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Web URL(s): | https://scisoc.confex.com/crops/2019am/meetingapp.cgi/Paper/119571 Last checked: 01/30/2020 |
Publication Type:
| Report |
Content Type: | Abstract or Summary only |
Author(s): | Rouquette, Francis M. Jr. |
Author Affiliation: | Texas A&M AgriLife - Overton, Texas A&M University, Overton, TX |
Title: | Fifty years of stocking rates on bermudagrass pastures: Planning, persistence, and good fortune |
Section: | ASA section: Land management and conservation Other records with the "ASA section: Land management and conservation" Section
Symposium - Relevance of long-term research in meeting tomorrow's challenges in agriculture Other records with the "Symposium - Relevance of long-term research in meeting tomorrow's challenges in agriculture" Section
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Meeting Info.: | San Antonio, Texas: November 10-13, 2019 |
Source: | ASA, CSSA and SSSA International Annual Meetings. 2019, p. 119571. |
Publishing Information: | [Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America] |
# of Pages: | 1 |
Keywords: | TIC Keywords: Cynodon; Cynodon dactylon; Lolium multiflorum; Nutrients; Pastures; Persistence; Research facilities; Soil sampling; Trifolium
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Cultivar Names: | Coastal |
Abstract/Contents: | "Most soil-plant and cropping system experiments are not designed to be multi-year projects; however, with data analyses, investigator curiosity-interest, funding, and site-availability, some projects have evolved into long-term research investigations. In 1968, 5 warm-season perennial grasses were established and initially grazed in 1969 at different stocking rates at Texas A&M AgriLife Research at Overton, TX. Two of the original grasses, Coastal and common bermudagrass [Cynodon dactylon (L) Pers.] (BG), remain as research pastures with overseeding of ryegrass (Lolium multiflorum L.) or clovers (Trifolium sp) and fertility regimens (N vs no-N) added to the stocking rate treatments. Soil samples were taken from 0 to 120 cm depths in all BG pastures in 1970, 1975, 1985, 1994, 2004, 2014, and 2018, with analyses for pH, NO3-N, P, K, Mg, and Ca. Although levels of extractable P increased with stocking rates, there was no evidence of excessive soil P accumulation. Increasing stocking rate showed an increase in soil NO3-N levels at soil depth >45 cm; however, at 0-45 cm depth, there were no effects on NO3-N levels. Prolonged, high stocking rates of 5 to 7.5 cow-calf pair per ha (3500 to 5250 kg BW ha-1) caused substantial loss of the original BG. Low stocking rates of 2 to 2.5 pair per ha (1500 kg BW ha-1) allowed for continued persistence and maintenance of BG. Collaborative, team efforts documented long-term impacts of stocking rates with cows and calves on soil nutrient status, persistence of BG, and gains per animal and per ha. In 2000, we created an on-going and archival database, BeefSys, that includes soil, forage, and birth-to-harvest attributes of cattle from 1969 to date. This long-term soil-plant-animal research provides principles for best management strategies for environmentally-compatible, economically viable, and sustainable production systems for BG pastures and beef cattle." |
Language: | English |
References: | 0 |
Note: | This item is an abstract only! "297-4" |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Rouquette, F. M. Jr. 2019. Fifty years of stocking rates on bermudagrass pastures: Planning, persistence, and good fortune. Agron. Abr. p. 119571. |
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