家畜饲料含钙量丰富 动物饲料最常见钙源是什么

发布时间:2017-08-29 17:17:26   来源:猪ok网   阅读:3054次

A good part of calcium in most feeds remains unaccounted for as it is hard to control the inputs of this cheap mineral.

由于很难控制这种廉价矿物的投入,大多数饲料中钙的很大一部分仍然没有明确

There is much talk going on about calcium in diets for monogastric animals. Too much, and it interferes with other mineral nutrition; not enough, and it will harm productivity. But there is hardly a case where calcium will be found deficient in well-manufactured commercial diets. In fact, every lab analysis comes back almost invariably high in calcium. Have you ever wondered why? Here are the primary reasons:

关于单胃动物饮食中钙的讨论很多。添加量太多,干扰其他矿物营养;添加量不够的,会有损生产力。但是几乎没有发现在制造好的商业饮食中钙不足的情况。事实上,每一次化验分析几乎都是很高的钙含量。你有没有想过为什么?以下是主要原因:

Natural ingredients contain more calcium than accounted for; the reason is explained by the following bullet points.

天然成分含钙量比计算值要多;原因由以下几点说明。

Chemical laboratory analyses have a margin of error 20 percent, plus or minus. This is the accepted norm by most official organizations. So, if your sample is supposed to contain 1 percent calcium, lab results ranging from 0.80 to 1.20 percent calcium are absolutely normal.

化学实验室分析的误差幅度为20上下。这是大多数官方组织所接受的规范。所以,如果您的样本应该含有1%的钙,实验室结果范围从0.801.20%的钙是绝对正常的。

Limestone, the most common source of calcium in all animal diets, is a highly variable ingredient containing an unknown amount (unless analyzed) of calcium ranging from 22 to 38 percent (in theory). The latter is impossible as it refers to pure calcium carbonate.

石灰石是所有动物饲料中最常见的钙源,是一种高度可变的成分,含有22~38%(理论上)的钙含量不等(除非分析)。38含量是不可能的,因为它是指纯碳酸钙。

To make matters worse, limestone is used as a cheap universal carrier for all premixes, as a filler for concentrates and so on. In essence, it is everywhere. Of course, high quality products contain pure calcium carbonate, but this does not negate the fact that they contain calcium, often unaccounted for on the label.

更糟糕的是,石灰石被用作所有预混料的廉价通用载体,作为浓缩物的填料等。实质上,它到处都是。当然,高质量的产品含有纯碳酸钙,但这并不否定它们含有钙的事实,往往在标签上不明显。

Calcium requirements for most animal species have been determined a century ago (OK, at least in the previous century). So, we tend to be overgenerous with safety margins as calcium sources are cheap.

大多数动物物种的钙需求已经在一个世纪前确定了(可以,至少在上个世纪)。所以,由于钙来源很便宜,我们往往超过钙的安全用量范围。

Phytase, a common enzyme, releases calcium, which is often unaccounted for in feed formulation.

Soybean meal, a universal ingredient, is often supplemented with 0.5 to 1.0 percent limestone to increase its flowability.

植酸酶是一种常见的酶,释放出钙,这在饲料配方中往往不可计量。

豆粕是常用原料,通常补充0.5~1.0%的石灰石以增加其流动性。

The above help illustrate the fact that monogastric animals receive a surplus of calcium, a good part of which is often hard to control and remains unaccounted. The only remedy is to test complete diets for calcium and make necessary adjustments. Lamentably, this needs to be done frequently enough, especially when formulas change on a routine basis.

以上说明了单胃动物获得过剩钙的事实,其中很大一部分通常难以控制,并且无法计量。唯一补救的方法是测试饲料中总钙含量并进行必要的调整。可悲的是,这需要经常测量,特别是当配方在日常的基础上改变时。



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