The Effects of Environmental Temperature,Feed Humidity,and Feed pH on the Growth and Reproduction of Earthworms
[Objective]The aim of this study is to determine the optimal temperature,humidity,and pH for the growth and reproduction of earthworms,providing scientific basis for earthworm breeding.[Method]This study conducted three experiments:The effect of different envi-ronmental temperatures on the growth and egg laying of earthworms;The effect of different water contents of bait on the growth and egg laying of earthworms;The effect of different pH values of bait on the growth and egg laying of earthworms.[Result]The study on the effect of different temperature on the growth and reproduction of earthworm showed that the number of eggs laid was the highest at 23℃,significantly higher than the number laid at 18 and 30℃(P<0.05),slightly lower at 25℃,but the difference was not significant,and the lowest at 18℃,significantly lower than the number laid at 23,25 and 30℃(P<0.05).However,from the perspective of weight gain effect,the total weight gain under 18℃conditions was 3.022 grams,significantly higher than other treatments(P<0.05).The study on the effect of different humidity on the growth and reproduction of earthworm showed that under room temperature conditions of 23-25℃,the 65% humidity group had the best indi-vidual growth,followed slightly by the 60% and 70% humidity groups,with no significant difference(P>0.05).At 70% humidity,the number of eggs laid was significantly higher than other groups(P<0.05),and at 40% humidity,the number of eggs laid rebounded.The study on the effect of different pH values on the growth and reproduction of earthworm showed that earthworms can live and produce a small amount of co-coons within the pH 5-11 range,with a wide adaptability.They grow better at pH 9,with the highest survival rate of earthworms at pH 6 and pH 9.At pH 8,the control group outperforms any other treatment group in terms of weight gain and cocoon production.[Conclusion]The opti-mal conditions for reproduction of the earthworm Daping 2 are temperature 23℃,humidity 70%,pH 6;the optimal conditions for growth of Daping 2 are temperature 18℃,humidity 65%,pH 8-9.
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