大兴安岭林区森工采运方式现状及发展趋势研究

本文论述了大兴安岭林区采运方式现状。分析了影响采运方式的因紊。提出了今后的发展方向。     

Potential Effects of Temperature on Early Reproductive Development and Progeny Performance in Picea abies (L.) Karst

In order to enhance cone production in Norway spruce [Picea abies (L.) Karst] seed orchards have been established in more southerly, warmer sites in Norway. This has led to concern and some evidence that seedlings obtained from parent trees grown at warmer sites may not be well adapted if planted in northern regions. Selective events during sexual reproduction in the warmer climate may select for traits not well adapted for cold climates. This study describes ovule and male gametophyte development, fertilization and proembryo and early embryo development under six different temperature regimens of warm or cold, warm-cold or cold-warm, and compares development in relation to temperature sums in degree days (dd) and calendar date. The outside treatment in a cold climate in Norway served as the control, and normal development and few ovule abortions and abnormalities were observed. In no treatments were abnormalities in male gametophyte development observed. In treatments in which trees were kept in the greenhouse throughout the study or moved during the study from the outside to inside the greenhouse, a higher incidence of megagametophyte, egg or embryo abortion was generally observed.     

浅谈江苏省苹果区域发展战略

论述了江苏苹果产业发展的现状,分析了江苏苹果区域比较优势,提出了江苏苹果优势区域发展战略措施.     

光照对长白梅木生长发育的影响

研究不同遮光度对栽培长白椽木生长发育的影响。结果表明，适度遮光可促进长白槐木的生长，提高植株高度，但对茎粗促进作用不明显。适度遮光更有利于植株干物质的积累，但是重度遮光不利于长白橡木种子的成熟。不同遮光处理延迟了长白橡木的开花期和结果期，尤其是80％遮光处理，到了秋季枯萎期种子不能成熟。田间观察30％、50％遮光处理并没有影响种子的成熟，因此，只有重度遮光不利于长白橡木种子成熟。     

德本F1蓝本F1牛适应性分析研究

研究了德国黄牛和比利时蓝牛的杂种后代德本F1、蓝本F1牛在甘肃省陇东地区肉牛带的适应性能，主要包括生长发育、增重、抗病性和繁殖性能等因素。结果表明德本F1、蓝本F1牛在试验期内（0～12月龄）的各项指标均优于本地牛，对当地饲养条件和环境条件表现出了良好的适应能力，可以在当地推广应用。     

不同冬小麦品种的离体叶片失水速率差异及对供水的反应

较低的离体叶片失水速率(RWL)与抗旱性有关已经得到很多研究者的认同.选取8个冬小麦品种为试材,设置干旱(0水)、节水(2水)和足水(4水)的水分条件,研究不同冬小麦品种对供水条件的反应和生育时期的RWL变化特征.结果表明:不同品种间的RWL差异不显著.RWL随着灌水次数的增加而增高.0水处理的衡7228 RWL最低,冀5579和石麦16也较低.2水处理的石麦16最低,石麦14和冀5579也较低.4水处理下,石新618 的RWL最低,石麦14和衡7228较低,综合3种灌水结果,石麦16、冀5579和石麦14抗旱节水性较好.RWL随着生育进程而变化,拔节期较低,逐渐增加,至抽穗期达到峰值,此后明显下降,直至成熟.前期控水对降低小麦离体叶片失水速率,提高抗旱节水性有利.     

对循环经济模式的思考

循环经济是一种资源闭环利用型经济。发展循环经济是缓解资源约事矛盾的根本出路，是从根本上减轻环境污染的有效途径，是提高经济效益的重要措施，是应对新贸易保护主义的迫切需要，是以人为本，实现可持续发展的本质要求。     

发挥农业综合开发“助推器”作用做大做强龙虾产业

盱眙县境内湖泊众多，水产资源十分丰富。著名的“盱眙龙虾”集养殖、加工、销售于一体的经济已成为当地主导产业，对发展农村经济、增加农民收入起着重要作用。盱眙农业综合开发紧紧围绕做大做强龙虾产业，通过建基地、办市场、扶企业、强产业。发挥农业开发“助推器”作用，促进了龙虾生产与销售，加速了龙虾产业的发展。     

江西苎麻产业化发展的若干思考

分析了江西苎麻业的发展现状和机遇,以及发展苎麻生产的优势,指出了江西苎麻业所面临的各种挑战,并提出了相关发展对策。     

Effect of Temperature and Photoperiod on the Development of Lupinus albus L. in a Controlled Environment

An experiment to determine the effect of temperature and photoperiod on Lupinus albus under controlled environmental conditions was carried out, using the three Lupinus albus genotypes 'Tifwhite', 'Esta' and 'Kiev', and three temperature (10/20, 18/28 and 20 °C continuously) and two photoperiod (8 and 16 h daylength) regimes, in all combinations. Half of the seeds were vernalized for 21 days at 4 °C to alleviate the obligate vernalization requirement of Tifwhite. Although Esta and Kiev do not have obligate vernalization requirements, they were influenced by this vernalization period. Observations included the duration of the period from planting to seedling emergence, the duration of the period from planting to the beginning of flowering and the duration of flowering. The vernalization treatment accelerated plant development in all genotypes. The period from planting to emergence was shorter under the higher temperature regime. For all genotypes, the period from planting to flowering was shorter under the longer photoperiod, the same trend as would be expected for long-day plants. Duration of flowering periods were, in contrast to pre-flowering periods, shorter for all genotypes at cooler temperatures. The results of this study confirm that photoperiod does contribute to the growth period from planting to flowering in L. albus and that this species does behave as a long-day plant.