The potential for combining living wall and vertical farming systems with aquaponics with special emphasis on substrates          下载免费PDF全文

Mohammed Khandaker  Benz Kotzen 《Aquaculture Research》2018,49(4):1454-1468

Aquaponics is a method of food production, growing fish and vegetables in a recirculating aquaculture system. Aquaponics uses the water from the fish to feed the plants in a totally natural way and like hydroponics, aquaponics is considered to be more sustainable as more plants can be grown per square metre compared to normal agriculture. However, as is the case with normal agriculture, in aquaponics plants are grown within horizontally. In aquaponics, using the UVI system, the ratio between fish tanks:filters:plant tanks is 2:1:5 which means that the plant tanks are occupying close to half of the production space. In order to reduce the spatial requirement for plants, which would make production even more sustainable, this research investigates aspects of combining living wall and vertical farming technologies in aquaponics. It is considered that by growing the plants vertically less space would be required. In this research living wall system is investigated but the main focus is on the potentials of using various inert substrates in the living wall systems for vertical aquaponics. The results showed that a pot system performs better in terms of management of the systems. With regard to substrates, horticultural grade coconut fibre and horticultural grade mineral wool outperformed other substrates.  相似文献   

Optimization of the stocking parameters for mud spiny lobster Panulirus polyphagus (Herbst, 1793) capture‐based aquaculture in tropical open sea floating net cages          下载免费PDF全文

Divu Damodaran  Kunnamangalam Mohammed Koya  Suresh Kumar Mojjada  Chauhan Devaji Lalaji  Gyanaranjan Dash  Vinay Kumar Vase  Kannanchery Ramanathan Sreenath 《Aquaculture Research》2018,49(2):1080-1086

Mud spiny lobsters, Panulirus polyphagus (Herbst, 1793), were reared at four different stocking sizes and stocking densities in open sea cages to evaluate their effects on growth performance. To evaluate the effect of stocking size on the growth performance, the lobsters were segregated into four different treatment groups according to size and were stocked at a density of 300 animals per cage. To evaluate the effect of stocking density on the growth performance, lobsters of 81–100 g were stocked in four different stocking densities, i.e. 16/m², 24/m², 32/m² and 40/m². The results showed that the growth rate of (60–80 g) size group, was significantly higher compared to the size groups, i.e. 101–120 g and 121–140 g comprising of larger individuals. The final body weight, though significantly higher in 81–100 g as compared to 60–80 g, the growth performance (i.e. weight gain percentage (WG %) and specific growth rate (SGR)) were not significantly different. The density‐dependent influence on growth performance was evident in this study. The WG % and SGR during 90 days’ culture period was significantly higher in 24/m² compared to other groups. This study provides crucial information about the appropriate stocking density and stocking size of lobsters at the field level, which would help to promote sustainable lobster cage farming by maximizing the production potential of the system.  相似文献   

Lime-Amended Semi-arid Soils in Retaining Copper,Lead, and Zinc from Aqueous Solutions     

Arif Ali Baig Moghal  Krishna R. Reddy  Syed Abu Sayeed Mohammed  Mosleh Ali Al-Shamrani  Waleed M. Zahid 《Water, air, and soil pollution》2016,227(10):372

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Arbuscular mycorrhizal fungal association in Asteraceae plants growing in the arid lands of Saudi Arabia     

Partha P DHAR  Abdul A AL-QARAWI  Mohammed A U MRIDHA 《干旱区科学》2015,7(5):676-686

The present research was undertaken to explor the possibility of arbuscular mycorrhizal(AM) association with Asteraceae plants in the arid lands of Saudi Arabia(Al-Ghat, Buraydah, Thumamah and Huraymila). AM fungal colonization in the roots, spore numbers in the rhizosphere soil, fungal species diversity and correlation between AM properties and soil properties were determined. The highest colonization was in Conyza bonariensis(65%) from Al-Ghat, Anthemis cotula(52%) from Buraydah and C. bonariensis(53%) from Thumamah. The lowest was in Vernonia schimperi(41%) from Al-Ghat, Pulicaria undulata(25%) from Buraydah, Acanthospermum hispidum(34%) from Thumamah, Asteriscus graveolens(22%) and V. schimperi(22%) from Huraymila. Vesicular and arbuscular colonization were also presented in all plant species examined. The number of spores were 112–207 in Al-Ghat, 113–133 in Buraydah, 87–148 in Thumamah and 107–158 in Huraymila. Funneliformis mosseae, Glomus etunicatum, G. fasciculatum and G. aggregatum were identified. Relative frequency of AM fungal species varied widely and was irrespective of location and plant species. Diversity index varied with the rhizosphere soils of different plant species at various locations. Soil properties varied with locations and no distinct correlations were observed among the soil properties, root colonization and the number of spores. The results of the present study specified the association of AM fungi in different plants of Asteraceae and its significance in the ecological functioning of annual plants in the punitive environments of the rangelands in Saudi Arabia.  相似文献   

Racing performance after combined prosthetic laryngoplasty and ipsilateral ventriculocordectomy or partial arytenoidectomy: 135 Thoroughbred racehorses competing at less than 2400 m (1997–2007)     

T. H. Witte  H. O. Mohammed  C. H. Radcliffe  R. P. Hackett  N. G. Ducharme 《Equine veterinary journal》2009,41(1):70-75

Reasons for performing study: The success of combined prosthetic laryngoplasty with ipsilateral ventriculocordectomy (LPVC) has not been compared to that of partial arytenoidectomy (PA) in a clinical population. Hypotheses: In Thoroughbred (TB) racehorses: 1) earnings after LPVC are unaffected by the severity of recurrent laryngeal neuropathy (RLN) (laryngeal grade III vs. grade IV); 2) LPVC and PA yield similar results in the treatment of grade III RLN; 3) performance outcome following PA is independent of diagnosis (RLN vs. unilateral arytenoid chondritis [UAC]); and 4) neither LPVC nor PA returns horses to the level of performance of controls. Methods: Medical and racing records of 135 TB racehorses undergoing LPVC or PA for the treatment of grade III or IV RLN or UAC were reviewed. Racing records of age and sex matched controls were also reviewed. Results: After LPVC, horses with grade III RLN performed better compared to those with grade IV RLN. Furthermore, horses treated for grade III RLN by LPVC showed post operative earnings comparable to controls. Rate of return to racing were similar for PA and LPVC, although LPVC resulted in higher post operative earnings. Performance after PA was similar regardless of diagnosis (UAC or RLN). Finally, neither LPVC when performed for grade IV RLN, nor PA performed for either diagnosis restored post operative earnings to control levels. Conclusions: Thoroughbred racehorses treated by LPVC for grade III RLN show significantly better post operative earnings compared to horses treated for grade IV disease. In grade III RLN, LPVC returns earning potential to control levels. PA and LPVC lead to similar success in terms of rate of return to racing, but PA leads to inferior earnings after surgery. Potential relevance: Laryngoplasty should be recommended for all TB racehorses with grade III RLN to maximise return to racing at a high level. This contradicts the common approach of waiting for complete paralysis.  相似文献   

The wild ostrich (<Emphasis Type="Italic">Struthio camelus</Emphasis>): a review     

R. G. Cooper  Kh. M. A. Mahrose  J. O. Horbańczuk  R. Villegas-Vizcaíno  S. Kennou Sebei  A. E. Faki Mohammed 《Tropical animal health and production》2009,41(8):1669-1678

The aim of the current report was to study the literature pertinent to wild populations of ostriches and their ecological and behavioural adaptations in the wild. Selected areas included palaeontology; ostrich distribution; conservation status and relationships with humans and habitat. There is an immediate and urgent need to conserve and protect the apparently rapidly declining populations of wild ostriches with the committed involvement of governments and funding bodies. Wildlife management is an important complement to the farming of livestock. Scientists need to understand the elements of ostrich behaviour in the wild in order to make informed decisions on their management and contact with other animals. Information of the like should be included in readily-accessible and annually updated wildlife manuals. We deemed that such information was an essential part in the conservation of this dwindling ratite.  相似文献   

Relaxant effect of aqueous extract of Cistus ladaniferus on rodent intestinal contractions     

Aziz M  Tab N  Karim A  Mekhfi H  Bnouham M  Ziyyat A  Melhaoui A  Legssyer A 《Fitoterapia》2006,77(6):425-428

The effects of the aqueous extract of Cistus ladaniferus leaves and stems were studied on the rodent isolated jejunum. The extract produced a reversible concentration dose-dependent (0.1-3 mg/ml) inhibition of the spontaneous motility of the rabbit jejunum. The inhibitory effects of the extract were not affected by pretreatment with the inhibitors of the alpha and beta adrenergic receptors yohimbine, prazosin or propranolol. The extract also inhibited K(+)-induced contractions in rabbit and rat jejunum at a similar concentration range. This result suggests that the antispasmodic action of the extract is mediated through calcium channel blockade. The results confirm the traditional use of C. ladaniferus in treating intestinal ache.  相似文献   

三个农林复合树种幼苗对施加磷肥的响应:生长和生节能力(英文)   总被引：1，自引：0，他引：1  

Mohammad Belal Uddin  Sharif Ahmed Mukul  Mohammed Abu Sayed Arfin Khan  Mohammed Kamal Hossain 《林业研究》2009,20(1):45-48

对苗床培养的楹树、雨豆树和水黄皮袋装幼苗(6月龄)施以80kg·hm-2的磷酸盐,通过比较不同收获间隔期幼苗生长和生节情况,研究了施加磷肥对三个农林复合树种幼苗生长和生节作用。研究表明,施加磷肥显著促进雨豆树和水黄皮幼苗生长,但并未促进楹树幼苗生长。此外,施加磷肥还会显著增加楹树、雨豆树幼苗生节数和节大小,但对水黄皮幼苗作用较小,而且高收割间隔期会降低水黄皮生节表现。  相似文献   

Effect of germination and subsequent oven-drying on folate content in different wheat and rye cultivars     

Mohammed Hefni  Cornelia M. Witthöft 《Journal of Cereal Science》2012

Cereals are recognised as an important food source of folate, and germinated cereals are reported to contain even more folate. This study examined the effects of germination and oven-drying on folate content in different wheat and rye cultivars. The native folate content in four wheat cultivars ranged from 23 to 33 μg/100 g dry matter (DM) and that in six rye cultivars from 31 to 39 μg/100 g DM. Mean folate content in rye was 25% higher than in wheat. Germination of both cereals resulted in a 4- to 6-fold increase in folate content, depending on cultivar and duration of germination. The highest folate content in both cereals was found after 96 h of germination and was 181 μg/100 g DM for cv. Kaskelott (rye) and 155 μg/100 g DM for cv. Kosack (wheat). Germination increased the amount of 5-CH₃–H₄folate in both cereals from 45 to 75%. Oven-drying of germinated wheat grains (for 48 and 72 h) at 50 °C did not affect the folate content. In conclusion, germination increases the folate content in wheat and rye cultivars, while subsequent oven-drying does not affect the folate content. Germination can therefore be recommended for producing bakery ingredients with increased folate content.  相似文献   

Vegetation cover density and disturbance affected arbuscular mycorrhiza fungi spore density and root colonization in a dry Afromontane forest,northern Ethiopia     

Emiru Birhane  Nakiguli Fatumah  Kidane Gidey  Amanuel Zenebe  Ssemwanga Mohammed 《林业研究》2018,29(3):675-686

Arbuscular mycorrhiza fungi(AMF) are vital in the regeneration of vegetation in disturbed ecosystems due to their numerous ecological advantages and therefore are good indicators of soil and ecosystem health at large. This study was aimed at determining how the seasonal, vegetation cover density, edaphic and anthropogenic factors affect AMF root colonization(RC) and spore density(SD)in Desa'a dry Afromontane forest. AMF RC and SD in the rhizosphere of five dominant woody species, Juniperus procera, Olea europaea, Maytenus arbutifolia, Carissa spinarum and Dodonaea angustifolia growing in Desa'a forest were studied during the rainy and the dry seasons in three permanent study vegetation cover density plots(dense, medium, and poor). Each plot(160 x40 m~2) has two management practices(fenced and unfenced plots) of area. A 100 g sample of rhizosphere soil from moisturefree composite soil was used to determine spore density.Spore density ranged from 50 to 4467 spores/100 g soil,and all species were colonized by AMF within a range of 4–95%. Glomus was the dominant genus in the rhizosphere of all species. Vegetation cover density strongly affected SD and RC. The SD was significantly higher(p 0.05) in the poor vegetation cover density than in the other two and lowest in the dense cover; root colonization showed the reverse trend. Management practices significantly(p 0.05) influenced AMF SD and RC, with the fenced plots being more favoured. Seasons significantly(p 0.05) affected RC and SD. More RC and SD were observed in the wet period than the dry period. Correlating AMF SD and RC with soil physical and chemical properties showed no significant difference(p 0.05) except for total nitrogen. Disturbance, vegetation cover density, season and total nitrogen are significant factors that control the dynamics and management interventions to maintain the forest health of dry Afromontane forests.  相似文献