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A Preliminary Investigation into the Feasibility of Gin Blending 杜松子酒调酒可行性初步探讨
IF 0.5 Q4 Materials Science Pub Date : 2019-01-01 DOI: 10.56454/amjd2168
M. V. D. VAN DER SLUIJS, C. Delhom, J. Wanjura, G. Holt
The biggest discounts to the grower are for grade, length and micronaire. Since round modules do not blend cotton from multiple parts of a field as conventional modules did, some round modules may fall below base grade. This study was initiated as a preliminary evaluation to determine the effect of gin blending on fiber, yarn and fabric processing performance and quality and the potential economic return to the grower. One lot of irrigated and dryland stripper-harvested seed cotton, with different pre-determined micronaire and length properties, were blended together in four different ratios (80/20%, 60/40%, 40/60% and 20/80%) at the gin and at the textile mill. The resulting two cottons and four blends were carded, ring spun, knitted, scoured, bleached and dyed. Based on the 2016 CCC loan schedule, gin blending can benefit the grower with the biggest economic benefit, about $5 per bale, obtained from the 80/20 and 60/40 blend ratios when using seed cotton with these particular qualities from this one-year study. Processing performance and yarn and fabric quality of the gin blended product were not different from that of the unblended cotton and the mill blended fiber, indicating no serious consequences associated with gin blending, cotton with this micronaire and length range, to the spinner.
对种植者来说,最大的折扣是等级、长度和马克隆。由于圆形模块不像传统模块那样混合来自田地多个部分的棉花,一些圆形模块可能会低于基本等级。这项研究是为了初步评估混纺对纤维、纱线和织物加工性能和质量的影响,以及对生产者的潜在经济回报。在轧棉厂和纺织厂以四种不同的比例(80/20%、60/40%、40/60%和20/80%)混合了一批具有不同马克隆值和长度特性的灌溉和旱地剥棉种子棉。得到的两种棉和四种混纺经过梳理、环纺、针织、洗涤、漂白和染色。根据2016年CCC贷款计划,当使用本年度研究中具有这些特殊品质的种子棉时,从80/20和60/40的混合比例中获得的杜松子酒混合可以使种植者获得最大的经济效益,约为每包5美元。轧机混纺产品的加工性能、纱线和织物质量与未混纺棉和纺机混纺纤维没有什么不同,这表明轧机混纺对纺纱者没有严重的影响,具有这种马克隆和长度范围的棉花。
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引用次数: 1
Accuracy, Precision, and Harvesting Efficiency of a Cotton Plot Picker Installed with an Automatic Weighing System in a Cotton Breeding Program 棉花育种中安装自动称重系统的棉花采摘机的准确性、精密度和收获效率
IF 0.5 Q4 Materials Science Pub Date : 2019-01-01 DOI: 10.56454/qxuw6885
Jinfa Zhang, S. Hughs
Many cotton breeding programs in the U.S. have installed an automatic weighing system in a cotton plot picker to increase operating efficiency in recent years. However, no experimental data are available to document the reliability of such a system. The objective of this study was to evaluate the accuracy, precision, and harvesting efficiency of a two-row cotton plot picker installed with an automatic weighing system with two scales based on results from replicated field tests from 2013 to 2016. Three tests each year, each containing 32 genotypes were arranged in a randomized complete block design in two-row plots by 10 m in length. The 2013 to 2015 results showed a highly significant positive correlation in seedcotton weights between the two rows of the same plot for each genotype harvested and weighed by the two scales in the picker, indicating that the two scales are consistent and reliable. In three tests in 2016, one row of each two-row plot was harvested by the picker, and seedcotton weight was compared with another row harvested by hand. A highly significant positive correlation was detected between the two harvesting methods that had similar coefficients of variation (16.14% for hand harvest vs. 16.90% for mechanical harvest). The two-row plot picker harvested a total of 368 single-row plots (10-m long) in six hours daily, whereas hand harvest by one person averaged two plots in four hours. An average of 417 kg ha-1 was lost due to the mechanical harvest.
近年来,美国许多棉花育种项目都在棉花采摘机上安装了自动称重系统,以提高操作效率。然而,没有可用的实验数据来证明这种系统的可靠性。本研究基于2013 - 2016年重复田间试验结果,对安装双秤自动称重系统的两排棉花采摘机的准确性、精密度和收获效率进行了评价。每年进行3次试验,每次试验包含32个基因型,采用完全随机区组设计,以10 m的长度分成两行。2013 ~ 2015年的结果表明,同一地块两行各基因型棉籽重与采摘机中两种尺度的称重呈极显著正相关,表明两种尺度是一致可靠的。在2016年的三次试验中,每个两行地块的一行采用采摘机收获,并将棉籽重与另一行手工收获的棉籽重进行比较。具有相似变异系数的两种采收方法之间存在高度显著的正相关(手工采收16.14%,机械采收16.90%)。两排采摘机每天在6小时内收获368块单排地块(10米长),而一个人的手工采摘平均在4小时内收获两块地块。由于机械收获,平均每公顷损失417公斤。
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引用次数: 0
Cotton Response to Simulated Hail Damage and Stand Loss in Central Texas 德克萨斯州中部棉花对模拟冰雹损害和林分损失的响应
IF 0.5 Q4 Materials Science Pub Date : 2019-01-01 DOI: 10.56454/oxuc6037
Joshua McGinty, G. Morgan, D. Mott
Hail damage poses a significant threat to many cotton-producing regions in the U.S. Stand reductions, or loss of leaves, stem, and fruit can occur from these events, and growers must make critical management decisions on whether to keep or replant a damaged crop. To address these questions, field trials were conducted near College Station, TX in 2012 to 2014 to investigate the impact of stand loss and node removal on yield under both dryland and irrigated conditions. To simulate stand losses, stands of three different varieties seeded at 111,197 seed ha-1 were thinned by up to 84%. The critical plant population where yield reductions occurred was inconsistent under irrigated conditions, depending upon the year. Consistent yield losses were experienced only when 84% stand reduction occurred under dryland conditions. To investigate the impact of node removal, field trials were conducted where the upper portions of cotton plants were clipped at 2-, 4-, 8-, 12-, 16-, and 20-node growth stages. Significant yield losses were experienced only when clipping occurred early in the season, between the 2- and 8-node growth stages.
冰雹灾害对美国的许多棉花产区构成了重大威胁,这些灾害可能导致林分减少,或叶子、茎和果实的损失,种植者必须做出关键的管理决策,决定是保留还是重新种植受损的作物。为了解决这些问题,我们于2012年至2014年在德克萨斯州的College Station附近进行了田间试验,以调查旱地和灌溉条件下林分损失和节点移除对产量的影响。为了模拟林分损失,在111,197粒/粒的播种条件下,3个不同品种的林分被削薄了84%。发生减产的关键植物种群在灌溉条件下不一致,取决于年份。只有在旱地条件下林分减少84%时才会出现持续的产量损失。为了研究去除棉花节的影响,在棉花植株生长的2、4、8、12、16和20节阶段进行了田间试验。只有在2节和8节生育阶段发生修剪时,产量才会有显著损失。
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引用次数: 3
Comparison of Growth, Yield, and Fiber Quality of the Obsolete SA30 Yellow Leaf with Four Sets of Modern Yellow and Green Leaf Near Isogenic Cotton (Gossypium hirsutum L.) Lines SA30废黄叶与4组现代黄绿叶近等基因棉花生长、产量和纤维品质的比较行
IF 0.5 Q4 Materials Science Pub Date : 2019-01-01 DOI: 10.56454/byuv7908
R. Turley, S. Stetina, N. Bellaloui, W. Molin
The Virescent Yellow leaf cotton line Stoneville Accession 30 (SA30, PI 528447) was crossed with four modern parental lines (DP5690, DES119, SG747 and MD51ne) to develop four sets of near isogenic lines (NILs) segregating for green and yellow leaves. Comparisons of these lines were made in the field in a two-year replicated study between the obsolete SA30 line and four modern NIL sets. Yield measurements, including hand (bolls/plant) and machine harvested (kg/plot) samples, of the four modern NIL sets compared to SA30 resulted in a twofold difference except for DP5690 yellow leaf (192%) and MD51ne yellow (167%) in the kg/plot ratios. Other yield measurements (seed cotton weight and 100 boll seed weight) reflected the "Mebane" cotton background of the SA30 line with larger bolls, whereas lint yields reflected the higher lint percentages of the modern NILs. Growth parameters including plant height and number of nodes were measured at predetermined intervals and height-to-node ratios were determined with the green leaf lines growing faster than the yellow leaf lines. The yellow leaf NILs and the SA30 line grew at the same rate. Cotton fiber quality was measured with both AFIS and HVI and both similarities and differences are reported in the paper. Even though the NILs used in this study were created to evaluate various yield measurements along with plant height and height-to-node ratios, this study also demonstrated that these lines can be used to search for the genes involved in increased partitioning to the reproductive structures.
将绿黄叶棉品系Stoneville Accession 30 (SA30, PI 528447)与4个现代亲本(DP5690, DES119, SG747和MD51ne)杂交,得到4组绿黄叶分离的近等基因系。在一项为期两年的重复研究中,这些线在过时的SA30线和四个现代NIL集之间进行了比较。产量测量,包括手工(铃/株)和机器收获(公斤/地)样本,与SA30相比,四个现代NIL组的产量测量结果显示,除了DP5690黄叶(192%)和MD51ne黄叶(167%)的公斤/地比率外,差异为两倍。其他产量测量(籽棉重和百铃重)反映了结铃较大的SA30系的“Mebane”棉花背景,而皮棉产量反映了现代NILs较高的皮棉百分比。每隔一段时间测量株高和节数等生长参数,并测定高节比,结果表明绿色叶系的生长速度快于黄色叶系。黄叶NILs与SA30系生长速率相同。用AFIS和HVI对棉纤维质量进行了测定,并比较了两者的异同。尽管本研究中使用的NILs是为了评估各种产量测量以及植株高度和高节比,但本研究还表明,这些品系可以用来寻找与生殖结构分配增加有关的基因。
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引用次数: 1
Functional Characterization of Seed and Seedling Vigor in Cotton 棉花种子和幼苗活力的功能特征
IF 0.5 Q4 Materials Science Pub Date : 2019-01-01 DOI: 10.56454/fxqj8103
F. Bourland
Attaining seed and seedling vigor in cotton is a goal of both researchers and producers. By separating and defining components of seed and seedling vigor, progress can be achieved. Seed vigor should be distinguished from seed viability and defined in terms of low degree of seed deterioration. Varying levels of resistance to seed deterioration have been achieved using different approaches. Three components are proposed for defining seedling vigor: well-developed seedling roots, rapid true-leaf differentiation, and low incidence of seedling disease. Approaches for making improvement in each of these components are discussed. Attaining seed and seedling vigor, and subsequently vigorous stands of cotton, requires an integrated approach and improvement in each component.
获得棉花的种子和幼苗活力是研究者和生产者共同追求的目标。通过分离和确定种子和幼苗活力的组成部分,可以取得进展。种子活力应与种子活力区分开来,并以种子劣化程度低来定义。采用不同的方法取得了不同程度的抗种子劣化能力。幼苗活力由三个组成部分组成:发育良好的幼苗根、快速的真叶分化和低发病率的幼苗病。讨论了改进这些组件的方法。获得种子和幼苗的活力,以及随后的旺盛的棉花林,需要综合的方法和每个组成部分的改进。
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引用次数: 6
Export Demand Elasticity Estimation for U.S. Cotton 美国棉花出口需求弹性估计
IF 0.5 Q4 Materials Science Pub Date : 2019-01-01 DOI: 10.56454/ldun4964
Bing-Yue Liu, D. Hudson
U.S. cotton exports have been characterized by large fluctuations in the last two decades. However, the latest available elasticity estimates of U.S. cotton exports are from 1982. New and more precise estimates of export demand elasticities for U.S. cotton are necessary to forecast future U.S. cotton exports and accurately analyze potential political policy and market changes. This study provides updated estimates of the elasticity of foreign demand for U.S. cotton in selected major cotton importing countries using an Armington framework for the years 1978 to 2017. Additionally, this study examines the evolution of the export demand elasticities over time in a dynamic framework of time-varying parameters (TVP) based on the Kalman filter methodology. Our results indicate that short-run price elasticities of foreign demand for U.S. cotton are price inelastic for major cotton importing countries, except for Pakistan. Countries with lower export demand elasticities are associated with relatively large U.S. cotton market shares for these countries. The import demand elasticity for U.S. cotton in recent years is becoming less elastic, implying that cotton import demand in major importing countries has become less price sensitive than it was historically, and the U.S. has competitive advantages in these major cotton importing countries over other suppliers.
在过去的二十年里,美国棉花出口的波动很大。然而,美国棉花出口的最新弹性估计是1982年的数据。对美国棉花出口需求弹性进行新的和更精确的估计,对于预测未来美国棉花出口和准确分析潜在的政治政策和市场变化是必要的。本研究使用阿明顿框架,对1978年至2017年选定的主要棉花进口国对美国棉花的外国需求弹性进行了最新估计。此外,本研究基于卡尔曼滤波方法,在时变参数(TVP)的动态框架中考察了出口需求弹性随时间的演变。我们的研究结果表明,除了巴基斯坦外,美国棉花的短期价格弹性对主要棉花进口国来说是非弹性的。出口需求弹性较低的国家与这些国家相对较大的美国棉花市场份额有关。近年来美国棉花的进口需求弹性逐渐变弱,这意味着主要进口国的棉花进口需求对价格的敏感性已经低于历史水平,美国在这些主要棉花进口国相对于其他供应国具有竞争优势。
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引用次数: 0
Effect of Foliar Applied Nitrogen to Cotton with Artificial Terminal and Node Removal 人工拔节法对棉花叶面施氮效果的影响
IF 0.5 Q4 Materials Science Pub Date : 2019-01-01 DOI: 10.56454/qtmq4569
M. Plumblee, D. Dodds, L. Krutz, Angus L. Catchot Jr., J. T. Irby, J. Jenkins
Management decisions are needed for producers who experience hail or wildlife damage to cotton when replanting is not an option. This research was conducted to determine if applications of foliar nitrogen (N) fertilizer had an effect on cotton growth, lint yield, lint turnout, or fiber quality to cotton that had eight nodes of growth, including the apical meristem, removed at pinhead square or first bloom. The effects of foliar N (no foliar N, foliar N applied at the time of damage, one week after damage, two weeks after damage, at the time of damage + one week after damage, at the time of damage + two weeks after damage, one week after + two weeks after damage, and at the time of damage + one week after + two weeks after damage) were evaluated on Phytogen 499 WRF planted in Mississippi in 2016 and 2017.
当棉花遭受冰雹或野生动物破坏而无法重新种植时,生产者需要做出管理决策。本研究旨在确定叶面氮肥的施用是否对棉花生长、皮棉产量、皮棉出纱率或棉花品质有影响,这些棉花在针尖方或首次开花时除去了8个生长节点,包括顶端分生组织。对2016年和2017年在密西西比州种植的Phytogen 499 WRF进行了叶面N(不施叶面N、受损时施叶面N、受损后1周、受损后2周、受损时+受损后1周、受损后1周+受损后2周、受损后1周+受损后2周、受损时+受损后1周+受损后2周)的效果评价。
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引用次数: 0
How Current Cotton Ginning Practices Affect Fiber Length Uniformity Index 当前轧棉工艺对纤维长度均匀性指数的影响
IF 0.5 Q4 Materials Science Pub Date : 2019-01-01 DOI: 10.56454/bees5030
C. B. Armijo, D. Whitelock, P. Funk, V. Martin
There is a need to develop cotton ginning methods that better preserve length uniformity, a fiber characteristic that is critical with newer, more efficient air-jet spinning technology. This report summarizes results of harvesting and ginning studies within the past fifteen years that included High Volume Instrument (HVI) fiber length uniformity index (uniformity). The studies concluded that cultivar was an important determining factor and some production practices, such as early defoliation and stripper harvesting, could also reduce uniformity. Uniformity was not adversely affected by seed cotton cleaning machinery (cylinder cleaners and stick machines). Saw ginning reduced uniformity more than did roller ginning, from 0.8 to 2.0%. Uniformity was negatively affected by the saw-type lint cleaner, from 0.4 to 1.1% per stage. Moisture restoration before lint cleaning partially mitigated (0.5%) lint cleaning’s decrease in uniformity. Studies reviewed in this report suggest that most of the decrease in uniformity occurs at the saw-type lint cleaner feed bar. Although uniformity was not affected by lint cleaner grid bars, faster lint cleaner saw cylinder speeds did reduce uniformity. Roller gin-type lint cleaners reduced uniformity 0.2 to 0.8%, which was less than the reduction caused by saw-type lint cleaners.
有必要开发能够更好地保持长度均匀性的轧棉方法,这种纤维特性对于更新、更高效的喷气纺纱技术至关重要。本文综述了近15年来的采收和整种研究成果,包括高容量仪器(High Volume Instrument, HVI)测定的纤维长度均匀度指数(uniformity)。研究结果表明,品种是影响品种均匀性的重要因素,而一些生产实践,如过早落叶和剥叶采收也会降低均匀性。棉籽棉清洗机械(滚筒清洗机和棒状清洗机)对均匀性没有不利影响。锯轧比辊轧更能降低均匀度,从0.8降至2.0%。锯型棉绒清洗剂对均匀性有负面影响,每级0.4 - 1.1%。棉绒清洗前的水分恢复部分减轻了(0.5%)棉绒清洗均匀性的下降。在本报告中回顾的研究表明,大部分的均匀性下降发生在锯型棉绒清洁进料棒。虽然均匀性不受棉清洁器网格条的影响,但更快的棉清洁器锯缸速度确实降低了均匀性。辊轧机型棉料清洗剂降低均匀性0.2 ~ 0.8%,比锯式棉料清洗剂降低幅度小。
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引用次数: 9
Effects of Harvesting Direction and Row Spacing on the Cotton Stripper Performance in Irrigated Cotton Fields 收获方向和行距对水田脱棉棉性能的影响
IF 0.5 Q4 Materials Science Pub Date : 2019-01-01 DOI: 10.56454/bnwi2396
M. Roozbeh, M. Zahiri
Cotton is picked manually in Fars Province, Iran. It is not only a slow, labor-intensive operation, but extremely tedious, hard work. Due to scarcity of labor at harvesting time, mechanization of cotton harvesting is of vital importance. Therefore, a field study was conducted to evaluate the interactive effects of harvesting directions (in the rows, cross, and oblique, or skew) and row spacing (24-, 36-, and 70-cm) on cotton stripper performance. Results showed that different harvesting directions and row spacing had a significant effect on seed cotton loss. Maximum seed cotton loss was observed in the row direction treatment and minimum loss occurred in the skew treatment. The findings revealed that maximum loss was obtained from row spacing of 70 cm. Overall, these results demonstrated that cotton grown in 36-cm rows and harvested in a skewed or oblique direction had a greater impact on the reduction of seed cotton losses and produced seed cotton yield higher than the 70-cm rows harvested in the rows direction.
在伊朗法尔斯省,棉花是手工采摘的。这不仅是一项缓慢、劳动密集型的操作,而且是一项极其繁琐、艰苦的工作。由于采收时劳动力稀缺,棉花收获机械化至关重要。因此,本研究通过田间试验,评估了采棉方向(行、横、斜或斜)和行距(24、36和70 cm)对棉花脱棉性能的交互影响。结果表明,不同收获方向和行距对籽棉损失有显著影响。行向处理籽棉损失最大,斜向处理籽棉损失最小。结果表明,行距为70 cm时损失最大。综上所述,36 cm行距和斜向收获对减少籽棉损失的影响更大,籽棉产量高于70 cm行距和斜向收获。
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引用次数: 1
Cotton Development and Yield Response to Irrigation, Planting Date, and Cultivar in North Carolina 北卡罗莱纳州棉花发育及产量对灌溉、播种日期和品种的响应
IF 0.5 Q4 Materials Science Pub Date : 2019-01-01 DOI: 10.56454/utsy2848
T. Spivey, K. Edmisten, R. Wells, Deovina N. Jordan, J. Heitman, G. Wilkerson
In 2012, only 2.7% of North Carolina’s cotton (Gossypium hirsutum L.) was irrigated compared to the national average of 39%. The small size and nonuniform shape of most North Carolina fields are not conducive for a center pivot system. However, benefits to yield due to irrigation in North Carolina have been reported, specifically in years receiving below average or sporadic rainfall. The objective of this research was to investigate the impact of subsurface drip irrigation (SDI) on growth and yield of early- and late-maturing cotton cultivars at varying planting dates in eastern North Carolina. In 2014, the site received more than 750 mm of rainfall and no differences were observed for any parameters between irrigated and non-irrigated plots. Total rainfall in 2015 and 2016 was lower with several extended periods without rain events. There was a greater plant height increase and dry weight accumulation throughout the growing season in response to SDI. Cotton yields were increased by SDI in 2015 and 2016. Cultivar only influenced lint yield in 2016 with the earlier-maturing ‘PHY 333 WRF’ having greater lint yield than ‘PHY 499 WRF’. Planting date did not influence yield under irrigated conditions, and the timing of rainfall played a role similar to previous reports in North Carolina. Irrigation applied via SDI will increase cotton plant stature, fruit retention, and yield in response to deficit moisture conditions, independent of planting date or cultivar.
2012年,北卡罗来纳州只有2.7%的棉花(棉)得到灌溉,而全国平均水平为39%。北卡罗莱纳大多数油田的面积小,形状不均匀,不利于中心支点系统。然而,据报道,北卡罗莱纳州灌溉对产量的好处,特别是在降雨量低于平均水平或零星降雨的年份。本研究旨在探讨地下滴灌(SDI)对北卡罗莱纳州东部不同种植期早熟和晚熟棉花品种生长和产量的影响。2014年,该地区的降雨量超过750毫米,灌溉和非灌溉地块之间的任何参数都没有差异。2015年和2016年的总降雨量较低,有几次长时间没有降雨。在整个生长季,SDI对植株高度的增加和干重的积累都有较大的影响。2015年和2016年,SDI增加了棉花产量。品种仅影响2016年的皮棉产量,早熟的“PHY 333 WRF”的皮棉产量高于“PHY 499 WRF”。在灌溉条件下,播种日期不影响产量,降雨时间的作用与之前北卡罗来纳州的报告相似。通过SDI灌溉将增加棉花植株的高度、果实保持率和产量,以响应水分不足的条件,与种植日期或品种无关。
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引用次数: 1
期刊
Journal of cotton science
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