充分发挥莽山优势 建设优质绿茶出口基地的建议

1 莽山发展茶叶生产、建设外向型优质绿茶基地的优势 1.1 具有得天独厚的自然条件 莽山(包括莽山林管局、莽山瑶族乡)位于湖南省的东南隅,属南岭山脉北麓。系构成南岭山脉五岭之一的骑田岭支脉,东、南、西三面与广东省乐昌、乳源、阳山、连县接壤。地理位置为东经112°43′19″～113°0′13″。北纬24°53′48″～25°03′12″,属亚热带地区。最高峰猛坑石海拔1902.3m,海拔高于1000m的山     

黄土丘陵沟壑区马铃薯高产高效持续发展的综合配套技术措施

<正>1 西吉县黄家二岔小流域马铃薯生产的自然生态环境西吉县黄家二岔小流域位于黄河中游地区黄土高原中心地带,宁夏南部山区境内,属典型的半干旱黄土丘陵沟壑区.流域面积为5.7cm~2,东经105°29′00″~105°31′40″,北纬35°17′18″~35°58′40″,海拔1860~2135m.当地多年平均降水量为402.2mm,其中,7~9月份降水量占全年降水量的58.6%.年平均气温为5.8℃,极     

古代闽东茶叶史略（上）

闽东,系宁德地区的通称,它地处福建省东北部,东经118°32′30″～120°43′25″,北纬26°18′～27°40′49″之间。土地总面积13396.9平方公里,山地占63.6％。这里属中亚热带海洋性季风气侯,积温高,日照长,雨量充沛,无霜期较长,平均气湿13.4～19℃,年降雨量1641～2347毫米,土壤多红壤、黄壤,自然条件适于茶树栽培生长发育。     

富阳市茶叶生产气候因素分析

浙江省富阳市地处浙西北山地丘陵区,位于北纬29°44′45″～30°11′45″,东经119°25′22”～120°9′18″之间,气候属中亚热带北缘季风区,四季分明,兼有南北之利,利于茶树生长。但富阳市境内多山地丘陵,具有“八山半水分半田”的地理特征,地形变化大,小气候特征明显,同时受季风气候不稳定的影响,茶叶生产易受春冻、夏旱等灾害性天气影响。为进一步促进富阳市茶叶生产稳步发展,特对富阳市茶叶生产气候因素作一分析。     

橡胶树优良亲本RRIM600的研究与利用

RRIM600是20世纪在中国轻寒区大规模推广种植的国外优良橡胶树高产品种,由该品种衍生的热研7-33-97和文昌11已在海南、广东等植胶区大规模推广种植,成为更新胶园的主推品种,热研88-13成为培育高产无性系的重要亲本。为探讨RRIM600作为亲本在中国橡胶树育种上的利用价值,本文分析了该品种在中国推广种植的适应性、农艺性状表现、刺激割胶生理效应、主要衍生品种的品种特性等。结果表明：RRIM600开割前后茎围生长均较快,单位面积产量高,刺激割胶可提高产量,但应注意刺激浓度和频率。以RRIM600为亲本,通过不同育种方法,育种工作者先后育成了热研7-33-97、热研8-79、热研88-13、文昌11等试种级以上品种54个,这些品种都保持了RRIM600的高产特性。因此,RRIM600是一个高产的橡胶树优良亲本,对中国选育高产橡胶树新品种有重要的利用价值。     

充分发挥自然优势搞好啤酒大麦基地建设

梁山县地处鲁西南荷泽地区东北部,位于北纬35°36′36″-35°58′59″和东径115°51′37″-116°21′26″之间,其辖5个区24个乡镇,人口:571754人,全县总面积1447000亩,其中可耕地832368亩,农业人口、人均1.56亩,西北有黄河绕境而过,中部京航运河纵贯南北,县境东北是山东省第二大淡水湖——东平湖.梁山一带属"八百里水泊故地",历史上低洼易涝盐渍并存,荒凉贫穷,群众中流传歌谣是:"水泊蓼儿洼,遍地白花花,(涝积     

平和县发展橡胶种植业的探讨

我县橡胶区位于北纬24°08′～24°48′,东经117°12′～117°47′,是我省四个橡胶基地县(诏安、云霄、平和、漳浦)之一.一、本县发展橡胶种植业的意义与依据巴西橡胶树(HeVea BraSiIienSiS)为     

脱落酸预处理提高橡胶树芽接苗期抗寒性的研究

以热研7-33-97一蓬叶稳定的芽接苗为材料，喷施不同浓度脱落酸(ABA)溶液后，人工气候室4 ℃低温处理，观察橡胶树芽接苗期抗寒性。结果表明，喷施浓度为25-100 mg·L-1的ABA能提高橡胶芽接苗的抗冷性，有效地降低叶片相对电导率，提高叶片内游离脯氨酸的含量、叶绿素含量、超氧化物歧化酶和过氧化物酶活性；25 mg·L-1ABA预处理抗寒效果和经济性最好。     

橡胶树热研7-33-97不同杂交组合子代早期鉴定研究

橡胶树(Hevea brasiliensis）优良品种热研7-33-97具有生长速度快、抗性强、产胶潜力大和干胶理化性能好等优点。为研究热研7-33-97作为杂交亲本选育优良新品种的潜力，分别对热研2-73×热研7-33-97、热研5-11×热研7-33-97、热研7-33-97×海垦1的人工杂交授粉子代进行生长量和产量早期鉴定。结果表明：不同杂交组合子代的茎围生长和产量均有显著差异，热研7-33-97作为父本或者母本均能较好地遗传其速生、高产性状。子代性状的正态分析表明，从热研2-73×热研7-33-97杂交组合子代中选育出胶木兼优品种的可能性较大，从热研5-11×热研7-33-97杂交组合子代中选育出高产品种的可能性较大，从热研7-33-97×海垦1杂交组合子代中有选育出抗风高产品种的可能性。     

饶平县田峰山名茶科技示范基地的建设与展望

一、田峰山名茶科技示范基地的建立与建设一提起田峰山 ,国内外茶人与茶界业士便不陌生 ,它座落于饶平县的西北部 ,既有一定海拔高度 (3 5 0— 690米 ) ,又是坡度小 ,可造永久性梯级高标准茶园的一座独立大山 ,面积 40 0 0亩。田峰山名茶科技示范基地的前身是新丰镇办集体茶场 ,名曰田峰山茶场 ,它位于东经 1 1 6°47′48″,北纬 2 4°3′2 0″,山地土质属黄壤、赤黄壤 ,土层深厚肥沃 ,空气湿润 ,常年云雾缭绕 ,白天日照时间长 ,日夜温差超过 1 0°以上。它所处的地理位置为名茶的种植与加工创造了良好的自然环境 ,同时也吸引了日本、台湾、…     

Allelopathy in Agroecosystems in Spain

Summary

This paper reviews the effects of allelopathic interactions in agroecosystems in Spain on plant physiological activity and their ecological advantages. The phenological stage of growth of donor plants and the effective allelochemicals in the soil solution while studying the role of phenolic compounds were highlighting. Finally possible future prospects and conclusions regarding weed control by allelochemi-cals under integrated crop management strategies are discussed.     

Factors in the Reduction in Grain Number in Winter Wheat by Early-Sowing in Yamaguchi

Abstract

Grain number per spike of wheat is lower in early sowing than in the conventional standard cultivation in Yamaguchi, Prefecture, Japan. Components of the grain number per spike in five cultivars were analyzed with respect to temperature during the spike development period throughout three growing seasons 2001/2002, 2002/2003 and 2003/2004 to find the cause of the problem of early sowing cultivation. The plants sown in early-October and late-November were called the early sown group and the standard group, respectively, in the following. Three of the five cultivars, Hokushin, Akitakko and Nanbukomugi, showed a strong winter habit, which requires very cold temperatures for spike differentiation. The other two cultivars, Iwainodaichi and Airakomugi, had a moderate winter habit. Grain number per spike and grain yield were decreased by early-sowing (compare with the standard group) in almost all cultivars throughout the three growing seasons. The three cultivars which had a strong winter habit had fewer spikelets per spike in the early-sown group than in the standard group. The other two cultivars which had a moderate winter habit had fewer grains per spikelet in the early-sown group. The higher the temperature during the spikelet formation phase, which is from flag leaf initiation to terminal spikelet initiation, the higher the number of spikelets per spike in the standard group. The spikelet number per spike in the early-sown group increased with the increase in productive tillers under fertile conditions. Such conditions also increased the grain number per spike.     

我国干热区甘蔗抗旱植蔗主要问题研讨

我国干热蔗区是我国甘蔗糖业的重要生产基地,蔗区光热资源丰富,唯降水分布不均成为植蔗生产的主要限制因子;根据蔗区植蔗特点和甘蔗需水规律,苗期抗旱是干热蔗区抗旱植蔗的关键,保证较多的总苗数和足够的生长量是苗期抗旱植蔗需解决的关键技术难题,制定相应的苗期抗旱植蔗栽培技术措施是解决该难题的重要保障;该观点为我国干热蔗区植蔗生产、甘蔗引育种提供理论和技术支持。     

Diurnal changes in net photosynthetic rate in potato in two environments

Summary Diurnal changes in net photosynthetic rate were measured in a furrow-irrigated potato crop and in a riverbed crop where the water table was always maintained at 20–28 cm from the soil surface. In the irrigated crop, the photosynthetic rate during mid-afternoon was about half the peak rate observed at noon. This reduction was accompanied by a near tripling of stomatal resistance, a 45% reduction in transpiration, and a 5-fold increase in the difference between leaf and air temperatures. No such changes were observed in the riverbed crop where the photosynthetic rate remained nearly constant at about 0.9 mg m⁻² s⁻¹ between 9 a.m. and 4 p.m. Tuber yield in the riverbed crop was about 30% higher than in the irrigated crop.     

棉花体细胞无性系变异的研究进展

体细胞无性系变异是一种重要的细胞工程育种技术,其应用于棉花育种的前提是建立高效的组织培养诱导再生植株体系.本文简要综述了棉花离体诱导植株再生研究的现状,重点讨论了棉花体细胞无性系变异的表现、利用方法及机理,提出了当前研究存在的问题并对今后的研究进行了展望.     

2009年中国稻米市场分析及2010年展望

以翔实的资料对2009年中国稻米生产、消费、进出口、供求平衡、库存、价格走势、购销政策和国际稻米供求等情况进行了全面地分析,对影响2010年稻米市场价格走势的各种因素进行了深入研究,并在此基础上对2010年我国稻米市场价格走势进行了预测,结论是我国稻米价格仍呈上行趋势。     

Changes in daily rainfall characteristics in major rice producing provinces in Laos

In order to find the changes in rainfall characteristics and to examine the flood damage to lowland rice, a statistical analysis was carried out on the 40-year daily rainfall record at four rainfall stations (Thangon, Paksane, Seno, and Pakse) in Laos. The rainfall record was divided into two periods of 20 years each. The results of this analysis revealed the trends in changes regarding the frequency and the timing of the heavy daily rainfall events at the four stations. In Paksane in particular, heavy daily rainfall events tended to occur in the latter half of the rainy season.     

Sugar and dry matter changes in potatoes overwintered in soil in Greece

Summary Potatoes were left in the soil from December, when the vines died, until February (cvs Claustar and Sebago) or April (cv. Spunta) in a location of central Greece with light, well drained soils and a mild climate. Tubers were analysed every two months for dry matter and sugar content and usually the dry matter content did not change significantly from December to February or April. The reducing sugars increased from December to February in tubers of all cultivars and significantly decreased in cv. Spunta from February to April.     

兜兰离体快繁技术研究进展

由于生境破坏和人工过度采挖及繁殖的障碍,兜兰已是世界上最濒危的植物物种之一,所有野生种均被列入《濒危野生动植物种国际贸易公约》附录I而被禁止交易。突破其种苗繁殖技术瓶颈有利于兜兰种质资源的保护和可持续利用。本文对兜兰属植物无菌播种、共生萌发和组织培养技术等离体快繁技术的进展进行综述,并提出了目前存在的问题和解决方法,以期为兜兰属植物离体繁殖技术的深入研究和优质种苗的规模化生产提供参考。     

中国马铃薯单倍体诱导进展

马铃薯产量、品质、加工等方面都较其他作物有更大的提升空间,但由于四倍体马铃薯存在遗传基础狭窄且复杂、难以创新等诸多问题阻碍了相关研究的深入开展。利用马铃薯单倍体或双单倍体植株有望解决上述诸多难题。马铃薯单倍体具有加速育种过程、提高选择效率等优点。马铃薯单倍体的获得包括花药培养、花粉培养、孤雌生殖、子房培养。其中,花药培养因更易取材,并且得到胚性细胞团、愈伤组织或胚状体的几率更大等优点而研究最为广泛。获得单倍体植株的成功率与试验材料的基因型、培养条件、培养基添加物等诸多因素相关。根据不同的诱导方法简要阐述了中国马铃薯单倍体研究的历史及进展。