摘要
以大兴安岭地区3种主要立地类型的笃斯越橘为试验材料,通过分析由灌丛基部萌生的1~2年生(S1)、3年生(S2)、4年生(S3)、5年生(S4)、趋于衰老的多年生(S5)枝条叶片和茎部,以及衰老枝条(S6)的N、P、K、Ca、Mg、Mn含量分布规律及其与新梢生长的关系,明确矿质元素在笃斯越橘不同年龄基生枝上叶片及茎部的分布特性,探索矿质营养与笃斯越橘树体生长发育及衰老更新的关系。结果表明:(1)6种元素在不同年龄枝条分布呈现不同的规律,其中,N、P、K随基生枝条年龄增加大致呈下降趋势,叶片和茎部分别在S5、S6时期降到最小值;Ca在衰老枝条上含量最高,Mg元素在S1时期叶片上分布较高;Mn在不同年龄基生枝中波动较小,水湿地、山地类型叶片Mn元素随枝龄增加而提高,茎部则先增后减,在S5时期分布最高;N、P、K、Ca、Mg含量表现为叶片明显高于茎部,而塔头草甸类型茎部Mn略高于叶片,且茎部Mn含量高达2 000mg·kg^(-1)。(2)笃斯越橘的新梢生长量与叶片K、Mg以及茎部N、K、Mg含量呈极显著正相关关系,与叶片Ca、Mn以及茎部Ca含量呈显著或极显著负相关关系。(3)典型相关分析结果显示,影响笃斯越橘新梢生长量的矿质元素因子因基生枝条年龄而异;S1时期主要与叶片Mg含量有关,S2~S4阶段受茎部K、Ca、Mg影响最大,S5时期主要受叶片Ca含量影响。(4)笃斯越橘的衰老可能与Ca积累有关。
This paper was carried out to clear the distribution of mineral nutrition in leaves and stems of Vaccinium uliginosum among different ages of basal branches in Daxing’an Mountains and explore the relations between mineral nutrition and the growth in V.uliginosum,we analyzed the contents of N,P,K,Ca,Mg,Mn among different ages of basal branches including12year branches(S1),3year branches(S2),4year branches(S3),5year branches(S4),approaching old branches(S5)and old branches(S6)conceived from the base of bushwood.The results indicated that:(1)six elements showed different patterns in leaves and stems.N,P,K had a tendency to decrease as branches became old,leaves and stems sunk the minimum at S5,S6,respectively.The content of Ca was accumulated at old branches,Mg and Mn both had no significant differences among different branches;the contents of N,P,K,Ca,Mg showed the following tendency:leaves were obviously higher than stems,Mn content of stems was slightly higher than that of leaves in wet land with grass.(2)The new shoot growth of V.uliginosum had positive correlation with K and Mg in leaves and N,K,Mg in stems,and had negative correlation with Ca and Mn in leaves and Ca in stems.(3)Canonical correlation analysis showed that the factors of mineral nutrition which effected new shoot growth were differ from the ages of basal branches;in S1,the new shoot was mainly related to Mg in leaves,the new shoot was effected by K,Ca and Mg in stems during S2-S4,and the content of Ca in leaves mainly influenced the growth of new shoot.(4)The senescence of V.uliginosum may be related to the accumulation of Ca.
作者
陈露
白永超
侯智霞
李彬彬
宫中志
盖占江
包彬
Chen Lu;Bai Yongchao;Hou Zhixia;Li Binbin;Gong Zhongzhi;Gai Zhanjiang;Bao Bin(Beijing Forestry University, Key Laboratory for Silviculture and Conservation Attached to China Ministry of Education, Research and Development Center of Blueberry, Beijing 100083, China;Oroqen Forestry Adminsitration, Oroqen, Inner Mongolia 022450, China;Hulun Beier Forestry Science Research Institute, Hulun Bair, Inner Mongolia 021008, China)
出处
《西北植物学报》
CAS
CSCD
北大核心
2017年第10期2042-2051,共10页
Acta Botanica Boreali-Occidentalia Sinica
基金
北京林业大学科技计划(2015-01)
关键词
笃斯越橘
基生枝年龄
矿质营养
新梢生长
Vaccinium uliginosum
the age of basal branches
mineral nutrition
new shoot growth
