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首页> 外文期刊>Animal Science Journal >Effect of negative dietary cation-anion differences on carcass characteristics and beef tenderness of Japanese Black steers
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Effect of negative dietary cation-anion differences on carcass characteristics and beef tenderness of Japanese Black steers

机译：负膳食阳离子阴离子差异对日本黑色阉牛胴体特征及牛肉柔软的影响

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摘要

Lowering dietary cation-anion differences (DCAD) can enhance responsiveness to Ca-homeostatic hormones and increase Ca availability, which might have potential to activate a Ca-dependent protease, calpain, and to enhance postmortem myofibrillar proteolysis. In this study, we investigated the effects of DCAD manipulation on calpain activity and beef tenderness in Japanese Black cattle which are characterized by their high marbling. Thirty-six Japanese Black steers were allotted to one of two treatments: (i) control (CON; DCAD +6.09 mEq/100g of dry matter (DM)) or (ii) negative DCAD (NEGD; DCAD -8.27 mEq/100g DM) for 70 days before slaughter. Lowering DCAD decreased DM and energy intake (P & 0.01) even though it did not negatively affect the growth performance or carcass characteristics. In NEGD, urine pH was decreased by acidification caused by the negative DCAD (P & 0.01). Calpain activities tended to be improved in NEGD (P = 0.09), but Warner-Bratzler shear force values were not affected by treatment. Although calpain activities tended to improve, lowering DCAD to -8.27 for 70 days before slaughter was insufficient to enhance beef tenderness in Japanese Black steers.
机译：降低膳食阳离子阴离子差异（DCAD）可以增强对CA-OIOSOTATIC激素的反应性，并增加CA可用性，这可能有可能激活CA依赖性蛋白酶，CALPAIN和增强后蛋白质纤维素蛋白水解。在这项研究中，我们调查了DCAD操纵对日本黑牛酸盐活性和牛肉温柔的影响，这些黑色牛的特征在于他们的高层大理石。分配了三十六个日本黑色阉牛：（i）控制（CON; DCAD +6.09 MEQ / 100g干物质（DM））或（ii）负DCAD（NEGD; DCAD -8.27 MEQ / 100G DM ）屠宰前70天。降低DCAD降低了DM和能量摄入量（P＆amp; 0.01），即使它没有对生长性能或胴体特性产生负面影响。在NegD中，通过阴性DCAD引起的酸化降低了尿pH（P＆amp; 0.01）。 Calpain活动往往在Negd（P = 0.09）中得到改善，但华纳 - 布拉茨勒剪切力值不受治疗的影响。虽然CALPAIN活动趋于改善，但在屠宰前70天将DCAD降至-8.27，以提高日本黑色阉牛的牛肉温柔。

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