Re: Cereal Grains - November 02nd Oats/Rye Frosts
It's been nearly a week since temps dropped to 23 degrees here in SE Iowa...what do our oats look like now? 23 degrees is pretty darn cold! A pretty serious freeze I would say...was it enough to nuke our plain old everyday run of the mill inexpensive Jerry oats?
Nope...
Both the Jerry oats ($16 for 64#'s) and BFO ($34 for 50#'s) still look the same... /forum/images/%%GRAEMLIN_URL%%/cool.gif
Jerry on the right BFO on the left
These oats have been hit by several frosts and several freezes...
BFO Left Jerry Right
I've already showed closeups that deer had been hammering the Jerry oats but scarcely touching the BFO's and now we know it takes more then a few nights of temps in the 20's to kill everyday oats.
At this point deer are grazing the rye to the ground and showing less interest in either of the oats, which...is why I mix oats and rye! The combination is a can't fail, never miss combo that will last all season....
but...hold on... /forum/images/%%GRAEMLIN_URL%%/smirk.gif
I always get some argument from those that happen to sell certain products that their oats are better then rye because....they (claim) to be higher in protein.
Being an old dairymen it's pretty hard to buffalo me because I understand forage testing and I believe university test versus what a seed salesmen tells me.... /forum/images/%%GRAEMLIN_URL%%/wink.gif
So here are the hard cold facts on nutritive values of oats versus rye.
NDF, ADF and IVOMD is higher in oats then rye. What you say?? What on earth do those things mean??
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">
Neutral detergent fiber (NDF)The insoluble portion of the forage (neutral detergent fiber) contains the cellulose, hemicellulose, lignin and silica. It is commonly referred to as the cell wall fraction.
Neutral detergent fiber has been shown to be negatively correlated with dry matter intake. In other words, as the NDF in forages increases, animals will be able to consume less forage. NDF increases with the advancing maturity of forages. A better prediction of forage intake can be made using NDF; therefore, better rations can be formulated.
Acid Detergent Fiber (ADF)
Acid detergent fiber is the portion of the forage that remains after treatment with a detergent under acid conditions. It includes the cellulose, lignin and silica.
Acid detergent fiber is important because it has been shown to be
negatively correlated with how digestible a forage may be when fed. As the ADF increases, the forage becomes
less digestible
In Vitro Organic Matter Digestibility (IVOMD)
in vitro (in glass or in test tube) procedures are seldom used for farm forage analysis. They are, however, commonly used by scientists to evaluate forage quality.
Most often, dry matter disappearance in a specific period of time is measured and this value will indicate how digestible a forage may be. The term in situ (in bag) may be used to describe the procedure where small nylon bags containing samples of forage are placed in the rumen of live animals consuming similar diets to the forage being evaluated.
This is done through a sealed external opening into the rumen of an animal, called a canula.
In vitro is usually a two-step procedure done in test tubes. First the forage sample is digested using rumen fluid from a donor animal to simulate rumen digestion. The sample is then digested in an enzyme solution to simulate digestion in the small intestine. Both in situ and in vitro are excellent techniques for forage evaluation when more expensive and time-consuming digestion or feeding trials are not possible.
Digestion trials are an excellent way to evaluate forages or other feeds for nutrient availability. In this procedure, the forage is fed to several animals. The amount of forage fed and feces produced in a 10 to 14 day period is recorded and sampled for analysis.
Because an analysis can be done on both the feed and the feces, it is possible to determine the digestibility for each nutrient in the feed. For example, the protein digestibility could calculate to be 75 percent digestible while the cell wall fractions may only be 59 percent digestible
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The in vitro thing is pretty cool because they have cows with glass covers over and opening in their stomach...just reach in and get a "sample"... /forum/images/%%GRAEMLIN_URL%%/grin.gif
Anyway....the gist of it is this, regardless of what the crude protein level is, the undigestable part can lower the
Relative Feed Value (RFV)
In universty tests I have seen rye tested higher in CP regardless but further testing also reveals that oats have lower digestability due to
higher levels of NDF, ADF and IVOMD
and lower crude protein even before factoring in the NDF!!
Catching all of that?? /forum/images/%%GRAEMLIN_URL%%/confused.gif /forum/images/%%GRAEMLIN_URL%%/grin.gif
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Rye contained less (P<0.05) NDF than all other forages.
oat had the highest average NDF content (P<0.05), but there were no differences (P>0.05) among other forages.
</div></div>
In summary, rye will have higher Relative Feed Value (RFV) then oats but...
so what?
My take on feed value in the fall is that it's pretty much a moot point!
Horns are already developed, fawns being weaned and deer have a cornucopia of food sources. On top of this they know...they know what they need, they don't need any testing to know what they should eat.
They will pick the food sources near them that are high in protein and energy and that are highly digestable at the same time. Livestock are fenced and they have little or no choice, so we endeavor to feed them the very best so they will gain faster or produce more milk.
I'm sharing all of this with you so you can sort out the facts from the B.S. when a salesmen or fancy ad has you wondering.
Deer right now are hammering my rye over oats and alfalfa more then anything else...they don't need me or a fancy ad to tell them what they need. /forum/images/%%GRAEMLIN_URL%%/smile.gif
The following links will further explain and help you and help you sort through the hype...
Forage Nutrition for Ruminants
Nutritive value of fall-grown cereal-grain forages
Yield and Quality of Small Grains
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Harvesting Florida 401
rye and Sunland
triticale at the boot stage averaged <span style="color: #FF0000">14% crude protein </span>whereas, the
oats and wheat averaged <span style="color: #FF0000">10 to 11% crude protein </span>at the same stage.
Digestibility was also excellent for all small grains when harvested at the boot stage averaging 78% for triticale, 72% for rye and wheat and 67% for oats. </div></div>
I don't sell seed...just share facts.... rye will out perform oats and regular spring oats are more attractive and a better value then the tested winter hardy oat /forum/images/%%GRAEMLIN_URL%%/wink.gif
<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Do I get some kind of Agronomy Degree ?!!? </div></div>
We'll allow Skip to make up class after deer season... /forum/images/%%GRAEMLIN_URL%%/grin.gif
