Biosaline agriculture for forage and livestock production

Masters, David G.; Benes, S.E.; Norman, Hayley C.

doi:10.1016/j.agee.2006.08.003

Cited by 203 publications

(122 citation statements)

References 86 publications

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“…Second, the large areal loading rates required for efficient nutrient removal by subsurface-flow wetlands (Crites, 1994) may not be economically feasible in an agricultural setting, unless the wetland plants have some productive use. In this context, whole-farm bio-economic analyses have shown that the establishment of saltland pastures can significantly increase farm profitability (O'Connell and Young, 2002) and there has been much recent interest in salt-tolerant fodder plants (Rogers et al 2005;Masters et al, 2007;Rozema and Flowers 2008). Therefore, a wetland treatment system that could both remove nutrients from aquaculture effluent and provide a suitable fodder crop for livestock holds much promise for the development of an integrated agri-aquaculture system on salt-affected agricultural land.…”

Section: Introductionmentioning

confidence: 99%

The potential of a salt-tolerant plant (Distichlis spicata cv. NyPa Forage) to treat effluent from inland saline aquaculture and provide livestock feed on salt-affected farmland

Lymbery

Kay

Doupé

et al. 2013

Science of The Total Environment

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Dryland salinity is a major problem affecting food production from agricultural land in Australia and throughout the world. Although there is much interest in using saline groundwater to grow marine fish on salt-affected farmland, the disposal of nutrient enriched, saline aquaculture effluent is a major environmental problem. We investigated the potential of the salt-tolerant NyPa Forage plant (Distichlis spicata L. Greene var. yensen-4a) to trap nutrients from saline aquaculture effluent and subsequently to provide a fodder crop for livestock. Sub-surface flow wetlands containing NyPa Forage were constructed and their efficacy in removing total nitrogen, ammonia, nitrite/nitrate, total phosphorus and orthophosphate was monitored under different levels of nutrients and salinity. The wetlands removed 60 -90% of total nitrogen loads and at least 85% of ammonia, nitrite/nitrate, total phosphorus and orthophosphate loads, with greater efficiency at high nutrient and low salinity levels. The above-ground yield, sodium, crude protein (CP) and in vitro dry matter digestibility (DMD) of NyPa Forage plants were measured after fertilisation with different nutrient levels and cropping at different frequencies. Yield of plants increased with increased nutrient, while nutritive value was greater when nutrients were applied but did not differ among nutrient levels. Yield was not affected by cropping frequency, but nutritive value was greatest when plants were cropped at intervals of 21 or 42 days. At optimum nutrient addition and cropping levels, the plants had a mean CP content of 16.7 % and an in vitro DMD of 67.6 %, equivalent to an energy value of 9.5 MJ kg -1 . Assuming an equivalent fibre content and voluntary food intake as grass hay, and no accumulation of other toxic minerals, these nutritive values would be sufficient for maintenance or moderate liveweight gains in dry adult sheep or cattle. Keywords:salinity; inland saline aquaculture; effluent; constructed wetlands; saltland pasture; agri-aquaculture 3 IntroductionSecondary salinisation, in which human activities lead to high concentrations of ions (principally sodium and chloride) in the landscape, is a major environmental problem affecting freshwater and soil in many arid and semi-arid areas of the world (Ghassemi et al., 1995;Rozema and Flowers, 2008). Secondary salinisation occurs because of rising water tables, as a result of irrigation (irrigation salinity) or land clearing (dryland salinity). It is a particular problem in economically less-developed countries (e.g. India, Tunisia, Morocco, Peru and Bolivia) although more-developed regions, such as Australia, may also be badly affected (Rozema and Flowers, 2008). In Australia, the widespread clearing of native vegetation has resulted in approximately 5.7 M ha of agricultural land being adversely affected by dryland salinity, and this figure may grow to 17 M ha by 2050 (National Land and Water Resources Audit, 2001).The salinisation of agricultural land in arid regions is largely irreversible because ...

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Section: Introductionmentioning

confidence: 99%

The potential of a salt-tolerant plant (Distichlis spicata cv. NyPa Forage) to treat effluent from inland saline aquaculture and provide livestock feed on salt-affected farmland

Lymbery

Kay

Doupé

et al. 2013

Science of The Total Environment

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“…(2010) reported that sheep and goats consuming more than one kg DM per day of A. nummularia could show toxicological signs. Therefore, feeding Atriplex species solely may predispose livestock to mineral imbalances (Masters et al, 2007). Although further analysis of the ash content was beyond the scope of this study, it is imperative to determine the levels of ash constitutes, including oxalates and other anti-nutritive factors so as to determine feeding levels that would avoid toxicity.…”

Section: Resultsmentioning

confidence: 99%

Seasonal Preference of Awassi Sheep for Atriplex shrubs suitable for Mediterranean Rangelands

Wamatu¹,

Louhaichi²,

Rubanza³

et al. 2017

JEBAS

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The relative preference of Awassi sheep for four promising Atriplex species, A. halimus, A. nummularia, A. canescens and A. lentiformis was tested in cafeteria trials. Atriplex species were offered to sixteen sheep in cafeteria-type experiments during two seasons, spring and autumn. After an adaptation period of 7 days, sheep were offered the species over eight consecutive days. The species were placed in troughs for two hours in the morning after overnight fasting. Sheep were housed individually in pens adjacent to each other. In both seasons, whole species and their botanical fractions were evaluated for chemical composition and in vitro digestibility. The variability of nutritive value among species was not dependent on season or botanical fraction. Time series analysis showed that intake levels and ranking of species did not change over the eight days. Average daily proportions (%) of whole shrub eaten were A. halimus (70.9) A. nummularia (70), A. lentiformis (65.3), and A. canescens (57.9). In autumn, the same order of consumption was maintained, though intake levels tended to be lower compared to spring. The behavioral pattern revealed that the number of return visits to troughs and time spent feeding on species did not influence intake levels. The botanical structure of species explained 20% of the variation in proportion of intake of whole species. The proportion of leaf was the major contributor to variation in proportion of intake of whole species. Relative preference of whole species was explained by intake, nutritive value and fractional proportions of the botanical fractions.

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“…D'une part, il est possible d'agir sur le sol lui-même, en éli-minant l'excès de sels solubles qu'il contient (Kotzer, 2005) ; cette opération nécessite une disponibilité en eau de qualité acceptable, elle exige des investissements importants pour la mise en place d'un réseau de drainage pour évacuer les sels solubles du profil. D'autre part, il est possible de valoriser les sols salés par la culture de plantes résistantes aux conditions salines et qui présentent un intérêt agricole (Masters et al, 2007).…”

Section: Introductionunclassified

Étude de la résistanced'Atriplex halimussubsp.schweinfurthiiaux sels solubles

Nedjimi¹

2010

Acta Botanica Gallica

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Biosaline agriculture for forage and livestock production

Cited by 203 publications

References 86 publications

The potential of a salt-tolerant plant (Distichlis spicata cv. NyPa Forage) to treat effluent from inland saline aquaculture and provide livestock feed on salt-affected farmland

The potential of a salt-tolerant plant (Distichlis spicata cv. NyPa Forage) to treat effluent from inland saline aquaculture and provide livestock feed on salt-affected farmland

Seasonal Preference of Awassi Sheep for Atriplex shrubs suitable for Mediterranean Rangelands

Étude de la résistanced'Atriplex halimussubsp.schweinfurthiiaux sels solubles

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