How is dry matter determined?

Article by: Ona Jasso | 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.

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.

Why is dry matter important?

Dry matter intake (DMI) is important in bovine nutrition, especially in grazing animals, since it establishes the amount of nutrients available for animal health, reproduction and production (NRC, 2001).

What is dry matter yield?

Dry matter yield (RMS) per plant (g); It was calculated by adding the dry weight per plant plus the dry weight of the stems and leaf blades used to calculate the leaf:stem ratio.

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What is green matter?

Piles of organic waste that generate Greenhouse Gases.

What is better green or dry grass?

From the point of view of González Covarrubias, it is best to offer the animal dry, dehydrated grass, since in this way more benefits are obtained from the concentration of nutrients and a greater stimulation of rumination, in addition to having better digestibility compared to with green grass.

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

How much grass can 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 to calculate the green matter?


If we wanted to speak in Green Weight or Green/Fresh Matter, we simply multiply by 40 the value of Fresh Forage Weight obtained in the cut: Example: 250 gx 40 = 10000 kg MF/ha (kg Fresh Matter or Green Weight per hectare).

How is the stocking rate calculated?

To calculate the stock, the number of animals in each category of the stock is multiplied by their livestock equivalence and then added to arrive at the total UG in the field. To obtain the endowment, this value is divided by the grazing area in hectares (ha).

How to calculate the forage base?

If you want to know the requirement of an animal based on fresh or green forage, you must first know the percentage of moisture of the forage species used. For example, a kilo of grass has 75% moisture and 25% dry matter; therefore, each kg of forage would have 0.75 kg of moisture and 0.25 kg DM.

How to calculate forage supply?

The forage supply per hectare can be calculated from the daily growth of the pasture and the energy concentration of the forage. Livestock demand is obtained by multiplying the average daily requirements of the herd by the stocking rate.

How much grass does a cow eat?

In this case, the total feed consumption (wet basis) would be 11.25 kg/animal/day, of which 85% would be concentrate and 15% forage, that is, 9.56 kg of concentrate and 1.69 kg of dry forage that can be any hay and dry fodder.

How much food does a cow eat per day?

-How much does a cow eat a day? -They ingest about 24 kilos of dry matter and drink between 150 and 200 liters of water, depending on how hot it is.

How many square meters of grass does a cow need?

Regarding the expense of resources, One Green Planet explains that a cow fed with the industrial system needs about 12,000 square meters of land, while a cow fed exclusively with grass will need about 36,000 square meters of land.

What is the best forage for free range cows?

“Grass is the cheapest fodder for the farmer and the best for the cow”

What is the best forage?

Oat hay is one of the most widely used forages. This is because it is very good for digestion. It must be complemented with supplements (calcium, proteins, vitamins…), it contains less than alfalfa. It is not usually recommended at the time of gestation of the mare or growth of the foals.

What is the difference between pasture and forage?

Grass are herbaceous plants that grow in the paddock and are used to feed livestock, while forage is harvested to be fed to animals, whether green, dry or processed (hay, silage, stubble, sacharina, ammonification ).

How is the dry weight of a plant measured?

To obtain the total dry weight, including the ears, convert the total fresh weight (TFP) to total dry weight (PST; kg) as follows: PST=PFT*MST%. Calculate dry matter per unit area (ton ha-1) as follows, PS*10/PA.

What percentage of dry matter does alfalfa have?

At the beginning of flowering, when the plant must be cut, the percentage of dry matter in alfalfa is approximately 20%, only surpassed by forage crops such as corn, sorghum or Sudan grass, which have a in dry matter from 26 to 28% (Gómez de Barreda, 2005).

What is the dry matter of forages?

Dry matter (DM) represents the total weight of a food minus its water content; that content is expressed as a percentage. For example, a pasture with 20% DM contains 20 grams of DM per 100 grams of fresh pasture.

What does the dry matter content mean in avocado?

The dry matter is the solids that remain after the dehydration of the avocado pulp (technically, the aim is to extract as much free water as possible from the sample).

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