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Early‐season grazing of native grasses offers potential profitable benefit
Author(s) -
Rushing Jason Brett,
Maples Joshua Gilchrist,
Rivera John Daniel,
Lyles Johnson Clay
Publication year - 2020
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.1002/agj2.20130
Subject(s) - grazing , paspalum notatum , andropogon , pasture , agronomy , biology , perennial plant , forage , digitaria , zoology
Abstract A grazing trial was conducted in Mississippi during 2016 and 2017 to compare pasture, animal, and economic performance of three perennial, warm‐season grass systems. Grass treatments included: (i) Argentine bahiagrass ( Paspalum notatum Fluegge; BAH); (ii) KY Ecotype big bluestem ( Andropogon gerardii Vitman; BBS); and (iii), KY Ecotype indiangrass [ Sorghastrum nutans (L.) Nash], big bluestem and little bluestem [ Schizachyrium scoparium (Michx.) Nash; MIX]. Paddocks were continuously stocked using weaned beef ( Bos taurus ) steers across three grazing intervals (I, II, and III) during late spring and summer. Pasture measurements included forage mass (FM) and nutritive value. Greatest FM was observed during grazing interval II in 2016 (931.70 kg ha –1 ). Nutritive values declined as the season progressed. The BAH had greater CP and TDN, and lower ADF and NDF concentrations than BBS and MIX in 2016. Differences were not as discernable in 2017. Greatest ADG were observed for BBS interval I in 2017 (1.34 kg d –1 ), MIX interval I 2017 (1.21 kg d –1 ), and BBS interval I 2016 (1.19 kg d –1 ). Beef yield per hectare (GAIN) was greatest for interval I across both years (464.78 kg ha–1). By species, GAIN was greatest for BBS in interval I (451.32 kg ha –1 ). For economic analysis, BBS had the lowest total annual pasture cost (US$142.65 ha –1 ), and had the greatest NET returns for 2016 ($268.96 ha –1 ) and 2017 ($249.98 ha –1 ). Implementing native warm‐season grasses (NWSG) in stocker cattle systems for early‐season grazing can be productive in Mississippi.