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EFFECT OF SULFENTRAZONE RATE AND APPLICATION METHOD ON WEED CONTROL AND STUNTING IN FLUE-CURED TOBACCO 磺胺酮用量及施药方式对烤烟除草和发育不良的影响
Pub Date : 2003-01-01 DOI: 10.3381/0082-4623-46.1.12
L. Fisher, W. Smith, J. W. Wilcut
Abstract Research was conducted at five locations in 1998 and three locations in 1999 to evaluate the effects of labeled and below-label rates of sulfentrazone on weed control and phytotoxicity in ...
摘要1998年和1999年分别在5个试验点和3个试验点研究了磺胺酮标记和低于标记剂量对水稻杂草控制和植物毒性的影响。
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引用次数: 7
EFFECTS OF INCORPORATION EQUIPMENT, APPLICATION METHOD, AND SOIL PLACEMENT OF SULFENTRAZONE ON INJURY TO FLUE-CURED TOBACCO 磺胺酮掺入设备、施用方式和土壤放置对烤烟危害的影响
Pub Date : 2003-01-01 DOI: 10.3381/0082-4623-46.1.1
L. Fisher, W. Smith, J. W. Wilcut
Abstract Research was conducted at one site in 1999 and three sites in 2000 to evaluate the influence of incorporation equipment and application method on flue-cured tobacco response to sulfentrazone. Sulfentrazone was applied at one (1X) and two (2X) times the recommended use rates with no incorporation, incorporation with a finishing disk or incorporation with a field cultivator prior to bedding. An application also was made to the soil surface prior to transplanting (PRE-T). At both the 1X and 2X rates of sulfentrazone, no differences in stunting were observed due to application method before bedding. At the 1X rate, the level of stunting was similar for no incorporation before bedding, incorporation with the field cultivator, and the PRE-T application. However, at the 2X rate, all incorporation treatments had greater stunting than the PRE-T application; stunting was never greater than 9% with PRE-T treatments. Stunting varied greatly across locations, making general conclusions on stunting based on me...
摘要1999年和2000年分别在1个试验点和3个试验点研究了掺入设备和施用方式对磺胺屈酮对烤烟反应的影响。以推荐用量的一倍(1X)和两倍(2X)施用磺胺酮,不掺入,在铺层前用整理盘掺入或用田间耕作机掺入。在移栽前还对土壤表面进行了一种应用(PRE-T)。在施药剂量为1X和2X的情况下,未观察到不同施药方式对发育迟缓的影响。在1X速率下,铺底前不掺入、田间耕作机掺入和PRE-T施用的发育不良程度相似。然而,在2X速率下,所有掺入处理均比PRE-T处理有更大的发育迟缓;PRE-T治疗的发育迟缓率从未超过9%。不同地区的发育迟缓差异很大,根据我的研究得出了关于发育迟缓的一般结论……
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引用次数: 2
PUFF-BY-PUFF DETERMINATION OF THE pH OF WATER-EXTRACTABLES FROM MAINSTREAM PARTICULATE PHASE AND WHOLE MAINSTREAM SMOKE OF REFERENCE AND COMMERCIAL CIGARETTES 参考卷烟和商品卷烟的主流颗粒相和整个主流烟中水萃取物pH值的逐次测定
Pub Date : 2003-01-01 DOI: 10.3381/0082-4623-46.1.8
C. Williard, E. Mcdaniel, R. M. Striegel, R. Walker, M. S. Sudholt
Abstract Two methods used for a puff-by-puff determination of the pH of water-extractables of cigarette smoke were compared. Particulate and whole smoke data for Kentucky Reference Cigarettes 1R3F, 1R4F, and 1R5F and for a commercial cigarette brand were collected. Mainstream particulate for each puff was collected separately on glass-fiber filter pads. The pads were extracted with deionized water (particulate method) or deionized water purged with exhaust from the smoking machine (whole smoke method) and the pH was measured. Particulate-method pH was inversely related to the amount of particulate collected, allowing for true comparisons between individual puffs from the same cigarette and between cigarette types. The whole smoke method lacked the sensitivity to distinguish between samples and is of little use as a comparative tool, probably because of the large contribution of carbon dioxide.
摘要:比较了两种逐烟法测定香烟烟气水提物pH值的方法。收集了肯塔基参考香烟1R3F、1R4F和1R5F以及商业香烟品牌的颗粒和全烟数据。每次抽吸的主流颗粒分别在玻璃纤维过滤垫上收集。用去离子水(颗粒法)或抽烟机排气后的去离子水(全烟法)提取烟垫,测定pH值。微粒法的pH值与收集到的微粒量呈负相关,从而可以在同一支香烟和不同类型的香烟之间进行真正的比较。全烟法缺乏区分样品的灵敏度,作为比较工具的用处不大,可能是因为二氧化碳的贡献很大。
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引用次数: 3
Boron Deficiency and Chilling Injury Interactions in Tobacco Transplants Grown in the Float System 浮载系统中烟草移栽缺硼与冻害的相互作用
Pub Date : 2003-01-01 DOI: 10.3381/0082-4623-46.1.36
L. Overstreet
Abstract Boron deficiency and chilling injury produce similar symptoms in young tobacco transplants. Mistaken identification of chilling injury as B deficiency has resulted in B toxicity when growe...
缺硼和冻害在烟草幼体移植中产生相似的症状。将冻害错误地认定为B缺乏导致了生长过程中的B中毒。
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引用次数: 4
EVALUATION OF LABOR REQUIREMENTS AND WORK RATES FOR CONVENTIONAL STRIPPING OF BURLEY TOBACCO1 传统白肋烟脱皮劳动要求和劳动率的评价
Pub Date : 2003-01-01 DOI: 10.3381/0082-4623-46.1.31
T. Bridges, L. Wells, M. Peters, W. Peterson
Abstract For the 1997 – 2004 crop years, labor records were kept for the burley tobacco stripping operation at the University of Kentucky Animal Research Center. Worker hours were recorded for the ...
摘要:肯塔基大学动物研究中心保存了1997 - 2004作物年白肋烟剥离作业的劳动记录。工人的工作时间被记录在…
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引用次数: 4
CHANGES IN BIOLOGICAL ACTIVITY DURING ARTIFICIAL FERMENTATION OF FLUE-CURED TOBACCO1 烤烟人工发酵过程中生物活性的变化
Pub Date : 2003-01-01 DOI: 10.3381/0082-4623-46.1.24
L. Qiu, M. Zhao, F. Li, W. Qi, W. Zhang, X. Yue, J. Cui
Abstract Bacteria accounted for the majority of microorganisms on both artificially fermented and non-fermented tobacco leaves. Fermentation decreased the number of species present as well as the total number of microorganisms present on leaves of flue-cured tobacco compared to control leaves. After eight days of fermentation, populations of bacteria, actinomycetes, and fungi were reduced by 52.8%, 9.4%, 79.8%, respectively, and total microorganism counts were reduced 55.7% relative to non-fermented controls. After 18 days, counts of bacteria, actinomycetes, fungi, were reduced 37.0%, 100%, 68.5%, and total microorganism counts were 42.1% below non-fermented leaves. In contrast, the activities of the enzymes peroxidase, polyphenol oxidase, proteinase, and α-amylase increased significantly during fermentation. On day eight, activities of these enzymes increased 197%, 31%, 232% and 164%, respectively, compared with non-fermented control leaves. At the end of the artificial fermentation, enzyme activities we...
人工发酵和非发酵烟叶上的微生物以细菌为主。与对照叶相比,发酵降低了烤烟叶片上存在的菌种数量和微生物总数。发酵8 d后,与未发酵对照相比,细菌、放线菌和真菌的数量分别减少了52.8%、9.4%和79.8%,微生物总数减少了55.7%。18 d后,细菌、放线菌和真菌的数量分别比未发酵叶片减少37.0%、100%和68.5%,总微生物数量比未发酵叶片减少42.1%。发酵过程中,过氧化物酶、多酚氧化酶、蛋白酶和α-淀粉酶活性显著升高。第8天,与未发酵对照叶相比,这些酶的活性分别提高了197%、31%、232%和164%。在人工发酵结束时,酶活性我们…
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引用次数: 4
ASSESSING HOLDING ABILITY IN FLUE-CURED TOBACCO CULTIVARS 烤烟品种持烟能力评价
Pub Date : 2003-01-01 DOI: 10.3381/0082-4623-46.1.28
D. Bowman
Abstract Leaves of flue-cured tobacco develop from immature to unripe to mature to ripe to overripe over a several week period beginning at the base of the plant. Leaf value improves through the ripe stage, then begins to decline as the leaves overripen. To harvest each leaf at its highest quality, plants are harvested several times during the season beginning with the lower leaves. Some leaves may be harvested after their peak quality. Growers prefer cultivars that retain their leaf value for as long as possible after optimum harvest time. The cultivar K326, which was released in the early 1980s, is well known for maintaining leaf quality and value over an extended time period, a trait now called “holding ability”. Each year since 1992 the Official Variety Testing Program at North Carolina State University has collected data on the holding ability of 10 or more cultivars at one or more locations. Value per hectare was chosen as the criterion for measuring this trait. Data from K 326 (the control cultivar...
烤烟的叶片从植株基部开始,在数周的时间内从未成熟到未成熟到成熟到成熟到过成熟。叶片价值在成熟期提高,然后随着叶片过熟而开始下降。为了以最高的质量收获每一片叶子,从较低的叶子开始,植物在一个季节里收获几次。有些叶子可在其最佳品质后采收。种植者更喜欢在最佳收获时间后尽可能长时间保持叶片价值的品种。K326品种于20世纪80年代初发布,以在较长时间内保持叶片质量和价值而闻名,这种特性现在被称为“持有能力”。自1992年以来,北卡罗莱纳州立大学的官方品种测试项目每年都会在一个或多个地点收集10个或更多品种的持有能力数据。选择每公顷价值作为衡量该性状的标准。对照品种k326的数据…
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引用次数: 5
A COMPARISON OF TWO METHODS FOR DETERMINING THE pH OF MAINSTREAM CIGARETTE SMOKE 两种测定主流香烟烟气pH值方法的比较
Pub Date : 2003-01-01 DOI: 10.3381/0082-4623-46.1.5
C. Williard, E. Mcdaniel, R. M. Striegel, R. Walker, M. S. Sudholt
Abstract Two methods used to determine the pH of mainstream cigarette smoke (MSCS) were compared to find the fastest and least complicated method. Both methods involved measuring the pH of only the water-soluble portion of the particulate fraction of MSCS. In method one, the pH of an aqueous extract of glass-fiber filter pads containing total particulate matter (TPM) was measured. In the second method, pH was measured directly from a glass fiber pad containing TPM that was moistened with 3 ml of degassed deionized water. Both methods were able to distinguish pH differences in the differently constructed reference cigarettes evaluated and were reproducible with relative standard deviations of less than 3%. Determination of smoke pH directly from a moistened glass fiber pad containing trapped TPM was found to be less complicated and quicker than determining pH of an aqueous extract due to the elimination of the extraction step.
摘要:比较了两种测定主流卷烟烟气pH值的方法,找出最快、最简单的方法。这两种方法都只测量MSCS颗粒部分的水溶性部分的pH值。方法一,测定含总颗粒物(TPM)的玻璃纤维滤垫水提物的pH值。在第二种方法中,直接从含有TPM的玻璃纤维垫上测量pH值,用3ml脱气去离子水湿润TPM。两种方法都能够区分不同结构的参考香烟的pH值差异,并且在相对标准偏差小于3%的情况下具有可重复性。由于消除了萃取步骤,直接从含有捕获TPM的潮湿玻璃纤维垫中测定烟雾pH值比测定水萃取物的pH值更简单和更快。
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引用次数: 2
EFFECT OF UNIFORMITY OF SEEDLING EMERGENCE ON THE PERCENTAGE OF USABLE TRANSPLANTS PRODUCED IN THE GREENHOUSE FLOAT SYSTEM 苗木出苗均匀性对温室浮法移栽成活率的影响
Pub Date : 2001-01-01 DOI: 10.3381/0082-4623-45.1.1
M. Hartley, W. Smith, J. F. Spears, L. Fisher, J. R. Schultheis
Abstract Experiments were conducted in 1999 and 2000 to investigate the effect of uniformity of seedling emergence on the percentage of usable tobacco transplants produced in a greenhouse float system. Uneven seedling emergence was facilitated by staggering seeding date in randomly selected cells within a 288-cell tray. Treatments included seeding all cells on day 1 (control) and seeding 75% of the cells on day 1 and 25% seeded on day 5, 7, or 12 (in 1999) and day 3 or 5 (in 2000); other staggered seeding combinations also were investigated. Seedling emergence was measured until maximum emergence was observed. Fifty days after initial seeding, total plant stand, number of usable transplants, stem length, fresh weight, and dry weight were determined. A sample of 10 seedlings, based upon the percentage of usable and non-usable transplants from an individual tray, was used to determine stem length, fresh weight, and dry weight measurements. In both years, delayed seeding resulted in slower and less uniform s...
摘要在1999年和2000年进行了盆栽悬浮法育苗均匀性对烟草移栽成活率的影响。在288个细胞托盘中随机选择的细胞,错开的播种日期促进了不均匀的幼苗出苗。处理包括在第1天播种所有细胞(对照组),在第1天播种75%的细胞,在第5、7或12天(1999年)和第3或5天(2000年)播种25%的细胞;其他交错播种组合也进行了研究。测定幼苗出苗率,直至观察到最大出苗率。初播50 d后,测定植株总林分、可用移栽数量、茎长、鲜重和干重。根据来自单个托盘的可用和不可用移植物的百分比,以10个幼苗为样本,用于确定茎长,鲜重和干重测量。在这两年,延迟播种导致播种速度变慢,籽粒不均匀。
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引用次数: 9
DIVERSITY OF ROOT BACTERIA FROM TOBACCO CROPPING SYSTEMS 烟草种植系统根细菌的多样性
Pub Date : 2001-01-01 DOI: 10.3381/0082-4623-45.1.15
J. H. Kim, H. Skipper, D. Gooden, K. Xiong
Abstract Little is known of the effects of various cropping systems on the rhizobacteria associated with tobacco. Our objective was to develop a database on the rhizobacteria present in continuous and rotational fields of tobacco by sampling in field plots over a 4-year period. Plots were established in a Norfolk soil near Florence, SC. For continuous culture plots, tobacco was planted in monoculture for four years. In rotational plots, tobacco, soybean, corn, and tobacco were planted during the 4-year test. Rhizobacteria were isolated from the roots of tobacco and rotation plants and identified by fatty acids composition using gas chromatography (GC/FAME). Arthrobacter and Bacillus were the primary genera recovered from non-rhizosphere soils. Four to seven genera of rhizobacteria accounted for the predominant organisms in both cropping systems; the total number of genera ranged from 17 to 22. Under monoculture tobacco, gram-negative rhizobacteria were dominant in July, whereas, gram-positive root bacteri...
人们对不同种植制度对烟草相关根瘤菌的影响知之甚少。我们的目标是通过4年的田间取样,建立一个烟草连续田和轮作田中根瘤菌的数据库。在南卡罗来纳州佛罗伦萨附近的诺福克土壤中建立了地块。对于连续栽培地块,烟草在单一栽培中种植四年。在4年试验期间,轮作地分别种植烟草、大豆、玉米和烟草。从烟草和轮作植物的根中分离得到根瘤菌,采用气相色谱法(GC/FAME)对其脂肪酸组成进行鉴定。节肢杆菌和芽孢杆菌是从非根际土壤中恢复的主要属。两种种植制度的优势菌属均为4 ~ 7属;总属数为17 ~ 22个。单作烟草7月革兰氏阴性根菌占主导地位,革兰氏阳性根菌占主导地位。
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引用次数: 4
期刊
中国烟草科学
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