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为了改善栽培品种结构,探讨设施栽培产期调节技术,调节芒果鲜果供应市场时间,在南宁建设设施大棚,2016年~2019年对南逗迈4号芒开展设施栽培模式下产期调节试验。结果表明,在设施栽培模式下,南逗迈4号芒宜在4月上旬前修剪,7月-8月促花2-3次,调控在8月上旬至10月下旬开花坐果,12月下旬果实成熟。南逗迈4号芒适合作为设施栽培产期调节品种,12月成熟平均单果重366.4g,可溶性固形物含量19.5%,可食率73%。高接换种后第二年每667㎡产量470.4kg,第三年每667㎡产量959.4kg,第四年每667㎡产量1049.1kg,品种产期调节生产性状优,是具有发展前景的芒果设施栽培产期调节新品种。 相似文献
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以5年生的桂热芒71号为试材,采用设施避雨与露地栽培模式,比较分析了两种栽培技术对田间环境、果实生长发育、品质及产量的影响。结果表明：设施避雨栽培可降低田间湿度,平均降幅1.9%RH～2.4%RH。花期、幼果期和果实膨大至成熟期设施避雨与露天栽培田间湿度相差最大分别达到5.5%RH、5.4%RH、8.1%RH。桂热芒71号在设施避雨和露天栽培两种不同栽培模式下,果实迅速膨大期为第二次生理落果完成后的21～27天,之后为果实膨大缓慢期,因此,在果实膨大期可供应充足肥水、加强果园管理,促进果实增长。设施避雨栽培的总糖、Vc、TSS含量、株挂果数、产量分别比露地栽培提高了11.9%、34.4% 、5.2%、60.2%、85.09%,总酸含量比露地栽培降低了16%。在广西桂南等春季低温阴雨天气多的地区,可适当推广设施避雨栽培。 相似文献
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为探寻种植于年均温度偏低地区四季蜜芒反季节成花效果不理想,花期延后,产量低或果实品质差的解决方法和依据。本试验以5年生四季蜜芒为研究对象,开展了果园露地种植和防草布覆盖对四季蜜芒土壤温度和含水率,冠层温湿度,成花物候期和成花率,产量和品质影响的田间试验。结果表明：与露地种植相比,防草布覆盖提高四季蜜芒0-20cm土层土壤含水率和平均温度;冠层最高和平均温度分别提高0.2-5.9℃和0.4-1.5℃,降低平均和最低湿度;提早四季蜜芒开花7-10天,成花率提高26.0%;产量提高30.8%;果实可溶性固形物含量和糖酸比分别提高17.1%和33.9%,果实果皮细腻,无或极少斑点。覆盖防草布提高土壤温度和含水率及冠层温湿度,提早四季蜜芒反季节栽培成花时间和提高成花率,提升产量和品质,适合在年均温度偏低种植区推广应用。 相似文献
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矢尖蚧是我国芒果产区的一种有害昆虫。本研究通过田间和室内观测,记录矢尖蚧在芒果上的为害特点、各发育阶段虫态的主要特征、发生规律,并通过大田调查方法,了解设施大棚内9个芒果品种的矢尖蚧虫害发生程度。结果表明矢尖蚧可为害芒果的枝干、叶片和果实;雌虫经历2个若虫阶段和1个成虫阶段,雄虫经历2个若虫阶段、预蛹、蛹、成虫5个时期;金水仙芒和泰引1号芒的矢尖蚧为害程度最弱,桂热芒10号的矢尖蚧为害程度最高;下层树冠为矢尖蚧为害最严重的部位,中层树冠次之,上层最轻或不受为害;第 1 代若虫孵化盛期为施药防治最关键的时期。 相似文献
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为筛选出适合新疆南疆温室种植的果桑品种,提高果桑温室栽培的经济效益,对4个果桑品种进行温室栽培试验。结果表明：胖果成熟期最早,可溶性固形物含量偏低,但单株产量高。桂花蜜成熟期较早,可溶性固形物含量也较高,口感较好,单株产量高。红果3号成熟期稍晚,可溶性固形物含量较高,但单株产量较低。日本甜椹成熟期最晚,可溶性固形物含量最低,单株产量也较低。综合分析认为,胖果和桂花蜜成熟期早,可溶性固形物含量中等,丰产性好,适合新疆南疆温室栽培。 相似文献
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炭疽病和细菌性黑斑病是芒果生产上的重要病害,严重影响芒果的产量和质量。采用室内离体接种鉴定法,以抗病品种台农1号芒作为对照,对桂热芒3号果实不同发育时期（幼果期、膨大期、成熟期）及转绿期叶片进行炭疽病和角斑病的抗病性测定。结果表明：桂热芒3号四个发育时期炭疽病的病情指数依次为37.78、25.33、31.33、28.00,抗性评价结果均为抗病。细菌性黑斑病的病情指数依次为30.56、22.92、27.38、19.45,幼果期抗病评价结果为中抗,其余3个时期评价结果为抗病。差异显著性分析显示,桂热芒3号幼果期和膨大期的炭疽病病情指数达显著差异水平（p<0.05）,桂热3号芒与对照台农1号芒的转绿期叶片炭疽病病情指数达显著差异水平。桂热芒3号是一个对炭疽病为抗病、对细菌性黑斑病为中抗的晚熟芒果品种。 相似文献
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<正> 在乌克兰中部的天然饲料地和大田轮作中,多年生牧草的青饲料产量往往很低。原因之一采用低产的非划定栽培区品种的种子。1983——1984年在波格丹诺维奇国家品种试验区和斯维尔德洛夫省之间的化学实验工艺学实验室研究了无芒雀麦的收割时期对其单位面积产量和青饲料品质的影响,第一次收获无芒雀麦是在下列生育期:抽穗前、抽穗初,完全抽穗。所有的试验处理。草层 相似文献
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台湾早熟沙梨在广东英德望埠镇的引种初探 总被引：1，自引：0，他引：1
正广东英德望埠镇历来较少种植沙梨,仅房前屋后有零星栽培,且挂果少、产量低、品质差。1995年引种新世纪沙梨,但产量低。1999年春从广东省农科院果树研究所引进了代号4029的台湾早熟沙梨接穗,在5年生新世纪沙梨上高接换种5株,采用切接法嫁接,2001年试挂果,2002年进入正常挂果,株产30~40 kg,2005年春对全园1 600株新世纪沙梨进行高接换 相似文献
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Rassnick KM Gieger TL Williams LE Ruslander DM Northrup NC Kristal O Myers NC Moore AS 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2001,15(3):196-199
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
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Davis MS Willard MD Nelson SL Mandsager RE McKiernan BS Mansell JK Lehenbauer TW 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(3):311-314
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
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Furosemide continuous rate infusion in the horse: evaluation of enhanced efficacy and reduced side effects 总被引：1，自引：0，他引：1
Johansson AM Gardner SY Levine JF Papich MG LaFevers DH Fuquay LR Reagan VH Atkins CE 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2003,17(6):887-895
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
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Waruiru RM Thamsborg SM Nansen P Kyvsgaard NC Bogh HO Munyua WK Gathuma JM 《Tropical animal health and production》2001,33(3):173-187
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
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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
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Evaluation of biohydrogenation rate of canola vs. soya bean seeds as unsaturated fatty acids sources for ruminants in situ 
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下载免费PDF全文 S. Pashaei T. Ghoorchi A. Yamchi 《Journal of animal physiology and animal nutrition》2016,100(2):211-216
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
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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
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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
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Tropical Animal Health and Production - 相似文献