据报道,土壤中有机质多易发生缺铜,质地偏沙或偏粘的稻田也可能缺铜。土壤中有机质含量高,铜易被土壤有机质(如胡敏酸等)所固定,或与多羧有机酸(如柠檬酸、琥珀酸等)形成稳定的络合物。有些田因种植水稻长期处于淹水状态,或土壤质地偏沙,土壤吸附性差,易被淋溶下移,或聚积在聚积层或者淋洗损失,也可能导致表层的含量降低。有些田由于复种指数 It is reported that more soil organic matter prone to lack of copper, the texture of partial sand or partial sticky paddy fields may also lack copper. Soil organic matter content is high, copper is easily fixed by soil organic matter (such as humic acid, etc.), or with carboxylic polycarboxylic acids (such as citric acid, succinic acid, etc.) to form a stable complex. Some fields may also cause the content of the surface layer to decrease due to long-term flooding of rice cultivation or partial sandy soil texture, poor soil adsorption, easily leaching downwards, or accumulating in accumulations or leaching losses. Some fields due to multiple crop index