休耕地和耕地利用制度对尼日利亚阿夸伊博姆州Uruk Osung社区土壤大型无脊椎动物群落组成和丰度的影响

A. Akpan, M. Chukwu, I. K. Esenowo, M. Johnson, D. Archibong
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引用次数: 1

摘要

本研究旨在评估休耕和耕地利用制度对土壤大型无脊椎动物群落丰度的影响。每两周采集一次土壤样本,每月两次,为期四个月。采用Berlese-Tullgren漏斗萃取器和洗脱技术对土壤大型无脊椎动物进行了提取。休耕土壤的pH平均值为6.93+/-0.25,温度平均值为32.08+/-0.52oC,水分平均值为15.60+/-1.22 oc,耕地土壤的pH平均值为4.43+/-0.16 oc,温度平均值为30.95+/-0.19oC。共发现土壤大型无脊椎动物4纲11目17种。在517个土壤大型无脊椎动物个体中,休耕地有327个,代表4个纲,耕地有190个,代表3个纲。休耕地中丰度最大的优势种包括;cryptoterme sp 67(20.49%) > Blatta sp 56(17.12%), Hogna sp 1(0.0.30%)最少;在耕地土壤中,优势种为Cryptotermes sp. 79(41.58%) >Lasius sp. 30(15.79%) > Lumbricus terrestris 21(11.05%),最小种为Paraponera sp. 1(0.53%)。土壤温度与苔藓丰度呈显著正相关(r = 0.851;p < 0.05)和昆虫组(r = 0.826;p < 0.05),土壤pH值与双足类动物丰度呈正相关(r = 0.911;P≤0.05)。综上所述,人类活动干扰了耕地土壤大型无脊椎动物群落结构,这反映在两个采样点土壤大型无脊椎动物的相对丰度上。本研究结果可为土壤大型无脊椎动物的保护和管理提供参考,发挥其平衡农业生态系统的作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Fallowed and Cultivated Land Use Systems on the Composition and Abundance of Soil Macroinvertebrates Assemblage in Uruk Osung Community, Akwa Ibom State, Nigeria
This study was to assess the effect of fallowed and cultivated land-use systems on the abundance of soil macroinvertebrates assemblage. Collections of soil samples were carried out fortnightly twice a month for four months. The extraction of soil macroinvertebrates was carried out using Berlese-Tullgren funnel extractor, and elutriation technique. The mean values of 6.93+/-0.25 were recorded for pH, 32.08+/-0.52oC for temperature, 15.60+/-1.22 for moisture content, were recorded for fallowed soil, and 4.43+/-0.16 (pH), 30.95+/-0.19oC (temperature) were recorded for cultivated soil. A total of 17 soil macroinvertebrates species comprising of 11 orders, from four classes were encountered. Out of the 517 individual soil macroinvertebrates encountered, 327 individuals representing four classes were present in the fallow land while 190 individuals representing three classes were present in the cultivated land. The most dominant species in terms of abundance in the fallowed land site included; Cryptotermes sp 67(20.49%) > Blatta sp 56(17.12%) with Hogna sp 1(0.0.30%) the least; while Cryptotermes sp. 79(41.58%) >Lasius sp 30(15.79%) > Lumbricus terrestris 21(11.05%) represents the dominant species in the cultivated soil with Paraponera sp 1(0.53%) the least. Soil temperature showed positive correlation with the abundance of Clitellata (r = 0.851; p < 0.05) and Insecta (r = 0.826; p < 0.05) and Soil pH showed positive correlation with the abundance of Diplopoda (r = 0.911; p ≤ 0.05). In conclusion, it could be deduced from the study that human activities in the cultivated site perturb soil macroinvertebrates community structure which is reflected in the relative abundance of soil macroinvertebrate from the two sampling sites. The results obtained in this study could be a piece of pointing information for the conservation and management of the soil macroinvertebrates giving their functions in balancing agroecosystems.
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