摘要
对赣东北景德镇市枫树山林区主要林分下的土壤、植物及枯落物中的Ｂ，Ｍｏ，Ｃｕ，Ｚｎ，Ｆｅ和Ｍｎ六种微量元素的状况进行了研究。结果表明：该地区森林土壤中有效Ｂ，Ｍｏ，Ｃｕ和Ｚｎ含量很低，有效Ｆｅ与Ｍｎ含量丰富，绝大部分供试土壤Ｆｅ与Ｍｎ比例失调，表现为有效Ｍｎ含量过高。有效微量元素含量在土层中的分布大致是：Ｂ与Ｍｎ由表层往下含量逐渐增加，Ｍｏ与Ｆｅ无规律性，Ｃｕ与Ｚｎ表层高于下层。影响该地区有效微量元素含量的主要土壤因子是土壤质地、ｐＨ（ＫＣｌ）、有机质、全Ｎ、速效Ｐ、速效Ｋ等。不同树种对微量元素的吸收有选择性，杉木是富集Ｍｎ的树种。阔叶林枯落物各元素含量均较高或最高，但枯落物层现存贮量最低；杉木林枯落物各元素含量中等，火炬松除个别元素外一般均较低，马尾松为最低，但枯落物层现存贮量最高。
This paper dealt with the status of microelements(including B,Mo,Cu,Zn,Fe,Mn) in the forest soil ecosystems in northeast part of Jiangxi Province.Results revealed that the available contents of B,Mo,Cu,Zn were very low and those of Fe and Mn were very rich.Fe/Mn ratio in most of the soils was in disorder.The availale contents of B and Mn in the surface soils were lower than those in their subsoils,which was contrary to the relevant reports from agricultural scientists. The contents of Cu and Zn in the surface soils were higher than shose in their subsoils. Mo and Fe showed no distribution regularity. The factors affecting available contents of microelements in soils were soil texture, pH values,organic matters,total N, available P and available K. The absorbtion ability of different trees varied.Chinese fir was proved to enrich Mn.Contents of microelements in forest floors were rich.Contents of microelements in broadleaved forest floors were higher than those in Chinese fir floors,the latter higher than those from Loblolly pine,and those from Masson pine were the lowest.
出处
《江西科学》
1998年第2期97-103,共7页
Jiangxi Science
基金
国家自然科学基金
关键词
森林土壤
微量元素
临界值
生态系统
Northeastern Jiangxi,Forest soils,Microelements,Critical level
