甘南高寒牧区复种单播和禾豆混播草地光合性能的差异  

Differences of the Photosynthetic Performance between Mono-and Grass-legume Mixture of the Double Cropped Pasture in Gannan Alpine Pasture

作　　者：张文轩 裴亚斌 田新会[1] 杜文华[1] ZHANG Wen-xuan;PEI Ya-bin;TIAN Xin-hui;DU Wen-hua(College of Pratacultural Science,Gansu Agricultural University/Key Laboratory of Grassland Ecosystem,Ministry of Education/Sino-U.S.Centers for Grazingland Ecosystem Sustainability,Lanzhou 730070,China)

机构地区：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中-美草地畜牧业可持续发展研究中心,甘肃兰州730070

出　　处：《中国草地学报》2022年第8期52-60,共9页Chinese Journal of Grassland

基　　金：甘肃省重点研发(20YF8NA129);西藏重大专项(XZ202101ZD003N);国家自然科学基金(31760702)共同资助。

摘　　要：以秋播小黑麦为前茬作物,收获小黑麦后复种不同一年生植物(小黑麦单播,黑麦单播,燕麦单播,箭筈豌豆单播,禾豆混播:50%小黑麦+50%箭筈豌豆,40%黑麦混播+60%箭筈豌豆,50%燕麦+50%箭筈豌豆),研究光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、胞间CO_(2)浓度(Ci)、水分利用率(WUE)的差异,以明确复种单播和禾豆混播草地光合性能的差异,为筛选一年两季饲草生产技术奠定基础。结果表明:复种混播50%小黑麦+50%箭筈豌豆和50%燕麦+50%箭筈豌豆草地的光合性能无显著差异,二者Pn、Tr和WUE均较高。50%燕麦+50%箭筈豌豆处理的水分利用率高于其余6个处理。因此,秋播小黑麦复种50%燕麦+50%箭筈豌豆草地的光合性能最佳。This research aimed to study the differences in photosynthetic characteristics between mono-(triticale,rye,oat,and vetch)and gramineous-leguminous(50%triticale mixed with 50%vetch,40%rye mixed with 60%vetch,and 50%oat mixed with 50%vetch)mixed sowing annual pasture in alpine pastoral areas of southern Gansu.The present study also measured photosynthetic parameters,including the photosynthetic rate(Pn),stomatal conductance(Gs),transpiration rate(Tr),intercellular CO_(2) concentration,and water use efficiency(WUE).The results showed no significant differences in photosynthetic characteristics between mixed sowing treatment of 50%triticale+50%vetch and mixed sowing treatment of 50%oat+50%vetch.The above two treatments had higher values of Pn,Tr,and WUE.The WUE of mixed sowing treatment of 50%oat+50%vetch was significantly higher than that of the other six treatments.Therefore,the photosynthetic characteristics of the mixture of 50%oat and 50%vetch were the best in the autumn sowing process after the triticale harvest.

关 键 词：甘南高寒牧区 单播 禾豆混播 光合性能 

分 类 号：S54[农业科学—作物学]