基于SPAD值和光合特性评价10个饲用燕麦品种耐热能力

Evaluation of heat tolerance of ten forage oats based on SPAD value and photosynthetic characteristics

【目的】在北方沙化地区选育高产高效饲用燕麦品种提。【方法】在科尔沁沙地种植10个饲用燕麦品种,在孕穗期进行覆膜高温处理,以未处理为对照,测定叶片的荧光参数和叶绿素SPAD值。【结果】高温胁迫下的各饲用燕麦品种SPAD值、可变荧光值和潜在光化学效率低于对照;利用隶属函数分析不同饲用燕麦品种抗高温能力,从大到小排序为莫妮卡>骏马>科纳>贝勒>甜燕1号>燕王>梦龙>牧王>牧乐思>枪手。【结论】莫妮卡、骏马和科纳为适合科尔沁沙地种植的耐高温品种。

【Objective】To provide theoretical basis for planting forage oat varieties with high yield and high effi⁃ciency in northern desertification area.【Method】Ten forage oat varieties were planted in Horqin sandy land,and were treated with film coating at high temperature at booting stage with untreated oats as the control.The fluores⁃cence parameters and chlorophyll SPAD values of the leaves were determined.【Result】The results showed that un⁃der high temperature stress feeding Oat varieties showed lower SPAD value,variable fluorescence value and poten⁃tial photochemical efficiency than those of control.The temperature tolerance of different forage oat varieties was ana⁃lyzed by membership function,and the order was Monica>Junma>Kona>Baylor>Sweet Yan No.1>Yan Wang>Menglong>Mu Wang>Mulus>Gunner.【Conclusion】Monika,Junma and Kona were selected as high temperature tolerant varieties suitable for planting in this area.