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谷优527系福建省农科院稻麦研究所用优质、抗病、配合力强的不育系谷丰A与蜀恢527配组而成的优质晚籼三系杂交水稻新组合.2002年参加福建省晚籼优质稻组区试,平均单产6.71t/hm2,比对照两优2163增产8.24%,13个试点有12个增产,增产点数达到92.31%.2003年续试,平均单产7.25t/hm2,比对照两优2163增产9.25%,14个试点都比对照增产,增产点数达到100%.2a区试,平均单产均居该熟组所有参试组合之首,增产都达到极显著水平.破格参加2003年福建省水稻新品种(组合)生产试验,8个试点平均单产7.12t/hm2,比对照汕优63增产11.92%.参加2a福建省区试抗稻瘟病鉴定,综合评价为中抗稻瘟病(MR).于2004年1月通过福建省农作物品种审定委员会审定,并获得福建省第二届优质稻评选三等奖.2004年闽侯县尧沙引进试种,表现生育期理想、产量高、稳产性好、米质优、抗性强等优点,是值得推广的优质高产高效的杂交水稻新组合,现将其主要特征特性及高产栽培技术总结如下. 相似文献
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杂交水稻新组合Ⅱ优1273是福建省三明市农科所用Ⅱ-32A与明恢1273配组而成的杂交水稻新组合.2004年1月通过福建省农作物品种审定委员会审定.该组合具有高产、抗病、优质等优点,适合福建省作中稻栽培,2003年在尤溪县西城镇麻阳村作再生稻超高产栽培6.7hm2,头季稻平均产量达12.32 t/hm2.经多年的试种、示范和推广,深受农民欢迎.明溪县种子公司从2003年起进行Ⅱ优1273的大面积制种并对其制种技术进行研究,2004年大面积制种单产稳定在3.75 t/hm2,部分农户达4.5 t/hm2.现将在明溪县单产达4.5 t/hm2的制种经验总结如下. 相似文献
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秦优10号系陕西省咸阳市农科所采用细胞质雄性不育三系法选育而成的甘蓝型油菜三系杂交种.具有产量高、品质优良、含油量高、抗性强等突出特点.经试验单产分别为2654.97～3058.5kg/hm2.较对照秦优7号增产6.07%～6.95%,较皖油14号增产13.47%.产油量1120.95～1137.9kg/hm2,较秦优7号和皖油14号分别增产8.48%和17.26%.经在江苏示范最高单产5722.5kg/hm2,在安徽省示范最高单产3804kg/hm2,品质优良,芥酸含量0.1%～0.27%,硫甙含量27.97～29.06μmol/g,含油量42.52%～42.8%,2004年和2006年分别通过陕西省和长江下游的国家农作物品种审定. 相似文献
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东海县是一个典型的农业大县 ,耕地总面积1 0 .8万 hm2 ,人口 1 0 7万 ,是全国首批商品粮基地县之一。常年种植水稻 5.3万 hm2以上 ,总产 40多万t。我县 1 992年开始试验示范肥床旱育秧 ,是全省最早的几个县之一 ,1 998年推广面积已达 4.3万 hm2 ,占水稻总面积的 79.9% ;1 996年开始大面积示范塑盘旱育抛秧 ,1 998年应用面积达 1万 hm2 ,平均单产62 1 kg/667m2 ,比全县平均单产 592 kg/667m2 增产4.9%。其中育秧公司统一供秧面积 333.3hm2 ,平均单产 656.3 kg/667m2 ,比全县平均单产 592 kg/667m2 增产 64.3 kg/667m2 ,比人工栽插节本 35.50… 相似文献
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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
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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
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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
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《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
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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
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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
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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