The effects of organic amendments on the restoration of a disturbed coastal sage scrub habitat
The effects of organic amendments on the restoration of a disturbed coastal sage scrub habitat
复制标题
有机改良剂对受干扰的沿海鼠尾草灌木栖息地恢复的影响
DOI：
10.1046/j.1526-100x.1998.00617.x
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发表时间：
1998
影响因子：
3.2
通讯作者：
M. Allen
中科院分区：
文献类型：
--
作者：
Thomas A. Zink Ret;M. Allen
通过土壤分析和地上植物生长，通过调查有机改良剂对微生物活性和氮固定的影响，研究了有机覆盖物作为一种简单方法的有效性，通过为本地多年生植物（如加州蒿）和外来一年生植物（如野燕麦）提供竞争优势，来加强受干扰土地的恢复。添加有机改良剂导致微生物活性增加，氮固定量平行增加，但土壤总氮没有显着差异。氮可能逐渐从其更容易利用的硝酸盐形式中被去除，并被固定在不断增加的微生物生物量的组织中。有机改良地块种植的本地多年生加州苜蓿幼苗的成活率几乎是对照地块幼苗的两倍，并且植株体积显着更高。当氮的可用性因增加固定而减少时，修改后的地块建立了一个更有利于本土多年生灌木的环境，使它们能够在水分和养分方面胜过外来一年生植物。这个简单的程序可能对加强受干扰土地的恢复产生重大影响。
The effectiveness of organic mulch as a simple means of enhancing the restoration of disturbed lands by providing a competitive edge to native perennials, such as Artemisia californica (California sagebrush), over exotic annuals, such as Avena fatua (wild oat), was studied by investigating the effect of organic amendments on microbial activity and nitrogen immobilization through both soil analysis and above-ground plant growth. The addition of organic amendment resulted in an increase in microbial activity, a parallel increase in nitrogen immobilization, and no significant differences in total soil nitrogen. It is likely that nitrogen was gradually being removed from its more available form of nitrate and being immobilized in the tissues of the increasing microbial biomass. The survival rate of planted native perennial seedlings of A. californica in organic amended plots was almost double that of control-plot seedlings, and plant volume was significantly higher. When the availability of nitrogen was reduced through increased immobilization, amended plots established an environment more conducive to native perennial shrubs, allowing them to outcompete exotic annuals for water and nutrients. This simple procedure could have major implications for enhancing the restoration of disturbed lands.