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首页> 外文期刊>Land Degradation and Development >Influence of different sewage sludges and composts on growth, yield, and trace elements accumulation in rice and wheat
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Influence of different sewage sludges and composts on growth, yield, and trace elements accumulation in rice and wheat

机译：不同污水污泥的影响和堆肥对稻米和小麦生长，产量和微量元素积累的影响

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摘要

The use of sewage sludge (SS) and solid waste composts in agriculture is considered as one of the best disposal options. In this study, impact of different composts and SS was evaluated on the soil quality, growth, and yield performance of rice and wheat crops. Four types of composts and SS were collected from different sources and applied in soil at 0.5% (5gkg(-1) soil) and 1.0% (10gkg(-1) soil) in comparison with chemical fertilizer (no SS/compost). The application of all types of composts at all the tested rates increased the straw and grain yields of both the crops compared with control. Nevertheless, application of Lahore compost and all SS (1.0%) resulted in a significant increase in the concentration of cadmium (Cd), copper (Cu), lead (Pb), and zinc (Zn) in plant parts. The Cd concentration in rice grains with Lahore compost and Kasur SS applied at the rate of 1.0% was above the safe limit. The trace elements in wheat grains with all composts and SS at all the tested rates remained within safe limits. The release of amendment bound trace elements in soil solution was highly dependent upon dissolved organic carbon and concentration of these trace elements especially for Cu and Zn. Application of SS at low level (0.5%) and compost (except Lahore compost) at both levels could be a better strategy to exploit their benefits in terms of crop performance and soil quality. However, application of SS and compost at high rates may lead to accumulation of trace elements in rice grains limiting its suitability for human consumption.
机译：使用污水污泥（SS）和农业固体废物堆肥被认为是最好的处置选择之一。在这项研究中，对水稻和小麦作物的土壤质量，生长和产量性能进行了评估了不同堆肥和SS的影响。与化学肥料相比所有类型的堆肥在所有测试的速率中的应用增加了与对照相比秸秆和谷物产量。然而，Lahore堆肥的应用和所有SS（1.0％）导致植物零件中镉（Cd），铜（Cu），铅（Pb）和锌（Zn）的浓度显着增加。用Lahore Concost和Kasur SS的水稻粒子中的CD浓度以1.0％的速率施加的高于安全限制。小麦粒子中的微量元素，所有测试率的所有堆肥和SS都保持在安全限制范围内。在土壤溶液中释放的乳质结合微量元素高度依赖于溶解的有机碳和这些微量元素的浓度，特别是对于Cu和Zn。 SS在低水平（0.5％）和堆肥（Lahore Compost除外）在两个级别的应用可能是在作物性能和土壤质量方面利用其益处的更好的策略。然而，在高速率下施加SS和堆肥可能导致水稻谷物中的微量元素积聚限制其适用于人类消费的适用性。

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