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研究了“九二○”、花信灵、云大120、爱多收等生长调节剂和尿素、钾肥、硼肥、锌肥等肥料对籼型不育系安丰A抽穗期、开花期以及柱头活力的影响.结果表明:幼穗分化Ⅵ期末补施尿素和硼肥、喷施花信灵或云大120,并在始穗期喷施“九二○”对延长安丰A柱头活力具有明显作用;幼穗分化Ⅵ期末施用尿素和钾肥、并在始穗后喷施“九二○”能防止安丰A颖花退化,起到保花促花并使单穗日开花高峰与时开花高峰提前的作用,有利于母本与父本的花时相遇.花信灵等其它激素能在一定程度上延长安丰A柱头活力、提早花时,但在幼穗分化Ⅵ期末使用易造成安丰A低位节间伸长而倒伏,在安丰A繁殖制种中不提倡使用. 相似文献
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研究"九二〇"和插植本数对广抗13A繁种的影响。结果表明:每穗总粒数、产量在不同插植本数间有显著或极显著差异;喷施"九二〇"剂量及时期对包颈度、包颈粒数、包颈粒率、每穗总粒数、穴有效穗、产量等特性均产生显著影响;插植本数与喷施"九二〇"剂量及时期共同影响广抗13A抽穗集中程度;广抗13A的繁种产量与穴有效穗、结实率呈极显著正相关,与包颈度、包颈粒数、包颈粒率呈极显著负相关;双本配以始穗期1 d喷施"九二〇"180 g/hm2、始穗期3 d喷施"九二〇"180 g/hm2、始穗期5 d喷施"九二〇"120 g/hm2和三本配以始穗期1 d喷施"九二〇"60 g/hm2、始穗期3 d喷施"九二〇"60 g/hm2、始穗期5 d喷施"九二〇"120 g/hm2处理的产量效果较好。 相似文献
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水稻光温敏核不育系9771S异交特性研究 总被引：1，自引：1，他引：0
对9771S异交特性研究表明:9771S见穗后第2天即开花,但在见穗后第7天才进入盛花期;其抽穗盛期出现在见穗后的第5～9天;从日开花动态来看9771S花时集中,日开花高峰为10:00—12:00,午前花率为71.9%;颖花张开角度为28.54°,张颖历期达95.9 min,柱头活力持续时间为4 d,比对照陆18S短1 d;柱头外露率高,包颈率低;对"九二○"反应较钝感,在刚破口时喷施450～525 g/hm2可以取得良好的解除包颈效果。9771S具有较高的异交结实潜力,在制种上根据亲本特性采取相应的技术措施可以获得高产。 相似文献
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水稻不育系穗下节节间的伸长与“九二0”效应 总被引：1，自引：0，他引：1
水稻不育系穗下节节间短是造成包颈的主要原因,穗下节节间伸长期为幼穗分化Ⅵ～Ⅷ期,此时喷施“九二０”效果最好,“九二０”的喷施次数以２～３次为宜。 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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实施茶叶优势区域规划促进川茶产业持续发展 总被引：1，自引：0，他引：1
为了充分发挥四川茶叶的比较优势和自然资源优势,进一步提高川茶产业竞争力和促进农民增收,在四川省委、省政府重视下,在开展特色茶叶产品研究的基础上,制订了<四川省茶叶优势区域规划>,以期通过"规划"的实施,在基地建设、规模化生产、产业化经营等方面取得新的突破,为四川省盆周山区和丘陵地区的农村经济发展和农民增收做出新的更大贡献. 相似文献