Abstract Cover crops are an essential element of sustainable agriculture and can affect earthworm populations. In a field trial, we investigated the effects of four cover crop treatments: radish (Raphanus sativus var. longipinnatus B.; at high and low seed density), black oat (Avena strigosa Schreb.) and Sudan grass (Sorghum sudanese M.) on earthworms under two irrigation regimes. The two parallel field trials (irrigated and rainfed) demonstrated the significance of soil moisture for earthworm abundance with lower numbers under rainfed black oat and Sudan grass compared with moister bare fallow in autumn (P

中文翻译：

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覆盖作物对蚯蚓的对比影响：田间监测和实验室试验对生长、繁殖和食物选择的结果

摘要 覆盖作物是可持续农业的重要组成部分，会影响蚯蚓种群。在田间试验中，我们研究了四种覆盖作物处理的效果：萝卜（Raphanus sativus var. longipinnatus B.；在高和低种子密度下）、黑燕麦（Avena strigosa Schreb.）和苏丹草（Sorghum sudanese M.）在两种灌溉制度下的蚯蚓。两个平行的田间试验（灌溉和雨育）证明了土壤水分对蚯蚓丰度的重要性，与秋季潮湿的裸休相比，雨养黑燕麦和苏丹草下的蚯蚓数量较少（P