青海湖北岸退化与封育草地土壤与优势植物中四种微量元素特征

草业学报 ›› 2012, Vol. 21 ›› Issue (5): 213-221.

青海湖北岸退化与封育草地土壤与优势植物中四种微量元素特征

李天才^1,2,曹广民²,柳青海²,周国英²,师生波²,张德罡^1*

1.甘肃农业大学草业学院,甘肃兰州 730070;
2.中国科学院西北高原生物研究所,青海西宁 810008

收稿日期:2011-10-31 出版日期:2012-05-25 发布日期:2012-10-20
通讯作者: E-mail:zhangdg@gasu.edu.cn
作者简介:李天才(1966-),男,青海乐都人,副研究员。E-mail:tcli@nwipb.ac.cn
基金资助:
国家科技支撑计划项目(2007BAC30B04)资助。

Characteristic of four trace elements in soil and dominant plants form degraded grassland, enclosed grassland on the north bank of Qinghai Lake

LI Tian-cai^1,2, CAO Guang-min², LIU Qing-hai², ZHOU Guo-ying², SHI Sheng-bo², ZHANG De-gang¹

1.College of Pratacultural Science, Gansu Agricultural University, Lanzhou 730070, China;
2.Northwest Institute of Plateau Biology, Chinese Academy of Science, Xining 810008, China

Received:2011-10-31 Online:2012-05-25 Published:2012-10-20

摘要/Abstract

摘要： 为了研究退化、封育草地中植物形态与铜、锌、铁、锰等微量元素特征,选择青海湖北岸退化草地为试验样地,以围栏封育草地为对照,通过各类型草地样方调查以及典型植物中铜、锌、铁、锰等微量元素的对比分析,结果表明,退化草地较封育草地植物中铜、锌、铁、锰等微量元素的含量高,且与植物株高、盖度和地上生物量之间具有负相关关系。如:烂泥湾退化草地、封育草地植被中Cu分别为10.480和7.275 mg/kg,而土壤中Cu分别为13.99 和24.19 mg/kg,植物株高则为13.3和17.3 cm;退化草地中植物株高与Cu、Zn之间相关系数为-0.987 3和-0.986 6。退化草地植物中微量元素营养含量的蓄积性既是草地退化的结果,又是退化草地再退化的原因之一,也是其对外界环境变化的一种“应急”响应。

Abstract: In order to study on the relationship between plant shapes and copper, zinc, iron, manganese and other trace elements, so we selected degraded grassland on the north bank of Qinghai Lake as our test sample and fence enclosure as control, through investigated of the types of grass plots and analyzed copper, zinc, iron, manganese and other trace elements in typical plants. The results showed that the contents of copper, zinc, iron, manganese and other trace elements have an accumulation of the plants on degraded grassland compared with that on enclosed grassland, and have a negative correlation between plant shapes-height and ground with biomass. Such as: in Lanniwan, Cu were 10.480 and 7.275 mg/kg in plant form degraded grassland and enclosed grassland, but in soil Cu were 13.99 and 24.19 mg/kg, plant height was 13.3 and 17.3 cm, respectively. In degraded grassland, the correlation coefficient between the plant height and Cu, Zn was -0.987 3 and -0.986 6, respectively. Trace elements nutrient-accumulation in plant form degraded grassland is the result of degraded and also one of the cause grassland accelerated degradation. It is also an “emergency” response for mineral elements nutrition needs change.

中图分类号:

李天才,曹广民,柳青海,周国英,师生波,张德罡. 青海湖北岸退化与封育草地土壤与优势植物中四种微量元素特征[J]. 草业学报, 2012, 21(5): 213-221.

LI Tian-cai, CAO Guang-min, LIU Qing-hai, ZHOU Guo-ying, SHI Sheng-bo, ZHANG De-gang. Characteristic of four trace elements in soil and dominant plants form degraded grassland, enclosed grassland on the north bank of Qinghai Lake[J]. Acta Prataculturae Sinica, 2012, 21(5): 213-221.

参考文献

[1] 王一博, 王根绪, 沈永平, 等. 青藏高原高寒区草地生态环境系统退化研究[J]. 冰川冻土, 2005, 27(5): 633-640.
[2] 沈景林, 谭刚, 乔海龙, 等. 草地改良对高寒退化草地植被影响的研究[J]. 中国草地, 2000, 10(5): 49-54
[3] Akiyama T, Kawamura K. Grassland degradation in China: Methods of monitoring, management and restoration[J]. Grassland Science, 2007, 53(1): 1-17.
[4] Harris R B. Rangeland degradation on the Qinghai-Tibetan plateau: A review of the evidence of its magnitude and causes[J]. Journal of Arid Environments, 2010, 74(1): 1-12.
[5] 单贵莲, 徐柱, 宁发, 等. 围封年限对典型草原群落结构及物种多样性的影响[J]. 草业学报, 2008, 17(6): 1-8.
[6] 孙菁, 彭敏, 陈桂琛, 等. 青海湖区针茅草原植物群落特征及群落多样性研究[J]. 西北植物学报, 2003, 23(11): 1963-1968.
[7] 周国英, 陈桂琛, 韩友吉, 等. 围栏封育对青海湖地区芨芨草草原群落特征的影响[J]. 中国草地学报, 2007, 29(1): 19-23.
[8] 安耕, 王天河. 围栏封育改良荒漠化草地的效果[J]. 草业科学, 2011, 28(5): 874-876.
[9] Allison S K. You can’t not choose: embracing the role of choice in ecological restoration[J]. Restoration Ecology, 2007, 15: 601-605.
[10] 武高林, 杜国祯. 青藏高原退化高寒草地生态系统恢复和可持续发展探讨[J]. 自然杂志, 2007, 29(3): 159-164.
[11] 王堃. 草地植被恢复与重建[M]. 北京: 化学工业出版社(环境科学与工程出版中心), 2004: 19-29.
[12] Barceló J, Poschenrieder C. Hyper accumulation of trace elements: from uptake and tolerance mechanisms to litter decomposition: selenium as an example[J]. Plant and Soil, 2011, 341: 31-35.
[13] 廖红, 严小龙. 高级植物营养学[M]. 北京: 科学出版社, 2003: 149-187.
[14] 李天才, 陈桂琛, 曹广民, 等. 青海湖北岸退化草地和封育草地中钾、钙、镁等矿质常量元素特征[J]. 草地学报, 2011, 19(5): 752-759
[15] 匡艺, 李廷轩, 余海英. 小黑麦植株铁、锰、铜、锌含量对氮素反应的品种差异及其类型[J]. 草业学报, 2011, 20(4): 82-89.
[16] 李迪强, 郭泺, 朵海瑞, 等. 青海湖流域土地覆盖时空变化与生态保护对策[J]. 中央民族大学学报(自然科学版), 2009, 18(1): 18-22.
[17] 陈桂琛, 陈孝全, 苟新京. 青海湖流域生态环境保护与修复[M]. 西宁: 青海人民出版社, 2008: 76-87.
[18] 李金花, 李镇清, 任继周. 放牧对草原植物的影响[J]. 草业学报, 2002, 11(1): 4-11.
[19] Mclendon T, Teclente E F. Nitrogen and phosphorus effects on secondary succession dynamics on a semi-arid sagebrush site[J]. Ecology, 1991, 72 (6): 2016-2024.
[20] 王长庭, 龙瑞军, 王启兰, 等. 放牧扰动下高寒草甸植物多样性、生产力对土壤养分条件变化的响应[J]. 生态学报, 2008, 28(9): 4144-4152.
[21] 黄德青, 于兰, 张耀生, 等. 祁连山北坡天然草地地下生物量及其与环境因子的关系[J]. 草业学报, 2011, 20(5): 1-10.
[22] 黄德青, 于兰, 张耀生, 等. 祁连山北坡天然草地地上生物量及其与土壤水分关系的比较研究[J]. 草业学报, 2011, 20(3): 20-27.
[23] 韩立辉, 尚占环, 任国华, 等. 青藏高原“黑土滩”退化草地植物和土壤对秃斑面积变化的响应[J]. 草业学报, 2011, 20(1): 1-6.
[24] 朱宝文, 周华坤, 徐有绪, 等. 青海湖北岸草甸草原牧草生物量季节动态研究[J]. 草业科学, 2008, 25(12): 62-66.