共查询到20条相似文献，搜索用时 78 毫秒
1.
通过对纳米苎麻针织物的远红外发射率、红外照射温升、透气性、湿热传递性、保温性、冷暖感、悬垂性等指标进行测试，并对各指标及其相互间关系进行分析，为苎麻类功能性针织品的开发提供科学依据。 相似文献
2.
3.
4.
苎麻属野生植物农艺性状、纤维物理性能及其相关性研究 总被引：1，自引：0，他引：1
对苎麻属野生植物农艺性状、纤维物理性能及其二者相关性进行研究,结果表明:苎麻属植物各农艺性状值表现均不及栽培苎麻,尤以茎粗、鲜皮厚度、鲜皮重和原麻重表现较甚,分别较对照减幅为42.37％～77.97％、20.00 ％～70.00％、54.92％ ～98.77％和67.90％～98.83％;野生植物中密球苎麻、水苎麻和疏毛水苎麻的纤维细度较高,分别较栽培苎麻高出27.89％、23.81％和6.73％,表明野生苎麻中存在高细度优良基因;纤维细度除与原麻长度呈较小正相关性外,与其它农艺性状指标达不同程度负相关;说明苎麻属野生种质在提高栽培苎麻产量上应用价值不大,但在提供选育优良纤维基因,改善纤维品质上具有重要应用价值. 相似文献
5.
6.
苎麻主要品质性状研究进展 总被引：2，自引：0，他引：2
苎麻纤维的细度、强力、断裂强度、均匀度、结晶度是衡量苎麻纤维品质优劣的几项主要指标。本文就苎麻主要品质性状的研究方法、进展及遗传改良进行概述，并对目前研究中存在的问题进行了讨论。 相似文献
7.
8.
本文首次用抗旱指数（ Ｒ Ｉ） 等指标对苎麻基因型抗旱性进行了鉴定。结果表明：圆叶青、沅江黄壳早和沅江稀节巴为抗旱性较强的基因型, 抗旱性较弱的基因型包括资兴绿麻和新宁箭杆麻。苎麻抗旱性早期鉴定的途径和指标的研究结果表明： Ｒ Ｗ Ｃ（ 相对含水量） 、 Ｐ Ｏ Ｄ（ 过氧化物酶） 、 Ｐｒｏｉｎｅ（ 脯氨酸） 与抗旱指数呈正相关, 而 Ｒ Ｐ Ｐ（ 细胞膜透性） 、 Ｍ Ｄ Ａ（ 丙二醛） 则与抗旱指数呈负相关。苎麻扦插（４５ 天） 苗在渗透胁迫４ 小时测定相关生理生化指标,其中 Ｒ Ｗ Ｃ 、 Ｐｒｏｌｉｎｅ 和 Ｐ Ｏ Ｄ 活性与抗旱指数呈正相关,而 Ｒ Ｐ Ｐ 和 Ｍ Ｄ Ａ 则与抗旱指数呈负相关, 采用模糊隶属法用上述五种生理生化指标对１３ 个基因型抗旱性进行了早期鉴定,此法简便有效,准确性高。 相似文献
9.
10.
苎麻／涤Sirofil织物性能及品质研究 总被引：4，自引：0，他引：4
将Sirofil纺纱方法应用于苎麻/涤纶混纺,开发了苎麻/涤纶Sirofil织物。基于FAST、KES客观评价系统以及织物的基本物理指标的测试结果,对设计的织物的性能和风格进行了讨论和评价。 相似文献
11.
Textile fibers were obtained from secondary polyethylene terephtalate (PET) and its mixtures with primary PET at initial orientation of 18000–33000 %, rate of additional orientation drawing 3.5–6.5 times and temperature of thermal fixation 363–413 K. The fibers’ tensile strength was found to decrease and elongation at break to increase with the decrease of their linear density under the conditions of fibers formation. For the fibers based on polymer mixtures, the presence of oxidized fragments in the secondary PET limited the compatibility of the two polymers which resulted in deteriorated tensile properties. The linear density (4–16 dtex), tensile strength (30–50 cN/tex) and elongation at break (20–60 %) of the PET fibers obtained were close to these for the industrially produced polymer fibers. The values of the average diameter of the fibers formed and oriented under laboratory conditions allows classifying them between the fine and the coarse textile fibers which makes them suitable for the textile industry. 相似文献
12.
Gas-exchange characteristics of potato (Solanum tuberosum L.) canopies were determined with crop enclosures under condition of optimal water supply, during soil water depletion, and during recovery from drought-stress. The plants were grown under a rainshelter in large containers with 2-m2 surface area. Control plants received water throughout the growth period. In Expt. 1, transient drought was imposed by interrupting water supply completely for 22 days. During the 33-day period of drought treatment in Expt. 2, the stressed plants received half the amount of water that was given to the control plants (irrigations 2–3 times per week).
During soil water depletion, stomatal conductance of the canopy was reduced earlier and more than photosynthesis. This resulted in a lower internal carbon dioxide concentration in the leaves of stressed plants and a higher ratio between photosynthesis and stomatal conductance. The value of that ratio increased as soil water potential dropped.
Water-use efficiency ( ) increased during drought stress. The cultivar Bintje showed a larger ratio between photosynthesis and stomatal conductance of the canopy and a higher than cv. Saturna, both for optimal water supply and during drought stress.
Photosynthesis and conductance of the canopy started to recover immediately upon rewatering, even when relative values had declined to 20–30% during the preceding stress period. After release from stress, the leaves in the top layer of the canopy had a higher stomatal conductance in treated plants than in control plants. 相似文献
13.
14.
2017—2018年,在同安镇粮食产能区示范推广水稻病虫害绿色防控与统防统治融合技术模式,取得了显著成效。融合技术示范区比常规区减少用药2~3次,用药量减少37.6%,防治成本降低400元/hm^2;水稻产量增加12.8%,收益增加2 835元/hm^2。 相似文献
15.
《Journal of Crop Improvement》2013,27(1):313-324
Summary Arbuscular mycorrhizae were inoculated into phosphorus-deficient soil fertilized with either organic or chemical fertilizer with cucumber (Cucumis sativus L.) as the first crop and lettuce (Lactu-ca sativa L.) as the second crop but without additional fertilization and AM inoculation. AM increased dry matter and fruit yield of cucumber significantly in the unfertilized, organic-fertilized and P-deficient plants compared with the fully chemical-fertilized plants. AM inoculation increased the available phosphorus in plant and soil by around 30% for all treatments except for those chemically-fertilized. The rate of AM infection did not differ significantly among the fertilization treatments, but the infection intensity was higher in unfertilized, organic-fertilized and phosphorus-deficient treatments than chemical-fertilized treatment. The residual effects of AM-inoculated to cucumber were evident for lettuce in all pre-treatments that were unfertilized and un-inoculated for the second cropping. Without P-fertilization, neither crop could grow optimally even when the soil was inoculated with AM, suggesting that AM could not serve as a substitute for phosphorus fertilizer. However, the other beneficial effects of AM on crop growth and yield could not be fulfilled with phosphorus fertilizer. 相似文献
16.
17.
18.
生物质能作物——甘薯开发利用现状及趋势 总被引：13，自引：0，他引：13
甘薯是世界上重要的粮食、饲料、工业原料及新型能源用块根作物，在我国乃至世界再生能源开发中起到重大作用，其分布地域广，适应性强，沙荒地、岗坡地均可种植。生物产量高，而且种植栽培容易。甘薯含淀粉15％～30％，晒干率20％～35％，世界各国以薯干或淀粉为原料生产乙醇有着悠久的历史。随着全球能源的日趋紧张，乙醇作为一种可再生的环保燃料．将快速步入全球成品油市场，在替代汽油供应方面起到越来越大的作用。各国正在推行或制定燃料乙醇计划，并着眼于生物燃料乙醇应用方案，认为甘薯可能是摆脱将来粮食和能源危机的“最后一张王牌”。 相似文献
19.
施镁量和施镁方法对烤烟生长发育和烟叶产量的影响 总被引：4，自引：0，他引：4
采用盆栽试验，研究施镁量和施镁方法对烤烟生长发育和烟叶产量的影响，结果表明：适量施用镁肥，可以促进烟草的生长发育、改善其农艺学性状，影响烟株对其它营养元素的吸收与积累，提高烟叶产量，并能使烟叶N，P，K，Ca等营养元素含量更趋协调。随着施镁量的增加，烟叶中镁含量提高10．7％～71．4％，烤烟单株吸镁量、叶片叶绿素含量、干物质产量分别提高17．6％～115．4％，1．9％～23．ooA和6．3％～25．7％，而对烟叶含钾量没有明显影响。在镁比较缺乏的土壤上，镁肥作基肥施比叶面喷施的效果好，基肥施镁结合叶面喷镁的效果最佳；叶面喷镁，肥料用量少、成本低、见效快，是一种有效的镁肥施用方法；提高镁肥用量，施镁的效果更加显著。 相似文献
20.
为明确春季调控措施对冬小麦生长发育和籽粒产量的影响,以冬小麦品种石新828为材料进行田间试验,4个处理分别为:起身期追全部氮肥(除基肥外,下同)并叶面喷多效唑(N1);起身期追2/3氮肥并喷多效唑+拔节期追1/3氮肥(N2);起身期追1/3氮肥+拔节期追2/3氮肥(N3);拔节期追全部氮肥(N4)。生育期间测定群体和个体生育特性,成熟期调查产量性状。结果表明,N1和N2处理小麦拔节期的总茎数、叶面积指数(LAI)和干物质积累量均显著高于N4和N3处理。孕穗期N4和N3处理小麦的总茎数、LAI和干物质积累量显著高于N1和N2处理。开花到成熟期各处理的总茎数、LAI和干物质积累量差异均不显著。孕穗期前,不同处理的株高差异不显著,孕穗期后,N4处理的株高最高,且显著高于N1处理。各处理基部节间直径和中上部节间长的差异不显著,N4处理基部第一节间长度显著大于其他处理。随追氮时期前移或前期施氮量增多,不孕小穗数减少,结实小穗和穗粒数增加,N1比N4处理不孕小穗数显著减少,结实小穗和穗粒数显著增多。N1处理小麦成熟期的千粒重最高,且显著高于N4处理。N1处理的籽粒产量最高,且显著高于N3和N4处理。起身期追氮配合多效唑调控,可以获得比拔节期追氮更高的穗粒数和千粒重,从而获得更高的产量。 相似文献