|
|
|
|
|
| Lima,Claudinei Paulo de; Backes,Clarice; Villas Bôas,Roberto Lyra; Oliveira,Mauricio Roberto de; Kiihl,Tammy Aparecida Manabe; Freitag,Elisa Eni. |
| Of all nutrients, N has the strongest effect on grass growth and an adequate N fertilization can reduce the time required for the formation of high-quality mats. This study aimed to evaluate the influence of N fertilization on Bermuda grass sod production and quality. The experiment was conducted in an area of commercial sod production, in Capela do Alto, state of São Paulo. Cynodon dactylon (Pers) L., known as Bermuda grass, was evaluated in a randomized complete block design with five treatments and four replications. Treatments consisted of five N rates: 0, 150, 300, 450 and 600 kg ha-1. Increasing N applications to Bermuda grass increased the soil cover rate, reducing the time required for mat formation. The accumulation of rhizome + root + stolon dry... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cynodon dactylon (Pers) L; Fertilization rate; Soil cover. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000200010 |
| |
|
|
| Horri, Khaled; Alfonso, Sebastien; Cousin, Xavier; Munschy, Catherine; Loizeau, Veronique; Aroua, Salima; Begout, Marie-laure; Ernande, Bruno. |
| Polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) are persistent organic pollutants that have been shown to affect fish life-history traits such as reproductive success, growth and survival. At the individual level, their toxicity and underlying mechanisms of action have been studied through experimental exposure. However, the number of experimental studies approaching marine environmental situations is scarce, i.e., in most cases, individuals are exposed to either single congeners, or single types of molecules, or high concentrations, so that results can hardly be transposed to natural populations. In the present study, we evaluated the effect of chronic dietary exposure to an environmentally realistic marine mixture of PCB and... |
| Tipo: Text |
Palavras-chave: Contaminants; Body length; Condition; Fertilization rate; Energy allocation; Trade-off. |
| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00396/50694/51450.pdf |
| |
|
|
| Ewing, Patrick M; University of Minnesota, Department of Agronomy and Plant Genetics ; ewing069@umn.edu; Runck, Bryan C; University of Minnesota, Department of Geography, Environment and Society; runck014@umn.edu. |
| The importance of corn production to the midwestern United States cannot be overestimated. However, high production requires high nitrogen fertilization, which carries costs to environmental services such as water quality. Therefore, a trade-off exists between the production of corn yield and water quality. We used the Groundwater Vulnerability Assessment for Shallow depths and Crop Environment Resource Synthesis-Maize models to investigate the nature of this trade-off while testing the Simple Analytic Framework trade-offs featured in this Special Feature. First, we estimated the current levels of yield and water quality production in northeastern Iowa and southern Minnesota at the 1-square-kilometer, county, and regional scales. We then constructed an... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Agriculture; Agroecology; Corn belt; DSSAT; Fertilization rate; Frontier analysis; Groundwater nitrate; GWAVA-S; Land use; Nitrogen; Rotation; Row crops; Simple Analytics Framework; Yield. |
| Ano: 2015 |
|
| |
|
|
| Agostinho,Claudio Angelo; Wechsler,Francisco Stefano; Castro,Cecilia Silva de; Agostinho,Lucas Miyabara; Ribeiro,Raphaela Rezende; Agostinho,Sueli Matiko Miyabara. |
| It was analyzed in this work the influence of photoperiod on time interval from ovulation induction period to extrusion of ovocits in female bullfrogs (Lithobates catesbeianus). It was used 54 females reared from metamorphosis to 9 months of age under three photoperiods: dark time (DL 0:24), 16 hours of daylight (DL 16:8) and 12 hours of daylight (DL 12:12). Ovulation was induced by intramuscular application of two doses of LHRHa with 12 hours of interval between the injections. After 10, 25, 28, 31, 34 and 37 hours from the first hormone injection, 10-gram samples (3,000 eggs) were extracted from each female at each time interval and fertilized. Egg hatching rate was checked in each sample 72 hours after fertilization. Analysis of variance showed a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artificial fertilization; Controlled reproduction; Fertilization rate; Frog reproduction; Lithobathes catesbeianus; Spawning. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000800001 |
| |
|
|
|
