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阿克苏地区2000-2001年从山东省农科院引进强筋面包小麦新品种济南17号,在地区农业试验站进行品种区域适应性比较试验,并对其生育和植株性状进行了观测,在参试的8个品种中,济南17号平均产量6804kg/hm2,位居第三,较对照邯5316(地区小麦主栽品种)增产840kg/hm2,增产率14%。2001-2002年又在地区农业试验站对该品种示范种植800.04m2,产量8550kg/hm2,首次实现本地区引种面包小麦单产超8250kg/hm2的产量水平,两年试验示范结果表明,该品种在阿克苏地区具有较强的适应性和丰产性,同时取得了实现强筋小麦济南17号高产栽培的实践经验。 相似文献
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TF. JUBB J. MALMO† P. BRIGHTLING GA. ANDERSON GM. DAVIS† 《Australian veterinary journal》1989,66(11):354-358
Details were recorded of 47 cases of coxo-femoral dislocation observed in cattle over 1 year. Treatment was successful in 20/47 (42.6%) cases using a method of closed reduction. Factors that most strongly influenced the prognosis were identified. The most useful single prognostic factor was whether the cow was able to stand before reduction. Other factors that also had a strong positive influence on the prognosis were: age less than 3y, bodyweight less than 400kg and duration of dislocation less than 12h. Nineteen unsuccessful cases were examined at the knackery. Four were found to have a fracture of the proximal femur. The coxo-femoral joint was carefully dissected in the other 15 cases and there was no evidence of hip dysplasia. A seasonal incidence of dislocations, which coincides with the calving and mating periods, was demonstrated during the survey and from practice records for the previous 3 years. 相似文献
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Martin Hughes Victor Mlambo Cicero HO Lallo Paul GA Jennings 《African Journal of Range and Forage Science》2016,33(4):253-264
This study evaluated whether the FieldScout CM 1000 NDVI and Yara N–Tester models can produce accurate and reliable estimates of nitrogen (N), buffer-soluble nitrogen (BSN), buffer-insoluble nitrogen (BISN), non-protein nitrogen (NPN) and in vitro ruminal nitrogen degradability after 3, 12 and 24?h incubation (ND3, ND12 and ND24) in three tropical grasses: Brachiaria hybrid, Megathyrsus maximus and Paspalum atratum. Correlation between the Yara N-Tester and N, BISN and in vitro ruminal N degradability of the Brachiaria hybrid and M. maximus were high (r 0.67–0.83). The Yara N-Tester accounted for 81% and 86% (p 0.000) of N variability in the Brachiaria hybrid and M. maximus, respectively. The Yara N-Tester prediction models explained 72% and 70% (p 0.000) BISN variability in the Brachiaria hybrid and M. maximus, respectively. In vitro ND24 of the Brachiaria hybrid (R?2 0.75) and M. maximus (R?2 0.75) was also best predicted with the Yara N-Tester. Model validation showed generally low (≤0.90) concordance correlation coefficients except for Yara N-Tester N and ND24 in M. maximus. Random error was the main source of error. We conclude that the accuracy of the Yara N-Tester prediction models was superior to that of the FieldScout CM 1000 NDVI models, and that the Yara N-Tester can produce accurate and reliable estimates of Brachiaria hybrid and M. maximus N and M. maximus ND24. 相似文献
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高微 《湖南农业大学学报(自然科学版)》2009,(2)
从音乐本身出发,从琵琶音乐语言和琵琶音乐表达的技术手段两方面对琵琶音乐语言的表现力作出作者自身的理解.琵琶音乐语言的表现力是多元性的,可以从琵琶音乐语言特性的界定以及琵琶音乐表达的技术手段来了解. 相似文献
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JW BROWNING GA MEIN† P. BRIGHTLING† TJ NICHOLLS† M. BARTON† 《Australian veterinary journal》1994,71(6):179-181
SUMMARY The effects of three selection strategies for dry cow therapy on prevention of new infections and rate of antibiotic usage were compared. Quarter infection status of 1044 cows in 12 herds was determined by bacteriological methods at drying off, calving and three to five months into the following lactation. Cows that were uninfected at drying off were randomly allocated to treatment (whole udder, dry cow therapy) and non-treatment groups. Infected cows were randomly allocated to whole udder or infected quarter only treatments. The strategies compared were blanket treatment (treat all quarters of all cows), selective cow treatment (treat all quarters of any cow infected in one or more quarters) and selective quarter treatment (treat infected quarters only). Selective cow treatment was identified as the preferred strategy. Blanket treatment resulted in increased antibiotic usage (15.5 vs 6.4 tubes per infection eliminated) with no additional benefit, and selective quarter treatment resulted in a higher new infection rate (6.4%vs 3.9% quarters) in the dry period. The prevalence of infection within a herd at drying off had no influence on new infection rates in the dry period or early lactation. The cure rate after dry cow treatment (mean of 66%) decreased significantly with increasing age (P < 0.001). Cows infected in the previous lactation contributed over 76% of infections at calving and nearly 70% at mid-lactation. To lower the incidence of mastitis in a herd, a greater emphasis on culling of older infected cows and prevention of new infections during lactation is needed. 相似文献
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