As long as the hay is cured correctly it is rare for it to contain toxic levels of prussic acid. Chopping increases nematicidal potential. Photo: T. Baugher, Penn State. Sudangrass, forage sorghum, and sorghum-sudan hybrids will tolerate moderate levels of atrazine. Unlike forage sorghum, sorghum x sudangrass hybrids will regrow the following harvest by cutting or grazing. Rotary or bidirectional head type corn choppers can harvest sorghum planted in any row width. Sudangrass (Sorghum sudanense, formerly classified as S. vulgare var. Green chop - Sudangrass and sorghum-sudangrass hybrids can be used to provide green chopped forage over summer. Immediately incorporate the sorghum-sudangrass. Up to 6' high. We stock organic seed when we can and conventional seed when we must. The closer growers can get dry matter levels to the ideal (32 to 36 percent), the more reduction in the amount of leachate (liquid silage runoff) produced. Sorghum-sudangrass: For the best quality and yield under a multi-cut program, harvest at 40 days or 40 inches of growth, whichever comes first. The danger of poisoning is highest in the early growth stages and following a light frost. As long as the hay is cured correctly it is rare for it to contain toxic levels of prussic acid. Prussic acid (hydrogen cyanide) poisoning can occur when the sorghum species (forage sorghum, sorghum-sudangrass, sudangrass, and Johnsongrass) are frosted. Add to cart. Sorghum-sudangrass hybrids have higher stalks than sudangrass and are normally harvested for green chop or silage but may be used for pasture or hay if chilled at a high seeding rate and harvested at immature stages (18 to 24 in. Do not graze wilted plants or plants with young tillers. Sorghum × sudangrass are not suitable for hay because of the thickness of their stems, which are difficult to cure or to crush and crimp. Sorghum Sudangrass is a warm-season annual grass developed as a hybrid cross between forage sorghum and sudangrass. Mechanical harvesters should be set to leave 2 nodes or 6 inches of stubble, whichever is higher. Under less frequent cutting, they are more vigorous. We have direct-chopped sorghum, sorghum sudan, sudangrass and pearl millet. Flail-chopping sorghum-Sudangrass Chopped residue ready for incorporation Prussic acid poisoning is a concern if you plan on feeding these crops to livestock. Pest Management . Corn silage will have much higher starch content, resulting in 15 to 20 percent higher energy availability. Mow sudangrass about a month after planting, when stalks are 3 to 4 feet tall. It is commonly used as a versatile forage option for grazing, hay, or silage. Yields have ranged from 3 to 5 tons/A dry matter. At the latest, harvest when 50 percent of the plants have reached the flag leaf stage. Weeds. Also called: Sudex, Sudax Type: summer annual grass Roles: soil builder, weed and nematode suppressor, subsoil loosener Mix with: buckwheat, sesbania, sunnhemp, forage soybeans or cowpeas Sorghum-sudangrass hybrids are unrivaled for adding organic matter to worn-out soils. Green-chopping frost-damaged plants will lower the risk compared with grazing directly, because animals are less likely to selectively graze damaged tissue. Chopping length is usually longer than for corn silage, varying from 0.75 to 1 inch or more, using sharp knives. Forage sorghums may not be safe for grazing or green chopping until after they are headed. Great for dairy, heifer, dry cows. One hundred pounds of nitrogen is recommended at planting and a second application of 100 pounds of nitrogen following first cutting is recommended for high yield potential. Sorghum-sudangrass hybrids with the brown midrib (BMR) gene will produce forage with higher fiber digestibility, making it more like corn silage. It can be ready for harvest as early as 45 days after planting. Green-chopping frost-damaged plants will lower the risk compared with grazing directly, because animals are less likely to selectively graze damaged tissue. (See page 97 in the 2013 Guide.) SP4105 is a photoperiod sensitive, BMR sorghum x sudangrass hybrid that will produce excellent yields and high-quality summer forage for fast weight gain and/or increased milk production. The cultivation of catch crops after early harvested crops represents a good possibility for the cultivation of energy crops, but presupposes a harvesting yield in only a few months of vegetation (<4 months). Sweet six has a dry stalk trait which improves dry down time after cuttings. Harvesting at this height will promote more rapid re-growth. While straight sorghum has the highest potential for poisoning, and straight sudangrass, the least, sorghum-sudangrass has the potential to lean either way. 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