防病促生枯萎病拮抗菌“98-Ⅰ”对4种枯萎病防治效果研究   总被引：3，自引：0，他引：3  

马利平  乔雄梧  高芬  郝变青 《中国生态农业学报》2005,(1)

经 8年系统试验研究从 330个细菌菌株中筛选出 1株防病促生枯萎病拮抗菌“98 Ⅰ” ,经鉴定属蜡质芽孢杆菌。该菌对黄瓜枯萎病、西瓜枯萎病、青椒枯萎病和番茄枯萎病 4种土传病害均有显著防治效果 ,其平皿孢子萌发抑制率分别为 79 2 %、75 1%、72 3%和 95 7% ,且该菌对多种蔬菜有促生和促进种子发芽功效。  相似文献   

Vacuum Squeezing of Solids: Macroscopic Quantum States Driven by Light Pulses     

GA Garrett  AG Rojo  AK Sood  JF Whitaker  R Merlin 《Science (New York, N.Y.)》1997,275(5306):1638-1640

Femtosecond laser pulses and coherent two-phonon Raman scattering were used to excite KTaO3 into a squeezed state, nearly periodic in time, in which the variance of the atomic displacements dips below the standard quantum limit for half of a cycle. This nonclassical state involves a continuum of transverse acoustic modes that leads to oscillations in the refractive index associated with the frequency of a van Hove singularity in the phonon density of states.  相似文献   

APPLYING COLCHICINE TO PLANTS BY THE AEROSOL METHOD     

McKay JW  Burrell PC  Goodhue LD 《Science (New York, N.Y.)》1945,101(2615):154-156

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山东茶山植物群落结构及物种多样性     

高远  朱秀林  邱振鲁 《安徽农业科学》2007,35(16):4841-4843

茶山地处鲁东南地区,为全面了解其植物群落结构及物种多样性,2006年7月和10月对茶山植物群落结构及物种多样性进行野外调查,记录到高等植物352种,隶属90科250属,获得标准样方11个,面积6 600 m2。样方数据显示,该区域乔木种类匮乏,乔木层平均物种数2.55,Shannon-Wiener指数平均值0.48;灌木层平均物种数10.55,Shannon-Wiener指数平均值1.68。该区域受人为干扰影响显著,正处于群落演替早期,物种多样性偏低。  相似文献   

Effect of Anticoagulants and Sampling Time on Results of Progesterone Determination in Canine Blood Samples     

J Thuróczy  A Wölfling  A Tibold  L Balogh  GA Jánoki  L Solti 《Reproduction in domestic animals》2003,38(5):386-389

The concentration of plasma progesterone was measured by ELISA, in serum and samples prepared with three different anticoagulant agents – namely ethylenediaminetetraacetic acid (EDTA), heparine and sodium fluoride oxalate potassium(NaFK). Forty clinically healthy bitches were selected based on the signs of pro‐oestrus or oestrus. Values of progesterone concentration were significantly higher in serum than in EDTA‐plasma (p < 0.0005); heparin‐plasma (p < 0.05) and NaFK‐plasma (p < 0.005). During pro‐oestrus and oestrus until the time of ovulation, progesterone exhibited a conspicuous and statistically verified diurnal pattern (p < 0.05), its serum concentration being higher during 6.00–7.00 p.m. than 8.00–9.00 a.m. By the time of ovulation tendency of higher p.m. progesterone level reverses and from this point on the a.m. progesterone concentration is higher. The results of these experiments indicate that the concentration of canine progesterone assayed with ELISA may be affected by the time of collection and the method of preservation used.  相似文献   

The survival of platypus in captivity: a reappraisal with recommendations for veterinary management and future research     

M. SERENA  GA WILLIAMS 《Australian veterinary journal》1993,70(2):63-65

SUMMARY: Data are presented on the duration of survival of platypus held in the collections of the 5 Australian zoos displaying the species over the period 1987–1991. Of 10 living platypus, five had survived for 7 or more years. Similarly, of 10 captive animals that died during the period, six had survived for 6 or more years. Five purpose-caught animals were integrated into captive collections over the period; all of these were alive at the end of 1991. The high survival of captive platypus documented in this study contrasts with the conclusion of Whittington (1991) that the duration of survival of platypus in captivity is generally short. This primarily reflects differences in the nature of the two sets of data: Whittington's analysis was based on incomplete records dating back to 1934, and also categorised as managed in captivity those wild platypus that died at zoos while under veterinary care. A series of recommendations on current captive management issues includes the need for improved veterinary knowledge of platypus.  相似文献   

Evaluation of a regimen using a progesterone releasing intravaginal device (CIDR) and PMSG as a treatment for post partum anoestrus in dairy cattle     

TF. JUBB  P. BRIGHTLING  J. MALMO†  MT. LARCOMBE  GA. ANDERSON  SJ. HIDES‡ 《Australian veterinary journal》1989,66(10):334-336

Anoestrous dairy cows in seasonally calving herds in the Macalister Irrigation District of Gippsland, Victoria were treated at the start of the mating period with a progesterone releasing intravaginal device (CIDR). The CIDR was inserted for 7 days and 400 IU of PMSG was injected intramuscularly at removal. There was no clinically useful difference among cows receiving the CIDR, a placebo and untreated cows in the interval from treatment to either first oestrus or conception, the conception rate to first service or percent pregnant by the end of mating. Analyses of data from 2-year-old cows, older cattle, cows calved at least 45 days or cows calved at least 55 days and cows treated 3 weeks after the start of mating did not show improved reproductive performance following treatment with the CIDR.  相似文献   

Diarrhoea in Merino ewes during winter: association with trichostrongylid larvae     

JWA LARSEN  N ANDERSON†  AL VIZARD‡  GA ANDERSON‡  H HOSTE§ 《Australian veterinary journal》1994,71(11):365-372

SUMMARY A study on 3 farms, each having a preventive strategy for the control of nematode infections, determined the risk factors associated with diarrhoea among Merino ewes in winter. Comparisons were made among groups of mated and unmated ewes with and without treatment with controlled-release capsules containing albendazole. Diarrhoea was assessed from the accumulations of faeces around the breech (dag score) and related to worm egg counts, total worm counts and histopathological findings. The overall prevalence of severe dag in ewes not treated with a capsule was 26% (221/844). In comparison, only 2.7% of treated ewes had severe dag. The adjusted odds ratio on each farm indicated that untreated ewes were between 12 and 16 times more likely to be affected with severe dag than ewes treated with a capsule. The effect of lactation was significant on only one farm whereas initial body weight had no significant effect. There was no significant association between worm egg counts and the occurrence of severe dag. There were significantly more eosinophils in the small intestine of ewes affected with severe dag compared with unaffected ewes. There were no significant differences in mast cell and globule leucocyte numbers between affected and unaffected ewes. This study provides strong evidence that the main cause of diarrhoea among Merino ewes grazing winter and early spring pastures is the ingestion of trichostrongylid larvae even by sheep that have a well-developed protective immune response to these parasites. New strategies for the control of nematode infections are needed to prevent diarrhoea and dag formation in adult sheep.  相似文献   

Effect of reducing the boost dose of Fecundin® on the reproductive performances of previously vaccinated ewes     

KP CROKER  MA JOHNS  GA BROWN  FM SUNDERMAN 《Australian veterinary journal》1988,65(5):163-164

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Phloem transport of xenobiotics in Ricinus communis var. Gibsonii     

Keith Chamberlain  Michael M. Burrell  Dennis N. Butcher  Jean C. White 《Pest management science》1984,15(1):1-8

Whole plants of Ricinus communis var. Gibsonii were used to study the mobility of some xenobiotics in the phloem. Solutions of ¹⁴C- or ³⁵S-labelled test compounds were introduced directly into the hollow petiole of a leaf that was exporting assimilates. Translocation was monitored by collecting phloem exudate from an incision in the stem bark beneath the treated leaf. Using [³H]sucrose as an internal standard, qualitative and quantitative results were obtained for a variety of model compounds, including herbicides, fungicides and a nematicide.  相似文献