发布网友 发布时间:2024-10-23 20:27
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热心网友 时间:2分钟前
在每个容器均添加十条蚯蚓。土壤每四周更换一次,蚯蚓被放置在新污染的土壤里。在实验期间,每周都将蚯蚓称重,以确定每种农药对生长的影响。在称量之前,把所有蚯蚓都从土壤拣出来,用自来水冲洗,并放在濡湿的滤纸上,把水份吸干,并使用电子天平称量。之后,就把蚯蚓放回到土壤之中。在所有的实验中,每周都会检查水分含量,并将湿度保持在50%,以前一周采样本前的已知重量(为基准)来调整容器的重量。实验持续了4周。
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原文如下:
Ten worms were added at each container. Soil was changed every four weeks and earthworms were placed into fresh contaminated soil. Earthworms were weighed weekly during experiment to determine the effect of each pesticide on growth. Before weighing, all worms were sorted out of the soil, washed with tap water and left on wet filter paper, then blotted off and weighed using an electro-balance. Worms were then returned to the soil. During all experiments, moisture content was checked weekly and maintained at 50% by adjusting the weight of the container against the weight known from the previous week prior to sampling. The experiment lasted for 4 weeks.