Extraction of earthworm from soil by different sampling methods: a review

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• 作者：Jaswinder Singh ; Sharanpreet Singh…
• 关键词：Earthworm ; Hand sorting ; Formalin method ; Mustard extraction and AITC ; Onion extraction method
• 刊名：Environment, Development and Sustainability
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：18
• 期：6
• 页码：1521-1539
• 全文大小：449 KB
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environmental Management
  Economic Growth
  Ecology
  Economic Geology
  Environmental Economics
  
• 出版者：Springer Netherlands
• ISSN：1573-2975
• 卷排序：18

文摘

Earthworms are so closely incorporated into the soil structure that they are not calculated easily from the soil. Due to this property, their extraction from soil is tedious and time-consuming. Different methods have been used for their extraction from the soil, and efficiency of each method is affected by physical properties, viz., temperature and moisture of the soil. This study explored the advantage and disadvantage of different sampling methods for the extraction of earthworms such as hand sorting, octet method, formalin method, mustard extraction method, allyl isothiocyanate (AITC), and onion extraction method. Extraction efficiency of formalin is 20–60 times more as compared to hand sorting, but hand sorting gives satisfactory results for earthworms of more than 0.2 g live weight, and cocoons can also be recovered by this method. Octet method is effective in extracting anecic species and could easily be applied to site where chemical extraction is not a viable option. Extraction by mustard and AITC is simple, low cost, and more efficient for the extraction of deep-burrowing anecic species. The onion extraction solution is low cost and nontoxic which can be used as alternative to formalin. Like mustard, the onion solution is also inexpensive and not harmful to the earthworms and environment.