Maize residue application reduces negative effects of soil salinity on the growth and reproduction of the earthworm Aporrectodea trapezoides, in a soil mesocosm experiment

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• 作者：Tao Jun^a ; Gu Wei^a ; Bryan Griffiths^b ; Liu Xiaojing^c ; Xu Yingjun^a ; ^{xyj@bnu.edu.cn} ; Zhang Hua^a
• 关键词：Soil salinity ; Maize residues ; Earthworm ; Reproduction ; Coastal area
• 刊名：Soil Biology & Biochemistry
• 出版年：2012
• 期刊代码：96_00380717
• 类别：abs
• 出版时间：June, 2012
• 卷：49
• 期：Complete
• 页码：46-51
• 文件大小：252 K

摘要

We studied the effects of maize residue application on some life-cycle parameters of the earthworm Aporrectodea trapezoides in saline agricultural soils with electrical conductivity (EC) ranging from 1.58 to 7.35聽dS聽m^鈭?. This experiment was carried out under controlled laboratory conditions for 150 days. Results showed that soil salinity significantly affected the growth and reproduction of earthworms, decreasing survival, numbers and mean fresh weights of adults, juveniles and cocoons. Maize residue application gave a greater survival of earthworms at all salinity levels, but the differences were only significant at an EC of 7.35聽dS聽m^鈭?, although the mean weight of adult earthworms was significantly increased by maize residue application at all salinity levels. At an EC of 1.58聽dS聽m^鈭? and 3.35聽dS聽m^鈭?, the application of maize residues gave significantly higher numbers of cocoons and juveniles, but in soils with 5.26聽dS聽m^鈭? and 7.35聽dS聽m^鈭? earthworms did not produce any cocoons over the experimental period, irrespective of maize residue application. These results indicated that maize residue application alleviated the negative effects of soil salinity on the growth and reproduction of A.聽trapezoides up to 3.35聽dS聽m^鈭?, above which maize residues only increased the growth but not on the reproduction of earthworms.