闽楠幼林生长与叶片营养元素季节动态特征  

Seasonal dynamics of growth and leaf nutrients of young Phoebe bournei plantation

作　　者：王湘媛 邢元军[2] 杨丽丽[1] 申玉宇 李超凡 许冰冰 WANG Xiangyuan;XING Yuanjun;YANG Lili;SHEN Yuyu;LI Chaofan;XU Bingbing(College of Forestry,Central South University of Forestry and Technology,Changsha 410018,China;Central South Forest Inventory and Planning Institute of State Forestry Administration,Changsha410014,China)

机构地区：[1]中南林业科技大学林学院,湖南长沙410018 [2]国家林业局中南林业调查规划设计院,湖南长沙410014

出　　处：《湖南林业科技》2018年第3期21-26,共6页Hunan Forestry Science & Technology

基　　金：2016年湖南省大学生研究性学习和创新性实验计划项目:湖南酸雨区闽楠与其他主要树种人工幼林生长的比较

摘　　要：为了解闽楠人工幼林生长状况及叶片N、P、K、Ca、Mg含量的季节变化特征,在湖南攸县黄丰桥林场,选取了五块3年生闽楠幼林样地进行了研究。结果表明:闽楠幼林苗高年度增加值为60.8 cm,地径年度增加值为7.35 mm,均表现为7-9月增长量最大。闽楠叶片各月N含量范围为16.84~19.54 g·kg^(-1)、P含量范围为1.28~1.49 g·kg^(-1)、K含量范围为2.56~5.47 g·kg^(-1)、Ca含量范围为7.94~9.92 g·kg^(-1)、Mg含量范围为0.82~1.05 g·kg^(-1),其中N、P、K元素含量均表现为春季最高,冬季最低。各元素含量年均值排序为N(18.13 g·kg^(-1))>Ca(8.90 g·kg^(-1))>K(4.36 g·kg^(-1))>P(1.40 g·kg^(-1))>Mg(0.96 g·kg^(-1))。季节变异特征分析结果显示,不同元素平均变异系数排序为K(30.67%)>P(13.44%)>Mg(9.87%)>Ca(9.33%)>N(5.89%),说明N、Ca、Mg元素含量的季节变异较小,而K元素的季节变异较大。In order to understand the growth status of Phoebe bournei and seasonal variations of nitrogen,phosphorus,potassium,calcium,magnesium contents in leaves, we selected five 3-year-old young Phoebe bournei stands for study in Huangfengqiao Forest Farm of You County in Hunan Province. The results showed that the annual increase of height of young Phoebe bournei seedlings was 60. 8 cm and the annual increment of ground diameter was 7. 35 mm,both of which showed the largest increase in July to September. The element content in leaves was 16. 84 - 19. 54 g · kg^-1 in nitrogen,1. 28 - 1. 49 g · kg^-1 in phosphorus,2. 56 - 5. 47 g · kg^-1 in potassium,7. 94 - 9. 92 g·kg^-1 in calcium,0. 82 - 1. 05 g·kg^-1 in magnesium,in which nitrogen,phosphorus and potassium were all the highest in spring and the lowest in winter. The annual average of each element ranked as nitrogen（ 18. 13 g·kg^-1） 〉calcium（ 8. 90 g · kg^-1） potassium（ 4. 36 g · kg^-1）〉 phosphorus（ 1. 40 g·kg^-1） magnesium〉（ 0. 96 g·kg^-1）. The results of seasonal variations showed that the average coefficient ofvariation of different elements ranked as potassium（ 30. 67%） 〉phosphorus（ 13. 44%） 〉magnesium（ 9. 87%） 〉calcium（ 9. 33%）〉 nitrogen（ 5. 89%）, which indicated that the seasonal variation of the content of nitrogen,calcium,magnesium is smaller,while the seasonal variation of potassium element is larger.

关 键 词：闽楠 季节变化 叶片 营养元素 

分 类 号：S792.24[农业科学—林木遗传育种]