Appendix 2—table 2. The total P removed with the harvested products under rice monoculture and coculture in the field experiment.
Values are means ± SE (n = 6)
| System | Treatment | Rice grain*(kg ha–1) | Rice straw*(kg ha–1) | Aquatic animal*(kg ha–1) | Total(kg ha–1) | |
|---|---|---|---|---|---|---|
| Rice-carp | RM | 18.53 ± 0.92 | 5.49 ± 0.25 | --- | 24.02 ± 1.15 | |
| RA | 21.68 ± 0.50 | 6.44 ± 0.32 | 7.45 ± 0.95 | 35.57 ± 0.96 | ||
| Rice-crab | RM | 26.38 ± 1.53 | 8.60 ± 0.67 | --- | 34.98 ± 1.87 | |
| RA | 34.74 ± 2.19 | 13.67 ± 1.04 | 1.07 ± 0.15 | 49.48 ± 2.79 | ||
| Rice-turtle | RM | 19.57 ± 0.72 | 12.64 ± 0.44 | --- | 32.21 ± 0.42 | |
| RA | 24.19 ± 1.17 | 17.19 ± 0.69 | 20.66 ± 1.47 | 62.04 ± 2.60 | ||
*
The total amount of P contained in the grain and straw of rice plants, and in the aquatic animals were determined by multiplying the biomass of rice (grain and straw) and aquatic animals by the percentage of P in rice and aquatic animals that were analyzed with a San++ Continuous Flow Analyzer (Skalar, Netherlands) (Lu, 1999).