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研究了玉米专用复合药肥对玉米产量及防治地下害虫效果的影响。试验证明，玉米专用复合药肥对玉米不仅有明显的增产效果，而且防治地下害虫效果达１００％，防治苗期害虫效果６５％。其根本原因是玉米专用复合药 肥不仅含Ｎ、Ｐ、Ｋ一元素，而且还含有杀虫剂，药效独特，免种子包衣，农民应用省工、省时、省力。 相似文献
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玉米是大连地区主要粮食作物，播种面积达１６万ｈｍ２。近几年来，玉米病害在本地区呈逐渐加重趋势，每年造成的产量损失超过１０％。由于玉米是一种单位规模经济效益相对较低的作物，难以应用高投入的防治技术，给病害防治工作带来了困难。作者自１９９５年开始探讨应用... 相似文献
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近年来，随着农业生产水平的提高、品种的更换及耕作方式的改变，玉米病虫害的发生和危害呈加重趋势，发生严重的有玉米大斑病、小斑病、青枯病、褐斑病等，常见虫害有玉米螟、玉米蚜、玉米蓟马、玉米红蜘蛛、地老虎等，种类繁多，且不同生育阶段多有差异。这些病虫害的发生和危害对玉米生产造成了很大影响。在防治时，要采用相应的综合防治策略和措施，才能有效地控制为害。笔者根据近年来的工作实践，总结出玉米播种期、苗期、心叶期和穗期、灌浆成熟期等各生长阶段主要病虫害发生规律及防治对策。 相似文献
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陇南玉米田优势鼠害调查与防治 总被引：1，自引：0，他引：1
通过1998－2000年近3年的田间调查和防治试验研究，基本明确了陇南玉米田间的优势害鼠种类为小家鼠，褐家鼠，大仓鼠和中华鼢鼠，并对这些害鼠的发生为害规律进行了初步的调查，总结出了较为可行有效的防治措施。 相似文献
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综述了我国玉米病毒病防治技术的研究历史、现状及进展。着重介绍了抗病育种、农业防治、化学防治、治虫防病和生态防治等措施防治玉米病毒病的研究进展。并讨论了我国玉米病毒病防治技术中存在的问题及发展方向。 相似文献
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1999年 ,美国中南部增种转 Bt基因玉米 ,占总耕地面积的 50 % ,取得了成功。阿肯色州大学的小麦和谷类推广专家 William Johnson说 ,1 999年大约种植 40 %～ 50 %的转 Bt基因玉米 ,不但有效地防治了西南部和欧洲的玉米螟 ,而且也防治了玉米铃虫 ,即棉花上的棉铃虫。 1 999年密西西比州也大量增种转 Bt基因玉米美国中南部增种转Bt基因玉米@牛巧鱼 相似文献
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玉米新品种生态适应性研究 总被引：2，自引：0，他引：2
2005～2006年在新宁开展了玉米新品种生态适应性试验，结果表明：科玉2号、蠡玉23比对照临奥1号增产幅度较大，其农艺、经济性状较优，适宜该地作春玉米栽培品种推广；洛玉1号产量较高，生育期短，日产量高，其农艺、经济性状较好，适宜该地特别是干旱地区作春玉米栽培；东单57和渝单7号产量优势明显，但应注意中、后期的病害防治。 相似文献
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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。 相似文献
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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. 相似文献
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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。 相似文献
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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 相似文献
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Sena L.P. VanderJagt D.J. Rivera C. Tsin A.T.C. Muhamadu I. Mahamadou O. Millson M. Pastuszyn A. Glew R.H. 《Plant foods for human nutrition (Dordrecht, Netherlands)》1998,52(1):17-30
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. 相似文献
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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。 相似文献
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