Uptake of residual phosphate and freshly applied diammonium phosphate by Lolium perenne and Trifolium repens     

Anne Gallet  Ren Flisch  Jean‐Pierre Ryser  Joseph Nsberger  Emmanuel Frossard  Sokrat Sinaj 《植物养料与土壤学杂志》2003,166(5):557-567

Residual fertilizer phosphorus (residual P) may significantly contribute to crop P nutrition. To test this hypothesis, a pot experiment was conducted with ryegrass (Lolium perenne) and clover (Trifolium repens) grown separately on three different soils which either had not received P fertilizer for at least nine years (0F) or had received P fertilizer equivalent to crop P off‐take (F). Soils in the pot experiment were given either none (0F, F) or a single rate of 15 mg P (kg soil)^–1 as diammonium phosphate (0F+DAP, F+DAP). In the treatments 0F+DAP and F+DAP DAP had been labeled with ³³PO₄ while in the treatments 0F and F the pool of available soil P had been labeled with carrier‐free ³³PO₄. This allowed estimating the quantities of P in plant dry matter that derived from native soil P, residual fertilizer P or fresh fertilizer P. Fourteen to 62 % of the P in the above ground biomass of white clover or perennial ryegrass were derived from residual P whereas 7 to 28 % were derived from freshly applied DAP. The proportion of P derived from residual P was correlated to the total amount of P fertilizer added to the soils, while the proportion of P derived from DAP was correlated to the concentration of P in the soil solution of the 0F and F soils.  相似文献   

Mapping wound-response genes involved in post-harvest physiological deterioration (PPD) of cassava (Manihot esculenta Crantz)   总被引：6，自引：0，他引：6  

Diego Fernando Cortés  Kim Reilly  Emmanuel Okogbenin  John R. Beeching  Carlos Iglesias  Joe Tohme 《Euphytica》2002,126(1):47-53

The genome locations of the wound-response genes that were expressedduring the post-harvest physiological deterioration (PPD) of cassava, suchas phenylalanine ammonia lyase, -1.3 glucanase, hydroxyprolinerich glycoprotein, catalase, 1-aminocyclopropane 1-carboxylate, cysteineprotease inhibitor, aspartic protease, a partial cDNA for serine/threonineprotein kinase and peroxidase, have been identified on the frameworkmolecular genetic map of cassava. Also, molecular markers linked toputative quantitative trait loci (QTLs) influencing PPD of cassava weremapped using an F₁mapping population derived from elite parentallines (TMS 30572 × cm 2177-2). A molecular linkage map previouslyconstructed based on the segregation of 240 RFLP, 100 RAPD, 85microsatellite and five isoenzyme markers on 144 F₁ individuals wasused for the QTL mapping.A set of 10 molecular markers with a significant association with putativeQTLs for PPD were identified based on probability values < 0.005in order to minimize the detection of false positives. Based on single-markerregression, eight putative QTLs located on the linkage groups G, P, L, U,and X of the female-derived framework map were found to explain between 5–12% of the phenotypic variance of the PPD. In the male-derived frameworkmap, two putative QTLs on linkage groups C and L explained 13% and11% of this variance, respectively. This study thus identified the majorgenome regions of cassava related to physiological post-harvestdeterioration, thereby providing tools for the identification of gene(s)controlling this trait.  相似文献   

Diagnosis and treatment of demodicosis in dogs and cats     

Ralf S. Mueller  Wayne Rosenkrantz  Emmanuel Bensignor  Joanna Kara‐T&#x;cza  Tara Paterson  Michael A. Shipstone 《Veterinary dermatology》2020,31(1):4-e2

  相似文献   

Acaricidal efficacy against cattle ticks and acute oral toxicity of Lippia javanica (Burm F.) Spreng     

Madzimure J  Nyahangare ET  Hamudikuwanda H  Hove T  Stevenson PC  Belmain SR  Mvumi BM 《Tropical animal health and production》2011,43(2):481-489

Tropical Animal Health and Production - In search for low-cost, safe and environmentally benign plant-based alternatives to commercial pesticides, the efficacy of Lippia javanica aqueous leaf...  相似文献   

Characteristics of Effluents from Central Arkansas Baitfish Ponds     

Melinda J.  Bodary  Nathan  Stone  Steve E.  Lochmann Emmanuel  Frimpong 《Journal of the World Aquaculture Society》2004,35(4):489-497

Scientific information on baitfish effluents is important to provide a basis for the development of appropriate and cost-effective management practices that minimize environmental impacts. Effluents from 10 commercial golden shiner Notemigonus crysoleucas ponds in central Arkansas were sampled December 2000 through June 2001. Grab samples of the first and last 10% of pond volume were collected during intentional draining events. Effluents were sampled as they exited pond drainpipes and at the ends of drainage ditches just prior to stream discharge. Concurrent receiving stream samples were collected upstream and downstream of the discharge point. Total nitrogen (TN), total phosphorus (TP), 5-d biochemical oxygen demand (BOD_S), and total suspended solids (TSS) of each sample were measured. Mean whole effluent concentrations for the first 10% were 36 mg TSS/L, 9 mg/L BOD₅, 2 mg TN/L, and 0.5 mg TP/L. The water quality of the first and last 10% of pond effluent were not significantly different ( P < 0.05). Filtering effluents through a 5-pm mesh screen did not significantly reduce nutrient concentrations. Serial fractionation of effluents resulted in small but significant decreases in TSS concentrations in samples filtered through the 10, 8, and 5-μm meshes ( P < 0.05). Effluent discharge through farm ditches generally did not improve effluent water quality. Effluents collected at ditch ends were significantly less than drainpipe samples in BOD, concentrations only ( P < 0.05). Limited data on receiving stream water quality indicated that only TP concentrations were greater in pond effluents than in receiving streams. Overall, baitfish pond effluents are similar in composition to effluents of other phytoplankton-based pond production systems.  相似文献   

TSE detected in a Belgian ARR-homozygous sheep via active surveillance     

De Bosschere H  Roels S  Dechamps P  Vanopdenbosch E 《Veterinary journal (London, England : 1997)》2007,173(2):449-451

It is commonly accepted that scrapie-resistance and -susceptibility in sheep are genetically controlled. Consequently, the selection of sheep with scrapie-resistant genotypes is currently one of the most important objectives of the sheep breeding associations. However, during the last two years, new data have become available on transmissible spongiform encephalopathy (TSE) cases in TSE-resistant sheep in several European Union member states. The present paper describes the first Belgian natural "atypical" TSE case in a sheep with a scrapie-resistant genotype (ARR/ARR) detected via active surveillance. No other infections or diseases were detected in the source flock. The continued finding of new "atypical" TSE cases in sheep with scrapie-resistant genotypes undermines the purpose and efficacy of the breeding programs.  相似文献   

Nematode dermatitis due to Angiostrongylus vasorum infection in a dog          下载免费PDF全文

Paola Cavana  Emmanuel Bensignor  Stéphane Blot  Marine Carlus  René Chermette  Odile Crosaz  Felix Grimm  Murielle Hurion  Aurélien Jeandel  Bruno Polack 《Veterinary dermatology》2015,26(4):293-e65

  相似文献   

Seed morphological characteristics,storage behavior,and germination pattern of Combretum indicum (L.) DeFilipps     

Gentallan  Renerio P.  Bartolome  Michael Cedric B.  Cejalvo  Reneliza D.  Timog  Emmanuel Bonifacio S.  Altoveros  Nestor C.  Borromeo  Teresita H.  Endonela  Leah E. 《Genetic Resources and Crop Evolution》2021,68(7):2767-2773

Genetic Resources and Crop Evolution - Combretum indicum (L.) DeFilipps seeds have anthelmintic properties and are recognized to be medicinal; however, the array of their morphological characters,...  相似文献   

Comment: Pilot-Scale Test for a Phosphate Treatment Using Sulfate-Coated Zeolite at a Sewage Disposal Facility by Jae-Woo Choi,Kyu-Sang Kwon,Soonjae Lee,Byungryul An,Seok-Won Hong,Sang-Hyup Lee     

Emmanuel I. Unuabonah  Nurudeen A. Oladoja 《Water, air, and soil pollution》2014,225(6):1-2

The article, Pilot-Scale Test for a Phosphate Treatment Using Sulfate-Coated Zeolite at a Sewage Disposal Facility by Jae-Woo Choi, Kyu-Sang Kwon, Soonjae Lee, Byungryul An, Seok-Won Hong, Sang-Hyup Lee, is replete with some fundamental scientific flaws which have the potential to misinform readers. This comment seek to correct these flaws.  相似文献   

In winter wheat (Triticum aestivum L.), post-anthesis nitrogen uptake and remobilisation to the grain correlates with agronomic traits and nitrogen physiological markers     

Thomas Kichey  Bertrand Hirel  Emmanuel Heumez  Frédéric Dubois  Jacques Le Gouis 《Field Crops Research》2007

In wheat, nitrogen (N) uptake and remobilisation after flowering contributes largely, in Northern countries, to grain yield and grain protein content. The aim of our study was first to estimate the proportion of N taken up and remobilised to the grain as well as their relative efficiency using ¹⁵NO₃⁻-labelling at flowering. The validity of the technique was assessed in comparison to the N budget calculation method on five winter wheat cultivars grown for 2 years at low and high fertilization input. We estimated that on average 71.2% of grain N originates from remobilisation with significant genotypic differences. Among the five genotypes, significant differences were also found for both N remobilisation efficiency (from 69.8 to 88.8%) and N translocation efficiency (from 89.7 to 93.4%). In parallel, during 1 year, we monitored physiological markers representative of N assimilation and recycling at two sampling dates during the grain filling period. We then examined if there was any relationship between these physiological markers, N absorption and remobilisation estimates and agronomic traits related to yield and grain N content. Nitrate reductase (NR) activity was highly correlated to N absorbed post-flowering and to grain protein content. Glutamine synthetase (GS) activity was even more highly correlated than NR activity to the amount of N remobilised and grain yield. The use of physiological traits such as NR and GS activities as markers of the wheat N status is discussed.  相似文献