【摘要】 【目的】探究气候干旱和极端高温不利条件下田间小气候调节的作用。【方法】以新疆大田成龄灰枣树为试验试材,在开花坐果期进行微喷灌处理T1（2 mm/d）、T2（4 mm/d）、T3（6 mm/d）和对照CK（0 mm/d）,研究枣树开花坐果期田间小气候调节对其光合特性、产量和品质的影响。【结果】枣树开花坐果期开展田间小气候调节,不仅对枣树的光合特性有显著影响,提高了枣树叶片叶绿素量、净光合速率P_n和气孔导度G_s,降低了胞间CO₂摩尔分数C_i和蒸腾速率T_r。而且有利于提高红枣产量和品质。【结论】因此,微喷灌是应对气候干旱和极端高温的有效举措,可有效改善田间作物生长环境。更多还原

【Abstract】 【Objective】In order to explore the effect of microclimate regulation in the field under the climate drought and extreme high temperature. 【Method】 In this study, three micro-sprinkler irrigation treatments T1（2 mm/d）, T2（4 mm/d）, T3（6 mm/d） and CK（0 mm/d） were carried out on mature grey jujube at flowering to fruit-setting stage. To study the effects of field microclimate regulation on photosynthesis, yield and quality of Jujube. 【Result】The results indicated that field microclimate regulation had significant effect on the photosynthesis of Jujube at flowering to fruit-setting stage, increasing the chlorophyll content, net photosynthetic rate P_n and stomatal conductance G_s, and decreased the intercellular CO₂ concentration C_i and transpiration rate T_r. Moreover, it is beneficial to improve the yield and quality of jujube. 【Conclusion】Therefore, micro-sprinkler irrigation is an effective measure to cope with climate drought and extreme high temperature, and can effectively improve the crop growth environment in the field.更多还原