接种不同根瘤菌对沙地苜蓿结瘤及生长状况的影响

Effects of different rhizobium inoculation on growth of Medicago and nodule in sandy land

摘要:

筛选出适合科尔沁沙地种植的根瘤菌-苜蓿最佳匹配组合,试验以编号为9、8-3、5-1、18-1、Z12.3的根瘤菌菌株作为菌源,以不接种根瘤菌作对照,进行了不同紫花苜蓿和杂花苜蓿品种接种不同根瘤菌试验,分析了接种根瘤菌对苜蓿生长特性及根瘤生长的影响。结果表明:肇东-(9)、农菁8号-(8-3)、东苜1号-(5-1)、草原3号-(5-1)、公农1号-(18-1)5个组合的植株高度较其对照显著增高;农菁8号-(8-3)和草原3号-(5-1)组合的根瘤重量较其对照显著增加;肇东-(9)、肇东-(18-1)、草原3号-(5-1)3个组合的根瘤数较其对照显著增加;东苜1号-(5-1)、公农1号-(18-1)及草原3号-(5-1)的苜蓿单位面积枝条数较对照增加显著;亦有接种后株高、根瘤数和产量较对照低的组合。草原2号-(18-1)和公农1号(18-1)两组根瘤菌苜蓿匹配组合较好,适合在科尔沁地区推广应用。

Abstract:

Five rhizobium strains (code: 9,8-3,5-1,18-1 and Z12.3) and 5 Medicago cultivars (M .sativacv.Zhaodong,M .sativa cv.Dongmu No.1,M .sativa cv.Gongnong No.1,M .sativa cv.Nongjing No.8,M .varia cv.Caoyuan No.2 and M .varia cv.Caoyuan No.3) were used to study the best matching combination ofrhizobium-Medicago for sandy land in Horqin.The results showed that plant heights of 5 combinations,includingZhaodong -(9),Nongjing No.8 -(8-3),Dongmu No.1 -(5-1),Caoyuan No.3-(5-1) and Gongnong No.1 -(18-1),were significantly higher than control;nodule weights of 2 combinations,including Nongjing No.8 -(8-3) and Caoyuan No.3 -(5-1),were significantly higher than control;nodules of 3 combinations,including Zhaodong-(9),Zhaodong -(18-1) and Caoyuan No.3 -(5-1) increased significantly compared with control;the numberof branches per unit area in combinations of Dongmu No.1 -(5-1),Gongnong No.1 -(18-1) and CaoyuanNo.3 -(5-1) increased significantly compared with control;the hay yield in combinations of Caoyuan No.2 -(18-1) and Gongnong No.1 -(18-1) increased significantly (19.1% and 13.5%) compared with control.But after inoculation,the height,number of nodules and yield of some varieties were lower than control.And this might becaused by the unmatched symbiosis.The combinations of Caoyuan No.2-(18-1) and Gongnong No.1-(18-1)were the best.