Digestible Dry Matter, Crude Protein, and Dry Matter Yields of Grazing‐Type Sorghum Cultivars as Affected by Harvest Frequency<sup>1</sup>

Wedin, W. F.

doi:10.2134/agronj1970.00021962006200030015x

Cited by 13 publications

(8 citation statements)

References 7 publications

(10 reference statements)

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“…Furthermore, the 3-weekly cutting intervals and the split application of nitrogen at the rate of 50 kg ha"' after each cutting might have also contributed to the high crude protein levels and the non-significant differences in crude protein content among the cultivars. This is in agreement with the findings of SuMNER et al (1965), HART and BURTON (1965), WEDIN (1970) and FERRARIS and NOR- MAN (1973) that cutting or grazing frequently during periods of rapid growth and split application of nitrogen maximized the effect on crude protein yields and ensured a more uniform distribution throughout the season.…”

Section: Crude Proteinsupporting

confidence: 92%

Evaluation of the Forage Potentials of Pearl Millet in a Semi‐arid Tropical Environment

Makeri

Ugherughe

1992

J Agronomy Crop Science

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The pastures and rangelands of the semi‐arid region of Nigeria wherein is the bulk of the livestock in the country, provide sufficient nutrients for livestock for no more than three to five months of the year. There is therefore need to have high yielding and good quality forages to ensure adequate all‐year‐round forage supply for the livestock. The objective of this study was to evaluate the forage potentials of pearl millet (Pennistetum americanum [L.] K. Schum.) which is well adapted to the region. Twenty cultivars were evaluated for their growth, forage yield and mineral content potentials. The cultivars were significantly different in the number of leaves per plant, plant height, dry matter yield and potassium content in each cutting. Differences in crude protein and crude fibre contents were significant only between cuttings. Variations in crude protein and crude fibre contents ranged from 14.1 to 20.3 % and from 28 to 30.8 %, respectively. Cultivars had a progressive dimunition in growth, yield and mineral content potentials after the first or second cutting. Pearl millet therefore seems less suited to forage production in the semi‐arid region of Nigeria since no cultivar showed the potentials for adequate supply of all‐year‐round forage.

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Section: Crude Proteinsupporting

confidence: 92%

Evaluation of the Forage Potentials of Pearl Millet in a Semi‐arid Tropical Environment

Makeri

Ugherughe

1992

J Agronomy Crop Science

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“…Sudax SX-11 is somewhat coarser-stemmed than Trudan. The response to cutting height reflected this morphological characteristic, which has been reported for these and other cultivars (5,13). The 75-to-2.5 Sudax SX-11 plants produced less than those with a 15-cm stubble, while Trudan plants cut to a 15-cm stubble produced less than those cut to a shorter stubble.…”

Section: Resultssupporting

confidence: 68%

Forage Sorghum Yield Components and Their in vivo Digestibility¹

Fribourg¹,

Duck²,

Culvahouse

1976

Agronomy Journal

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Although the influence of different defoliation management schemes on the productivity and digestibility of summer annual grasses has been studied extensively, little is known about the effects of management on the yield components of these plants. To determine the relative contribution of leaf, stem, and head components to total yield, and to ascertain the digestibility of these plant parts, ‘Sudax SX‐11’ and ‘Trudan’ forage sorghums (Sorghum bicolor (L.) Moench) were seeded in the field in May and in June and subjected to four defoliation schemes: 1) 75‐cm growth cut to a 2.5‐cm stubble and 2) to a 15‐cm stubble; 3) 50‐cm growth cut to a 15‐cm stubble; and 4) early bloom growth cut to a 10‐cm stubble. Dry matter (DM) yields of the first growth and subsequent regrowths, and estimated digestible dry matter (% EDDM) measured with an in vivo nylon‐bag technique, were estimated for leaf blades, culms and leaf sheaths, and inflorescences. Both cultivars produced more DM yields with 75 cm than with 50 cm of growth. Sudax SX‐11 produced less than Trudan when 2.5‐cm rather than when 15‐cm stubbles were used and this was more evident when seeding was delayed one month. Both 50‐ and 75‐cm vegetative growths produced mostly leaf yield of about 80% EDDM throughout the season. Plants cut at early bloom produced much larger DM yields than those cut at vegetative stages. Leaf % EDDM was slightly lower in the early bloom than in the other treatments but stem and head materials were of lower digestibility than leaf blades.

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“…Differences were due to managements and cultivars; interactions involving years could be estimated only for some treatments and were not significant (a= 0.01). Generally, as has been found by others (2,4,10), plants which were allowed to reach later stages of growth or which were harvested only a few times produced more DM than those harvested at earlier vegetative stages or more frequently ..…”

Section: Resultssupporting

confidence: 59%

“…Uniform defoliation management tests have compared yield responses of a number of forage sorghum cultivars (3,10). However, there is need for more explicit delineation of the potentially different responses to defoliation managements by sorghum hybrids; spe• cifically, the influence of time of harvest and stubble height on differential response of cultivars.…”

mentioning

confidence: 99%

Interactions between Forage Sorghum Cultivars and Defoliation Managements¹

Creel¹,

Fribourg²

1981

Agronomy Journal

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Yield and plant constituent responses of forage sorghum (Sorghum bicolor (L.) Moench) cultivars have usually been compared in uniform defoliation management tests. However, the influence of time of harvest and stubble height on differential response of cultivars needs more precise definition. The extent of cultivar × management interaction was studied for ‘Sweet Sioux III’3 (a leafy high‐producing cultivar similar to many others available), ‘FS‐531’ (a silage‐forage cultivar) and ‘Super‐Chowmaker 235’ (several weeks later in maturity than most other forage sorghum cultivars) for 2 years. The soil was a Sequatchie sandy loam (fine‐loamy, siliceous, thermic Humic Hapludults). Stubble height and defoliation managements designed to simulate grazing, greenchop, hay or silage harvests, in various combinations, were used with each cultivar. Chowmaker plants yielded more, had the same or higher N percent, and the same in vitro dry matter digestibility (IVDMD) when cut to a 15‐cm than when cut to an 8‐cm stubble. Sweet Sioux plants yielded more when cut back to 8 cm than to 15 cm, but their N percent and IVDMD were not affected by stubble height. Cutting when forage reached 50 cm previous to the boot (B) or early bloom (EB) cuts delayed subsequent development, and hence harvest, of FS‐531. The other two cultivars reached the B or EB stages at the same time, regardless of whether that harvest was preceded by a prior harvest or not, but the B or EB stages occurred at shorter heights if preceded by a harvest. Harvesting when forage reached 90 cm before the B or EB cut delayed harvest for all cultivars, probably because all regrowth had to originate from axillary meristems. The delay in B or EB harvests may be beneficial in situations where dry matter production later in the season is more desirable. The results suggested that, if the three different cultivars used here had been entered in a yield trial where all entries were managed uniformly, the information on the potential performance of these forage sorghum cultivars could have been misleading. Harvests at early stages of growth would have penalized Super‐Chowmaker 235 in comparison to Sweet Sioux III, and the reverse would have occurred if later stages of growth had been used to determine harvest time.

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Digestible Dry Matter, Crude Protein, and Dry Matter Yields of Grazing‐Type Sorghum Cultivars as Affected by Harvest Frequency¹

Cited by 13 publications

References 7 publications

Evaluation of the Forage Potentials of Pearl Millet in a Semi‐arid Tropical Environment

Evaluation of the Forage Potentials of Pearl Millet in a Semi‐arid Tropical Environment

Forage Sorghum Yield Components and Their in vivo Digestibility¹

Interactions between Forage Sorghum Cultivars and Defoliation Managements¹

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Digestible Dry Matter, Crude Protein, and Dry Matter Yields of Grazing‐Type Sorghum Cultivars as Affected by Harvest Frequency1

Cited by 13 publications

References 7 publications

Evaluation of the Forage Potentials of Pearl Millet in a Semi‐arid Tropical Environment

Evaluation of the Forage Potentials of Pearl Millet in a Semi‐arid Tropical Environment

Forage Sorghum Yield Components and Their in vivo Digestibility1

Interactions between Forage Sorghum Cultivars and Defoliation Managements1

Contact Info

Product

Resources

About

Digestible Dry Matter, Crude Protein, and Dry Matter Yields of Grazing‐Type Sorghum Cultivars as Affected by Harvest Frequency¹

Forage Sorghum Yield Components and Their in vivo Digestibility¹

Interactions between Forage Sorghum Cultivars and Defoliation Managements¹