Overview
Luo and colleagues fed growing black goats a pelleted diet that was half rice straw, using either ordinary straw (diet cadmium 0.38 mg/kg dry matter) or straw from cadmium-contaminated farmland (1.61 mg/kg) for 90 days. Cadmium was measured by ICP-MS in four muscle cuts and in organs at baseline and after 30, 60 and 90 days. Muscle cadmium rose with the contaminated diet but stayed below the Chinese limit of 0.1 mg/kg.
Key numbers
- Picnic shoulder at 90 days: 56.67 µg/kg on the contaminated diet versus 23.25 µg/kg on the control diet (Table 7, p. 9).
- Hindquarter at 90 days: 46.70 versus 13.94 µg/kg (Table 7, p. 9).
- Longissimus dorsi peaked at 24.71 µg/kg at 60 days on the contaminated diet (Table 7, p. 9).
- Kidney 78.67 µg/kg and liver 75.27 µg/kg at 90 days on the contaminated diet; these organs are noted only, not recorded as meat findings (Table 7, p. 9).
Methods (brief)
About 0.20 g of frozen tissue was digested with nitric acid in a microwave system and cadmium was read by ICP-MS (Agilent 7900) at a contract laboratory. Values are means of six goats with a pooled SEM. The paper does not state whether results are on a fresh or dry basis.
Evidence Fitness
This is a controlled feeding trial (site_context experimental), not a survey of meat sold in markets, so the values show how diet affects cadmium in goat meat rather than what consumers buy. Six animals per group at each time point. The paper reports no limit of detection, reference material or recovery, and does not state the weight basis. Muscle cut names in the methods (foreshank, hindshank) differ from those in Table 7 (picnic shoulder, hindquarter).