共查询到20条相似文献，搜索用时 62 毫秒
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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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为优化油菜氮、磷、钾肥配合施用,2012年进行了油菜氮磷钾＂3414＂肥效试验,获得了试验相关参数,土壤供肥量为N：4.836kg/667m2;P2O5：2.085kg/667m2;K2O：3.585kg/667m2。肥料利用率为N：29.48%;P2O5：15.06%;K2O：2.7%,从回归分析结果看得出本地区油菜最佳施肥量：N：14.42kg/667m2;P2O5：11.81kg/667m2;K2O：10.41kg/667m2,可获产量230.41kg/667m2。 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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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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湘中南地区烟稻轮作条件下烟草作物的施肥效应与肥料效应函数研究 总被引：1，自引：2，他引：1
为了建立适合湘中南双季稻地区烟稻轮作制条件下烤烟作物的平衡施肥模型,确定烟草的合理施肥量,运用联合国粮农组织(FAO)“3414”试验方案,稍作修改,通过田间小区试验,探讨湘中南双季稻地区烟稻轮作制条件下烤烟作物施用氮磷钾肥的增产效应及其最佳施肥量,以为烤烟作物的科学施肥提供科学依据和技术支撑。结果表明：烤烟作物的地力贡献较小,无肥区产量仅占氮磷钾平衡施肥处理（处理6）产量的34.6%~39.4%;增产效果居首位的是氮肥,农大,永州,常宁3个试验点分别增产719.6 kg/hm2、1109.7 kg/hm2和441.0 kg/hm2;运用“3414”试验设计方案得到的各试验点的二元二次肥料效应模型拟合均不成功,农大点推荐施肥宜使用一元二次方程模型,据此所得最佳施肥量分别为N 159.8 kg/hm2,P2O5 86.1 kg/hm2,K2O 152.2 kg/hm2;永州点推荐施肥宜使用三元二次方程模型,据此所得最佳施肥量分别为N 175.2 kg/hm2,P2O5 52.1 kg/hm2,K2O 278.3 kg/hm2;常宁点推荐施肥宜使用一元二次方程模型,据此所得最佳施肥量分别为N 178.7 kg/hm2,P2O5 107.8 kg/hm2,K2O 279.2 kg/hm2;综合各函数的最佳施肥量得到湘中南双季稻地区的烟草作物的施肥决策：烤烟作物对氮、磷、钾养分的最佳产量施肥量为N 172.2 kg/hm2,P2O5 93.3 kg/hm2,K2O 300.0 kg/hm2。 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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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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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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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