Table 3.
Symbiotic performance, dry matter and grain yield of 9 cowpea varieties grown at Taung, South Africa.
| Genotype | Nodule number | Nodule DM | Shoot DM | δ15N | Ndfa |
|---|---|---|---|---|---|
| per plant | mg.plant-1 | g.plant-1 | ‰ | % | |
| Omondaw | 15.6 ± 1.2d | 236.7 ± 14.4de | 11.4 ± 1.4ef | -0.2 ± 0.0de | 77.0 ± 0.6bcd |
| Brown eye | 15.8 ± 2.4d | 361.7 ± 19.5cde | 12.3 ± 1.7def | 0.2 ± 0.0c | 72.6 ± 1.0cd |
| Apagbaala | 24.1 ± 0.6c | 131.7 ± 10.1e | 12.1 ± 0.7def | 0.9 ± 0.1b | 61.2 ± 2.0ef |
| IT82D-889 | 20.3 ± 0.3cd | 1437.2 ± 117.9a | 13.5 ± 0.6cde | 0.9 ± 0.1b | 92.9 ± 1.7a |
| ITH98-46 | 22.8 ± 2.8c | 263.3 ± 8.8de | 7.4 ± 0.9f | -0.5 ± 0.1ef | 81.5 ± 1.3bc |
| Bechuana white | 33.4 ± 0.5b | 665.3 ± 71.8b | 18.1 ± 2.0bc | 0.1 ± 0.0cd | 85.4 ± 6.1ab |
| Glenda | 33.4 ± 0.5b | 398.9 ± 7.3cd | 22.2 ± 0.8b | 1.9 ± 0.3a | 59.3 ± 3.6f |
| Mamlaka | 24.5 ± 1.4c | 132.2 ± 15.4e | 16.7 ± 2.9cd | 0.7 ± 0.1b | 69.8 ± 4.9d |
| Fahari | 42.5 ± 0.6a | 538.6 ± 6.1bc | 27.8 ± 1.9a | -0.6 ± 0.0f | 77.0 ± 0.6bcd |
| F-statistics | 31.1*** | 27.6*** | 15.1*** | 44.3*** | 10.5*** |
| N content | Grain yield | N-fixed | |||
| mg.plant-1 | kg.ha-1 | mg.plant-1 | kg.ha-1 | ||
| Omondaw | 580.6 ± 88.9cde | 2231.3 ± 297.9a | 446.3 ± 46.2bcd | 74.4 ± 7.0bcd | |
| Brown eye | 563.1 ± 74.0cde | 512.1 ± 66.1c | 409.6 ± 57.5bcd | 68.3 ± 9.6bcd | |
| Apagbaala | 566.2 ± 58.8cde | 579.8 ± 47.7c | 348.0 ± 47.5cd | 58.0 ± 7.9cd | |
| IT82D-889 | 473.1 ± 15.2de | 1427.7 ± 145.0b | 438.9 ± 6.9bcd | 73.1 ± 1.1bcd | |
| ITH98-46 | 378.9 ± 35.5e | 1500.4 ± 167.6b | 307.7 ± 38.3d | 51.3 ± 6.4d | |
| Bechuana white | 727.5 ± 84.2cd | 1494.3 ± 115.4b | 620.8 ± 47.5b | 103.5 ± 13.7b | |
| Glenda | 1021.0 ± 99.3ab | 1892.1 ± 129.9ab | 598.8 ± 22.1b | 99.8 ± 3.7b | |
| Mamlaka | 784.8 ± 39.1bc | 1651.8 ± 96.2ab | 561.4 ± 40.6bc | 93.6 ± 8.4bc | |
| Fahari | 1219.3 ± 90.3a | 1588.2 ± 107.7b | 931.6 ± 27.3a | 155.3 ± 4.5a | |
| F-statistics | 10.1*** | 8.8** | 8.2*** | 8.2*** | |