Table 1 Experimental treatment of water–nitrogen coupling in Isatis indigotica.
Treatment | Serial number | N application/(kg hm−2) | Field water capacity (%) |
|---|---|---|---|
Low water, low nitrogen | W1N1 | 150 | 60–70 |
Low water, medium nitrogen | W1N2 | 200 | 60–70 |
Low water, high nitrogen | W1N3 | 250 | 60–70 |
Medium water, low nitrogen | W2N1 | 150 | 70–80 |
Medium water, medium nitrogen | W2N2 | 200 | 70–80 |
Medium water, high nitrogen | W2N3 | 250 | 70–80 |
High water, low nitrogen | W3N1 | 150 | 80–90 |
High water, medium nitrogen | W3N2 | 200 | 80–90 |
High water, high nitrogen | W3N3 | 250 | 80–90 |
Control treatment | W0N0 | 0 | 0 |
