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选用新陆中48号,使用无人机喷施化学封顶剂“摇钱素”（质量分数20%的矮壮·甲哌钅翁 水剂）,以人工打顶为对照,探索化学封顶剂对新疆南疆棉花产量和纤维品质的影响。结果表明：与人工打顶相比,喷施“摇钱素”封顶的棉花株高增加17.1 cm,单株结铃数增加1.1,衣分高1.2百分点,籽指高0.22 g,衣指高0.62 g。喷施“摇钱素”封顶的棉花666.7 m2籽棉产量、皮棉产量和纺纱均匀性指数、纤维上半部平均长度、长度整齐度指数、断裂比强度均高于人工打顶。可见,无人机喷施“摇钱素”封顶可有效抑制棉花顶端优势,降低人工成本和生产成本,不会降低产量和纤维品质,可替代传统人工打顶。 相似文献
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为了验证赣北棉区棉花后期化学药剂打顶对其顶部生长发育及产量的影响,完善棉花化学打顶技术在江西的本土化应用,于2014年棉花打顶期,设置了不打顶、人工打顶、喷施不同浓度的化学打顶剂处理,调查各处理喷药后的棉花生长发育情况及产量性状。结果表明:一是与不打顶相比,棉花后期喷施适宜浓度的化学打顶剂,可以极显著地降低棉花的株高、抑制棉株上部果枝的伸长,控制棉株顶部果枝及主茎节间的伸长,减少无效果节数,塑造合理的株型,起到了类似或优于人工打顶的效果;二是在棉花常规打顶适期喷施化学打顶M剂1125 ml/hm2加Y剂750 ml/hm2,其霜前籽棉产量和铃重显著高于人工打顶处理,略高于不打顶处理。 相似文献
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2021年在新疆库尔勒以长绒棉新海57号和新海62号为研究对象,设置人工打顶对照,比较5种化学打顶剂对其主要农艺性状、产量性状及纤维品质指标的影响,以筛选适合应用于长绒棉的化学打顶剂。结果表明,不同化学打顶剂对长绒棉农艺、产量和纤维品质性状均有不同程度的影响。不同化学打顶剂对长绒棉株高和单株果枝数均有调控效果;对产量有显著影响,且与打顶剂种类和品种特性有关,棉顶封(250 g·L-1甲哌钅翁)、抑顶[40%(质量分数,下同)氟节胺]、丝路棉都(20%矮壮·甲哌钅翁)和自封鼎(98%甲哌钅翁)综合效果较好;对纤维品质的影响有差异但不显著,其中丝路棉都、自封鼎和棉顶封对纤维品质影响较小。综合化学打顶对农艺、产量和纤维品质性状的影响,认为棉顶封在长绒棉上的应用效果最好,丝路棉都次之。 相似文献
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比较抑顶（40%氟节胺,质量分数,下同）、快斧（25%氟节胺）、摇钱素（17%矮壮素、3%甲哌钅翁 ）、棉定封（250 g·L－1甲哌钅翁 ）、豪邦手（98%甲哌钅翁 ）5种化学打顶剂处理和人工打顶的棉花农艺性状、产量及品质指标,并用投影寻踪法进行综合评价,以期明确化学打顶剂的效果及合理的效果评价方法,为集成棉花轻简化栽培技术提供依据。方差分析表明,不同打顶处理对棉花株高、中下部有效果枝数、下部结铃数、内围结铃数、上部和下部铃重、整株平均铃重、上部和下部衣分、666.7 m2籽棉产量、666.7 m2皮棉产量、上半部平均长度、断裂比强度、纺纱均匀性指数和长度整齐度指数均无显著影响。摇钱素处理可显著增加单株上部有效果枝数、单株有效果枝数、单株中部结铃数、单株上部结铃数、单株外围结铃数、单株结铃数;抑顶、棉定封处理间籽指无显著差异,但均显著高于快斧;摇钱素、人工打顶处理间马克隆值无显著差异,但均显著低于其余处理。投影寻踪法综合评价表明,不同处理综合效果依次为摇钱素＞人工打顶＞抑顶、棉定封＞豪邦手＞快斧。 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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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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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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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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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 相似文献
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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。 相似文献