• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Australasian Plant Pathology >Systemic iron implants alleviate symptoms of Mundulla Yellows in roadside eucalypts in south east South Australia
【24h】

Systemic iron implants alleviate symptoms of Mundulla Yellows in roadside eucalypts in south east South Australia

机译：全身铁植入于南澳大利亚东南部路边桉树的Mundulla黄蜂症状

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Mundulla Yellows is a dieback disorder of trees (predominantly eucalypts) along roadsides in the southeast of South Australia, characterized by interveinal yellowing of leaves and eventual death. There are two main theories about the cause of Mundulla Yellows: (1) that the yellowing is lime chlorosis, caused by crushed limestone dust from roads being washed into soil, and (2) that it is caused by an irreversible and transmissible biotic pathogen. We tested the lime chlorosis hypothesis by inserting nutrients directly into the sapwood of symptomatic trees using systemic nutrient implants. If the lime chlorosis hypothesis is correct, nutrient injections of iron and manganese should increase chlorophyll synthesis and result in leaves becoming greener. We applied four different nutrient combinations (iron, manganese, iron + manganese, and a treatment that included a range of essential plant nutrients), as well as control treatments, to symptomatic trees across 10 sites. After 14 weeks there were significant increases in leaf greenness and crown health, compared to controls, when trees received either iron or iron and manganese implants. The results add further weight to the lime chlorosis hypothesis. Nutrient implants are unlikely to be a viable management strategy due to their cost and potentially short-term benefits, and trees will inevitably be lost from the region's roadsides. Management options should involve increasing revegetation efforts and natural passive regeneration of trees away from affected roadsides, and revegetating the affected areas with species that are suited to the changed soil conditions.
机译：Mundulla Yellows是南澳大利亚东南部的脚道（主要是桉树）的沉浸障碍，其特征是叶子的中间黄色和最终死亡。关于Mundulla Yellows的原因有两种主要理论：（1）黄变为石灰氯化，由被冲洗到土壤中的碎石灰尘，由被冲入土壤的道路引起，（2）是由不可逆和传播的生物病原体引起的。我们通过使用全身营养植入物将营养素直接插入症状树木的SAPWOOD中来测试石灰氯化假设。如果石灰萎黄假想是正确的，营养素注射的铁和锰应该增加叶绿素合成并导致叶片变得更绿。我们应用了四种不同的营养组合（铁，锰，铁+锰，包括一系列基本植物营养素的治疗），以及控制治疗，对10个地点的症状树木。 14周后，与对照组相比，叶绿度和冠氏料量有显着增加，当时树木接受铁或铁和锰植入物时。结果为石灰氯化假设增加了重量。由于其成本和潜在的短期福利，营养植入物不太可能成为可行的管理战略，树木将不可避免地从该地区的道路上丢失。管理期权应涉及将树木的恢复努力和自然被动再生涉及远离受影响的道路，并将受影响的地区与适合于改变的土壤条件的物种植入。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号