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Is Soybean Stubble Good Cattle Feed?

By   /  January 20, 2020  /  1 Comment

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After soybeans are harvested, cows sometimes are put out on the residues to graze. Some bean residues are even baled. But how good is this feed?

Don’t be misled into thinking soybean residues are as good or better than corn stalks. Photo by Troy Walz

 

We’re all familiar with the usefulness of grazing corn stalks, but I see more and more residue from soybean fields grazed every year. Cows seem to like licking up what’s left behind after combining. But frankly, I’m a little concerned that some folks may think their cows are getting more from those soybean residues than what truly is there.

The problem is a matter of perception. When most of us think of soybeans, we think high protein so we expect soybean residues will be a high protein feed, too. Unfortunately, the opposite is true; soybean residue is very low in protein.

Soybean stems and pods contain only about 4 to 6 percent crude protein, well below the 7 to 8 percent needed for minimum support of a dry beef cow. Even though leaves can be up to 12 percent protein, it’s only around one-third digestible, so that’s not much help. In fact, protein digestibility is low in all bean residues.

Energy is even worse. TDN averages between 35 and 45 percent for leaves, stems, and pods. This is even lower than wheat straw. As a result, cows fed only bean residue can lose weight and condition very quickly. Heavy supplementation is needed to maintain cow health.

Thanks to UNL BeefWatch for this article. If you like Podcasts, check out their Podcast page here.

This doesn’t mean soybean residues are worthless for grazing or even baled. They can be a good extender of much higher quality hay or silage. However, cattle must be fed quite a bit of higher energy and protein feeds to make up for the deficiencies in soybean residues.

Don’t be misled into thinking bean residues are as good or better than corn stalks. Otherwise, you and your cows will suffer the consequences.

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  • Published: 8 months ago on January 20, 2020
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  • Last Modified: January 15, 2020 @ 11:13 am
  • Filed Under: Livestock

About the author

Bruce is a professor of agronomy and extension forage specialist at the University of Nebraska-Lincoln. He works with grazing systems and does research on annual forages, utilization of warm-season grasses, forage quality in hay and pasture systems and using legumes to improve pastures.

1 Comment

  1. Mike Wallace says:

    Sheep have the ability to pick up the shelled-out beans in soybean stubble field that cattle cannot.

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