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植物光合与水分生理特征是植物逆境适应能力评价的重要参考指标。通过监测植物叶水势和光合作用,探讨了干热河谷3个主要植被恢复树种的光合与水分生理特性时空变化规律的灌溉效应。结果表明:灌溉能有效地提高供试树种在3月干季和5月干热季时的叶水势,能显著减轻或解除木豆、大叶相思和印楝在干季或干热季节所受到的光合抑制,发现灌溉效应在干热季节更为显著。灌溉有利于干热河谷逆境条件下的植被恢复。
Plant photosynthesis and water physiological characteristics of plant adversity ability to adapt to the evaluation of an important reference index. By monitoring the leaf water potential and photosynthesis of plants, the irrigation effects of spatio-temporal variation of photosynthesis and water physiological characteristics of three main vegetation restoration species in the dry-hot valley were discussed. The results showed that irrigation could effectively improve the leaf water potential of the tested tree species in dry season in March and May in dry season, and significantly reduce or eliminate the effects of dry season or dry season Photosynthesis inhibition, irrigation effects were found to be more pronounced in the dry-hot season. Irrigation is good for vegetation restoration in dry and hot valley under adverse conditions.