THE SPHERE OF BACTERIOLOGY     

Jordan EO 《Science (New York, N.Y.)》1904,20(516):657-666

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The Cell Characteristics of Apple Chat Fruit     

R. O. Sharples 《The Journal of Horticultural Science and Biotechnology》2013,88(3):383-384

In two successive seasons, fruit from Lord Lambourne apple trees infected with chat-fruit virus contained fewer cells at harvest. The volume of the cortical cells of such fruit also tended to be smaller and it is suggested that this virus exerts a general retarding effect on fruit growth rather than affecting either cell division or enlargement only.  相似文献   

The Effect of a Growth Retardant Compound (B4) on Phaseolus Beans     

E. O. Lucas  G. M. Melbourn  H. F. Taylor 《The Journal of Horticultural Science and Biotechnology》2013,88(2):239-244

When the growth retardant B₄ was applied to Phaseolus beans at the primary leaf stage or at one week before flowering, a temporary dwarfing effect occurred and less total vegetative growth was produced. Although these pre-flowering treatments delayed the production of peak pod numbers, no effect on final seed yield occurred. In contrast, an application of B₄ during the early pod-fill stage gave a less marked reduction in vegetative tissue, but increased seed yield by 16%. It is suggested that this extra yield may have resulted from a reduction in pod shading by leaves which enabled a greater direct contribution to seed yield from pod photosynthesis. Alternatively, a restriction in growth of new leaves may have given a greater transfer of assimilate to the pods from older leaves.  相似文献   

A COMPARISON OF NUTRIENT LOSSES IN BALED HAY MADE FROM FORAGE-HARVESTED, CRIMPED OR TEDDED SWARDS WITH THOSE IN BARN-DRYING     

J. A. M. Kerr  W. O. Brown 《Grass and Forage Science》1965,20(3):156-163

Two experiments were conducted to study the effect on nutrient loss and feeding value of making hay by different means, using a barn-drier, a forage-harvester, a crimper and conventional tedding. Both forage-harvesting and crimping of the herbage significantly increased the rate of drying, compared with tedding alone. In Exp. 2 this effect enabled the crimped and forage-harvested hays to be baled for storage 3 days earlier than the tedded hay. The use of the forage-harvester significantly reduced the yield of herbage compared with conventional mowing. Nutrient losses from cutting until storage were highest for the forage-harvested hays, the loss of dry matter between cutting and storage in the forage-harvested hays being 39·9 and 19·3%, respectively, in Expt 1 and 2 with corresponding losses in the conventionally made hays of 7·1% and 9·3%. Crimping the hay resulted in higher nutrient losses than tedding. In Expt 2 there was a loss of dry matter of 17·5% in the conventionally made hay during an 18-week storage period, compared with 3·6% in barn-dried hay, 10·8% in forage-harvested hay and 8·8% in crimped hay.
In Expt 2, in which digestibility determinations were made, conservation decreased the total digestible nutrients and starch equivalent in all treatments. The use of the barn-drier gave the most efficient conservation of total digestible nutrients, followed by the crimped, forage-harvested and conventional treatments in that order. The starch equivalent values of hays made from the same sward were 43·0 when barn-dried, 39·8 when crimped, 38·6 after forage-harvesting and 31·6 after tedding.  相似文献   

Effects of Water Deficit on the Dynamics of Flowering and Fruit Production in Capsicum chinense Jacq in a Tropical Semiarid Region of Venezuela     

R. E. Jaimez  O. Vielma  F. Rada  C. García-Núñez 《Journal of Agronomy and Crop Science》2000,185(2):113-119

The degree of crop sensitivity to water deficit, during the different developmental stages of a plant, is an important aspect to consider in tropical semiarid regions. The effect of water deficit on flowering dynamics and fruit production of sweet pepper (Capsicum chinense) was evaluated under several water regimes, during three consecutive years. A complete randomized block design with three replicates was employed. Flowering dynamics and fruit production were measured weekly, and water potentials were obtained twice during the experiments. For all years, flowering began at approximately 70 days after transplanting. In the most favourable year (trial 1996), there were no differences in total flower and fruit production in terms of irrigation frequency. For the other less favourable years, flowering and fruit production were significantly different between irrigation frequencies. Our results show that low water availability, prior to flowering, reduces the number of flowers produced and retards the occurrence of maximum flowering. On the other hand, a water deficit during the period between flowering and fruit development reduces final fruit production. This suggests that a water deficit during this last stage affects final yield to a greater extent.  相似文献   

Actinobacillus pleuropneumoniae osteomyelitis in pigs demonstrated by fluorescent in situ hybridization.     

T K Jensen  M Boye  T Hagedorn-Olsen  H J Riising  O Angen 《Veterinary pathology》1999,36(3):258-261

Necrotizing osteomyelitis and fibrinopurulent arthritis with isolation of Actinobacillus pleuropneumoniae serotype 2 is reported in two pigs from a herd with lameness and mild coughing problems among 8 to 12-week-old pigs. Application of fluorescent in situ hybridization targeting 16S ribosomal RNA of A. pleuropneumoniae in formalin-fixed tissue was performed to verify the association of A. pleuropneumoniae with the bone and joint lesions. By in situ hybridization A. pleuropneumoniae was demonstrated as multiple microcolonies or single cells dispersed in focal fibrinonecrotizing pleuropneumonia, in joints with arthritis, and in bone necroses including lysis of growth plate and suppurative inflammation in the adjacent trabecular metaphysis, thus demonstrating that well-known infections manifest new, unusual lesions.  相似文献   

BSE, bovine spongiform encephalopathy     

U Truyen  O R Kaaden 《Tier?rztliche Praxis》1990,18(5):463-468

Bovine spongiform encephalopathy, first described in 1985, has led to serious economical problems in the United Kingdom within a few years. In this review, the clinical picture, pathological findings and the etiologic and epizootiologic history of the disease are summarized. The potential threat to the Continental cattle population and the potential risk to human health are critically discussed. The known methods of diagnosis of the disease are also described.  相似文献   

A routine 20-22 days post-service milk progesterone monitoring in dairy cows. Economic evaluation     

O Markusfeld  H Adler  N Nahari  D Kastner 《The British veterinary journal》1990,146(6):504-508

Three hundred and sixty inseminated Holstein cows were monitored in a controlled trial for low milk progesterone concentration 21-23 days post-breeding. Information about low progesterone cows was given to herdsmen for the experimental group only. Of the cows in the experimental group with milk progesterone of less than or equal to 4.5 ng/ml, 56.0% were inseminated within 2 days of monitoring compared to 28.8% of the control animals. Of the cows reaching the 42-day rectal pregnancy diagnosis, 13.7% and 43.6% were negative for the experimental and the control groups respectively. Inter-service intervals were 34.5 +/- 14.5 days and 44.3 +/- 17.7 days for the experimental and control groups respectively. Pregnancy rates were the same for 264 cows served on routine progesterone monitoring and for 318 cows bred on behavioural oestrus when matched to farm and day of breeding. A gain of US $32.5 (an equivalent of 85 l milk) per lactation for a cow in the monitored herd was established using the data in a model of a 250-cow herd with a total pregnancy goal of 82.4%.  相似文献   

Some Pharmacokinetic Parameters of Oxfendazole in Sheep     

Soraci  A.L.  Mestorino  N.  Errecalde  J.O. 《Veterinary research communications》1997,21(4):283-287

Soraci, A.L., Mestorino, N. and Errecalde, J.O., 1997. Some pharmacokinetic parameters of oxfendazole in sheep. Veterinary Research Communications, 21 (4), 283-287  相似文献   

Hypoadrenocorticism in young related Nova Scotia duck tolling retrievers.   总被引：1，自引：0，他引：1       下载免费PDF全文

S Burton  J DeLay  A Holmes  C Somerville  J Eye  D Shaw  O Wack    P Hanna 《The Canadian veterinary journal. La revue veterinaire canadienne》1997,38(4):231-234

Five cases of hypoadrenocorticism in young related Nova Scotia duck tolling retrievers are discussed. Two were littermates and the others shared one or more common ancestors. No specific mode of inheritance was determined. Clinical and laboratory findings typical of hypoadrenocorticism were observed. Further documentation will be required to confirm a breed predisposition.  相似文献