Drought effects on growth and carbon partitioning in a tall fescue sward grown at different rates of nitrogen fertilization

Onillon, B.; Durand, J. L.; Gastal, François; Tournebize, Régis

doi:10.1016/s1161-0301(14)80020-8

Cited by 44 publications

(16 citation statements)

References 41 publications

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“…However, Matthew et al. (2000), analysing data on tall fescue swards obtained by Onillion et al. (1995), showed that size‐density compensation would only occur beyond a critical LAI that depends on species morphology and environment.…”

Section: Resultsmentioning

confidence: 99%

Influence of sward condition on leaf tissue turnover in tall fescue and tall wheatgrass swards under continuous grazing

Agnusdei

Assuero

Grecco

et al. 2007

Grass and Forage Science

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Two experiments were carried out on a tall fescue sward in two periods of spring 1994 and on a tall wheatgrass sward in autumn 2001 and spring 2003 to analyse the effect of sward surface height on herbage mass, leaf area index and leaf tissue flows under continuous grazing. The experiment on tall fescue was conducted without the application of fertilizer and the experiment with tall wheatgrass received 20 kg P ha )1 and a total of 100 kg N ha )1 in two equal dressings applied in March (autumn) and end of July (midwinter).Growth and senescence rates per unit area increased with increasing sward surface height of swards of both species. Maximum estimated lamina growth rates were 28 and 23 kg DM ha )1 d )1 for the tall fescue in early and late spring, respectively, and 25 and 36 kg DM ha )1 d )1 for tall wheatgrass in autumn and spring respectively. In the tall fescue sward, predicted average proportions of the current growth that were lost to senescence in early and late spring were around 0AE40 for the sward surface heights of 30-80 mm, and increased to around 0AE60 for sward surface heights over 130 mm. In the tall wheatgrass sward the corresponding values during spring increased from around 0AE40 to 0AE70 for sward surface heights between 80 and 130 mm. During autumn, senescence losses exceeded growth at sward surface heights above 90 mm. These results show the low efficiency of extensively managed grazing systems when compared with the high-input systems based on perennial ryegrass.

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Section: Resultsmentioning

confidence: 99%

Influence of sward condition on leaf tissue turnover in tall fescue and tall wheatgrass swards under continuous grazing

Agnusdei

Assuero

Grecco

et al. 2007

Grass and Forage Science

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“…Plastic responses have been described in plants under drought. One of the traits most responsive to drought was found to be LER, and thus it represents a sensitive index of growth under drought (Hsiao, 1973; Onillon et al. , 1995).…”

Section: Introductionmentioning

confidence: 99%

Are more productive varieties of Paspalum dilatatum less tolerant to drought?

Couso

Gatti

Cornaglia

et al. 2010

Grass and Forage Science

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Paspalum dilatatum Poir., is a perennial C 4 grass widely distributed in the Argentinean Pampas. The response to water availability for materials developed with forageproduction purposes is unknown. We hypothesized that genetic differences between commercial varieties are reflected in their regrowth capacity under water stress. The effect of five levels of constant water supply on three plant varieties (two derived from apomictic materials: 'Relincho' and 'Alonso' and one from sexually-derived material: 'Primo') were examined in the greenhouse. Leaf-and plant-response traits were followed during 38 d after a single defoliation event. Seven response variables were measured: three of them were morphogenetic (leaf elongation rate, leaf appearance rate and leaf elongation duration) and four were structural (number of live leaves, lamina length, tiller biomass and tiller production). The sexual material showed higher values for growth variables than the apomictic varieties (leaf elongation rate, leaf length and tiller biomass) across the environmental range. Apomictic varieties showed a proportionally similar drought response to the sexual material for the seven variables. No intra-specific trade-off (statistical interaction) was found between growth under high water availability conditions and drought tolerance.

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“…Drought can also reduce the use of soil mineral nitrogen, which results in poorer forage quality (Onillon et al 1995). Increasing grassland productivity while protecting the environment requires the management of both water and mineral fertilisation based on accurate data (Rodriguez et al 2009).…”

Section: Introductionmentioning

confidence: 99%

How much do water deficits alter the nitrogen nutrition status of forage crops?

Durand

González-Dugo

Gastal

2009

Nutr Cycl Agroecosyst

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Water deficits alter the nitrogen nutrition of crops. In grasslands, this has a major impact on both forage yield and nitrogen fluxes in the soil. It is important to assess the N balance in order to adjust fertilization to the expected needs of the crop and thus minimize any environmentally negative impacts of crops. Grassland species, including grasses, display a diverse ability to utilise soil resources. Nitrogen fluxes and the nitrogen absorption by grass swards of two species with contrasting rooting depths were computed using the appropriate module from the STICS simulation platform. In the case of the deep-rooted species, tall fescue, soil mineral N fluxes to the roots were very close to N uptake values, consistent with its nitrogen nutrition index being lower than one. In the case of the shallow-rooted species Italian ryegrass, there was a large excess in terms of N supply, which was also consistent with its non-limiting nitrogen nutrition index. In both species, and even when nitrogen demands for growth were fully satisfied, the nitrogen nutrition index was closely and linearly related to the soil mineral N flux to roots.

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Drought effects on growth and carbon partitioning in a tall fescue sward grown at different rates of nitrogen fertilization

Cited by 44 publications

References 41 publications

Influence of sward condition on leaf tissue turnover in tall fescue and tall wheatgrass swards under continuous grazing

Influence of sward condition on leaf tissue turnover in tall fescue and tall wheatgrass swards under continuous grazing

Are more productive varieties of Paspalum dilatatum less tolerant to drought?

How much do water deficits alter the nitrogen nutrition status of forage crops?

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