Home » Uncategorized » First hollow stem is here

First hollow stem is here

About Me

David Marburger

David Marburger

Since April 2016, I have served as the Small Grains Extension Specialist at Oklahoma State University. My research and extension efforts focus on delivering science-based recommendations in order to increase small grains production and profitability for stakeholders throughout Oklahoma and the southern Great Plains.

View Full Profile →

Enter your email address to follow this blog and receive notifications of new posts by email.

Join 1,956 other followers

First hollow stem occurs just prior to jointing and is the optimal time to remove cattle from wheat pasture. Grazing past first hollow stem can reduce wheat grain yield by as much as 5% per day and the added cattle gains are not enough to offset the value of the reduced wheat yield. Checking for first hollow stem is fairly easy.

  • You must check first hollow stem in a nongrazed area of the same variety and planting date. Variety can affect date of first hollow stem by as much as three weeks and planting date can affect it even more.
  • Dig or pull up a few plants and split the largest tiller longitudinally (lengthways) and measure the amount of hollow stem present below the developing grain head. You must dig plants because at this stage the developing grain head may still be below the soil surface.
  • If there is 1.5 cm of hollow stem present (see picture below), it is time to remove cattle. 1.5 cm is about the same as the diameter of a dime.
  • Detailed information on first hollow stem can be found at www.wheat.okstate.edu under ‘wheat management’ then ‘grazing’

 

 

  • Image

We check for first hollow stem in our forage trials each year. These can be used as rules of thumb, but you will still need to check your own fields. Our Chickasha plots were sown September 20, 2012 and have had fair growing conditions. First hollow stem was measured on February 18, 2013 and the results are presented in the table below. Gallagher and Everest are just past first hollow stem and Razor is not far behind. I predict that most varieties will be past first hollow stem by March 1.

Variety Hollow stem* 02/18/13
—cm—
Jagger 0.9
Endurance 0.4
Deliver 0.3
Pete 0.0
Ruby Lee 0.7
Garrison 0.5
Duster 0.4
Gallagher 1.7
Iba 0.3
Fuller 0.5
Everest 2.1
Jackpot 0.6
Doans 0.1
Greer 0.4
CJ 0.2
Razor 1.4
Armour 0.5
WB-Cedar 0.5
WB-Redhawk 0.6
T153 0.9
T154 0.4
T158 0.0
OK08328 0.0
*Average of ten hollow stem measurements in wheat sown 09/20/12 at Chickasha, OK

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: