Appendix 2—table 3. Properties of original feed and 15N-labeled feed for the three field experiments.
The original feed (in which most N was supplied by soybean powder) was supplemented with 15N-labeled soybean powder to obtain 15N-labeled feed.
| Experiment | Original feed | 15N-labeled soybean powder | 15N-labeled feed | % of labeled soybean powder in the 15N-labeled feed | |||
|---|---|---|---|---|---|---|---|
| N% | δ15N | N% | δ15N | N% | δ15N | ||
| Rice-carp | 5.58 | 1.73 | 6.61 | 1,539 | 5.25 | 649 | 33 |
| Rice-turtle | 8.21 | 8.41 | 6.98 | 445 | 7.54 | 128 | 30 |
| Rice-crab | 5.94 | 1.19 | 6.98 | 445 | 7.27 | 145 | 33 |