玉米品种毕单18号在海南的高产制种技术

毕单18号是贵州省毕节地区农科所2001年用自选自交系02H58作母本、自选玉米自交系82作父本组配选育而成的杂交玉米新品种,于2007年通过贵州省农作物品种审定委员会审定。该品种高产稳产、品质好、抗逆性强、适应性广,是贵州山区目前较理想的杂交玉米新品种。为充分发挥该品种的增产潜力,研究提出相应的高产制种配套技术,近3年来,通过对毕单18号在海南高产制种技术的试验研究,总结提出以下高产制种技术规范。     

高产、优质杂交玉米新品种安单4号的选育与应用

安单4号是安顺市农业科学研究所在“十五”贵州省杂交玉米育种协作攻关期间，用自选系“78-002”为母本，外引材料自选系“D902”为父本育成的杂交玉米新品种。该品种生育期130d左右，高产稳产，籽粒黄色，品质优良，适宜在贵州海拔1000—1800m区域及类似生态区域种植。于2004年6月通过贵州省农作物品种审定委员会审定命名，准予推广应用。     

玉米杂交种毕单4号的选育研究

毕单4号系毕节地区农业科学研究所针对黔西北山区自然生态特点和玉米生产实际,于1982年以墨白玉米种质自选系405为母本,以330天然杂株自选系411为父本组配而成的高产、优质、多抗、广适杂交玉米组合。该组合于1992年6月通过贵州省农作物品种审定委员会审定,已在大面积生产上推广应用。     

杂交玉米新组合安单3号高产制种技术

安单3号是贵州省安顺市农科所根据贵州立体农业生态特点。用自交系安1441为母本、自交系苏65为父本组配而成的丰产、优质、适应性较广的杂交玉米单交种组合。2年省区试平均产量8765．4kg／hm^2。比对照增产13．16％；生产试验平均产量为7958．61kg／hm^2。比对照增产29．5％。各项品质指标均达到国家一级粮饲兼用玉米品质标准。该品种生育期130d，适宜在贵州1000—1880m及类似生态区域种植。2003年7月通过贵州省审定（黔审T,200313—4），2004年获贵州省重点科技成果推广项目资助。同年申请了农业部植物新品种保护。2005年获国家科技成果转化资金项目资助。安单3号具有较高的开发推广价值。已成为贵州省杂交玉米推广的品牌组合。为进一步促进其规模化转化程度，在高产制种研究基础上提出了高产实用制种技术措施。     

玉米品种漯玉336高产高效制种技术

漯玉336是漯河市农业科学院以自选系R2005为母本、外引系昌7-2为父本杂交选育而成的玉米品种,2010年通过河南省农作物品种审定委员会审定,具有高产、稳产、综合抗逆性强的特点,为黄淮海南部玉米产量提高作出了积极贡献。为进一步加快该品种的推广应用,为玉米生产提供优质种子,根据漯玉336亲本特征特性和多年试验研究,总结出了一套漯玉336高产高效杂交制种技术,为玉米杂交制种提供理论依据,进而指导杂交种的生产。     

锦单1021号玉米制种存在的问题及解决办法

<正>锦单1021号玉米是锦州农科院2002年以自选系6-4为母本、J801为父本组配的玉米单交种,于2007年经辽宁省品种审定委员会审定。近2年来,随着制种面积逐年增加和用种量的不断扩大,其在制种方面存     

粮饲兼用杂交玉米新组合"安单三号"选育与应用

"安单三号"(原试验名:安单166)是贵州省安顺市农科所根据贵州"立体农业生态"特点,用自选系"安1441"为母本,"苏65"为父本组配而成的丰产、优质、适应性较广的杂交玉米单交种.2年省区试平均产量8 769.4 kg/hm2,比对照增产13.16%;生产试验平均产量7 958.61 kg/hm2,较对照增产29.50%.其品质经农业部谷物及制品监督检验测试中心(哈尔滨)测试,各项指标均达到国家一级粮饲兼用玉米品质标准.该品种生育期130 d,适宜在贵州海拔1 000～1 880 m区域及类似生态区种植.2003年7月通过贵州省品种审定委员会审定.     

玉米杂交品种农华221的选育及应用

农华221是北京金色农华种业科技股份有限公司以自选系11A341为母本、自选系NS0921为父本杂交组配而成的普通玉米新品种,于2019年3月通过黄淮海夏播玉米区国家农作物品种审定委员会审定(审定编号:国审玉20190035)。该品种具有优质、高产、矮秆、抗倒、脱水快、出籽率高等优点。对该品种亲本来源及选育过程、特征特性进行阐述,同时对农华221的制种及高产栽培进行研究,以期为品种的科学推广提供参考。     

顺单6号亲本繁殖及杂交种制种

顺单6号是安顺市农科院选育的高产、优质、耐密型山区玉米杂交种,大面积推广应用表现较好的丰产性、稳定性、适应性、抗逆性、耐密性和保绿性,适宜贵州省中西部及四川、广西、云南等类似生态区种植。本文结合多年来大面积制种生产实际,较详细地总结了“顺单6号”亲本繁殖及高产制种技术措施,以期为制、繁种基地农户提供技术指导,促进该品种更好更快转化为现实生产力。     

优质高产多抗玉米良种辽613

辽 613是由辽宁省农科院玉米研究所利用自选系辽 68做母本、外引系丹 340做父本育成的优质、高产、多抗玉米良种. 2004年通过国家农作物品种审定委员会审定,同年被国家农业部列为重点推广品种.     

油菜的生长发育和醣、氮及脂肪代谢特点的初步研究

研究了不同类型油菜品种外部器官的形成、生长与体內醣、氮及脂肪代谢的关系。产量以甘兰类型较白菜类型高。叶面积高峯出现在盛花期前后,净同化率呈“S”形曲线。现蕾抽苔期醣代谢起着主导作用,绝大多数同化产物分配在茎中,同时需肥最多。种子成熟过程含油量的增长,主要由醣转化而成。     

氮肥水平对强筋小麦产量和氮素利用的影响

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。     

辽宁春季界限温度发生日期的预报方法研究

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。     

Resources,representation, and authority in Jharkhand,India

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.     

Sensitivity of Corn, Oats, Peanuts, Rice, Rye, Sorghum, Soybean and Tobacco to UV-B Radiation under Growth Chamber Conditions

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).     

Addition, Subtraction, Multiplication, Division, Involution and Factorial of High Effective Locations

This paper presents the class of high effective locations and its addition, subtraction, multiplication, division, involution and factorial by the object-oriented programming.     

The origin,evolution, cultivation,dissemination, and diversification of Asian and African rices

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.