Comparative effectiveness of organic and inorganic amendments on cadmium bioavailability and uptake by Pelargonium hortorum     

Gul  Iram  Manzoor  Maria  Hashim  Nosheen  Yaqoob  Khurram  Kallerhoff  Jean  Arshad  Muhammad 《Journal of Soils and Sediments》2019,19(5):2346-2356

Journal of Soils and Sediments - The aim of this study was to compare organic and inorganic amendments namely citric acid, ammonium nitrate, compost, and titanium dioxide nanoparticles (TiO2 NPs)...  相似文献   

Screening of essential oils from wild-growing plants in Tunisia for their yield and toxicity to the poultry red mite, Dermanyssus gallinae     

Zeineb Ghrabi-Gammar  David R. George  Amina Daoud-Bouattour  Imtinne Ben Haj Jilani  Samia Ben Saad-Limam  Olivier A.E. Sparagano 《Industrial Crops and Products》2009,30(3):441-443

A laboratory experiment was conducted with the poultry red mite Dermanysuss gallinae (De Geer) to assess the toxicity of a range of essential oils obtained from wild-growing plants in Tunisia to this pest. Details of the percentage essential oil yield from these plants were also recorded. For comparison, commercially sourced essential oil from Thymus vulgaris (L.) was also tested against D. gallinae after work elsewhere found this product to be acaricidal. Recently fed adult female D. gallinae were exposed to the essential oils at 0.1 mg oil/cm² in Petri-dishes at 22 °C over a period of 24 h.Results showed that the yield of essential oil varied considerably depending upon the source plant. Whilst maximum yields of 0.5% were achieved, three of the seven wild plants selected provided yields of less than 0.1%. Similar variability was recorded with respect to the toxicity of the essential oils to D. gallinae. Three of the essential oils tested did not cause significant D. gallinae mortality (in comparison to the control). However, all other selected oils provided mortality levels statistically similar to the 90% mortality achieved with commercial T. vulgaris essential oil, with the oil from Pelargonium graveolens (L’Hér.) killing 100% of D. gallinae exposed to it. Essential oil from P. graveolens in particular may be suitable for further development as a D. gallinae acaricide alongside or in place of commercial thyme essential oil.  相似文献   

玉米大豆混作系统氮素转移特性的研究   总被引：3，自引：1，他引：3  

季良  朱树秀 《华北农学报》1996,11(2):56-61

在不同氮水平土壤上用１５Ｎ同位素稀释法对玉米大豆混作系统氮素转移特性进行了研究。结果表明，低氮和高氮土壤上均发生了固氮产物的转移。低氮土壤混作玉米从大豆固氮产物中获得１４．９４％～２６．９６％的氮，在高氮土壤上仅获得２．５６％～２１．１３％的氮；混作大豆固氮率的提高率，低氮土壤为—１０．３６％～—２１．１４％，高氮土壤为２９．１０％～３２．６９％；混作玉米和混作大豆的植株含氮量，在低氮土壤中均比单作降低，而在高氮土壤上则有不同程度的提高。玉米大豆混作系统在低氮土壤上主要消耗土壤速效氮，在高氮土壤上主要消耗土壤全氮。  相似文献   

New data regarding distribution of cattle ticks in the south-western Indian Ocean islands     

Frédéric Stachurski  Pablo Tortosa  Patrick Rahajarison  Stéphanie Jacquet  Amina Yssouf  Karine Huber 《Veterinary research》2013,44(1):79

Recent studies have produced new insight into the origin and distribution of some cattle ticks in the south-western Indian Ocean islands. Rhipicephalus appendiculatus, introduced from Tanzania in 2002, is now well established on Grande Comore but has not yet reached the other islands of the archipelago (Mohéli, Anjouan and Mayotte). Only one of the two clades identified in Africa has settled so far. Amblyomma variegatum, which was not supposed to be able to persist in the Antananarivo region (1300 m) nor in other Malagasy regions of high altitude without regular introductions of ticks by infested cattle, is now endemic as a general rule up to 1600 m although other regions of lower altitude (1400 m) are still free of the tick. This species remains confined in a small area of the west coast on La Reunion Island. On the contrary, Hyalomma dromedarii could not settle on Madagascar where it was introduced in 2008 and Rhipicephalus evertsi evertsi is not yet present in Grande Comore despite regular introductions by infested cattle from Tanzania. A phylogeographic approach has been carried out at an intra-specific level for A. variegatum. This study has led to the identification of two main lineages, one covering all species distribution and one restricted to East Africa and the Indian Ocean area. These two lineages are in sympatry in Madagascar where a high genetic diversity has been described, whereas a lower genetic diversity is observed on other islands. These results seem to agree with the historical data concerning the introduction of the tick in the Indian Ocean area.  相似文献   

Methane Emissions from Aerated Zones in a Full-Scale Nitrifying Activated Sludge Treatment Plant     

Amina Aboobakar  Mark Jones  Peter Vale  Elise Cartmell  Gabriela Dotro 《Water, air, and soil pollution》2014,225(1):1-10

This study was performed to evaluate the ability of white-rot fungi to decolorize dye effluents. A total of 222 isolates of white-rot fungi were initially investigated to assess their ability to decolorize chemically different synthetic dyes in solid medium, resulting in selection of 25 isolates including four isolates of Berkandera adusta, five isolates of Ceriporia lacerata, three isolates of Irpex lacteus, one isolate of Perenniporia fraxinea, ten isolates of Phanerochaete spp., one isolate of Phlebia radiata, and one isolate of Porostereum spadiceum. Of the 25 isolates, B. adusta KUC9065, C. lacerata KUC8090, P. calotricha KUC8003, and P. spadiceum KUC8602 were finally selected on the basis of their ability to decolorize synthetic dyes in liquid medium, and were used to decolorize industrial effluents. B. adusta KUC9065 increased the transmittance of visible light by 71–92 %. Decolorization of wastewater by B. adusta KUC9065 was probably caused by the lignin-modifying enzymes produced by the fungus. In addition, the acute toxicity to Daphnia magna decreased from 2.5 to 2.1 and from 3.5 to 2.6 toxic units over 24 and 48 h, respectively.  相似文献