Table 4.
Shoot nitrogen concentration, shoot nitrogen content (quantity of N), % atom excess of 15N in shoots, Ndfa and N2‐fixation in five selected genotypes of C. arietinum grown in an artificial saline soil at Wye College, UK
| Genotype | LSD P = 0·05 | ||||
| Shoot nitrogen concentration (%) | |||||
| ECe (dS m–1) | 1·0 | 3·2 | 6·2 | 8·1 | 0·26 (among ECe) |
| ICC 4918 (non‐nodulating) | 5·28 | 4·31 | 4·52 | 4·70 | |
| CSG 8890 (salt‐sensitive) | 5·11 | 4·89 | 5·10 | 5·15 | |
| BG 256 (check) | 4·09 | 4·67 | 4·76 | 4·78 | |
| CSG 9372 (high‐nodulation) | 4·92 | 4·55 | 4·80 | 5·29 | |
| CSG 8927 (salt‐tolerant) | 5·54 | 5·01 | 5·42 | 5·50 | |
| LSD P = 0·05 | 0·29 (among genotypes) | ||||
| Shoot nitrogen content (mg per pot) | |||||
| ICC 4918 (non‐nodulating) | 30·2 | 26·4 | 22·7 | 6·3 | 4·3 (among ECe) |
| CSG 8890 (salt‐sensitive) | 38·5 | 33·9 | 25·5 | 16·2 | |
| BG 256 (check) | 43·8 | 40·9 | 30·3 | 22·2 | |
| CSG 9372 (high‐nodulation) | 48·5 | 55·4 | 54·5 | 31·2 | |
| CSG 8927 (salt‐tolerant) | 51·1 | 45·7 | 32·2 | 29·5 | |
| LSD P = 0·05 | 4·8 (among genotypes) | ||||
| % atom excess | |||||
| ICC 4918 (non‐nodulating) | 0·311 | 0·333 | 0·321 | 0·232 | 0·013 (among Ece) |
| CSG 8890 (salt‐sensitive) | 0·257 | 0·271 | 0·267 | 0·232 | |
| BG 256 (check) | 0·244 | 0·273 | 0·295 | 0·242 | |
| CSG 9372 (high‐nodulation) | 0·222 | 0·226 | 0·231 | 0·243 | |
| CSG 8927 (salt‐tolerant) | 0·220 | 0·246 | 0·249 | 0·216 | |
| LSD P = 0·05 | 0·014 (among genotypes) | ||||
| Nitrogen derived from fixation (%) | |||||
| CSG 8890 (salt‐sensitive) | 17·5 | 18·6 | 17·1 | 0·2 | 4·8 (among ECe) |
| BG 256 (check) | 21·6 | 18·2 | 8·3 | 0·0 | |
| CSG 9372 (high‐nodulation) | 28·6 | 32·1 | 28·2 | 0·0 | |
| CSG 8927 (salt‐tolerant) | 29·2 | 26·1 | 22·5 | 7·1 | |
| LSD P = 0·05 | 4·8 (among genotypes) | ||||
| Nitrogen fixation (mg per pot) | |||||
| CSG 8890 (salt‐sensitive) | 6·7 | 6·3 | 4·4 | 0·0 | 2·3 (among ECe) |
| BG 256 (check) | 9·5 | 7·4 | 2·5 | 0·0 | |
| CSG 9372 (high‐nodulation) | 13·9 | 17·8 | 15·4 | 0·0 | |
| CSG 8927 (salt‐tolerant) | 14·9 | 11·9 | 7·2 | 2·1 | |
| LSD P = 0·05 | 2·3 (among genotypes) |
Plants were harvested 60 d after sowing.