How is dry matter calculated?

Article by: Diana Arreola | Last update: April 10, 2022
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Dry matter is measured in the laboratory; To do this, a dosed sample is taken from the solid mixture – sometimes called fresh matter – and heated in the drying room above 100 °C so that the residual moisture (mostly water) evaporates.

How is dry matter calculated?

%MS = [(peso inicial – peso seco) / peso inicial]

So if the initial weight was 100 grams and the dry weight was 34, the formula would be the following: 100-[(100-34)/100] X 100 = 34% DM.

What is dry matter?

It is the part that remains of a material after extracting all the water possible through heating done under laboratory conditions, a notion used mainly in biology and agriculture.

What is dry matter and how does it break down?

In the digestion process, the dry matter of the feed is broken down into ash and organic matter, which in turn is broken down into fat, protein, and carbohydrates. From these come sugar, starches and fiber, from which pectins, cellulose, hemicellulose and lignin are obtained.

What is dry matter for cattle?

Dry matter, DM, is the feed (forage) from which the water has been removed. Its main function is to nourish the rumen bacteria to produce meat or milk. DM consumption depends on the weight and age of the animal.

16 related questions found

How many kilos of dry matter does a steer eat by weight?

At a younger age, the cattle consume less dry matter and for every 100 Kg of weight, the animal should eat a dry matter equivalent of 1.8 to 3.5 Kg, that is, from 1.8 to 3.5% of live weight. A cow in milk production should consume an average of 3.2%, an adult cow between 3.3% or 3.4% and a heifer 2.8%.

How many kilos of dry matter does a cow eat?

A high-producing cow weighing 600 to 700 kg has to eat 23 to 26 kg of dry matter per day.

How many kilos of food does a cow eat?

In summary, in an approximate calculation, cattle consume 70% forage and 30% concentrate. Applying the formula, a cow that weighs 300 kg and produces 20 liters of milk should consume 11 kg of DM, of which 7.7 kg must be grass and 3.3 must be concentrated supplements.

How many kilos of food does a cow eat a day?

All the cows receive about 4.5 kilos of feed daily -about 150 grams per liter of milk-, both in lactation and dry, “because in this livestock farming it is rather a complement to the main source of food, which is grass”, Louis assures.

How many kilos of manure does a cow produce per day?

The adult bovine defecates 10 to 15 times a day, covering 1 – 1.5 m2, generating 20 – 30 kg/day, and can rise up to 45 kg.

How much does a steer eat per day?

The recommended general rule of thumb for feeding steers daily is to feed 2-3% (dry basis) of the live weight of the animal. A 270 kg steer. he is expected to consume 5-8 kg. of dry matter.

What is the percentage of dry matter that a cow consumes per day according to its live weight?

Dry matter intake in feedlot bulls can vary between 2.7.0% (the first 15 to 20 days of fattening) to 3.5% of the live weight (from 21 days to finishing).

How to calculate the dry matter of grass?


Example: Weight of green forage (PV) ex. = 100 g Weight of dry forage (PS) ex. =20 g (After microwave drying) Operation = (PS/PV) x 100 —> 20 g / 100 gx 100 = 20 % DM, therefore 80 % of Water in the forage.

How many kilos of feed does a steer consume?

A steer eats 2.6 to 2.8% of its weight. The adequate weight gain is 1.2 to 1.5 kg/day. An animal in a feedlot requires between 100 and 150 days, depending on its initial conditions. In general, a steer of 250 Kg.

How long does it take to fatten a steer?

Pastoral wintering demands a long time for fattening steers (12 to 24 months).

How many kilos of corn does a steer eat?

To produce 450 kg of a steer, 700 kg of corn are required as an average country. That implies 1.5 kg of corn for every kg of meat produced. Much less than pork (3.5 kg average) and chicken (2 kg average).

How does a cow defecate?

Defecation can occur both with the animal walking and with the animal lying down, it is normal for it to happen while standing. There is a typical posture: the base of the tail is raised and arched away from the body, the hind legs are placed slightly forward and apart, and the back is arched.

How to make a cow defecate?

Resumption of free access to good quality water, rest, and hay or straw will usually resolve constipation after a few days to a week. To prevent it, regular and frequent access to good quality water, food and rest must be guaranteed.

What produces cow manure?

Anaerobic digestion of manure produces gases that are mostly methane (60%), carbon dioxide (39%), and traces (0.2%) of nitrous oxide (Bekkering et al., 2010). Methane is a non-toxic gas, a biogas that contributes significantly to the greenhouse effect.

What can be done with cow manure?

Cow manure for compost

They can be composted by themselves or used as structuring agents for other organic waste that is more unbalanced in carbon and nitrogen. They serve to balance the C/N ratio, provide microorganisms, organic matter and physical structure to the mixture.

What to give a cow that cannot defecate?

In the event that the alteration has been caused by anaplasmosis, he argued that rumination should be stimulated with more fibrous foods, such as grasses or hay. He added that when it occurs due to movement of the abomasum, the treatment is purely surgical.

What to do if a cow won’t stand up?

Treatment: Provide comfortable bedding, food and water on site. Change the position of the cow every 2 or 3 hours and massage it to activate the circulation of the muscles until muscle activity is restored.

What happens when a cow doesn’t stop?

When a cow is unable to get up for more than 24 hours after initial recumbency, secondary recumbency occurs, hence the name of this condition. This mainly occurs due to the fact that there will be considerable pressure on the muscles and nerves.

How many times does a cow urinate?

He commented that when an animal is in good hydration conditions, it tends to secrete liquid frequently, on average 10 times a day.

How much corn silo does a steer eat?

According to the expert, producers receive silo bags between 40 and 50 kg, either commercialized or as a donation from the Government. In general terms, each bag is a daily ration for 3 cattle, taking into account that each animal consumes 15 kg.

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