Forage herbs as an alternative to ryegrass-white clover to alter urination patterns in grazing dairy systems

Mangwe, Mancoba C.; Bryant, Racheal H.; Beck, Matthew R; Beale, Nigel; Bunt, Craig R.; Gregorini, Pablo

doi:10.1016/j.anifeedsci.2019.04.001

Cited by 41 publications

(50 citation statements)

References 35 publications

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“…Box et al (2017b) reported increased urine volumes with 50 or 100% plantain diets. Similarly Mangwe et al (2019) also showed increased urine volumes from cows grazing plantain compared with ryegrass clover. Those authors also included chicory in the comparison and observed higher urination than either ryegrass or plantain, and they attributed that to low feed DM content and large feed water intakes.…”

Section: Urine Dilution and N Load Distributionmentioning

confidence: 85%

“…a small (non-statistical) increase in mean urine volume per urination (Box et al 2017b;Mangwe et al 2019). There is considerable diurnal variability in urination event size, cows will urinate smaller events more frequently during the day, while at night glomerular filtration rate (within the kidney) slows and the bladder is able to store more urine (Noh et al 2011) so there are fewer larger volume events during the night (Shepherd et al 2017a;Mangwe et al 2019).…”

Section: Urine Dilution and N Load Distributionmentioning

confidence: 99%

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Can alternative forages substantially reduce N leaching? findings from a review and associated modelling

Bryant

Snow

Shorten

et al. 2019

New Zealand Journal of Agricultural Research

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Nitrogen (N) leaching losses from grazed pasture systems pose a risk to the environment with mitigation strategies urgently required to achieve regulatory limits. There has been increased interest in alternative forages to manipulate excretion of urinary-N of livestock. This review summarises research on key forage attributes which affect the pattern of urine-N excretion. The literature showed an opportunity to alter both N concentration and moisture concentration of forages to reduce urine patch N loading. Complementary mitigations of extending the grazing rotation and reducing fertiliser were tested in simulations in addition to a diuresis effect on nitrate leaching in pastoral dairy systems. Findings suggested that forage species alone could not substantially reduce (by more than 20%) nitrate leaching. Combining all forage, management and systems-based solutions led to the greatest reductions in nitrate leaching, 59 and 31% for Waikato and Canterbury. Nonetheless, reductions in N loss came at the expense of pasture productivity which will likely affect profitability and farmer adoption of this suite of solutions in the absence of other drivers. The role of plant secondary metabolites in microbial dynamics has implications on N recycling in soil and rumen environments and this was identified as an area for further research.

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Section: Urine Dilution and N Load Distributionmentioning

confidence: 85%

Section: Urine Dilution and N Load Distributionmentioning

confidence: 99%

Can alternative forages substantially reduce N leaching? findings from a review and associated modelling

Bryant

Snow

Shorten

et al. 2019

New Zealand Journal of Agricultural Research

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“…The pastures used in this experiment were second-year CH and sixth-year RGWC. Details of establishment were given in Mangwe et al [21]. Briefly, the ryegrass (cv.…”

Section: Experimental Site and Designmentioning

confidence: 99%

“…In our earlier proof-of-concept research, elevated PUFA were recorded from late lactation cows fed pasture diets of CH compared with the control RGWC in a grazing study [19]. Feeding CH, as all or as part of a ration, has also shown milk yield improvements [20,21] and nitrogen loss reductions [18,22,23] compared to traditional ryegrass pastures.…”

Section: Introductionmentioning

confidence: 95%

Rumen Fermentation and Fatty Acid Composition of Milk of Mid Lactating Dairy Cows Grazing Chicory and Ryegrass

Mangwe

Bryant

Gregorini

2020

Animals

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The goals of the current study were to investigate the effects of including chicory (Cichorium intybus L.) into the traditional feeding regime of ryegrass/white clover (Lolium perenne L./Trifolium repens L.), and time of its allocation on milk production, rumen fermentation, and FA composition of milk and rumen digesta of dairy cows. Nine groups of four cows were allocated one of three replicated feeding regimes: (1) ryegrass/white clover only (RGWC), (2) ryegrass/white clover + morning allocation of chicory (CHAM), and (3) ryegrass/white clover + afternoon allocation of chicory (CHPM). One cow per group had a rumen cannulae fitted. Treatment did not affect total grazing time or estimated dry matter intake, but cows ruminated more when fed RGWC than chicory. Allocating chicory in the afternoon elevated milk production compared with RGWC and CHAM. Milk from cows grazing chicory contained greater concentrations of polyunsaturated FA (PUFA) such as C18:3 c9, 12, 15 and C18:2 c9, 12 than those on RGWC. As with milk, rumen digesta concentration of PUFA increased when cows grazed on chicory rather than RGWC, which corresponded with lower concentrations of intermediate vaccenic and biohydrogenation end-product stearic acid for cows grazing on chicory. Mean ruminal pH was lower for cows offered chicory than those on RGWC, reflecting greater rumen concentrations of volatile fatty acids (VFA) for cows fed chicory. Allocating chicory during the afternoon is a useful strategy that can translate to improved milk production. The lower rumen pH, lower concentration of vaccenic and stearic acids, and elevated concentration of PUFA in the rumen of cows fed chicory suggest reduced biohydrogenation and may explain the elevated concentration of PUFA in the milk of cows fed chicory compared with those fed RGWC.

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“…Several studies have reported that a way of mitigating N use inefficiencies by grazing ruminants is to provide them with forages with high moisture and minerals and low N contents ( Gregorini et al, 2016 ; Gregorini et al, 2018a ; Mangwe et al, 2019 ). Moreover, other studies have reported that herbs containing plant secondary compounds (e.g., condensed tannins, terpenoids, and saponins) may further enhance this mitigation by their antibiotic ( Tan et al, 2011 ), N precipitative ( Waghorn, 2008 ), or even diuretic effects ( Gardiner et al, 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Plantain (Plantago lanceolata) reduces the environmental impact of farmed red deer (Cervus elaphus)1

Beck

Garrett

Thompson

et al. 2020

Translational Animal Science

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The objective of this study was to evaluate the effect of plantain (Plantago lanceolata L.) on water dynamics and balance, as well as nitrogen (N) excretion by red deer (Cervus elaphus L.) as a potential forage tool to reduce negative environmental impacts. This experiment used a cross-over design with red deer (n = 8) in metabolism crates to determine how fresh cut herbage diets of either plantain or ryegrass (Lolium perenne L.) compared in terms of dry matter intake (DMI), diet digestibility, water dynamics, and N dynamics. Deer consuming plantain had greater water intake from herbage (P & 0.01) compared with ryegrass. Additionally, when fed plantain, deer had greater water excretion from urine (P & 0.01; 69.4%), feces (P & 0.01; 29.4%), and thus total water excretion (P & 0.01; 61.7%) than when fed ryegrass. When consuming plantain, deer had greater DMI (P = 0.02; +11.2%) and fecal output (P & 0.01; +36.8%), and lower apparent dry matter digestibility (DMD; P = 0.03; -8.3%) compared with ryegrass. Plantain (15.9%) contained 30% less crude protein than ryegrass (22.8%), so that even with the greater DMI of plantain, plantain had lower (P & 0.01; -23%) N intake (g/d). Deer consuming plantain had lower urine N concentration (P & 0.01) than when consuming ryegrass. Additionally, deer consuming plantain had much less daily urine N (P & 0.01; -34.9%) excretions. Our results indicate deer fed plantain had greater DMI, ingested more water, and excreted more water than those consuming ryegrass, with lower urinary N concentration and lesser daily urine N excretion. Thus, we conclude that offering red deer plantain may reduce the environmental impact associated with urinary N output, such as nitrate leaching or N2O emissions to the atmosphere.

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Forage herbs as an alternative to ryegrass-white clover to alter urination patterns in grazing dairy systems

Cited by 41 publications

References 35 publications

Can alternative forages substantially reduce N leaching? findings from a review and associated modelling

Can alternative forages substantially reduce N leaching? findings from a review and associated modelling

Rumen Fermentation and Fatty Acid Composition of Milk of Mid Lactating Dairy Cows Grazing Chicory and Ryegrass

Plantain (Plantago lanceolata) reduces the environmental impact of farmed red deer (Cervus elaphus)1

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