湖南棉花纤维品质的现状及改良措施

阐述了湖南棉花纤维品质现状 ,分析了限制湖南棉花纤维品质提高的原因 ,并根据长江中下游棉区定位为 5 0～ 60支纱产区的区划方针 ,提出了增强湖南棉花市场竞争力的几点建议。     

湘农棉1号的选育及其高产栽培技术

湘农棉1号是利用高产优质棉花品种P115株系材料为母本,抗枯萎病耐黄萎病棉花品种P48为父本杂交配组育成的杂交棉花新组合.该品种产量高、抗性好,2009年2月通过湖南省农作物品种审定委员会审定,适合长江中下游流域棉区种植.     

中棉所29在沿江棉区示范结果

宿松县位于长江中下游北岸，常年植棉面积１．７万ｈｍ２，皮棉产量１２７５ｋｇ·ｈｍ－２左右，是长江流域高产棉区之一。近年来，由于棉铃虫为害猖獗，皮棉单产一直徘徊不前，严重地挫伤了农民的植棉积极性。为寻求综合治理棉铃虫新途径，１９９７年我县引进了中国棉花...     

泗抗3号的特性与栽培技术

泗抗3号系江苏泗阳棉花原种场选育的集高产、稳产、抗病、优质于一体的杂交棉新组合，该组合2000年开始进行多点试验及小面积示范，2001年开始参加省棉花品种区域试验，2003年以来已在江西、江苏、安徽等省大面积推广种植。2005年被定为江西省棉花品种区域试验的对照品种。目前已成为长江中下游棉区主要推广品种之一。     

北疆早熟棉机械采收的发展趋势与品种选择

1 北疆棉花生产的发展 近几年全国棉花面积逐年下滑,根据中国棉花协会数据:2007-2013年,全国棉花种植面积从5.926×106公顷,降至4.548×106公顷.据业内人士分析:我国棉花种植面积在5.33×106公顷以上才是处于安全范围.长江中下游和黄淮海两大棉区由于保证粮食安全的需要,棉花生产规模呈现锐减态势,稳定棉花面积难度很大.     

棉花花铃期生产技术指导意见

当前正值棉花的花铃期,是产量形成和需水需肥的关键期。针对当前长江中下游棉区持续高温、华北东北部和黄土高原局部棉田出现渍涝的情况,提出如下生产管理技术指导意见。1及时灌溉,保铃增产花铃期的叶面积大,蒸腾量大,是需水的高峰     

皖沿江棉区杂交棉的种植现状与发展前景

通过对安徽省长江两岸沿江棉区棉花生产的调查研究,分析了安徽沿江棉区杂交棉的种植现状,探索了杂交棉发展受阻的内因和外因,展望了安徽沿江棉区杂交棉生产发展的前景,同时对安徽沿江棉区棉花生产如何向机械化生产转移开展了讨论,为安徽沿江棉区的棉花生产走出困境寻找一条有效途径。     

长江中下游棉区机械植棉的制约因素及对策分析

<正>长江中下游棉区已有700多年的植棉史,植棉水平、规模和原棉品质随历史的发展而逐步提升,特别是新中国成立后的50年,提升更快,极大地促进了国民经济的发展和本区民计民生的提高。这是一个有优势的宜棉区域,是我国未来棉花结构调整后的主要产区,是目前和未来都要重点保护和发展的植棉区。虽说目前转型期的态势给棉花产业和棉农带来了尴尬和迷茫,但也预示着新的产业模     

湘杂棉1号推广应用的配套技术

１９９５年１月,由湖南省棉花科学研究所选育的陆地棉新杂交种湘杂棉１号经省农作物品种审定委员会审定命名,成为我省和长江中下游棉区第一个通过省级审定的杂交棉组合。同年４月和８月,省科委和国家科委先后将其列入湖南省“九五”重点推广计划项目和《国家级科技成果...     

抗虫棉R93—4在枝江试种初报

抗虫棉Ｒ９３—４在枝江试种初报①陈国兵湖北省枝江县棉花公司４４３２００枝江地处长江中游，棉铃虫在我县棉区猖獗为害，致使治虫投资逐年加大，用工逐渐增多，严重的影响了当地棉花生产发展。近几年，关于抗虫棉在北方棉区试种及推广的报道较多，而南方试种报道较少。...     

豫北优质大豆产业发展策略

针对豫北地区的大豆生产现状，从气候、土壤、品种、生态因素及市场需求等方面提出了优质大豆的发展策略与途径。     

Comparisons of methods of scheduling irrigations of potatoes

Irrigation of Netted Gem potatoes was scheduled during three growing seasons by three methods: (a) when plants displayed first visual symptoms of moisture stress, (b) when indicated by a soil moisture budget involving estimated evapotranspiration, and (c) on the basis of tensiometer readings of soil moisture suction. When the tensiometer method of scheduling was used, the mean yields of tubers were 55.0 and 25.8 cwt/acre (6160 and 2890 kg/ha) higher than those obtained with the other two scheduling methods. Methods did not affect the specific gravity of potatoes. Method (a) scheduled irrigations least frequently. Scheduling by the budget method was not always adequate because it was based on the assumption that the crop extracted water from a constant 4 ft (1.2 m) profile from planting to full vegetative growth. In one year the budget method scheduled the first irrigation earlier than necessary and delayed the second irrigation during a critical period of crop growth. From full vegetative cover to harvest the irrigation schedules were alike for both the budget and tensiometer methods.     

湖南沅陵4种绿茶品质成分分析

以长沙县高桥相同嫩度茶鲜叶原料采用卷曲形毛尖茶加工工艺制绿茶为对照,分别对沅陵县齐眉翠峰、凤娇碣滩茶、干发茶和军大坪茶4种绿茶的主要生化成分与感官品质进行初步分析。结果表明,沅陵4种绿茶的茶多酚总量28.76%~30.34%,游离氨基酸总量2.35%~3.22%,咖啡碱含量3.00%~3.63%,水浸出物含量37.26%~40.07%,可溶性糖总量5.46%~5.65%,可溶性蛋白含量1.50%~1.74%,类黄酮化合物总量1.16%~1.79%,叶绿素总量1.36%~2.01%,儿茶素总量13.53%~16.20%。与对照相比,4种绿茶的茶多酚、可溶性糖和儿茶素总量均高于对照,除齐眉翠峰外其余3种茶样水浸出物和叶绿素总量均高于对照,除干发茶外其余3种茶样类黄酮化合物总量均高于对照。     

吉林省平安农业科学院大豆所大豆研究工作报告

1　吉林省平安农业科学院大豆研究工作简介吉林省平安农业科学院大豆研究所 ,设在吉林省长春市西安大路种子大厦内。现有科技人员 6人 ,其中研究员 2人 ,农艺师 2人 ,技术员 2人 ,定向培养研究生 2人。大豆研究所的主要任务是选育稳产、高产、优质及抗病虫大豆新品种 ;同时密切     

Analysis of nutritional components of eight famine foods of the Republic of Niger

In the western Sahel, indigenous plants become important staples when cereal harvests are inadequate to support populations inhabiting that region of Africa. The purpose of this study was to assess the nutrient content of several of these edible wild plants. The leaves of the following seven plant foods were analyzed: Ziziphus mauritiana, Cerathotheca sesamoides, Moringa oleifera, Leptadenia hastata, Hibiscus sabdarifa, Amaranthus viridi, and Adansonia digitata. The fatty acid, vitamin E, carotenoid, selected mineral and amino acid contents of these plant foods were determined. These same analyses were performed on the fruit of the Adansonia digitata. In quantitative and qualitative terms, Amaranthus viridis was found to be an excellent source of protein. Its amino acid composition compared favorably to that of a World Health Organization (WHO) protein standard. It also contained considerable amounts of the two fatty acids that are essential in humans (linoleic and -linolenic) and a number of minerals including iron, magnesium, calcium and zinc. The leaves of Hibiscus sabdarifa contained an appreciable quantity of protein the composition of which was comparable to the WHO standard. The mineral content of the leaves of this plant was also exceptionally high; noteworthy was its high zinc content. H. sabdarifa also contained significant quantities of the two essential fatty acids. Ziziphus mauritiana was an excellent source of the essential fatty acid linoleic acid and several of the metals including iron, calcium, magnesium and zinc. Its content of other essential nutrients, however, was rather low. In general, Adansonia digitata leaves were nutritionally superior to the fruit of the tree; however, the fruit did contain useful quantities of potassium, phosphorus, zinc and -linolenic acid. The Leptadenia hastata leaves were an especially good source of lutein and -carotene. These data should be useful to the people who inhabit the western Sahel in helping them devise healthy diets during times when cereal staples are in short supply.     

防治水稻潜叶蝇的药剂筛选

通过对防治水稻潜叶蝇不同药剂、不同用量的田间对比试验,结果表明,32 g/kg的35%丁硫克百威拌种预防潜叶蝇效果最好,药效可达55 d以上,适宜在生产上推广应用。     

狗牙根诱变后代抗寒性评价

通过电解质外渗法和匍匐茎恢复试验对‘阳江’狗牙根及其12个通过形态鉴定选出的坪用价值高且花序密度低的诱变后代进行抗寒性鉴定。电解质外渗法结果表明:诱变后代间的抗寒性具有较大差异,其叶片半致死温度(LT₅₀)的变异范围为-7.6～-0.2℃(最低值与最大值相差7.4℃);参试材料抗寒性由强到弱依次为M18>M4>M26>M28> M22>阳江>M29>M31>M10>M37>M16>M1>M25,其中,有5个诱变后代抗寒性优于亲本,分别是M18、M4、M26、M28、M22。匍匐茎恢复实验结果表明:诱变后代M1、M22、M26、M31、M25在0℃和-5℃低温胁迫后的恢复生长率都高于亲本,恢复能力均优于亲本;M10、M37、M28在-5℃低温胁迫下,恢复生长能力低于亲本,抗寒性相对较弱,M16和M4在0℃和-5℃低温胁迫下,恢复生长率都低于亲本,抗寒性明显弱于亲本。综合2种方法鉴定结果显示:诱变后代M1、M25的恢复能力较强;M4、M28的叶片抗寒性较好,青绿期较长;M22、M18、M26的叶片抗寒性和匍匐茎恢复能力均较强;M29,M31的叶片抗寒性和匍匐茎恢复能力与亲本相似;M10、M16、M37的叶片抗寒性和匍匐茎恢复能力均较弱,整体抗寒性较弱。     

12份白花泡桐材料亲缘关系的ISSR分析

以‘福桐’、‘绿桐’2个无性系与10个不同种源的白花泡桐个体为研究对象，采用ISSR分子标记对12份白花泡桐材料的亲缘关系进行研究，并利用DPSv3.01进行聚类分析。结果表明：10条引物共扩增出66条条带，其中有37条多态带，多态性比例为56.1%。根据ISSR聚类分析结果，在遗传距离为0.35时，12份白花泡桐材料可分为5类，第1类为‘福桐’无性系与河南、河北种源个体；第2类为‘绿桐’无性系与湖南、湖北、江苏种源个体；第3类为浙江、广东种源个体；第4类为江西、福建种源个体；第5类为广西种源个体。此结果     

龙眼种质资源果实经济性状的稳定性评价

为了探讨龙眼(Dimocarpus longan Lour.)种质果实性状的稳定性,连续3a对40份不同基因型龙眼种质果实数量性状的年际间表现进行测定比较。结果表明,在气候条件差异较大的不同年份,单果重、果皮重、果肉重、种子重、果皮厚、可食率、可溶性固形含量等果实性状均表现丰富的多样性,并存在年际间的显著或极显著水平差异,气候条件对果实数量性状有显著影响;不同性状的稳定性有差异,其中可食率的稳定性最高,其次是可溶性固形物含量。通过聚类分析,可将40份龙眼种质按果实性状稳定性分成7类。