Forage production of tropical grasses under extended daylength at subtropical and tropical latitudes

Newman, Yoana C.; Sinclair, Thomas R.; Blount, Ann; Lugo, María Lesly Montaño; Valencia, Elide

doi:10.1016/j.envexpbot.2007.02.005

Cited by 20 publications

(23 citation statements)

References 7 publications

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“…The site influences pasture productivity through its geographic position, since the climate is influenced by variables such as latitude and longitude (NEWMAN et al, 2007), in their study, in three locations in South Florida, Virgin Islands and Puerto Rico were verified that the highest dry matter yields were obtained in Puerto Rico.…”

Section: Introductionmentioning

confidence: 99%

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Productivity and Nutritive Value of Tifton 85 in Summer, With and Without Irrigation Under Different Nitrogen Doses

Sanches¹,

Gomes

Rickli

et al. 2017

Eng. Agríc.

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ABSTRACT:The pasture irrigation has expanded, mostly in small areas in order to boost the production system, along with the use of soil improvement techniques and high-productivity grasses. Thus, this study, carried out on a small dairy farm property, aimed to evaluate the productivity, botanical composition and nutritive value of Tifton 85 with different nitrogen (N) doses, in the presence and absence of irrigation. The experimental design was a randomized block in a split-plot design with four replications, plots Non-irrigated and Irrigated. The subplots consisted of nitrogen doses: 25 kg ha -1 cycle -1 of N, 50 kg ha -1 cycle -1 of N, 75 kg ha -1 cycle -1 of N and 100 kg ha -1 cycle -1 of N. The irrigation increased the productivity in an average of 3,626.5 kg ha -1 cycle -1 , with higher leaf stem ratio of 1.3, increasing the crude protein content of the pasture. The productivity responded quadratically to nitrogen fertilization with increases up to 84 kg N ha -1 cycle -1 with slight linear decrease of dead matter. There were linear increments of crude protein and digestibility "in vitro" of dry matter in function of applied nitrogen.

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Section: Introductionmentioning

confidence: 99%

“…However, the productive capacity of pastures is also conditioned by climatic factors, mainly temperature and photoperiod NEWMAN et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Productivity and Nutritive Value of Tifton 85 in Summer, With and Without Irrigation Under Different Nitrogen Doses

Sanches¹,

Gomes

Rickli

et al. 2017

Eng. Agríc.

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“…At the recommended N application (90 kg N ha -1 harvest -1 ), NUE was 24 and 25 g g -1 , respectively, in 2009 and 2010. Studies have shown that 'Tifton 85' bermudagrass is one of the forage grasses that use applied N efficiently in terms of biomass production, and NUE values of up to 45 g g -1 have been observed (Mandebvu et al 1999;Brink et al 2004;Newman et al 2007). Mislevy and Martin (1998) compared NUE of 'Tifton 85' bermudagrass with 'Florakirk' bermudagrass (C. dactylon var florakirk) and 'Florico' stargrass (C. nlemfuensis Vanderyst var.…”

Section: Soil Solution Nitrogen Concentration In the Root Zonementioning

confidence: 97%

Agro-ecological nitrogen management in soils vulnerable to nitrate leaching: a case study in the Lower Suwannee Watershed

Agyin‐Birikorang

Newman

Obour

et al. 2011

Nutr Cycl Agroecosyst

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Environmental benefits associated with reduced rates of nitrogen (N) application, while maintaining economically optimum yields have economic and social benefits. Although N is an indispensable plant nutrient, residual soil N could leach out to contaminate groundwater and surface water resources, particularly in sandy soils. A 2-year field study was conducted in an established bermudagrass (Cynodon dactylon) pasture in the Lower Suwannee Watershed, Florida, to evaluate N application rates on forage yield, forage quality, and nitrate (NO 3 -N) leaching in rapidly permeable upland sandy soils. Four N application rates (30, 50, 70, and 90 kg N ha -1 harvest -1 ) corresponding to 0.33, 0.55, 0.77 and IX, respectively, of recommended N rate (90 kg N ha -1 harvest -1 ) for bermudagrass hay production in Florida were evaluated vis-à-vis an unfertilized (0 N) control. Suction cups were installed near the center of each plot at two depths (30 and 100 cm) to monitor NO 3 -N leaching. The grass was harvested at 28 days intervals to determine dry matter yield, N uptake, and herbage nutritive value. Nitrogen application at the recommended rate produced the greatest total dry matter yield (*18.4 Mg ha -1 year -1 ), but a modeled economically optimum N rate of *57 kg N ha -1 harvest -1 (*60% of the recommended N rate) projected an average dry matter yield of *17.3 Mg ha -1 year -1 , which represents [90% of the observed maximum yield. Nitrogen application increased nutritive quality of the grass, but increases in N application rate above 30 kg N ha -1 did not result in significant increases in in vitro digestible organic matter concentration, and tissue crude protein was not significant above 50 kg N ha -1 . Across the sampling period, treatments with N rates B50 kg N ha -1 harvest -1 had leachate NO 3 -N concentration below the maximum contaminant limit of \10 mg l -1 . Conversely, applying N at rates C70 kg N ha -1 harvest -1 resulted in leachate N concentration that exceeded the maximum contaminant limit, and suggest high risk of impacting groundwater quality, if such rates are applied to soils with coarse (sand) textures. The study demonstrates that recommendation of a single N application rate may not be appropriate under all agro-climatic conditions and, thus, a site-specific evaluation of best N management strategy is critical.

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“…The limited forage availability during the months with shorter day length has been one of the most important factors influencing animal production and the pasture management (Sinclair et al 2003), although it cannot be used as a single parameter responsible for the low-forage yield during this period. Newman et al (2007), in a study conducted in Florida with the genera Paspalum, Panicum and Cynodon, observed average yields of total dry mass 3.5 times higher with extended photoperiod when compared with the normal photoperiod that occurs during the winter.…”

Section: Resultsmentioning

confidence: 95%

“…The reduction in forage yield of Paspalum notatum in the winter period characterized it as a long-day species (Newman et al, 2007), which flowers between the months of October and March, and approximately 85% of forage yield occurs during summer (Newman et al, 2011). Thus, the key issue for this type of response is whether an extended photoperiod during the cold months could have a negative impact on subsequent yields of ecotypes and hybrids, while resulting in an increase in forage yield during the cold months.…”

Section: Resultsmentioning

confidence: 99%

Agronomic evaluation of Paspalum notatum Flügge under the influence of photoperiod

et al. 2017

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-The objective of this study was to evaluate the influence of photoperiod on the forage yield by ecotypes and intraspecific hybrids of P. notatum. Tetraploid ecotypes from the United States Department of Agriculture and the National University of the Northeast in Argentina, in addition to six intraspecific hybrids, totaling 19 ecotypes, were assessed. The materials evaluated were subjected to an extended photoperiod (14 h of light) and natural photoperiod from July 2011 to October 2012. The experimental design was a completely randomized factorial scheme of 19 × 2 (ecotypes × photoperiod) consisting of five replicates. The materials were influenced differentially by the variation in photoperiod, with one group showing high sensitivity, whereas another, smaller group, was insensitive to this factor. The use of materials with differentiated responses to photoperiod in different climatic regions can be an important tool to increase forage yield of Paspalum notatum.

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Forage production of tropical grasses under extended daylength at subtropical and tropical latitudes

Cited by 20 publications

References 7 publications

Productivity and Nutritive Value of Tifton 85 in Summer, With and Without Irrigation Under Different Nitrogen Doses

Productivity and Nutritive Value of Tifton 85 in Summer, With and Without Irrigation Under Different Nitrogen Doses

Agro-ecological nitrogen management in soils vulnerable to nitrate leaching: a case study in the Lower Suwannee Watershed

Agronomic evaluation of Paspalum notatum Flügge under the influence of photoperiod

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