Life cycle and reproductive traits of the earthworm Aporrectodea trapezoides (Dugès, 1828) in laboratory cultures     

Rosa Fernández  Marta Novo  Mónica Gutiérrez  Ana Almodóvar  Darío J. Díaz Cosín 《Pedobiologia》2010,53(5):295-290

The parthenogenetic earthworm Aporrectodea trapezoides (Dugès, 1828) is widely distributed all over the world due to European agricultural practices. In order to provide baseline life cycle data, cocoons were obtained from field-collected individuals and their features and viability, incubation period, number of hatchlings and mortality rate were recorded. Singleton and twin earthworms from this first experiment were cultured from hatching during a 490-day period under controlled conditions with biomass, survival, reproductive condition and cocoon production recorded at intervals of 15 days. On average, individuals of isolated-reared A. trapezoides reached maturity at day 153 and body weight at maturity was approximately 1 g. In order to record reproductive traits and differences between field-collected and laboratory-reared individuals, 40 microcosms with an isolated earthworm (20 with field-collected individuals and 20 with laboratory-reared ones) and 40 containing groups of three (20 with each type of individual) were maintained during a complete year under controlled conditions. The amount of soil per individual was the same in both types of microcosm. Both the individuals kept in isolation and those cultured in groups produced cocoons, hence completely proving the obligatory parthenogenetic reproduction in this species without copulation or need of any physical-chemical stimulus. In general, isolated earthworms produced a significantly higher number of cocoons than those in groups of three, and the same was recorded for laboratory-reared earthworms when compared with field-collected ones. This study highlights the importance of knowing the life cycle and reproductive traits of one possible key species in soil management due to its vast distribution and high density in soils, and the species’ highly recommended use in applied studies because of its ease of culture.  相似文献   

Replacement of Fish Meal with Graded Levels of Earthworm Meal in the Diet of Fingerlings： Effect on Feed and Growth Parameters     

Nkeonyeasua Florence Olele  Josiah Chidiebere Okonkwo 《农业科学与技术》2012,(7):901-908

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用蚯蚓处理农作物秸秆可行性研究     

刘子英刘保明  薛进军刘其昌 《勤云标准版测试》2004,(4)

采用盆养的方法用牛粪和玉米秸秆(经过腐熟)的不同比例混合物饲养蚯蚓。结果表明:蚯蚓在各比例混合物中生长良好,腐熟的玉米秸秆可以作为蚯蚓饵料。整秆秸秆自然条件下饲养蚯蚓的试验表明:用农作物秸秆饲养蚯蚓是一种投资小、无风险、易操作的办法。  相似文献   

Evolution of burrow systems after the accidental introduction of a new earthworm species into a Swiss pre-alpine meadow   总被引：2，自引：0，他引：2  

Y. Capowiez  A. Pierret  P. Monestiez  L. Belzunces 《Biology and Fertility of Soils》2000,31(6):494-500

 The unintentional introduction of a new earthworm species (Aporrectodea nocturna) into a Swiss pre-alpine meadow resulted in a great increase in earthworm density in the newly colonized area (386 m^–2) compared with the density observed in the natural area (273 m^–2) where an earthworm community was already present. To investigate the impact of this introduction on the burrow systems, eight soil cores (length 25 cm, diameter 16 cm) were taken (four in the colonized area and four in the natural area) and analysed with computer-assisted X-ray tomography. The resulting images were processed to obtain the 3D-skeleton reconstructions of the earthworm burrow systems. Due to high variability in these burrow systems, only slight differences were observed between the two areas. The total burrow length and the mean burrow lengths tended to be greater in the colonized area. Moreover, the distribution of pore numbers with depth showed different patterns with a maximum for depths between 10 cm and 15 cm in the colonized area and a maximum for depths between 20 cm and 25 cm in the natural area. These differences may have been related to: (1) the particular behaviour of A. nocturna, which was observed to cast at the surface in this site, and (2) the predominance of juvenile earthworms around the colonization front. These differences were sufficient to create significant effects on the continuity of the burrow systems (assessed by the number of different pathways between virtual horizontal planes) for the two areas. The colonized area was characterized by a greater pore continuity, which could have resulted in enhanced transfer properties. Received: 2 July 1999  相似文献   

北方寒冷地区蚯蚓安全越冬模式研究     

高海  刘迎春  王彦靖  谢娇  程晓东  凤鹏  刘伟  庞凤仙 《安徽农业科学》2015,(22)

[目的]解决北方地区蚯蚓的安全越冬问题.[方法]对蚯蚓进行不同越冬模式的对比试验,探讨北方地区蚯蚓安全越冬的最佳模式.[结果]北方地区蚯蚓安全越冬的最低温度应保持在5℃以上.蚯蚓越冬模式的效果依次为地坑基料加草帘再扣塑料拱棚模式＞地坑基料上加草帘模式＞地表堆肥加盖草帘再扣小拱棚模式＞地表堆肥加盖草帘模式.[结论]地坑基料加草帘再扣塑料拱棚模式为蚯蚓安全越冬的最佳模式.  相似文献   

蚯蚓转化利用畜禽废弃物研究进展综述     

郑百龙  郑慧芬  许标文 《福建农业科技》2014,(9):66-69

蚯蚓堆肥处理畜禽有机废弃物具有显著的生态、环境及社会效益.该文综合概述了畜禽有机废弃物蚯蚓堆置处理技术、影响因素及其产物（蚓体和蚓粪）应用的主要研究进展.  相似文献   

离子色谱法测定蚯蚓粉中亚硝酸盐的含量     

李波 《四川畜牧兽医》2014,41(10):26-27

本试验采用离子色谱法测定了蚯蚓粉中亚硝酸盐的含量。结果表明,亚硝酸根进样量在0.225 2~1.801 2μg范围内与亚硝酸根色谱峰的峰面积有良好的线性关系,平均回收率为98.6%%,最低定量限以被测定溶液计算为0.03368μg·mL-1。试验证明本方法简便、准确、快速,适用于蚯蚓粉中亚硝酸盐的定量检测。  相似文献   

五味地龙汤对哮喘豚鼠血清白细胞介素-4的影响     

王文英张德新  涂献玉张渊杜亚明  李祥华 《长江大学学报》2007,4(2):109-111

目的:观察五味地龙汤对哮喘血清白细胞介素-4(IL-4)水平的影响,以探讨其治疗机制。方法:取豚鼠48只,随机分为正常对照组,哮喘模型组,地塞米松组,小青龙汤组,五味地龙汤大、小剂量组,每组8只。卵白蛋白(OVA)腹腔注射致敏,气道吸入激发建立哮喘动物模型。按豚鼠IL-4 ELISA试剂盒说明,采用双抗夹心ELISA法,测定血清IL-4含量。结果:哮喘模型组豚鼠OVA致敏并激发后出现活动减少,反应迟钝,毛色失去光泽,呼吸次数增加,呼吸困难。IL-4测定结果显示,五味地龙汤大剂量组豚鼠血清IL-4浓度为(9.27±0.86)pg·ml-1,五味地龙汤小剂量组血清IL-4浓度为(10.77±1.17)pg·ml-1,地塞米松组血清IL-4含量(9.40±2.91)pg·ml-1,与哮喘模型组(13.37±1.86)pg·ml-1比较,差异均有显著性(P<0.01)。小青龙汤组血清IL-4含量为(10.94±1.30)pg·ml-1,与哮喘模型组比较,差异亦有显著性(P<0.05)。各药物组与正常对照组(10.45±0.62)pg·ml-1比较,均无统计学意义(P>0.05)。结论:五味地龙汤能降低哮喘动物血清IL-4含量。这可能是五味地龙汤能抑制炎症介质的释放、治疗气道炎症的机制之一。  相似文献   

土壤中蚯蚓资源的开发应用研究及展望     

李典友  潘根兴  向昌国  褚清河  丁玉川 《勤云标准版测试》2005,(10)

在阅读国内外有关蚯蚓研究的100余篇论文的基础上,总结了土壤生态系统中蚯蚓资源的开发应用研究状况,梳理了蚯蚓资源开发应用的10个重要方面,提出了目前蚯蚓资源应用与开发研究的重点内容。建议进一步加强有关蚯蚓对全球变化的响应等领域应用开发研究。  相似文献   

发酵基料-蚯蚓-鳝鱼食物链物流与能流转化效率的研究     

周文宗  钦佩  白宇 《中国生态农业学报》2004,12(3):175-177

对废弃物食物链发酵基料 蚯蚓 鳝鱼的物质流和能量流转化效率研究结果表明 ,该食物链经济产品物质、能量转化效率较低 ,生物量转化效率为 0 .9% ,N、P转化效率分别为 2 .1 %和 0 .6 % ,能量转化效率为 1 .0 % ,其经济和生态效益明显  相似文献