Nitrogen fertilizer and urease inhibitor effects on canola seed quality in a one-pass seeding and fertilizing system   总被引：1，自引：0，他引：1  

Cynthia A. Grant  Doug A. Derksen Debra L. McLaren  R. Byron Irvine 《Field Crops Research》2011,121(2):201-208

Field studies were conducted over three years on a clay loam (CL) and fine sandy loam (FSL) soil on the eastern Canadian prairies to evaluate the impact of urea and urea ammonium nitrate (UAN), with or without the urease inhibitor N-(n-butyl) thiophosphoric triamide (NBPT), placed near the seed-row in a one-pass seeding and fertilizing operation on seed protein, oil, chlorophyll and glucosinolate content of canola (Brassica napus L.). Application of N fertilizer as a side-band application at the time of seeding increased protein concentration and decreased oil concentration. Protein and oil yield increased with low to moderate N rates, but stabilized or fell with high N rates due to reductions in yield from seedling toxicity. Both chlorophyll and glucosinolate concentrations increased with increasing N rates. Use of UAN led to higher protein, chlorophyll and glucosinolate and lower oil concentration than urea on the CL soil. Use of the urease inhibitor NBPT generally increased oil concentration on both soils and reduced the chlorophyll and glucosinolate concentration on the CL soil. Observed difference may have been due to delayed maturity and reduced stand density caused by seedling damage and high N rates. High N rates applied as a side-band of urea or UAN near the canola seed row can negatively influence both seed yield and quality in canola and the negative effects may be reduced by the use of the urease inhibitor NBPT.  相似文献   

Quantitation of bovine viral diarrhea virus in embryo transfer flush fluids collected from a persistently infected heifer.     

K V Brock  D R Redman  M L Vickers  N E Irvine 《Journal of veterinary diagnostic investigation》1991,3(1):99-100

  相似文献   

Emeritus Professor Brian Moss          下载免费PDF全文

Kenneth Irvine 《水产资源保护:海洋与淡水生态系统》2016,26(4):615-618

  相似文献   

Synthesis and characterization of synthetic analogs of cinnacidin, a novel phytotoxin from Nectria sp     

Irvine NM  Yerkes CN  Graupner PR  Roberts RE  Hahn DR  Pearce C  Gerwick BC 《Pest management science》2008,64(9):891-899

BACKGROUND: The novel natural product cinnacidin was isolated from a fungal fermentation extract of Nectria sp. DA060097. The compound was found to contain a cyclopentalenone ring system with an isoleucine subunit linked through an amide bond. Initial biological characterization of cinnacidin suggested promising herbicidal activity. RESULTS: Two synthetic analogs, (2S,3S)-2-[(3RS,3aSR,6aRS)-3-methoxy-4-oxo-3,3a,4,5,6,6a-hexahydropentalen-1-ylcarbamoyl]-3-methylvaleric acid and benzyl (2S,3S)-2-[(3RS,3aSR,6aRS)-3-methoxy-4-oxo-3,3a,4, 5,6,6a-hexahydropentalen-1-ylcarbamoyl]-3-methylvalerate, were prepared for further characterization, and their herbicidal activities were compared with that of cinnacidin. CONCLUSIONS: The synthetic compounds were highly phytotoxic on a range of weeds. Based on the symptoms in treated plants, the mode of action of these compounds is suggested to be similar to that of coronatine and jasmonic acid. Coronatine was more active against warm-season grasses, while the cinnacidin benzyl ester analog was more effective on cool-season grasses. In a seedling growth bioassay conducted on bentgrass, the cinnacidin analog was equivalent in activity to coronatine.  相似文献   

Effect of season and pregnancy on total plasma thyroxine concentrations in sheep     

R L Sutherland  C H Irvine 《American journal of veterinary research》1974,35(2):311-312

  相似文献   

Effectiveness of a two-dose regimen of prostaglandin administration in inducing luteolysis without adverse side effects in mares     

Irvine CH  McKeough VL  Turner JE  Alexander SL  Taylor TB 《Equine veterinary journal》2002,34(2):191-194

Our objectives were to determine whether repeated administration of prostaglandin F2alpha (PGF2alpha) to simulate the endogenous mode of secretion would be more effective than a single injection in inducing luteolysis and enable use of smaller doses less likely to cause adverse side effects. The main study comprised 43 dioestrous mares, who were given im. either a single 10 mg dose of natural PGF2alpha (n = 22) or 2 doses of 0.5 mg PGF2, 24 h apart (n = 21). The intensity of side effects was assessed in 8 dioestrous mares given 5, 1.5, 0.5 or 0 mg PGF2alpha in consecutive cycles. Two doses of 0.5 mg PGF2alpha 24 h apart caused lysis of the corpus luteum in all mares, whether this was determined from a fall in plasma progesterone concentrations or reproductive tract/behavioural changes; and when 10 mg PGF2, was given, the corpus luteum was lysed in 17 of 22 mares i.e. a lower proportion (P = 0.0485). A single dose of 0.5 mg PGF2a was no more effective than saline in inducing luteolysis.The intensity of side effects of PGF2alpha increased with dose. Although the 0.5 mg dose was no more likely than saline to cause sweating or muscle spasms, it raised plasma cortisol concentrations and prevented the decline in heart rate seen after saline. We conclude that a 2 dose regimen of administration increases the luteolytic efficacy of PGF2alpha and thereby provides a way to minimise adverse side effects.  相似文献   

Use of moxidectin treatment in the investigation of abomasal nematodiasis in wild reindeer (Rangifer tarandus platyrhynchus)     

Irvine RJ 《The Veterinary record》2000,147(20):570-573

An experiment was conducted to evaluate moxidectin as a tool for understanding the impact of parasitism on wild Svalbard reindeer (Rangifer tarandus platyrhynchus). Adult females were injected subcutaneously with moxidectin at a dose rate of 0-4 mg/kg bodyweight, and groups of animals were culled within its expected period of efficacy (around 14 days) or around 12 or 24 weeks after treatment. Moxidectin was effective in eliminating the reindeers' abomasal worm burdens, and although they became reinfected, worm burdens were significantly lower in the treated animals compared to the untreated controls for up to 24 weeks after treatment. Nematode eggs did not reappear in faeces until five weeks after treatment, a similar period to that claimed by the manufacturer for sheep and cattle. Animals culled 12 and 24 weeks after treatment had been reinfected and harboured a wide range of abomasal worm burdens which contributed to the understanding of the seasonal variation in the relationship between faecal egg count and worm burden.  相似文献   

Total plasma thyroxine concentrations in horses, pigs, cattle, and sheep: anion exchange resin chromatography and ceric-arsenite colorimetry     

R L Sutherland  C H Irvine 《American journal of veterinary research》1973,34(10):1261-1265

  相似文献   

Gonadotropin-releasing hormone     

Clifford H.G. Irvine B.V.Sc.  D.Sc.  F.A.C.V.Sc. 《Journal of Equine Veterinary Science》1983,3(5):168-170

  相似文献   

Sampling of masu salmon,Oncorhynchus masou,spawners on the spawning grounds: is carcass sampling effective as a mark–recovery method?     

Y. Miyakoshi  T. Takami  K. Takeuchi  H. Omori  M. Nagata  J. R. Irvine 《Fisheries Management and Ecology》2003,10(4):273-275

  相似文献