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皇草高产配套栽培技术研究 总被引:11,自引:0,他引:11
本试验用田间试验和定量分析的方法研究皇草高产与主要栽培因子之间的数量关系,建立了有关数学模型并作了增产效应分析。在试验条件下,皇草产量要达到216345kg/hm^2,种植密度应为39724窝/hm^2,配施纯N为572.25kg/hm^2,K为187.75kg/hm^2,P为269.48kg/hm^2,达到皇草高产目的。 相似文献
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采用田间试验和定量分析的方法研究了黔油10号制种产量与栽培措施的数量关系,建立了数学模型并作了增产效应分析及有关措施的优化组合,研究结果表明,施用尿素:10.0~25.8kg/667m^2,种植密度:1.4~1.8万株/667m^2。氯化钾;2.5~6.0kg/667m^2,过磷酸钙;36.0~50kg/667m^2,可望获得75~100kg/667m^2的籽粒产量。 相似文献
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春秋玉米高产高效栽培模式研究 总被引:3,自引:0,他引:3
本文采用农业系统工程原理和最优D饱和设计方法探讨了广东省春秋玉米高产高效栽培模式,实步研究认为,春玉米667m^2产达到500~600kg,种植密度为4400~4600株,纯N,P2O5,K2O分别为20~23,15~21,15~18kg/667m^2,秋玉米亩产达到450~500kg,种植密度为4000株以上,纯N,P2O5K2O为24~25,20~22,20~21kg/667m^2,同时表面秋 相似文献
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川中丘区“麦/玉/苕”模式玉米高产综合栽培技术研究 总被引:3,自引:1,他引:2
运用三因素五水平二次正交旋转组合试验设计方法,研究了川中丘区“麦/玉/苕”模式玉米的播种期,栽植密度和氮化肥用量对产量及其主要经济性状的影响,建立了相应的数学模型,得出郑单14在育苗移栽,地膜栽培条件下产量6.75t/hm^2以上的高产栽培技术方案的:播种期3月5-15日,栽植密度6.4-7.0株/m^2,氮化肥用量220-270kg/hm^2。 相似文献
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湘南冬闲稻田小黑麦高产栽培技术研究 总被引:3,自引:0,他引:3
小黑麦高产栽培技术试验研究表明,通过选用良种,适时早播,加强肥水管理等措施可明显提高小黑麦产量。通过3年试种,筛选出产草高,抗性好,生育期适中,耐寒耐瘠薄,适应湘南冬闲稻田大面积种植的小黑麦品种OH1621和H1881,OH1621适时早播(10月29日播种与11月18日播种比较)可使小黑麦增产鲜草19386kg/hm^2,增幅为115.2%;有机肥、无机肥配合(NPK+M)比单纯化肥(NPK)10765.5kg/hm^2,增幅49%.比单施有机肥(OM)增产鲜草11605.5kg/hm^2,增幅55.0%。 相似文献
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对沿海地区种植苏棉8号的适宜密度和最佳施肥量进行了复因素试验,结果每公顷的适宜密度为60000株,最佳施肥量的纯氮22.5kg/hm^2。若劳力紧张,则以密度52500株/hm^2,肥料300kg/hm^2为好。 相似文献
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1997~1998年在贵州省毕节等12县(市)实施农业部丰收计划项目—玉米地膜覆盖及配套增产技术,项目以玉米地膜覆盖为主,配套推广育苗移栽、杂交良种、绿肥聚垄、配方施肥、综合防治病虫害等实用技术,实施两年。共完成有效面积8.772万hm^2,其中1997年4.31万hm^2,1998年4.456万hm^2,项目平均单产371.4kg/667m^2,新增产97.9kg/667m^2,增幅35.8%, 相似文献
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介绍了运用冷冻干燥技术进行速溶蛋花汤的加工,研究了生产工艺、特点以及影响产品质量的主要因素。试验表明,采用冷冻干燥技术加工的速溶蛋花汤,具有营养丰富、风味独特、方便快捷等特点。 相似文献
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DENG Zhao-jing 《保鲜与加工》2005,(1):153-156
A new definition of inertia,i.e. the momentum is the measuring of inertia of matter, is proposed. The article through and etc., subjects, the correctness of the new notion of inertia:The monentum is the measuring of inertia has been demonstrated, and the unsolved contradictions of the traditional definition of inetia. And the mass is the measuring of inertia has been revealed. 相似文献
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香蕉是热带亚热带发展中国家重要的粮食作物和碳水化合物来源。但近年来,香蕉生产受到严重的病虫危害。大多数香蕉栽培品种是三倍体,生长周期长,而且不孕。由于没有种子,给繁殖和育种带来一定的困难。遗传转化技术的发展为香蕉品种的改良提供了一种有效的手段。香蕉的遗传转化方法有电激法、基因枪法、农杆菌介导法等。农杆菌介导法的应用是香蕉品种改良的一个重大突破。香蕉遗传转化的外植体也发展到多种,有原生质体,胚性细胞悬浮系,分生组织,以及横切薄片等。近几年,随着分子生物学的发展,出现了转化效率更高,重复性更好的香蕉遗传转化技术。如农杆菌和基因枪结合法,离心辅助农杆菌介导法、真空渗透技术等。这些新技术新方法的出现,必将推动香蕉产业高速发展。 相似文献
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Automobile comfort dynamic simulation is necessary when we predict and evaluate the comfort of a automobile or optimize performance of automobile. The nine DOF vibration model of automobile is established , which acts root mean square value of body in multiple work conditions as comfort evaluation indices. Based on the comfort simulation, the Hongyan 1160 is predicted in the way of comfort. The programmes can be used in many different automobiles . The computational result indicates that the model can simulate vibration of automobile truly. It is significant to research automobile comfort evaluation to optimize performance of automobile and comfort simulation .The computational program can be applied to optimize or simulate which has some reference value. 相似文献
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南瓜降糖功能及其系列食品加工技术 总被引:3,自引:0,他引:3
阐述了南瓜在糖尿病辅助治疗方面的功能特性,介绍了南瓜降糖主要制品南瓜全粉、南瓜脆片、南瓜果酱和南瓜肉汁的工艺流程和操作要点。 相似文献
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母猪繁殖障碍成因分析 总被引:3,自引:0,他引:3
繁殖障碍是导致母猪淘汰的最主要因素,直接造成母猪非生产天数延长,繁殖猪群生产效率降低,严重影响猪场的经济效益。本文作者对引起母猪繁殖障碍的多方面因素,包括营养因素(如饲养水平、饲料品质、断奶日龄)、环境因素(如温度、湿度、通风、光照)、疫病因素、生产技术及管理因素进行了详细阐述。 相似文献
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Applicability of molecular markers in the context of protection of new varieties of cucumber 总被引:2,自引:0,他引:2
G. P. Bernet S. Bramardi D. Calvache E. A. Carbonell M. J. Asins 《Plant Breeding》2003,122(2):146-152
The growing number of candidate varieties presented every year at each national Plant Variety Protection Office and their decreasing genetic variability forces strategies to be adopted that will reduce costs without losing rigour when deciding about the acceptance or rejection of a candidate variety. Molecular markers have been envisaged as a reliable tool to establish differences, but can molecular markers be used for assessing distinctness? A comparison between a molecular and a morphological characterization of 41 seed samples belonging to 36 cucumber varieties and including several external controls has been carried out to investigate the applicability of molecular markers in the context of distinctness, uniformity and stability (DUS) tests and the protection of new varieties. Both types of character indicate the same relationships among main groups, Dutch and Beth‐Alpha types, and Gerking and Slice types, the correlation between distance matrices being only 0.6489. Varieties considered uniform for morphological traits proved not to be so for molecular markers. Therefore, molecular characterization is not offering the same estimates of uniformity and relatedness between varieties as does morphological characterization. External controls were used to establish distinction limits with morphological and molecular dendrograms to focus on those varieties, which were suspiciously similar. The results with cucumber show that molecular identity could be used to assess any lack of distinctness and so corroborate the morphological assessment of candidate varieties. The morphological trait ‘type’ provides distinct characterization of varieties and the molecular characterization of candidate varieties could be used to design better field experiments to assess distinction within each group of morphological cucumber type. 相似文献