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1.
生态农业由于充分发挥了多种生物种群的作用,实行了多级利用的良性循环,不仅提高了经济效益,增强了自我发展的能力,同时改善了生态环境,促进了新能源开发。 相似文献
2.
辽宁省农垦局承担了农垦农产品质量追溯系统建设项目,经过3 a的运行,制定了《辽宁省农垦局农产品质量追溯工作制度》,建立了项目管理组织和项目管理制度,完善了省级监管平台,规范了追溯系统,产品实现了可追溯,培育了品牌,增强了市场竞争力。 相似文献
3.
文章分四个时期阐述了建国40年来我国甜菜科研工作进展状况,介绍了取得的主要成就;①明确了甜菜自然栽培区和集中产区;②搜集整理了甜菜品种资源,选育出若干新品种;③建立了三级良种繁育制度,实现了良种化;④总结丰产经验,推广了先进栽培技术;⑤摸清了主要病虫害发生及流行规律,提出了防治措施;③开展了基础理论及生物技术的研究,并取得了可喜成绩。 相似文献
4.
生态农业由于充分发挥了多种生物种群的作用,实行了多级利用的良性循环,不仅提高了经济效益,增强了自我发展的能力,同时改善了生态环境,促进了新能源开发。 相似文献
5.
本文简要论述了松阳茶产业的现状,着重探讨了松阳茶业发展的道路,其主要经验是宣传启动了松阳茶业,科技振兴了松阳茶业,市场造就了松阳茶业,政府扶持了松阳茶业;展望未来,茶文化将引领松阳茶业,深度开发将提升松阳茶业。松阳茶业实现了经济效益、社会效益、生态效益三赢,致富了松阳百姓。 相似文献
6.
在大田试验条件下,观察了实地氮肥管理对水稻产量和稻米品质的影响。与农民习惯施肥法相比,实地氮肥管理在水稻产量持平或略有提高的情况下明显降低了施氮量。实地氮肥管理提高了稻米的加工品质,降低了垩白米率、垩白面积和垩白度,提高了稻米的透明度,改善了外观品质;实地氮肥管理还明显降低了直链淀粉含量,提高了胶稠度,降低了糊化温度和蛋白质含量。此外,实地氮肥管理明显提高了米粉的最高黏度、崩解值,降低了消减值,改善了稻米的食味品质。农户示范也取得了类似的结果。对实地氮肥管理改善稻米品质的原因进行了讨论。 相似文献
7.
会议于2月28日至3月2日在泉州市召开,到会代表69人,审议了三届工作报告;传达了农业部三个重要会议的精神;进行了学术和信息交流;参观了改革开放的石狮市;总结了学会工作经验;完成了换届选举;发展了11个团体会员,成立了5个分会、3个委员会和2个小组;研究了1989年的工作重点;收效颇大. 相似文献
8.
利用农业防治、生态调控、生物防治、物理防治和化学防治等技术体系,3年来在湘阴建立了一个新的稻米质量安全控制技术示范基地,对比非示范区有效地降低了总氮肥用量、减少了稻田农药施用剂量、保护了稻田自然天敌、压低了病虫害发生基数、丰富了稻田生物多样性、保证了稻谷产量、提高了稻米品质. 相似文献
9.
江西省四月分在宜春地区农科所召开了全省麻类新品种选育和栽培协作会议,与会同志畅谈了麻类生产、科研的大好形势,交流了经验,商讨了麻类育种目标和主攻方向,统一了试验方法和记载项目,落实研究了协作任务和项目,并就加快全省麻类科研步伐问题,提出了意见。 相似文献
10.
渠江薄片·罗村茶产地释疑薛德炳(四川万源市茶果站万源·636350)发掘、恢复历史名茶,研创具有特色的新名茶,促进了茶业科技进步,丰富了茶叶品类,优化了茶叶品级,繁荣了茶叶市场,适应了茶叶消费变化,提高了茶业经济效益,标志着茶业生产进入了新的发展时期... 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.
介绍了我国麻类标准的现状。通过分析,指出了存在的问题,主要表现在标准体系不完善、标准更新不及时,协调性差及贯彻执行不力等。提出了我国麻类标准应采取的对策。 相似文献
13.
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-m 2 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
14.
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
15.
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
16.
对影响我国热区主要蔬菜产前、产中、产后的质量安全相关因素与现状进行调研,获取基础数据与有关信息。对比分析国内不同生产区质量安全存在的差异与差距,研究我国热区蔬菜从生产至市场各个环节的质量安全评价方法,提出建立我国热区蔬菜质量安全评价体系方案。 相似文献
17.
经过多年实践,探索总结出抗病虫品种、频振式太阳能杀虫灯、糖盆诱蛾、黄蓝板诱虫、生物多样性控虫等绿色防控技术,形成了切合库尔勒实际的棉花病虫全程绿色防控技术模式。介绍了上述技术措施及其在当地棉田的推广应用效果。 相似文献
18.
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.
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
20.
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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