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马铃薯是天祝藏族自治县重要的粮食作物,马铃薯种植在当地农户脱贫增收和保障粮食安全稳定中发挥着重要作用,确保马铃薯产业高质量发展意义重大。马铃薯种植时,其产量、品质和栽培技术密切相关,将优质高产栽培技术用于马铃薯种植中,是实现马铃薯产业提质增效、增产增收的有效举措。以天祝藏族自治县为例,着重对马铃薯优质高产栽培技术要点展开了深入探析。 相似文献
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定西市是我国著名的马铃薯种植地,该地已形成了一定的品牌效应。近些年,马铃薯种植产业在取得巨大社会经济效益的同时,由于马铃薯种植的特殊性,受病虫害的困扰程度逐年增高。基于此,注重马铃薯种植经济对定西市的经济影响力,为促进该地区马铃薯产业朝着规模化的方向发展,病虫害防治是关键的技术环节,提升马铃薯种植技术水平对该地区经济的发展具有重要的价值和现实意义。 相似文献
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在农作物种类中,马铃薯是常见的一种经济作物,具有很高的营养价值和经济价值。在国家惠农政策支持下,农业生产技术得到了显著创新和发展,朔州市马铃薯种植呈现出规模化、产业化发展趋势,种植技术也更加贴合地区农业实际,马铃薯的市场经济价值不断提高。要保证马铃薯种植技术的高效运用,就需要地区结合实际情况,把握技术应用各环节的要点,实现马铃薯种植全过程的精细化、科学化管理,从而提高马铃薯种植产量和品质,在马铃薯的种植管理中还要重视和加强对常见病害的防治,做好病害预防工作,为马铃薯高产稳产打下坚实基础。本文结合朔州市马铃薯种植情况,对马铃薯种植技术的应用要点进行了分析,并对常见病害的防治提出了相关建议,从而总结推广种植技术,使马铃薯种植取得更好的经济效益。 相似文献
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马铃薯含有大量的淀粉和维生素,营养丰富,是重要的经济作物。马铃薯的抗旱性较强、环境适应性较高。随着社会经济的发展,人们对马铃薯的要求也在不断提高,调整马铃薯种植模式、提高种植技术水平势在必行。旱作覆膜马铃薯种植技术具有增温保墒的效果,能够有效提高马铃薯产量,优化马铃薯品质。文章立足于甘肃地区,分析了该地区的马铃薯种植条件,阐述了旱作覆膜马铃薯种植技术,探索了该技术的推广效益,以供参考。 相似文献
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马铃薯俗称土豆、洋山芋、山洋芋、地蛋等,属于茄科一年草木植物,块茎可供人食用。马铃薯块茎含有大量的淀粉,富含丰富的蛋白质、氨基酸、维生素、矿物质等,可以为人体提供丰富的热量和人体所需的微量元素,是一种接近全价实物。随着马铃薯加工业的发展,对优质马铃薯的需求越来越大,进一步促进了脱毒马铃薯的发展。脱毒马铃薯在生产前,可以对马铃薯进行无害化处理,提高马铃薯抗病害能力。脱毒马铃薯种植技术在于选择高质量的脱毒马铃薯薯种和配套的种植技术,实现马铃薯优质、高产。本文首先简单阐述了脱毒马铃薯的概念,并从马铃薯的选址、选种、薯种处理、播种、田间管理以及病虫害防治等要点,为当地马铃薯种植提供参考。 相似文献
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马铃薯是一种增产作物,为充分发挥增产优势,总结增产种植技术,黑龙江友谊县明确提出病害出现的系统预防对策,合理提高马铃薯种植产量,从而建立促进马铃薯产业链发展和产业结构升级的健康发展趋势,通过研究找到马铃薯的种植增产和防害方法,为马铃薯的健康成长奠定良好的基础。 相似文献
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马铃薯作为一种具有主粮战略意义的农作物,适合种植于我国西北、东北、华北以及西南地区,在一些丘陵、高原地带依旧能栽培种植。四川省凉山州属于亚热带高原季风性气候,具有悠久的马铃薯种植历史,结合我国马铃薯主粮战略计划的发展,迫切需要提升该地区马铃薯种植的产量和质量。因此,四川省凉山州马铃薯种植的栽培技术提升和病虫害防治成为当前需要关注的重点问题。文章立足于主粮战略发展基础,从四川省凉山州的地域特征出发,结合该地区马铃薯种植现状,分析该地区提升马铃薯高产栽培和病虫害防治的途径,提高农户种植马铃薯的积极性,推动马铃薯主粮战略的稳步实施。 相似文献
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氮肥水平对强筋小麦产量和氮素利用的影响 总被引:1,自引:1,他引:0
为明确强筋小麦产量与效率相协同的最优施氮量,试验选用‘济麦20’和‘洲元9369’ 2个优质强筋小麦品种为试验材料,设置0、120、180、240、300 kg N/hm 2等5个施氮水平,用烘干法和凯氏定氮法分别测定小麦成熟期干物质量积累和含氮量,用以计算小麦氮素积累及氮素利用相关指标。结果表明,随氮肥投入量的增加,小麦产量呈现先升高后降低的变化趋势,其中‘济麦20’在N180和N240下达最高产量7.28 t/hm 2和7.26 t/hm 2,其较高的产量主要源于相对平衡的产量构成因素以及较高的干物质积累量(平均18.54 t/hm 2);‘洲元9369’在N180下产量最高达7.75 t/hm 2,其较高的产量主要源于较高的单位面积穗数(970.65万/hm 2)、穗粒数(30.83粒)、较高的干物质积累量(20.77 t/hm 2)和收获指数(37.33%)。虽然氮肥偏生产力随着氮肥施用量的增加逐渐下降,但两品种的氮肥回收效率、氮肥农学利用率和氮肥生理利用效率均可在N180条件下达到最高值,其中,‘济麦20’最高值分别为62.67%、5.71 kg/kg、9.11 kg/kg,‘洲元9369’的最高值分别为63.65%、7.33 kg/kg、11.55 kg/kg。综合产量水平和氮素利用相关指标,本区域强筋小麦生产中产量与氮素利用效率相协同的施氮量为180 kg/hm 2。 相似文献
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辽宁春季界限温度发生日期的预报方法研究 总被引:1,自引:1,他引:0
为了在春季气候预测工作中,尽可能准确地预测辽宁春季稳定通过5℃的日期,采用1961—2010年辽宁省53站逐日气温资料和NCEP/NCAR再分析的月平均位势高度场、海平面气压场资料以及由NOAA重构的月平均海温场资料,通过相关分析方法并开展物理因子的普查工作,寻找辽宁春季稳定通过5℃日期的影响因子,并利用多元线性回归方法建立预报方程。结果表明:1961—2010年辽宁春季气温稳定通过5℃日期随时间有提前出现的趋势;稳定通过5℃日期与2月北大西洋海温、1月西北太平洋海温、2月北极涛动、1月印度洋海温、10月阿留申低压强度和1月北大西洋涛动关系密切;建立的预报稳定通过5℃日期的多元线性回归方程具有显著意义。 相似文献
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Fouad M. Basiouny 《Journal of Agronomy and Crop Science》1986,157(1):31-35
Sensitivity of different agronomic crops to UV-B radiation was studied under environmentally controlled conditions. UV-B radiation reduced plant height, fresh weight, dry weight and ash contents. The reduction varied among the different species tested. Narrow-leaved plants (mainly C4 ) were less sensitive to UV-B than broad-leaved plants (mainly C3 ). 相似文献
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David Stuligross 《Asia Pacific viewpoint》2008,49(1):83-97
Abstract: Jharkhand is at the centre of India's struggles to define ‘the environment’ and ‘economically relevant natural resources’. Although cultural labels are applied by leaders who seek influence in these struggles as well as by many of those people who listen, an ethnonational analytic frame does not help answer the questions: How, why and when has the political idea of environment changed in India? When and why has the Jharkhand movement chosen violent tactics? When and why has the Jharkhand statehood movement realised electoral success? Or, why was Jharkhand state formed? To address such questions, a long range historical‐institutional approach is much more fruitful. 相似文献
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YUAN Zheng-qiang 《保鲜与加工》2000,(5):107-110
This paper presents the class of high effective locations and its addition, subtraction, multiplication, division, involution and factorial by the object-oriented programming. 相似文献
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The origin,evolution, cultivation,dissemination, and diversification of Asian and African rices 总被引:28,自引:0,他引:28
Te-Tzu Chang 《Euphytica》1976,25(1):425-441
Summary Available evidences drawn from biosystematics, evolutionary biology, biogeography, archaeology, history, anthropology, paleo-geology and paleo-meteorology are pooled to reconstruct the series of events that led to the cosmopolitan cultivation of the Asian cultivated rice (O. sativa) and the regionalized planting of the African cultigen (O. glaberrima) in West Africa. The genus Oryza originated in the Gondwanaland continents and, following the fracture of the supercontinent, became widely distributed in the humid tropics of Africa, South America, South and Southeast Asia, and Oceania. The two cultivated species have had a common progenitor in the distant past. Parallel and independent evolutionary processes occurred in Africa and in Asia, following the sequence of: wild perennialwild annualcultivated annual. The weed races also contributed to the differentiation of the cultivated annuals. The corresponding members of the above series are O. longistaminata
Chev. et Roehr., O. barthii
A. Chev., O. glaberrima
Steud., and the stapfii forms of O. glaberrima in Africa; O. rufipogon
Griff., O. nivara
Sharma et Shastry, O. sativa L., and the spontanea forms of O. sativa in Asia.The differentiation and diversification of the annuals in South Asia were accelerated by marked climatic changes following the last glacial age, dispersal of plants over latitude or altitude, human selection, and manipulation of the cultural environment.Cultivation of rice began in many parts of South and Southeast Asia, probably first in Ancient India. Cultural techniques such as puddling and transplanting were first developed in north and central China and later transmitted to Southeast Asia. Wetland culture preceded dryland culture in China, but in hilly areas of Southeast Asia, dryland cultivation is older than lowland culture. The planting method progressed from shifting cultivation to direct sowing in permanent fields, then to transplanting in bunded fields.Widespread dispersal of the Asian cultigen led to the formation of three eco-geographic races (Indica. Sinica or Japonica, and Javanica) and distinct cultural types in monsoon Asia (upland, lowland, and deep water). Varietal types changed readily within the span of a millenium, largely due to cultivators' preferences, socio-religious traditions, and population pressure. Genetic differentiation developed parallel to the ecologic diversification process.The African cultigen developed later than the Asian cultigen and has undergone less diversification. The wild races in South America and Oceania retain their primitive features mainly due to lack of cultivation pressure or dispersal.Both the African and Asian rices are still undergoing evolutionary changes at habitats where the wild, weed, and cultivated races co-exist. 相似文献