Rebecca Kern for Progressive Forage
Brown midrib (BMR) or low-lignin varieties of sorghum, sudan, millet and hybrid crosses have been commercially available since the 1990s. However, I still receive questions (and opinions) from livestock producers regarding claims that BMR varieties improve animal performance relative to their non-BMR counterparts. Some buy in wholeheartedly, attesting to improved intake and body condition; others say they have not seen the benefits.
To examine these differences, I have pulled together a set of over 2,000 hay samples submitted to our laboratory from Nebraska and surrounding states. The species included are sorghums, millets, sudans, and sudex hybrid crosses. Because this data comes from a commercial laboratory, and we only have the information producers provide us, we are comparing BMR varieties to samples submitted with unknown BMR status. There are BMR varieties in the unknown population, and our findings are more subtle than if we compared them to non-BMR varieties. Table 1 summarizes nutritional values of the samples measured with NIRS Forage and Feed Testing Consortium calibrations.
Do BMR forage varieties really perform as advertised?
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