

机构：[1]中国林业科学研究院亚热带林业研究所;[2]浙江省金华市婺城区白龙桥镇人民政府

年份：2012

卷号：25

期号：4

起止页码：442-448

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：浙江省科技计划项目"油茶良种快繁及产业提升关键技术集成示范及推广"(2010C02005);浙江省省院合作林业科技项目"江山林改科技支撑技术集成与示范"(2010SY01);国家"十一五"林业科技支撑计划项目"油茶可持续丰产栽培关键技术研究"(2009BADB1B02)

语种：中文

中文关键词：油茶;氮;磷;钾;累积量

外文关键词：Camellia oleifera ; nitrogen; phosphorous ; potassium ; accumulation

分类号：S794.4

摘要：以5年生油茶为试材,研究了树体对大量矿质元素氮、磷、钾元素的年吸收和积累规律。结果表明:油茶年发育周期中对氮、磷、钾元素的吸收量分别为44.05、5.50、23.31 g.株-1,吸收比例约为8∶1∶4。抽梢期(4月)至果实发育期(7月)是油茶吸收氮、钾元素的活跃时期,该段时期内的积累量超过了年积累量的50.00%,其中的氮、钾元素分别有43.64%和26.97%被根系所利用;植株对磷元素的积累量在4月至10月没有明显的起伏,从果实发育期(7月)至成熟期(10月)这段时间内,植株磷元素的积累量达到2.63 g,其中35.36%保留在根系中。油茶叶片、枝干和根系中氮、磷、钾元素含量高低顺序为氮>钾>磷,成熟果实中为钾>氮>磷;在新梢期(4月),根系中的磷、钾元素向叶片和新梢进行了部分转运,而在果实膨大、成熟期,钾元素从枝干和叶片转运至果实中。
Five-year-old oil-tea camellia trees were selected to study the annual changes of nitrogen, phosphorous, potassium absorption and accumulation. The results showed that the annual accumulation of nitrogen, phosphorous and potassium achieved 44.05, 5.50 and 23.31 g per tree, respectively. And the ratio was approximately 8： 1：4. The active absorption and accumulation period of nitrogen and potassium was from shooting in April to fruit development in July during which over 50.00% nitrogen and potassium of annual uptake was accumulated, in which 43.64% nitrogen and 26.97% potassium were used by the roots. The accumulation of phosphorous was stable from April to October and achieved 2.63 g per tree in which 35.36% was used by the roots during fruit ripening period. The content of major mineral elements in leaves, stems and roots of oil-tea camellia was N 〉 K 〉 P and K 〉 N 〉 P in ripening fruits. The phosphorous and potassium in roots partly transferred to leaves and new shoot during shooting period in April and the potassium in stems and leaves transferred to fruits during fruit ripening period.