:Soil Organic Matter Composition in Coastal and Continental Date Palm Systems: Insights from Tunisian Oases论文

:Soil Organic Matter Composition in Coastal and Continental Date Palm Systems: Insights from Tunisian Oases论文

本文主要研究内容

作者(2019)在《Soil Organic Matter Composition in Coastal and Continental Date Palm Systems: Insights from Tunisian Oases》一文中研究指出:In Tunisia, the coastal Chenini oasis is characterized by a lush vegetation cover, whereas more inland continental oases(e.g., the Guettaya oasis) have a very scarce vegetation cover. For sustaining date palm production in these areas, organic fertilizers are applied,either spread on the soil surface(in Chenini) or buried under a sand layer(in Guettaya). We examined at a molecular level how these management techniques affect soil organic matter composition in oasis systems. A dominance of fresh plant input for Guettaya was indicated by solid-state 13C nuclear magnetic resonance spectroscopy signals, which was most pronounced in the uppermost soil close to palms. Evidence for more degraded organic matter was found in deeper soil near the palms, as well as in the soil distant from the palms. Amino sugar contents were low in the uppermost Guettaya soil near the palms. The overall microbial amino sugar residue contents were similar in range as those found in other dryland environments. With increasing distance from trees, the amino sugar contents declined in Guettaya, where the palms grow on bare soil, but this was not the case for Chenini, which has multi-layer vegetation cover under palms. In agreement with the results from previous dryland studies, the soil microbial community in both oasis systems was dominated by fungi in topsoil, and a shift toward bacteria-derived residues in subsurface soil. This might be due to higher variability of temperature and moisture in topsoil and/or lower degradability of fungal remains; however, further research is required to confirm this hypothesis.

Abstract

In Tunisia, the coastal Chenini oasis is characterized by a lush vegetation cover, whereas more inland continental oases(e.g., the Guettaya oasis) have a very scarce vegetation cover. For sustaining date palm production in these areas, organic fertilizers are applied,either spread on the soil surface(in Chenini) or buried under a sand layer(in Guettaya). We examined at a molecular level how these management techniques affect soil organic matter composition in oasis systems. A dominance of fresh plant input for Guettaya was indicated by solid-state 13C nuclear magnetic resonance spectroscopy signals, which was most pronounced in the uppermost soil close to palms. Evidence for more degraded organic matter was found in deeper soil near the palms, as well as in the soil distant from the palms. Amino sugar contents were low in the uppermost Guettaya soil near the palms. The overall microbial amino sugar residue contents were similar in range as those found in other dryland environments. With increasing distance from trees, the amino sugar contents declined in Guettaya, where the palms grow on bare soil, but this was not the case for Chenini, which has multi-layer vegetation cover under palms. In agreement with the results from previous dryland studies, the soil microbial community in both oasis systems was dominated by fungi in topsoil, and a shift toward bacteria-derived residues in subsurface soil. This might be due to higher variability of temperature and moisture in topsoil and/or lower degradability of fungal remains; however, further research is required to confirm this hypothesis.

论文参考文献

  • [1].Soil microbial properties under different vegetation types on Mountain Han[J]. WANG Miao,QU LaiYe,MA KeMing,YUAN Xiu.  Science China(Life Sciences).2013(06)
  • [2].Effects of seasonal variations on soil microbial community composition of two typical zonal vegetation types in the Wuyi Mountains[J]. WU Ze-yan,LIN Wen-xiong,LI Jian-juan,LIU Jin-fu,LI Bai-lian,WU Lin-kun,FANG Chang-xun,ZHANG Zhi-xing.  Journal of Mountain Science.2016(06)
  • [3].A Nonlinear Coupled Soil Moisture-Vegetation Model[J]. 刘式适,刘式达,付遵涛,孙岚.  Advances in Atmospheric Sciences.2005(03)
  • [4].Effects of vegetation height and density on soil temperature variations[J]. SONG YanTao,ZHOU DaoWei,ZHANG HongXiang,LI GuangDi,JIN YingHua,LI Qiang.  Chinese Science Bulletin.2013(08)
  • [5].Quantitative analysis of soil pores under natural vegetation successions on the Loess Plateau[J]. ZHAO ShiWei1,ZHAO YongGang1,2 & WU JinShui3 1 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,Northwest Agriculture & Forestry University,Yangling 712100,China;2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China;3 Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,China.  Science China(Earth Sciences).2010(04)
  • [6].Remotely sensed estimation and mapping of soil moisture by eliminating the effect of vegetation cover[J]. WU Cheng-yong,CAO Guang-chao,CHEN Ke-long,E Chong-yi,MAO Ya-hui,ZHAO Shuang-kai,WANG Qi,SU Xiao-yi,WEI Ya-lan.  Journal of Integrative Agriculture.2019(02)
  • [7].Effects of simulated submerged and rigid vegetation and grain roughness on hydraulic resistance to simulated overland flow[J]. YANG Ping-ping,ZHANG Hui-lan,MA Chao.  Journal of Mountain Science.2017(10)
  • [8].Impact of vegetation restoration on hydrological processes in the middle reaches of the Yellow River,China[J]. XIN Zhong-bao1,YU Xin-xiao2 Key Laboratory of Soil and Water Conservation and Desertification Combating of the Ministry of Education,Beijing Forest Univer-sity,100083,P. R. China.  Forestry Studies in China.2009(04)
  • [9].Vegetation and soil carbon storage in China[J]. LI Kerang, WANG Shaoqiang & CAO MingkuiInstitute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;Department of Geography, Maryland University, College Park,MD 20742, USA Correspondence should be addressed to Li Kerang.  Science in China(Series D:Earth Sciences).2004(01)
  • [10].General Survey of Soil Seed Bank in China[J]. Zhaoqing LI,Jingli XUE,Jie LU.  Asian Agricultural Research.2017(07)
  • 论文详细介绍

    论文作者分别是来自Pedosphere的,发表于刊物Pedosphere2019年04期论文,是一篇关于,Pedosphere2019年04期论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自Pedosphere2019年04期论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。

    标签:;  

    :Soil Organic Matter Composition in Coastal and Continental Date Palm Systems: Insights from Tunisian Oases论文
    下载Doc文档

    猜你喜欢