Studies with Sudangrass. I. Effect of Growth Stage and Level of Nitrogen Fertilizer Upon Yield of Dry Matter; Estimated Digestibility of Energy, Dry Matter and Protein; Amino Acid Composition; and Prussic Acid Potential<sup>1</sup>

Jung, G. A.; Lilly, B.; Shih, S. C.; Reid, Richard

doi:10.2134/agronj1964.00021962005600060004x

Cited by 18 publications

(12 citation statements)

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“…Second harvest CP also increased with N fertilization. The increasing trend in CP with N fertilization is similar to observations of other researchers (10,11). Although a significant rate × timing interaction occurred for the second harvest, overall differences between the single and split application were relatively small (Fig.…”

Section: Nitrogen Fertilizer Rate and Application Timing Effects On Nsupporting

confidence: 91%

Nitrogen Fertilization Rate and Application Timing Effects on the Nutritive Value and Digestibility of Crabgrass

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Fike

Tilson

2005

Forage & Grazinglands

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Crabgrass (Digitaria species) could provide high quality grazing for ruminant livestock in the mid‐Atlantic region of the United States. However, little is known about managing crabgrass as forage in this region. This study was designed to evaluate the effect of N fertilizer rate and application timing on the nutritive value of crabgrass. Nitrogen rates ranging from 0 to 400 lb/acre were applied as a single application at seeding or as a split application, one‐half at seeding and one‐half after the first cutting. Crude protein concentration increased with N fertilization. In contrast, the effect of N fertilization on crabgrass fiber digestibility was variable and appeared to be linked to weather patterns and other factors. Results of the current study clearly indicate that crabgrass is highly digestible, possessing IVTD values in the range of 75 to 90%. Crabgrass could provide excellent quality forage during the summer months when cool‐season grass growth is restricted by high temperature and intermittent rainfall. This species would likely be best for livestock classes with high nutritional requirements such as weaned calves, stockers, or lactating dairy cattle.

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Section: Nitrogen Fertilizer Rate and Application Timing Effects On Nsupporting

confidence: 91%

Nitrogen Fertilization Rate and Application Timing Effects on the Nutritive Value and Digestibility of Crabgrass

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Fike

Tilson

2005

Forage & Grazinglands

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“…Nitrogen fertilization in the range of 200 to 300 kg ha −1 has increased dry matter production and CP content of commonly used summer–annual grasses in several studies (Jung et al, 1964; Hart and Burton, 1965; Sumner et al, 1965; Edwards, 1966). In the current study, maximum dry matter yield was obtained at rates >300 kg N ha −1 in years with abundant early season rainfall.…”

Section: Resultsmentioning

confidence: 99%

Yield, Digestibility, and Nutritive Value of Crabgrass as Impacted by Nitrogen Fertilization Rate and Source

2005

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nomical N source for crabgrass grown as forage. Although crabgrass is already a component of many cool-Crabgrass (Digitaria spp.), a summer annual grass capable of self and warm-season pastures in the upper south of the reseeding, could provide high quality grazing, but little is known about USA (Burns et al., 2004), limited research has evaluated its management in the mid-Atlantic region. This study evaluated the its potential as summer forage. In addition, no informaeffects of N fertilizer rates and sources on crabgrass yield and nutritive value. Plots were established in late spring of 2001-2003 near Black-tion is available on the productivity or management of stone, VA. The experimental design was a randomized complete block improved crabgrass in this region. This study was dewith a factorial treatment arrangement and four replications. Nitrogen signed to evaluate the effect of N fertilization rate and rates ranging from 0 to 336 kg ha Ϫ1 were applied in 56-kg intervals source on the yield, nutritive value, and digestibility of at seeding as ammonium nitrate (NH 4 NO 3 ) or broiler litter. Plots improved crabgrass forage. were harvested twice in 2001 and three times in 2002 and 2003. Yield increased with N rate for all harvests. Over years and N sources, MATERIALS AND METHODS seasonal yield ranged from 4.2 to 9.8 Mg ha Ϫ1 . Maximum yield occurred at 300 kg N ha Ϫ1 . Nitrogen source had little effect on yield 'Red River' crabgrass [Digitaria ciliaris (Retz.) Koel.] was but dramatically impacted forage nitrate levels. Over years and N sources mean in vitro true digestibility (IVTD) for first, second, and near Blackstone, VA. The soil series was a Wedowee sandy final harvests were 880, 871, and 786 g kg Ϫ1 . In 2001 and 2003, first loam. Initial soil nutrient levels are shown in Table 1. A conharvest IVTD was negatively correlated with N rate, but positively ventional seedbed was prepared by plowing, disking, and field related at second harvest. Nitrogen source had little effect on IVTD.cultivating, and plots were seeded using a cultipacker type Over years, N rates, and N sources, CP concentrations at first, second, seeder and a seeding rate of 6.7 kg ha Ϫ1 . Nitrogen was applied and final harvests were 105, 105, and 76 g kg Ϫ1 . These data indicate at 0, 56, 112, 168, 224, 280, and 336 kg plant-available N ha Ϫ1 that crabgrass is a productive and nutritious forage, and that readily as a single application of either NH 4 NO 3 or broiler litter. available organic N sources such as broiler litter could be effectivelyNitrogen treatments were applied at seeding and incorporated utilized for its production. ).in each year, when plants were allowed to reach seed maturity. A 1.2-m-wide strip was cut through the center of each plot Published in Agron.

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“…With other warm‐season annual grasses, N fertilization in the range of 180 to 265 lb/acre increased dry matter production and crude protein (4,6,7,8). In the current study, maximum dry matter yield of crabgrass was obtained when more than 300 lb of N per acre was applied with normal rainfall.…”

Section: Nitrogen Management For Crabgrassmentioning

confidence: 99%

Nitrogen Fertilization Rate and Application Timing Effects on the Yield of Crabgrass

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Fike

Groover³

et al. 2005

Forage & Grazinglands

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Crabgrass (Digitaria species) is a summer annual grass that could provide high quality grazing for ruminant livestock in the mid‐Atlantic region of the United States. However, little is known about managing crabgrass as a forage in this region. This study was designed to evaluate the effect of N fertilizer rate and application timing on the yield of crabgrass. Nine N rates ranging from 0 to 400 lb/acre were applied as a single application at seeding or as a split application, one‐half at seeding and one‐half after the first cutting. Averaged over years, first harvest yield ranged from 800 to 4000 lb/acre and increased as N rate increased with maximum dry matter production occurring at 255 lb of N per acre. Second harvest yield was greatest when N was applied as a split application. This effect was most pronounced with ample rainfall. Total dry matter production, averaged over years, ranged from 3000 to 9000 lb/acre and increased as N rate increased with maximum dry matter production occurring at 305 lb of N per acre. Results support current recommendations for summer annual grasses of applying N at 60 to 80 lb/acre at seeding followed by N at 40 to 60 lb/acre after each harvest and suggest that crabgrass could be managed in a similar manner.

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Studies with Sudangrass. I. Effect of Growth Stage and Level of Nitrogen Fertilizer Upon Yield of Dry Matter; Estimated Digestibility of Energy, Dry Matter and Protein; Amino Acid Composition; and Prussic Acid Potential¹

Cited by 18 publications

References 11 publications

Nitrogen Fertilization Rate and Application Timing Effects on the Nutritive Value and Digestibility of Crabgrass

Nitrogen Fertilization Rate and Application Timing Effects on the Nutritive Value and Digestibility of Crabgrass

Yield, Digestibility, and Nutritive Value of Crabgrass as Impacted by Nitrogen Fertilization Rate and Source

Nitrogen Fertilization Rate and Application Timing Effects on the Yield of Crabgrass

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Studies with Sudangrass. I. Effect of Growth Stage and Level of Nitrogen Fertilizer Upon Yield of Dry Matter; Estimated Digestibility of Energy, Dry Matter and Protein; Amino Acid Composition; and Prussic Acid Potential1

Cited by 18 publications

References 11 publications

Nitrogen Fertilization Rate and Application Timing Effects on the Nutritive Value and Digestibility of Crabgrass

Nitrogen Fertilization Rate and Application Timing Effects on the Nutritive Value and Digestibility of Crabgrass

Yield, Digestibility, and Nutritive Value of Crabgrass as Impacted by Nitrogen Fertilization Rate and Source

Nitrogen Fertilization Rate and Application Timing Effects on the Yield of Crabgrass

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Studies with Sudangrass. I. Effect of Growth Stage and Level of Nitrogen Fertilizer Upon Yield of Dry Matter; Estimated Digestibility of Energy, Dry Matter and Protein; Amino Acid Composition; and Prussic Acid Potential¹