Table 1.
Treatment description (Exp. 1)1
| Trt | Phase I (d 0 to 14) | Phase II (d 15 to 42) | |
|---|---|---|---|
| 1 | NRC control (CuSO4 at 6 mg/kg) | Cu 6 mg/kg, Mn 4 mg/kg, Zn 100 mg/kg from sulfates | Cu 5 mg/kg, Mn 3 mg/kg, Zn 80 mg/kg from sulfates |
| 2 | CuSO4 at 170 mg/kg | Cu 170 mg/kg, Mn 150 mg/kg, Zn 150 mg/kg from sulfates | Same as phase I |
| 3 | Cu(HMTBa)2 at 170 mg/kg2 | Cu(HMTBa)2 170 mg/kg, Mn 150 mg/kg, Zn 150 mg/kg from sulfates | Same as phase I |
1
Analyzed Cu using atomic absorption spectrometry: 15, 149, and 169 mg/kg for treatment 1 to 3 in phase I, and 11, 145, and 160 mg/kg in phase II, respectively.
2
Chelate of one Cu atom coordinated with 2 molecules of 2-hydroxy-4-methylthio butanoic acid (HMTBa).