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Agricultural system diversification is well known to affect the population dynamics of crop pests, but predator–prey dynamics in crop systems are difficult to analyse due to interactions between(More)
摘要: 棉花是耐干旱和耐盐碱的经济作物。随着土壤的盐碱化和干旱化, 在人口数量和植棉成本剧增的背景下, 我国黄河流域和长江流域棉花种植面积锐减, 棉花种植被迫向滨海盐碱地和内陆及西北干旱地区转移。本文于 2013年和2014年在山东东营滨海盐碱地和河北枣强半干旱轻度盐碱地以非转基因棉(‘中棉所49’)为对照, 以转Bt 基因棉(‘中棉所79’)为试验材料, 分别作施农药和不施农药处理,(More)