Structural equation modeling reveals complex relationships in mixed forage swards

McLeod, Erin M.; Banerjee, Samiran; Bork, Edward W.; Hall, Linda M.; Hare, Donald D.

doi:10.1016/j.cropro.2015.08.019

Cited by 11 publications

(11 citation statements)

References 47 publications

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“…Detailed developments and theories for SEM have been described in several publications (Grace, 2006; Lamb et al, 2011). In the past decade, SEM has been successfully applied in many fields of plant science, such as analyses of yield components (Lamb et al, 2011), genotype × environment interactions (Dhungana et al, 2007), plant diversity (Grace and Keeley, 2006), and the effects of abiotic and biotic stresses on plant growth (He et al, 2013; McLeod et al, 2015).…”

Section: Methodsmentioning

confidence: 99%

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Responses of Cotton at Different Growth Stages to Aeration Stress under the Influence of High Temperature

et al. 2018

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In the middle reach of the Yangtze River Plain, cotton (Gossypium hirsutum. L) can experience aeration stress at multiple growth stages, often accompanied by high temperature. These two stresses can negatively affect growth and yield. This study aimed to investigate the responses of cotton at different growth stages to aeration stress, particularly under high temperature. Two field experiments examining cotton responses to aeration stress were conducted over 8 yr, and structural equation modeling was performed to reveal the relationships among aeration stress, high temperature, and the growth and yield of cotton at four growth stages. The interannual variability in the yield‐reducing effect of aeration stress was closely associated with high temperature. Aeration stress and high temperature both interactively (in Experiment 1) and independently (in Experiment 2) reduced seed cotton yield. The interaction between these two stresses was observed only in Experiment 1, in which the impact of aeration stress was relatively slight. In Experiment 1, the growth stage most sensitive to aeration stress changed with high temperature. In both experiments, under high temperature, the sensitivity of seed cotton yield to aeration stress was threefold higher at the flowering and boll‐filling stage than at the other stages. In conclusion, the responses of cotton to aeration stress depend on the time at which aeration stress occurs and the additional impact, if any, of high temperature.

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Section: Methodsmentioning

confidence: 99%

“…A key strength of SEM is its ability to reveal cause‐and‐effect relationships (McLeod et al, 2015). The path diagram of SEM consists of cause‐and‐effect paths, and the two variables of each path can be classified as the cause and effect, respectively.…”

Section: Methodsmentioning

confidence: 99%

Responses of Cotton at Different Growth Stages to Aeration Stress under the Influence of High Temperature

et al. 2018

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“…In addition, this cultivation system is a sustainable production strategy. Muir, Pitman, andFoster (2011), Azevedo Junior et al (2012), Lüscher, Mueller-Harvey, Soussana, Rees, andPeyraud (2014), McLeod, Banerjee, Bork, Hall, andHare (2015), and Vrignon-Brenas et al (2016) have all reported that the forage consortium system helps reduce the consumption of chemical fertilizers and pesticides. Multi-species crops also conserve and increase local biodiversity.…”

Section: Acta Scientiarum Animal Sciencesmentioning

confidence: 99%

<b>Production and chemical composition of grasses and legumes cultivated in pure form, mixed or in consortium

Tambara

Sippert

Jauris

et al. 2017

Acta Sci. Anim. Sci.

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ABSTRACT. The objective of this study was to assess the edible biomass and chemical composition of forages grown on pure form, as a grass mix, and in grass-legume consortia. The following species were tested: white oats (Avena sativa), black oats (Avena strigosa), ryegrass (Lolium multiflorum), forage peanut (Arachis pintoi), white clover (Trifolium repens), and red clover (Trifolium pratense). The experiment consisted of sixteen treatments arranged in a completely randomized design. The parameters measured were total dry matter (PMST), neutral detergent fiber (NDF), acid detergent fiber (ADF), and crude protein (CP). No significant differences in PMST were found among the consortia (p > 0.05). Only the pure cultivated white clover (p > 0.05) was comparable to the consortia in terms of biomass production. The three legumes had the lowest average NDF values (p > 0.05), based on their contributions to the total NDF content of the consortia along the cuts. The ADF content increased for all treatments during the cuts. The results indicate that in pasture, legumes increase protein content, and forage consortia increase both the pasture production and the grazing period. Their chemical composition is adequate for boosting livestock production in pastures.Keywords: Arachis pintoi, Avena sp., fiber, Lolium multiflorum, protein, Trifolium sp.Produção e composição bromatológica de gramíneas e leguminosas cultivadas de forma estreme, misturadas ou em consórcio RESUMO. Objetivou-se avaliar a produção de biomassa e a composição bromatológica ao longo do ciclo produtivo de forrageiras cultivadas de forma estreme, misturadas ou consorciadas. Foram utilizadas as seguintes espécies: aveia branca (Avena sativa), aveia preta (Avena strigosa), azevém (Lolium multiflorum), amendoim forrageiro (Arachis pintoi), trevo branco (Trifolium repens) e trevo vermelho (Trifolium pratense). As forrageiras foram cultivadas em 16 tratamentos em delineamento inteiramente casualizado, sendo analisados a produção de matéria seca total (PMST) e os teores de fibra em detergente neutro (FDN), fibra em detergente ácido (FDA) e proteína bruta (PB). Quanto à PMST, não foram constatadas diferenças (p > 0,05) entre os consórcios, sendo apenas o cultivo estreme de trevo branco comparável (p < 0,05) aos consórcios em biomassa produzida. Em relação ao FDN, as três leguminosas isoladas apresentaram os menores valores (p > 0,05) na média geral, ficando evidente a sua contribuição no teor de FDN dos consórcios ao longo dos cortes. O teor de FDA aumentou no decorrer dos cortes para todos os tratamentos. Os resultados indicam que a inclusão de leguminosas aumenta os teores proteicos, e os consórcios de forrageiras aumentam a produção de pastagem e o período de pastejo, com composição bromatológica adequada para potencializar a produção animal a pasto.

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“…Total herbage production was also numerically higher in the RSSP than the CBGP. This finding is supported by McLeod et al (2015), who found Canada thistle impacts on herbage yield were not a function of weed density or biomass. Change in grass production following Canada thistle control has varied in previous studies and was attributed to differences in moisture received during the trials (McLeod et al 2015;Reece and Wilson 1983).…”

Section: Resultsmentioning

confidence: 52%

“…This finding is supported by McLeod et al (2015), who found Canada thistle impacts on herbage yield were not a function of weed density or biomass. Change in grass production following Canada thistle control has varied in previous studies and was attributed to differences in moisture received during the trials (McLeod et al 2015;Reece and Wilson 1983). However, the difference in grass production (425 kg ha −1 ) in noninfested RSSP wildlands compared with Canada thistle-infested (RSSP) wildlands was not likely due to moisture or temperature (Tables 2 and 5) in this study.…”

Section: Resultsmentioning

confidence: 52%

Canada Thistle (Cirsium arvense) Affects Herbage Production in the Northern Great Plains

Carter

Lym

2017

Invasive plant sci. manag.

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Canada thistle can cause greater than 50% yield loss in small grain crops, but little is known about production losses when the weed invades pasture and wildlands. Change in grass, forb, and woody species production from Canada thistle infestations was evaluated in two separate studies in North Dakota. The first measured change in production following aminopyralid applied at 120 g ha−1to control Canada thistle at two prairie sites. In general, grass, broadleaf, woody, and total plant yields were similar between treated and untreated prairie, regardless of the near-complete control of Canada thistle following aminopyralid application. Grass yield increased by 365 kg ha−1the year after treatment at one location, with no change in forb or woody species production. Plant production was also estimated at 20 ungrazed wildland preserves located within two Major Land Resource Areas (MLRAs). Similar to the prairie sites, minimal differences in production between Canada thistle–infested and noninfested sites were observed. The only exception was an increase in grass production of 425 kg ha−1at one of the MLRAs, with no change in broadleaf or woody species production between the Canada thistle–infested and noninfested sites. In contrast to cropland, pasture and wildland production of other species was not consistently reduced by Canada thistle.

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Structural equation modeling reveals complex relationships in mixed forage swards

Cited by 11 publications

References 47 publications

Responses of Cotton at Different Growth Stages to Aeration Stress under the Influence of High Temperature

Responses of Cotton at Different Growth Stages to Aeration Stress under the Influence of High Temperature

<b>Production and chemical composition of grasses and legumes cultivated in pure form, mixed or in consortium

Canada Thistle (Cirsium arvense) Affects Herbage Production in the Northern Great Plains

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