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通过汇总分析瓮安县5年来21个玉米3414肥效试验结果,总结出瓮安县不同产量水平玉米氮磷钾肥施肥比例。玉米产量小于500kg/667m2的地块施肥比例为N∶P2O5∶K2O=1∶0.49∶0.91,玉米产量在500~600kg/667m2的地块施肥比例为N∶P2O5∶K2O=1∶0.56∶0.86,玉米产量在600~700kg/667m2的地块施肥比例为N∶P2O5∶K2O=1∶0.6∶0.94,玉米产量大于700kg/667m2的地块施肥比例为N∶P2O5∶K2O=1∶0.66∶0.98。 相似文献
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通过田间试验,研究不同氮磷钾用量及其配比对杂交玉米新品种黔单21产量的影响,探索氮磷钾的最佳施肥量和配施比例.结果表明:黔单21氮磷钾的最佳施肥量是N11.1 kg/667 m2,P2O57.5 kg/667 m2,K2O 7.5 kg/667 m2,产量达686.11kg/667m2,纯收入选641.80元/667m2.较不施肥处理、P2K2、N2P2、N2K2处理分别增产176.02%、50.88%、50.88%和25.33%.较不施肥、P2K2、N2P2、N2K2处理分别增收525.10、550.10、329.53、265.0元/667 m2.氮磷钾的增产增收效果从高到低的排列为:氮>钾>磷. 相似文献
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在增施有机肥料的基础上,开展最佳目标产量水平下的减量化施肥试验,根据不同水平试验区组产量进分析,确定可以接受的减量水平.通过试验得出:施有机肥240kg/667m2,尿素(N 46%)12.33kg/667 m2,氯化钾(K2O 60%)5.77kg/667m2,单产578.0kg/667m2,与产量最高的施肥处理相比,低1.7%,产量差异不显著,但比最高单产处理施尿素(N46%)18.48kg/667m2、普钙(P2O5 14%)46.43kg/667m2、氯化钾(K2O60%)11.67kg/667m2的减少化肥用量58.48kg/667m2. 相似文献
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应用"3414"田间肥效试验设计,对当地主推品种遵玉8号杂交玉米开展了配方施肥效应试验研究,通过对建立的肥料效应函数拟合分析,结果表明:在该区域种植遵玉8号,当肥料的最大施用量为N、P2O5、K2O分别为11.97kg/667m2、9.72kg/667m2、19.92kg/667m2,玉米最高产量594.82kg/667m2;当N、P2O5、K2O最佳施用量分别为9.26kg/667m2,5.77kg/667m2,7.92kg/667m2,玉米产量572.63kg/667m2。 相似文献
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通过汇总分析瓮安县5年来19个水稻3414肥效试验结果,总结出瓮安县不同产量水平水稻氮磷钾肥施肥比例。水稻产量小于550kg/667m2的地块施肥比例为N∶P2O5∶K2O=1∶0.58∶0.73,水稻产量在550~630kg/667m2的地块施肥比例为N∶P2O5∶K2O=1∶0.6∶0.81,水稻产量大于630kg/667m2的地块施肥比例为N∶P2O5∶K2O=1∶0.63∶0.94。 相似文献
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通过3414试验探讨了烟后稻氮磷钾适宜配比,结果表明667m2施N10.27kg、P2O53.03kg、K2O6.45kg时产量最高,667m2施N9.16kg、P2O52.58kg、K2O4.37kg时施肥效益最佳。 相似文献
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通过进行玉米NPK3因素肥效试验,探索玉米氮、磷、钾最佳施肥配比,旨在提高玉米产量和种植效益.试验结果表明,玉米靖丰8号在中等黄泥土中的最佳施肥量为N15.43 kg/667 m2,P2O5 9.27 kg/667 m2,K2O14.92 kg/667m2,可获玉米产量525.12kg/667m2. 相似文献
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采用"3414"试验设计方案,在"六月红"芋田间进行试验,研究氮磷钾适宜配比和最隹施肥量,试验结果表明,施用量N 11.1kg/667m2,P2O53.73kg/667m2,K2O16.7kg/667m2时(N∶P2O5∶K2O=1∶0.34∶1.5)六月红芋产量最高,达1 368kg/667m2;当施用量N10.57kg,P2O53.58kg,K2O15.84kg时(N∶P2O5∶K2O=1∶0.34∶1.5),六月红芋的施肥效益最佳,达4 776元。 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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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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Based on the relation between the incipient yield pressure and the limit of yielding in cylinder according to the elastic disabled rule, a laboratorial method of determining limit of yielding of material is designed and a set of experimental data were gained by the method. The incipient yield pressure of the cylinder is gained by analyzing the experimental data, and then the limit of yielding is gained. The laboratorial method has a good reliability as the experimental value has a little error to the theory value. It has a definite engineering signification and theory value to research the mechanical capability of material and the disabled rule of high pressure vessel. 相似文献
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基于RS与GIS技术,利用景观生态学理论及景观格局指数对布尔津县土地利用现状进行定量分析。结果显示为:(1)布尔津县以草地、林地为主要景观类型,镶嵌着耕地、水域等景观类型。(2)四个分区(即高山区、丘陵区、平原区、荒漠区)的林地资源组成差异明显,耕地、居民、交通及工矿用地集中分布在丘陵区和平原区(3)从各项指数来看,高山区的多样性指数较低;平原区是受人文因素最多的区域,景观优势度低,各种土地利用类型比例差异不大,有利于生态可持续发展,但要合理的开发利用;荒漠区生态环境相对脆弱,要加强生态环境的保护与改善。通过该研究对布尔津县的土地利用现状作一个了解,为该县乃至整个地区的景观规划和可持续发展战略提供科学依据。 相似文献
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Efficiency of water use of early plantings of sunflower 总被引:4,自引:0,他引:4
M. Auxiliadora Soriano Francisco Orgaz Francisco J. Villalobos Elías Fereres 《European Journal of Agronomy》2004,21(4):465-476
Rain fed crop production in Mediterranean environments depends to a large extent on strategies that avoid the intense summer drought. Early plantings of sunflower have given consistently higher yields in such environments, but the basis for such yield increases has not been explored. We conducted two field experiments at Cordoba (Spain) to investigate the effects of an early and a late planting date on the components of water-limited crop productivity; namely, water use (T), water use efficiency (TE) and harvest index (HI) of sunflower. The results were generalized by simulating rain fed sunflower yields, under early (1 January) and late (15 March) plantings, for a 25-year period with the aid of a simulation model of the Ceres type (OILCROP-SUN) which has been validated in Cordoba. Experimental seed yields of early plantings in 1989 and 1996 were 2.0 and 3.0 t ha−1, while late plantings yields were 1.3 and 2.4 t ha−1, for the 2 years. Average simulated yields were 2.7 ± 1.1 and 1.9 ± 0.7 t ha−1 for early and late plantings, respectively. For the 2 years, T of early plantings was higher than that of late plantings, but the response of TE and HI to planting date was not the same in the two experiments. In the simulation exercise, T and TE of early plantings were consistently higher than those of late plantings, while there were no differences in the HI for the two planting dates. We conclude that early plantings of sunflower increase rain fed yields by increasing both T and TE, while the impact of planting date on HI very much depends on the crop water stress pattern, which is quite variable from year to year even in the predictable Mediterranean environment. 相似文献