首 页 网络介绍 CERN新闻 规章制度 在研项目 论文与出版物 学术动态 生态知识 人员招聘 人员组成 English

    论文与出版物
   SCI论文目录
   SCI论文全文(PDF文件)
   核心期刊论文目录
   出版物目录
   研究报告目录

 SCI论文目录
Distribution and Seasonal Dynamics of Roots in a Revegetated Stand of Artemisia ordosica Kracsh. in the Tengger Desert (North China)
------------------------------------------------------------------------------------------
出 版 社:Arid Land Research and Management  
发表时间:2008, 22: 195 -211  
台  站: 沙坡头沙漠试验研究站  
作  者:张志山  
点 击 率:318689
------------------------------------------------------------------------------------------
关 键 字:minirhizotrons, psammophytic shrub, soil corer, soil water content,  
摘  要:In revegetated desert areas, roots are critical for plant growth and community stability. A field study was conducted to investigate the distribution and dynamics of roots in a revegetated stand of Artemisia ordosica Kracsh. in the Tengger Desert during the growing seasons of 2004 and 2005. Seven trenches 1.2m wide and 1.0m deep were excavated around stems to determine the coarse root length and weight. Soil cores, spaced from the stem at an interval of 0.2, 0.4, 0.6, 0.8, and 1.0 m, were designed to take fine root samples, and minirhizotrons were buried at intervals of 0.2, 0.5, and 1.0m away from the stem to measure the fine root number and length. The results showed that the root systems of A. ordosica is distributed vertically in the uppermost soil profile, especially for coarse roots, which were concentrated in the 0.2-m soil profile. The horizontal distribution of A. ordosica coarse roots was limited to a range of 0.6m and 0.4m away from the trunk for root length and weight, respectively. Fine roots were distributed uniformly in comparison with coarse roots. The total root biomass and fine root biomass were 0.42 and 0.26 kgm2, which accounted for about 80% and 50% of the total biomass, respectively. The growth and distribution of fine roots were mainly related to soil water content. Peak values in both soil water content and fine root length were observed twice, in 2004 and 2005. The peak value of soil water content was observed 1 month prior to that of fine root length density. The fine roots were abundant 1 month later, when the volumetric soil water content reached 2.75%.  
------------------------------------------------------------------------------------------
相关文章:
Denitrifying bacteria in paddy soils of the Taihu Lake Basin, China
Residues of organochlorinated pesticides in eggs of water birds from Tai Lake in China
The adsorption of lead and copper from aqueous solution on modified peat-resin particles
Rice root growth and nutrient uptake as influenced by organic manure in continuously and alternately flooded paddy soils
Studies on coordination of soil phosphorus supply with photosynthesis of rice under different nutrient treatments
Optimum Nitrogen Use and Reduced Nitrogen Loss for Production of Rice and Wheat in the Yangtse Delta Region.
Effects of the interactions between selenium and phosphorus on the growth and selenium accumulation in rice (Oryza sativa)
Small-scale spatial variability of phosphorus in a paddy soil
磷肥和硒施用对稻米硒、钙、锌等营养累积的影响
高寒矮嵩草草甸大气-土壤-植被-动物系统碳素储量及碳素循环
相关文章分页:  共 201 页 2006 条记录 9 3[51][52][53][54][55][56][57][58][59][60]4 :

[关闭窗口]
中国生态系统研究网络 版权所有
| 网络介绍 | 联系方式 | 网站地图 |