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1.
通过对特晚熟‘立冬本’龙眼在宁德区域生长发育特性观察,从树形培育与修剪、营养管理、控梢与促花、果实大小及品质发育调控、病害与虫害控制、果实延迟采收、防寒防冻 等方面总结一套‘立冬本’龙眼栽培技术,并对‘立冬本’及当地主栽品种‘福眼’近三年种植效益进行对比分析,‘立冬本’具有晚熟、产量高,市场售价高,经济效益好等特点。。  相似文献   

2.
为深入认识蓝莓的生物学积累基础资料,及生产栽培管理提供科学依据,本研究连续三年对‘蒂芙蓝’、‘芭尔德温’、‘S13’和‘粉蓝’四个兔眼蓝莓品种的开花结果和枝梢生长物候期,以及枝芽特性进行调查。调查结果表明,‘粉蓝’和‘S13’的果实成熟期较早,于6月中旬开始成熟,‘巴尔德温’的成熟期最晚于7月上旬成熟。四个品种的萌芽率均为50%左右,‘粉蓝’的成枝力显著高于其他三个品种。从枝梢类型来看,四个品种均以中枝为主,‘粉蓝’的长枝比例显著高于其他三个品种,短枝比例最低的则是‘巴尔德温’,并显著低于其他三个品种,四个品种间的超长枝比例无显著差异。  相似文献   

3.
为筛为筛选出适宜广西来宾市露地种植的草莓优良品种,引进了‘妙香7号’、‘红颜’、‘红玉’、‘宁玉’4个草莓品种并开展种植试验和调查分析。结果表明,‘妙香7号’、‘红颜’、‘红玉’、‘宁玉’4个草莓品种在露地种植条件下平均单株产量在0.172~0.292 kg之间,平均单位面积产量在18060~30660 kg/hm2之间,果实可溶性固形物含量在8.35~10.92 %之间,果实可溶性糖含量在5.59~7.35 %之间。这些草莓品种产量较高,果实品质接近或优于本地主栽品种‘甜查理’,抗性中等或偏弱,在做好水肥管理和病虫害综合防治的情况下可选择作为‘甜查理’的重要补充。选出适宜广西来宾市露地种植的草莓优良品种,引进了‘妙香7号’、‘红颜’、‘红玉’、‘宁玉’4个草莓品种并开展种植试验和调查分析。结果表明,‘妙香7号’、‘红颜’、‘红玉’、‘宁玉’4个草莓品种在露地种植条件下平均单株产量在0.172~0.292 kg之间,平均单位面积产量在18060~30660 kg/hm2之间,果实可溶性固形物含量在8.35~10.92 %之间,果实可溶性糖含量在5.59~7.35 %之间。这些草莓品种产量较高,果实品质接近或优于本地主栽品种‘甜查理’,抗性中等或偏弱,在做好水肥管理和病虫害综合防治的情况下可选择作为‘甜查理’的重要补充。  相似文献   

4.
为揭示环渤海盐碱旱地不同饲用谷子（Setaria italica）的生产潜力,本研究通过2年的栽培试验,比较了23个饲用谷子的产量性状、农艺性状、营养成分指标,并采用标准差系数赋予权重法及粗饲料分级指数（Grading index,GI）对不同饲用谷子进行了综合评价分析。结果表明,不同饲用谷子品种间的各性状指标均存在显著差异。‘武安莠谷杂交-1-1’、‘HG001’、‘印90-39’、‘古川粟’、‘邯郸莠谷-11’、‘印度0907’干草产量能达到11 000 kg·hm-2及以上;‘承03-992’、‘饲草4号-4’、‘衡谷15号’、‘豫谷18号’、‘大同37号’、‘邯郸莠谷-11’、‘K3201’粗饲料分级指数在12.45以上,饲用品质优良;结合抗倒性综合评价,以‘邯郸莠谷-11’、‘衡谷15号’、‘印度0906’、‘太选2号’较好。因此,在环渤海盐碱旱地种植饲用谷子具有可行性,可优先推广‘邯郸莠谷-11’、‘衡谷15号’、‘印度0906’和‘太选2号’。  相似文献   

5.
近年广东发展葡萄取得了显著的经济效益。‘阳光玫瑰’葡萄以其优异的品质和丰产特性深受消费者和种植者喜爱,正在取代传统优势品种‘巨峰’。健康优质的苗木供应是保障‘阳光玫瑰’葡萄发展的重要前提。本研究采用硬枝离体嫁接方式将‘阳光玫瑰’嫁接在不同砧木上（‘5BB’、‘夏黑’、‘贝达’、‘3309C’及‘SO4’）,然后进行扦插。观察嫁接不同砧木的‘阳光玫瑰’葡萄萌芽进程、苗木长势、净光合速率和矿质营养状况,以期提高育苗效率,筛选适合广东的优质砧木。结果发现不同砧木的离体嫁接株萌芽率和成活率相差较大,其中,萌芽率以‘SO4’砧植株最高,其次为‘3309C’和‘5BB’,而‘贝达’最低;成活率则是‘3309C’最高,其次为‘SO4’和‘夏黑’,‘贝达’也是最低。总体上,离体硬枝嫁接方式成活率并不高,技术有待进一步完善。 在成活的植株中,‘5BB’和‘3309C’植株长势最强,其次为‘贝达’和‘SO4’,‘夏黑’最弱。‘阳光玫瑰’叶片光合速率在‘SO4’最高,而在‘5BB’上最低,但不同砧木间并无显著差异。‘5BB’、‘3309C’砧植株长势最强,其次为‘SO4’和‘贝达’,而‘夏黑’砧植株最弱;砧木对‘阳光玫瑰’叶片部分矿质营养有一定影响,例如‘5BB’砧木植株Zn、Fe和Mn最高,而B较低;‘3309C’和‘贝达’对B和Mg吸收强;‘夏黑’对P和K吸收强,但对Ca、Mg、Cu和Mn的吸收较弱。总体来看,‘3309C’和‘SO4’砧木与‘阳光玫瑰’离体硬枝嫁接较易成功,从长势看,‘5BB’ 和‘3309C’是‘阳光玫瑰’的优良砧木。基于砧木对营养吸收的偏好性,不同砧木的养分管理应有所差异。  相似文献   

6.
为选出适于海南北部地区生产的百香果品种,本研究自2018年起引进‘台农一号’、‘小黄金’、‘大黄金’、‘大黄果’、 ‘满天星’5个优质主栽百香果品种（系）,于琼北的澄迈县福山镇、海口市旧州镇和屯昌县屯城镇3个试验点开展试种筛选试验。通过对各品种（品系）植物学特征、农艺性状调查分析及果实品质指标测定进行适应性初步评价。结果表明：各品种百香果生长状况均较稳定,‘台农一号’、‘小黄金’的抗病性、耐热性及丰产性较‘满天星’、‘大黄果’更强,‘大黄金’居于中等水平;‘小黄金’、‘台农一号’、‘大黄金’果重较大,其可食率约在40%,显著高于‘满天星’与‘大黄果’;其果肉蔗糖、TSS含量均显著高于其他品种,而总酸含量则低于其他品种;果肉VC含量以‘台农一号’最高,‘大黄果’居中,其他品种无显著差异;‘满天星’、‘大黄果’固酸比分别为所有品种中最高（69.21%）和最低（51.23%）者且与其他品种差异显著。 综上所述,表现较好的‘台农一号’、‘小黄金’以及‘大黄金’3个品种,可作为琼北地区适宜生产发展的百香果品种（品系）。  相似文献   

7.
2013年起,陆续从保加利亚农业科学院引进4个树莓和黑莓品种在福建进行试种,观测各品种的植物学特征、物候期、果实经济性状和产量等指标。2015年起连续3年记录并总结‘柳林’、‘仙女’树莓和‘妮丝’、‘自由’黑莓的引种表现;同时从建园选址、苗木定植、田间管理、肥水管理、病虫害防治和采收等方面总结了栽培管理技术。实验结果表明：4个品种都能适应福建高山气候,丰产性较好;栽培方面应立架引缚、加强修剪、注意排水,建议采用避雨栽培;黑莓品种的单株产量高于树莓品种,且妮丝黑莓品种的果实外观、品质和丰产性最佳。  相似文献   

8.
对2个中晚熟黄肉桃品种‘锦绣’和‘黄金蜜桃3号’进行引种评价,结果表明2个品种的物候期、植物学特征、生长结果习性、果实主要经济性状、适应性与抗性均表现良好,且‘锦绣’适宜性及抗性相对更好,适合在安徽六安推广。总结试验地管理经验,形成轻简优质栽培技术,将为2个品种的生产栽培提供参考。  相似文献   

9.
为筛选出适合宁夏雨养区种植的优质高产青贮玉米（Zea mays）品种,于2019–2020年在宁夏隆德县许沟村采用随机区组试验对14个青贮玉米品种进行适应性评价,利用主成分分析法（PCA）对其农艺性状、产量及营养成分等指标进行综合评价。结果表明：‘种星618’的株高最高（313.2 cm）;‘SN211’的叶片数最多(15片·株-1);‘金刚50’的鲜草产量最高(99 822.9 kg·hm-2),显著高于其他品种（P <0.05）。淀粉含量大于30%的品种有3个,分别是‘银玉238’、‘SN211’、‘文玉3号’;茎秆糖锤度表现最优品种是‘银玉238’（9.14%）;粗蛋白含量表现最优品种是‘百绿2900’（11.69%）;‘金刚50’的中性洗涤纤维含量最低（39.72%）,相对饲喂价值最高（144.92）。PCA综合评价得分居前5位的品种分别为‘SN211’、‘宁单46’、‘种星618’、‘金刚50’、‘文玉3号’,其中‘金刚50’、‘宁单46’、‘文玉3号’产量和品质最佳。因此,‘金刚50’、‘宁单46’、‘文玉3号’适宜在宁夏雨...  相似文献   

10.
为解决当前宁南半干旱区草畜产业发展中优质、高产牧草紧缺的问题，本试验利用灰色关联度法对2018-2019年16个饲用高粱（Sorghum bicolor（L.）Moench）品种的农艺性状、产量及营养价值进行了评价。结果表明：鲜干草产量表现最优品种是‘大龙’，中性洗涤纤维、酸性洗涤纤维、相对饲用价值表现最优品种是‘美洲巨人’、‘甘露400’，粗蛋白含量表现最优品种是‘绿巨人’，水溶性碳水化合物表现最优品种是‘海狮’。综合分析结果显示，‘大龙’、‘海狮’、‘大力士’、‘F10’、‘海牛’5个品种表现最优，适合在宁南半干旱区进行推广种植。  相似文献   

11.
1-(2-Chloroethyl)3-cyclohexyl-1-nitrosourea (CCNU) is an alkylating agent in the nitrosourea subclass. A prospective evaluation of CCNU was done to determine the maximally tolerated dosage of CCNU in tumor-bearing cats. Response data were obtained when available. Twenty-five cats were treated with CCNU at a dosage of 50-60 mg/m3 body surface area. Complete hematologic data were available for 13 cats. Neutropenia was the acute dose-limiting toxicity. The median neutrophil count at the nadir was 1,000 cells/microL (mean, 2,433 cells/microL; range, 0-9,694 cells/microL). The time of neutrophil nadir was variable, occurring 7-28 days after treatment, and counts sometimes did not return to normal for up to 14 days after the nadir. Based on these findings, a 6-week dosing interval and weekly hematologic monitoring after the 1st treatment with CCNU are recommended. The nadir of the platelet count may occur 14-21 days after treatment. The median platelet count at the nadir was 43,500 cells/microL. No gastrointestinal, renal, or hepatic toxicities were observed after a single CCNU treatment, and additional studies to evaluate the potential for cumulative toxicity should be performed. Five cats with lymphoma and 1 cat with mast cell tumor had measurable responses to CCNU. Phase II studies to evaluate antitumor activity should be completed with a dosing regimen of 50-60 mg/m3 every 6 weeks.  相似文献   

12.
Human and equine athletes are reported to have a high prevalence of gastric disease, and anecdotal evidence suggests a similar phenomenon applies to racing sled dogs. To investigate the prevalence of gastric disease in racing sled dogs, we conducted 2 gastroscopy studies on dogs competing in the annual Iditarod Sled Dog Race. A pilot study of dogs that were either dropped from the 2000 Iditarod Sled Dog Race because of illness or that finished the race indicated that, approximately 5 days after competing, 10 of 28 dogs (35%) had endoscopic evidence of gastric ulceration, erosion, or hemorrhage. The next year, an endoscopic study of 73 dogs participating in the 2001 Iditarod race was performed in order to evaluate a larger population of dogs. Data from 70 of these dogs could be used; 34 (48.5%) had ulceration, erosion, gastric hemorrhage, or some combination of these findings. When this group of 70 dogs was compared retrospectively to a control group of 87 dogs presented to the Texas A&M University (TAMU) Veterinary Medical Teaching Hospital, the Iditarod sled dogs had a significantly higher prevalence (P = .049) of gastric lesions. These findings suggest that, similar to athletes of other species, elite canine athletes have an increased prevalence of gastric disease compared to the canine population at large.  相似文献   

13.
Continuous rate infusion (CRI) of furosemide in humans is considered superior to intermittent administration (IA). This study examined whether furosemide CRI, compared with IA, would increase diuretic efficacy with decreased fluid and electrolyte fluctuations and activation of the renin-angiotensin-aldosterone system (RAAS) in the horse. Five mares were used in a crossover-design study. During a 24-hour period, each horse received a total of 3 mg/kg furosemide by either CRI (0.12 mg/kg/h preceded by a loading dose of 0.12 mg/kg IV) or IA (1 mg/kg IV q8h). There was not a statistically significant difference in urine volume over 24 hours between methods; however, urine volume was significantly greater after CRI compared with IA during the first 8 hours ([median 25th percentile, 75th percentile]: 9.6 L [8.9, 14.4] for CRI versus 5.9 L [5.3, 6.0] for IA). CRI produced a more uniform urine flow, decreased fluctuations in plasma volume, and suppressed renal concentrating ability throughout the infusion period. Potassium, Ca, and Cl excretion was greater during CRI than IA (1,133 mmol [1.110, 1,229] versus 764 mmol [709, 904], 102.7 mmol [96.0, 117.2] versus 73.3 mmol [65.0, 73.5], and 1,776 mmol [1,657, 2.378] versus 1,596 mmol [1,457, 1,767], respectively). Elimination half-lives of furosemide were 1.35 and 0.47 hours for CRI and IA, respectively. The area under the excretion rate curve was 1,285.7 and 184.2 mL x mg/mL for CRI and IA, respectively. Furosemide CRI (0.12 mg/kg/h) for 8 hours, preceded by a loading dose (0.12 mg/kg), is recommended when profound diuresis is needed acutely in horses.  相似文献   

14.
The epidemiology of H. placei and of other gastrointestinal nematodes in yearling dairy cattle was examined on two farms in Kiambu District, central Kenya during each of 13 one-month periods from April 1993 to April 1994. On each farm, 32 newly weaned dairy calves were given a single dose of albendazole and then placed on experimental pastures. Twelve of the animals were designated for bi-monthly slaughter (n = 2) and analysis of worm population characteristics and 20 were designated for blood and faecal collection and for weighing. Two parasite-free tracer calves were grazed alongside the weaner calves each month throughout the study period and were also slaughtered for analysis of worm populations. Faecal egg counts, haematological and serum pepsinogen determinations, herbage larval counts, and animal live weight changes were recorded monthly. The study revealed that Haemonchus placei, Trichostrongylus axei, Cooperia spp. and Oesophagostomum radiatum were responsible for parasitic gastroenteritis and that H. placei was the predominant nematode present in the young cattle on both farms. Faecal egg counts from resident cattle and necropsy worm counts revealed that pasture larval levels were directly related to the amount of rainfall. The total worm burdens in the animals were highest during the rainy season (March–June and October–December) and lowest during the dry seasons (July–September and January–February). The very low recovery of immature larvae of H. placei from the tracer calves indicated that arrested development is not a feature of the life cycle of this parasite in central Kenya. The maintenance of the parasite population depended on continuous cycling of infection between the host and the pasture. The agroclimatic conditions of the study area were such that, in general, favourable weather conditions for the development and survival of the free-living stages of gastrointestinal nematodes existed all year round.  相似文献   

15.
The occurrence of ectoparasites in sheep flocks is frequently reported but seldom quantified. Sheep production used to be a predominantly family activity in the state of Sa~o Paulo (Brazil), but it began to become a commercial activity in the past decade. Thus, information about the ectoparasites existing in sheep flocks has become necessary. The present data were obtained by means of questionnaires sent to all sheep breeders belonging to the `Associaça~o Paulista de Criadores de Ovinos' (ASPACO; Sa~o Paulo State Association of Sheep Breeders). Response reliability was tested by means of random visits paid to 10.6% of the respondents. Most of the properties (89.5%) reported the presence of one or more ectoparasites. Screw-worm (Cochliomyia hominivorax) was the most frequent ectoparasite (72.5%), followed by bot fly larvae (Dermatobia hominis, 45.0%), ticks (Amblyomma cajennense) and Boophilus microplus, 31.3%) and finally lice (Damalinia ovis, 13.8%). Combined infestations also occurred, the most common one being screw-worm with bot fly larvae (36.0%) followed by bot fly larvae with ticks (13.9%), screw-worm with ticks (9.3%), bot fly larvae with lice (6.9%), and ticks with lice (5.0%). The most common triple combination was screw-worm, bot fly larvae and ticks (12.8%). Breeds raised for meat or wool were attacked by bot fly larvae and ticks more often than other breeds. Lice were only absent from animals of indigenous breeds. The relationships among these ectoparasites are discussed in terms of sheep breeds, flock size, seasonality and the ectoparasitic combinations on the host.  相似文献   

16.
Comparison of different tests to diagnose feline infectious peritonitis   总被引：1，自引：0，他引：1  
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17.
An experiment was conducted to study disappearance of C14 to C18 fatty acids, lag times and biohydrogenation (BH) rates of C18 fatty acids of ground soya bean and canola seeds in situ. Three ruminally fistulated Dallagh sheep were used to determine ruminal BH of unsaturated fatty acids (UFAs). Differences in the disappearance of fatty acids through the bags and lag times were observed between the oilseeds. We saw that the longer the incubation time of the oilseeds in the rumen, the lower the content of C18:2 and C18:3. Significantly higher lag times for both C18:2 and C18:3 were observed in ground canola compared to ground soya bean. BH rates of C18:2 and C18:3 fatty acids in soya bean were three times higher than those of canola. These results suggest that the fatty acid profile of fat source can affect the BH of UFAs by rumen micro‐organisms. So that UFAs of canola had higher ability to escape from ruminal BH. It seems that fatty acid profile of ruminant products is more affected by canola seed compared to soya bean seed.  相似文献   

18.
Serum biochemical values and the wet weight to dry weight ratios of tissues were determined in yaks in Shandan county of Gansu province. The liver, kidney, heart and muscle contents of seven elements in yaks were also analysed. Most serum biochemical values were similar to those of cattle, camels and sheep, but the calcium concentration was considerably above the normal range for other ruminants. The liver contained the highest concentrations of copper, manganese and cobalt and the kidney of selenium, iron and calcium.Abbreviations Alb albumin - ALT alanine aminotransferase - AST aspartate aminotransferase - BUN blood urea nitrogen - Chol cholesterol - Glob globulin - -GT -glutamyl transpeptidase - IP inorganic phosphorus - TP total protein  相似文献   

19.
正We are pleased to publish the second special issue on avian brood parasitism and to be responsible guest editors for the two special issues of Chinese Birds (Vol. 3, No. 4, 2012 and Vol. 4, No. 1, 2013), entitled "Avian Brood Parasitism - A Growing Research Area in Behavioral Ecology". The first issue was published in December 2012. The goal of the two special issues is to publish accumulated knowledge and some of the recent developments in  相似文献   

20.
Tropical Animal Health and Production -  相似文献   

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