耐盐抗旱优质高产棉花新品种‘衡棉1670’的选育研究     

戴茂华  刘丽英  刘雪梅  李辰晖  吴振良 《农学学报》2021,11(12):40-43

抗逆优质丰产棉花新品种的培育及应用是当前棉花生产节水提质增效的关键。‘衡棉1670’是河北省农林科学院旱作农业研究所以中早熟陆地棉品种资源材料‘衡棉210’为母本,以‘衡棉4号’为父本杂交,后代多年南繁北育,经旱棚盐池鉴定选择,在枯黄萎病混生重病地、不防治棉铃虫的高压胁迫下,经过多年连续定向选择育成。其突出表现为抗枯黄萎病、丰产优质、耐盐抗旱节水,适宜在河北省及黄河流域同类生态春播棉区推广种植,2019年8月通过河北省农作物品种审定委员会审定（审定编号为冀审棉20190013）。  相似文献   

旱地棉花主要促控措施的产量效应分析     

南建福  赵中华 《山西农业大学学报(自然科学版)》1992,12(1):4-7

本文根据三年试验结果所建立的数学模型,结合4—9月份的不同降雨量条件,对旱地棉花增加种植密度以后各种促控措施(施(?)量、施磷量、打顶日期、化控日期)的合理定量进行了分析。结果认为:早地棉花的高产栽培方案应以种植密度和磷肥的合理定量为基本內容,氮肥、打顶和化控作为依据天气情况和苗情酌情实施的调节措施。最后,依据试验结果,对方案的可行性及优点进行了讨论。  相似文献   

叉斑巨齿蛛的研究   总被引：3，自引：0，他引：3  

赵敬钊  刘凤想 《中国生物防治》1985,(4)

在武汉地区叉班巨齿蛛以成蛛和幼蛛越冬,一年4代,有世代重叠现象。第一代平均75天左右,第二代49天左右,第三代45天左右,第四代66天左右。 雌蛛交配一次可终生产受精卵,雌蛛有护卵习性。单头产卵袋数最多11个以上;每个卵袋平均卵数为134粒,最多有277粒。单雌平均产卵量883粒,最多1,261粒,平均孵化率70％左右。  相似文献   

Study on Site-specific Nutrient Management in Cotton Field     

YANG Li-ping  Jiang Cheng  JIN Ji-yun  ZHANG Feng-ming 《中国农业科学(英文版)》2001,(1):102-106

The study on the characteristics of spatial variability of soil nutrients and fertilizer recommendations in cotton field under certain conditions of agricultural management was conducted with GIS and systematic approach for soil nutrient constrains. The results showed that of the spatial variability of soil nutrient was greatly related to the management condition of previous crops. Grid sampling and variable rate application technology (VRAT) were the tools that would hopefully increase fertilizer efficiency. The fertilizers were applied where they were needed and at proper rate. Balance fertilization demonstration showed that fertilizer recommendations according to the available nutrient level in soil could decrease fertilizer cost with 657.4 yuan / ha and increase seed cotton yield by 19.8%. A net profit of the balanced fertilization was 5314.9 yuan / ha higher than that of local fertilization practice.  相似文献   

海岛棉综合性状数据库的研制及应用     

由宝昌  梅拥军 《塔里木大学学报》1994,6(2):1-6

本文详细介绍了300份海岛棉种质材料的30个性状记录所建立的综合性状数据库系统的数据来源,软件设计思想,系统功能和特点,数据库管理和统计分析两个子系统间的通讯。该系统的研制对海岛棉种质资源的加工利用和育种工作提供了大量重要信息。  相似文献   

河北省棉花产量灰色理论分析与预测     

张文英  栗雨勤  王有增 《勤云标准版测试》2006,(10)

为了解河北省棉花产量变化的规律,明确今后育种工作的目标和前景,利用灰色系统理论的GM(1,1)模型,依据1980～2003年河北省审定的棉花品种的区域试验产量,建立预测模型为:^X(1)(k 1)=38965.718385e0.024221-37990.718385。并在生产因素保持相对稳定的条件下,据此模型对河北省棉花生产进行规划性预测,为生产的规划与决策提供科学信息。明确棉花育种的总体目标是优化品种和品质结构,保持适纺中支纱品种选育的优势,重视发展目前市场短缺的长绒和中短绒陆地棉新品种选育。  相似文献   

湖南高品质棉研究进展与发展对策     

张志刚  肖立一  杨晓萍 《中国农学通报》2005,21(9):195-197

根据国家将长江中下游棉区定位为50￣60支纱生产基地的区划要求,分析国内外及湖南棉区高品质棉的研究现状及发展前景,并针对限制湖南高品质棉发展的“瓶颈”因素提出了加强纺织技术改造,是当务之急,创造与引进优异新种质新材料、遗传品质改良工程,优异纤维品质的基因工程是根本途径,加速新品种选育是重中之重。  相似文献   

单对汰选方法在加速抗高效氯氟氰菊酯棉铃虫品系汰选中的应用   总被引：1，自引：0，他引：1  

卢美光  范贤林 《农药学学报》2002,4(2):89-92

通过设计杂合种群单对杂交方式,研究了加速获得抗性品系的方法。以高效氯氟氰菊酯群体汰选后抗性倍数为4.9倍的棉铃虫种群及其同源对照种群为材料,同时设置常规群体汰选方法与单对汰选方法,研究单对汰选方法在加速抗高效氯氟氰菊酯棉铃虫品系汰选中的作用。结果表明,群体汰选两代后抗性倍数由4.9倍提高到7.4倍, 而单对汰选两代后抗性倍数由4.9倍提高到27.3倍。表明在常规群体汰选中穿插几代单对汰选方法可明显加快棉铃虫种群对高效氯氟氰菊酯的抗性汰选进程。  相似文献   

Laboratory evaluation of the insect growth regulator lufenuron againstHelicoverpa armigera on cotton     

Butter  N. S.  Singh  Gurmeet  Dhawan  A. K. 《Phytoparasitica》2003,31(2):200-203

An insect growth regulator (IGR), lufenuron (Match 5EC), was tested for its toxicity toHelicoverpa armigera on cotton. Potency of the IGR against the larval stage of the pest was demonstrated with respect to larval instars; the LC₉₀ values of 1st, 2nd, 3rd, 4th and 5th instar larvae were 5.63, 7.89, 8.03, 11.39 and 14.76 mg a.i.l ⁻¹, respectively. However, different larval instars did not differ significantly with respect to LC₅₀ and LC₁₀. IGR-treated larvae had swollen heads and were significantly smaller (1.5–2.3 mm) than the untreated control (2.9 mm). Larval weight was significantly reduced from 190 mg in the control to 50–70 mg in the lufenuron treatment. IGR treatment in the larval stage significantly affected both pupal length and pupal weight. Pupal duration of the test insect was significantly extended by IGR treatment. Pupal deformities, including an inability to shed the last larval skin and formation of larval-pupal intermediates, occurred following treatment. A significant reduction in adult emergence was recorded. In addition, abnormalities in the form of development of cavities in the forewings of adult were evident. A significant decline in fecundity was noted in the studies. http://www.phytoparasitica.org posting Feb. 3, 2003.  相似文献   

黑杨萎蔫枝叶对棉铃虫生殖行为的影响   总被引：3，自引：0，他引：3       下载免费PDF全文

郭线茹  原国辉  李为争  马继盛  沈佐锐 《植物保护学报》2003,30(2):148-152

研究了黑杨(Populus nigra)萎蔫枝叶及其气味对棉铃虫成虫的隐藏部位、产卵部位、交配率及产卵量等的影响，并对黑杨萎蔫枝把在田间诱集到的棉铃虫雌蛾进行了解剖观察。结果表明，在田间，黑杨萎蔫枝把诱集到的棉铃虫93．3％已经交配。在气候箱中，放置黑杨萎蔫枝叶的环境中配对饲养的棉铃虫，经过1个暗期和2个暗期后，其交配率与对照环境中的均无显著差异。在光期开始时，有51．5％的成虫隐藏在饲养笼内所设置的黑杨叶子圆片下，对照纱布圆片下仅有16．7％。叶子圆片所在区域的日平均落卵量显著大于对照区。黑杨萎蔫枝叶及其气味对棉铃虫的产卵前期、产卵持续期、成虫寿命和产下50％的卵所用的时间无显著影响，但饲养笼内有黑杨枝把或黑杨叶片气味存在时，棉铃虫的产卵量比模拟枝把和对照显著提高。  相似文献