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张花, 杨效东, 杜 杰, 吴艺雪. 2008: 土壤温度和湿度对外来种蚯蚓Pontoscolex corethrurus 产茧和幼蚓孵化的影响. 动物学研究, 29(3): 305-312. DOI: 10.3724/SP.J.1141.2008.03305
引用本文: 张花, 杨效东, 杜 杰, 吴艺雪. 2008: 土壤温度和湿度对外来种蚯蚓Pontoscolex corethrurus 产茧和幼蚓孵化的影响. 动物学研究, 29(3): 305-312. DOI: 10.3724/SP.J.1141.2008.03305
ZHANG Hua, YANG Xiao-dong, DU Jie, WU Yi-xue. 2008. Influence of Soil Temperature and Moisture on the Cocoon Production and Hatching of the Exotic Earthworm Pontoscolex corethrurus
. Zoological Research, 29(3): 305-312. DOI: 10.3724/SP.J.1141.2008.03305
Citation: ZHANG Hua, YANG Xiao-dong, DU Jie, WU Yi-xue. 2008. Influence of Soil Temperature and Moisture on the Cocoon Production and Hatching of the Exotic Earthworm Pontoscolex corethrurus
. Zoological Research, 29(3): 305-312. DOI: 10.3724/SP.J.1141.2008.03305

土壤温度和湿度对外来种蚯蚓Pontoscolex corethrurus 产茧和幼蚓孵化的影响

Influence of Soil Temperature and Moisture on the Cocoon Production and Hatching of the Exotic Earthworm Pontoscolex corethrurus

  • 摘要: 通过采用主处理为土壤温度,副处理为土壤湿度的裂区区组实验设计,在室内微生态条件下控制土壤温度和湿度培养蚯蚓,探讨了3种土壤温、湿度对热带外来种蚯蚓Pontoscolex corethrurus成蚓产茧和蚓茧孵化的影响。研究结果表明,P. corethrurus成蚓在20—30℃土壤温度范围、25%—35%土壤湿度环境中均可持续产茧和孵化幼蚓,培养时间、土壤温湿度对蚯蚓的产茧和孵化呈现显著影响。20%土壤湿度下成蚓休眠或死亡。35%土壤湿度下呈现最大蚓茧产量和幼蚓孵化量。在较好(35%)土壤湿度下产茧数表现为高温好于低温,反之亦然;在适宜(25%—35%)土壤湿度下幼蚓孵化率随温度升高而增加,但呈现高、低温的限制作用,即25℃土壤温度和35%土壤湿度时出现最高幼蚓孵化率。在适宜的土壤温湿度范围内,湿度较温度对蚯蚓繁殖具有更显著的控制作用,温度的影响在一定程度上可通过土壤湿度加以调节。

     

    Abstract: Laboratory experiments with split—plot block design were conducted to examine the effects of soil temperature and moisture on cocoon production and hatching of the exotic earthworm Pontoscolex corethrurus under controlled conditions. Results showed that consecutive cocoon production and hatching took place at all three soil temperatures and at the two higher soil moisture conditions, used in this experiment. Cultivation time, soil moisture and temperature had significant effects on cocoon production and hatching of P. corethrurus. Earthworms suffered a diapause or even died when reared in soil with 20% moisture content. The greatest cocoon production and hatching rate were observed at 35% soil moisture content. When soil moisture was preferable (e.g. 35%), cocoon production was greater at higher temperatures than at lower temperatures. Hatching rate increased with soil temperature if the soil moisture content was preferable; however it was restrained if the temperature was too high or too low. The greatest hatching rate only occurred at a combination of 25°C soil temperature and 35% soil moisture content. The results also showed that soil moisture was the primary factor limiting the reproduction of P. corethrurus, the effects of soil temperature on earthworm reproduction was influenced by soil moisture.

     

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