共查询到20条相似文献，搜索用时 468 毫秒
1.
棉蚜是本区棉田主要害虫之一,其发生为害影响棉花生产发展,特别是对膜下滴灌棉田的产量及品质造成极大为害.自2002年推广膜下滴灌节水技术以来的6年里,棉蚜始终处于持续高发态势.本区病虫中心测报站自成立时,针对棉蚜开展了系统性调查以及大面积的普查工作.2002年调查项目转向膜下滴灌棉田.经几年调查,对膜下滴灌棉田棉蚜消长动态及特点有了全面了解.为减轻棉蚜对棉花的为害,使棉花生产可持续发展,生产部门在总结大量治理成果的同时,归纳出了适合本地的有效防治措施,并将其逐步推广转化,目前已取得了良好的经济效益和生态效益. 相似文献
2.
随着滴灌面积的增大,土壤次生盐渍化加剧,抑制了棉花生长发育,从而造成棉花产量下降.为了防止滴灌棉田次生盐渍化,减少土壤盐分对棉花生长发育的胁迫,经农一师农科所多年研究,利用磁化水滴灌棉田,可以降低土壤盐分提高棉花产量. 相似文献
3.
近年来,45团大力推广棉花膜下滴灌技术,由于栽培方式的改变,棉田生态小气候也发生了变化,也使棉叶螨的发生、消长规律发生了变化,表现为发生早、发生量大、对棉田危害加重的趋势。通过近几年的调查和实践,提出滴灌棉田棉叶螨的发生特点、危害加重原因与防治措施。1棉叶螨生活史 相似文献
4.
近年来,新疆南疆棉区大力推广膜下滴灌技术,由于栽培方式的改变,棉田生态小气候也发生了变化,使棉田“三虫”的消长规律发生了改变,为了使棉花害虫的综合防治更经济、安全、有效,根据多年的实践及调查,提出膜下滴灌条件下棉花“三虫”的防治对策。1膜下滴灌条件下“三虫”发生1.1棉蚜。膜下滴灌条件下棉蚜的发生较常规灌棉田发生程度偏重,扩散速度快,发生期长。从农一师三团系统调查可知(图1),前期不同灌溉条件下蚜量无明显差别,6月10日后由于灌溉的影响,不同类型的棉田蚜量呈现明显的变化,滴灌棉田蚜量上升较快,在高峰期单株3叶蚜量明显高… 相似文献
5.
近几年新疆棉田大面积采用滴灌技术,此技术推广已取得了明显成效,但是滴灌棉田病害又是棉花高产的主要障碍,为有效防治滴灌棉田病害的发生与危害,掌握滴灌棉田主要病害种类及其发生特点十分必要。1材料和方法2003-2005年在新疆农垦科学院实验场,以当地棉花主栽品种新陆早13号为试验调查材料。选择环境条件一致、具有一定代表性的滴灌棉田和常规沟灌棉田各两块进行试验调查。病害调查方法:每7天调查1次,每块田采用双对角线5点取样,每点20株,两类棉田各调查200株,分别记载病害的种类、发生时期及发病株率。2结果与分析2.1棉花黄萎病发生期。20… 相似文献
6.
2000年124团开始引进棉花膜下滴灌技术,2003年大面积推广,到2005年全团棉花膜下滴灌面积已达到2900hm2,绝大部分滴灌田增产增收效果十分明显,但也有少部分滴灌棉花产量一直不理想,没有很好掌握棉花滴灌高产栽培技术,尤其是水肥化控等主要技术,使滴灌田管理等同于常规田的管理。滴灌作为一项投资大,技术含量高的灌溉技术,必须和作物栽培技术配套才能发挥其效益。1标肥投放、配比与滴灌棉田需肥规律相适应1.1施足标肥。124团一些耕地已种植棉花30多年,土壤肥力逐渐下降,在没有厩肥、渣油投放的情况下,每公顷总标肥投放不能低于2100个,其中磷肥… 相似文献
7.
8.
芳草湖农场从2001年开始大面积推广棉花滴灌高密度种植技术,该技术节水增产效果显著,单产逐年提高,经济效益显著。但近年棉田有不同程度的早衰现象发生,且有日益加重之势,己成为制约棉花产量提高和品质改善的重大障碍。本文根据芳草湖农场多年的生产实践,对棉花滴灌高密度种植早衰的原因及防治措施等问题进行探索。 1 棉花高密度种植早衰的原因 相似文献
9.
新疆阿拉尔滴灌棉田栽培技术 总被引：1，自引：0，他引：1
目前，滴灌棉田的栽培技术日趋成熟，农一师棉花产量比过去有较大幅度的提高。农一师棉花面积12万公顷，单产目标子棉每公顷6573kg。一些团场部分棉田每公顷子棉突破8250kg。究其高产原因，除了土壤肥力等基础条件好，还掌握了一些田间管理中的关键点，对产量提高起到了重要作用。 相似文献
10.
11.
12.
《Journal of Cereal Science》2007,45(3):236-251
Sorghum is a good source of phenolic compounds with a variety of genetically dependent types and levels including phenolic acids, flavonoids, and condensed tannins. Most sorghums do not contain condensed tannins, but all contain phenolic acids. Pigmented sorghums contain unique anthocyanins that could be potential food colorants. Some sorghums have a prominent pigmented testa that contains condensed tannins composed of flavan-3-ols with variable length. Flavan-3-ols of up to 8–10 units have been separated and quantitatively analyzed. These tannin sorghums are excellent antioxidants, which slow hydrolysis in foods, produce naturally dark-colored products and increase the dietary fiber levels of food products. Sorghums have high concentration of 3-deoxyanthocyanins (i.e. luteolinidin and apigenidin) that give stable pigments at high pH. Pigmented and tannin sorghum varieties have high antioxidant levels that are comparable to fruits and vegetables. Finger millet has tannins in some varieties that contain a red testa. There are limited data on the phenolic compounds in millets; only phenolic acids and flavones have been identified. 相似文献
13.
Sorghum and millet phenols and antioxidants 总被引：5，自引：2，他引：5
Sorghum is a good source of phenolic compounds with a variety of genetically dependent types and levels including phenolic acids, flavonoids, and condensed tannins. Most sorghums do not contain condensed tannins, but all contain phenolic acids. Pigmented sorghums contain unique anthocyanins that could be potential food colorants. Some sorghums have a prominent pigmented testa that contains condensed tannins composed of flavan-3-ols with variable length. Flavan-3-ols of up to 8–10 units have been separated and quantitatively analyzed. These tannin sorghums are excellent antioxidants, which slow hydrolysis in foods, produce naturally dark-colored products and increase the dietary fiber levels of food products. Sorghums have high concentration of 3-deoxyanthocyanins (i.e. luteolinidin and apigenidin) that give stable pigments at high pH. Pigmented and tannin sorghum varieties have high antioxidant levels that are comparable to fruits and vegetables. Finger millet has tannins in some varieties that contain a red testa. There are limited data on the phenolic compounds in millets; only phenolic acids and flavones have been identified. 相似文献
14.
概述了海峡两岸农业交流与合作的现状,提出了应该共同呼吁尽快实现两岸“三通”,开放农业生物技术图书期刊资料交流以及开放生物学科方面网络的思路,以便为农业交流与合作的顺畅开展打好基础,并寄希望能够就糖蔗、果蔗以及甘蔗笋等方面的研究与开发到台湾学习取经,开展学术交流或与台湾同行共同开展研究,为我省甘蔗业的发展作出贡献。 相似文献
15.
种子加工、检验理论与技术现状及思考 总被引：3，自引：0，他引：3
种子加工及检验是种子向市场流通的关键，是商业化育种中赋予种子商品属性不可或缺的环节。种子加工、检验理论与技术的研究是完善种业产业链、实现规模化商业育种、夯实“育繁推一体化”种业科学的重要一环。中国的种业科学技术体系正在形成与完善之中，受制于行业发展水平，种子加工及检验理论与技术相对薄弱。本文回顾了种子加工及检验理论与技术研究发展历程，提出了完善中国种业科学发展的策略与建议。围绕种业发展的需要，在做好品种优质化繁育的基础上，分析种子加工及检验理论与技术的新方向和新需求，加强种业应用性研究，建立先进的种子质量检验体系，研制适合现代种业发展需求的种子加工设备，打造种子加工产业标准化生产体系，完善种业科学技术学科建设，促进种业产业持续健康发展。 相似文献
16.
17.
近年来，随着大豆播种面积的增长，受病虫危害日趋严重。特别是大豆根潜蝇（又名根明）与根腐病共同发生危害，严重影响大豆的生产。综合防治技术主要手段是三年以上轮作，适时播种及种衣剂拌种等措施。 相似文献
18.
Summary Between 1993 and 1998 205 different potato cultivars and 1220 accessions/genotypes of wild and cultivated potato species from
the IPK Genebank Gatersleben were evaluated. Parameters interesting for starch isolation and especially for the use of starch
were determined. Altogether, there was a higher variability in wild potato species than in cultivated potatoes for all characteristics
investigated: dry matter content, starch content, protein content, amylose content and mean particle diameter of starch granules. 相似文献
19.
In field experiments conducted over 2 years in Mediterranean conditions, five winter and five spring triticales were evaluated for forage and grain production in the same cropping season. The experiments had two treatments, namely harvesting for grain only, and dual-purpose forage and grain production. In the latter treatment, forage was cut when the first node was detectable (Zadoks' stage 31), without removing the apical meristems. Grain was harvested when ripe (Zadoks' stage 92) in both cut and uncut plots.
Environmental conditions affected grain production and protein content more than forage yield and quality. Winter triticales yielded about 43% more forage than spring types, but after forage removal the spring types yielded about 36% more grain than winter triticales.
Reductions in grain yield after clipping were more pronounced in winter (32%) than in spring (19%) types. Forage crude protein content was significantly higher in the spring types studied (24.6%) than in the winter types (23.5%), the opposite being true for fibre content (20.7 and 21.6% respectively). Grain crude protein content did not differ between grain and dual-purpose treatments, but was higher in the spring triticales (12.8%) than in the winter types (11.9%). There was more variability for the measured traits within the winter triticales studied than within the spring types. 相似文献
Environmental conditions affected grain production and protein content more than forage yield and quality. Winter triticales yielded about 43% more forage than spring types, but after forage removal the spring types yielded about 36% more grain than winter triticales.
Reductions in grain yield after clipping were more pronounced in winter (32%) than in spring (19%) types. Forage crude protein content was significantly higher in the spring types studied (24.6%) than in the winter types (23.5%), the opposite being true for fibre content (20.7 and 21.6% respectively). Grain crude protein content did not differ between grain and dual-purpose treatments, but was higher in the spring triticales (12.8%) than in the winter types (11.9%). There was more variability for the measured traits within the winter triticales studied than within the spring types. 相似文献
20.
种子加工及检验是种子向市场流通的关键,是商业化育种中赋予种子商品属性不可或缺的环节。种子加工、检验理论与技术的研究是完善种业产业链、实现规模化商业育种、夯实"育繁推一体化"种业科学的重要一环。中国的种业科学技术体系正在形成与完善之中,受制于行业发展水平,种子加工及检验理论与技术相对薄弱。本文回顾了种子加工及检验理论与技术研究发展历程,提出了完善中国种业科学发展的策略与建议。围绕种业发展的需要,在做好品种优质化繁育的基础上,分析种子加工及检验理论与技术的新方向和新需求,加强种业应用性研究,建立先进的种子质量检验体系,研制适合现代种业发展需求的种子加工设备,打造种子加工产业标准化生产体系,完善种业科学技术学科建设,促进种业产业持续健康发展。 相似文献