旱涝交替胁迫对稻田地表及地下水总磷的影响
Journal of Hohai University(Natural Sciences)(2017)
Abstract
通过蒸渗测坑对水稻拔节孕穗期和抽穗开花期2个重要生育期进行水位调控试验,研究单个生育阶段旱涝交替胁迫及2个生育阶段连续旱涝交替胁迫的稻田地表水、地下水总磷(TP)质量浓度变化.结果表明:旱涝交替胁迫对稻田地表水、地下水TP质量浓度变化影响显著,先旱后涝处理地表水的平均TP质量浓度比先涝后旱处理地表水TP质量浓度高,且P释放量下降速率快;地下水各处理受涝阶段的平均TP质量浓度比受旱阶段高,旱涝急转后TP质量浓度显著增加;与单个生育期进行旱涝交替胁迫处理相比,连续2个生育期进行旱涝交替胁迫处理时抽穗开花期TP质量浓度变化规律相似,但地表水平均TP质量浓度偏低,地下水平均TP质量浓度偏高.
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Key words
paddy field water level control experiment,drought and waterlogging alternative stress,jointing-booting stage of rice,heading-flowering stage of rice,surface water of paddy field,subsurface water of paddy field,TP mass concentration
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