间歇灌溉对水稻产量的影响及复水前后剑叶生理特征响应

Effects of Intermittent Irrigation on Rice Yield and Its Physiological Mechanisms

采用盆栽试验,研究了水稻在适度水分亏缺(TR1)和较严重水分亏缺(TR2)两个间歇灌溉处理中,复水前后的生理变化,以探明间歇灌溉条件下的生长补偿效应。结果表明,TR1与淹灌处理相比,复水前叶片气孔导度、蒸腾强度降低,而叶片净光合速率变化不大;复水后叶片净光合速率、气孔导度、蒸腾强度均明显提高。而TR2处理虽部分生理指标超过淹灌,但其补偿性效应不稳定。

The physiological changes before and after rewatering under the two intermittent irrigation patterns of the moderate water deficit （TR1） and severe water deficit （TR2） were investigated through the pot experiment to understand the growth compensation effects on yield under the intermittent irrigation. Under TR1, compared with the flooding irrigation （CK）, leaf stomata conductance, transpiration rate were lower, and leaf photosynthetic rate had no obvious changes before rewatering. After rewatering,leaf photosynthetic rate, stomata conductance and transpiration rate were obviously higher than CK. Under TR2, some physiological indexes were also better than CK after rewatering, but its compensation effects were not stable.