浅议秦汉时期的关中水利与农业发展

分析了秦汉时期关中地区的水利布局情况,并揭示了水利于当时农业的重要影响。     

光箨篌竹立竹度,轮伐期试验研究

对光箨篌竹林立竹度、轮伐期的试验研究结果表明,其最佳立竹度为3500株/0.07hm~2,合理的伐期为1a,这样,不但能提高单位面积1年生竹产量与质量,同时还能较大地提高竹材产出量。     

中国药用植物中单宁及多酚类化学成分的研究

从１２种中国药用植物中分离到１１３个单宁及多酚类化合物，经波谱分析及化学方法鉴定了它们的结构。其中１９个为新化合物。     

果戈里大街沥青混凝土路面裂缝的原因与防治

针对哈尔滨市南岗区果戈里大街的路面设计、施工状况的调查,分析了沥青路面裂缝原因与几个因素的关系,并结合有关资料提出一些防治措施。     

冬季施工过程混凝土控制裂缝的预防措施

在我国寒冷地区,冬季建筑工程施工常常出现质量问题,即易出现混凝土裂缝和钢筋锈蚀等现象.该文有针对性地论述了三种预防措施.     

吉林省农业信息化建设的制约因素与改进措施

吉林省是我国主要的产粮大省,农业是其重要的支柱产业。随着社会的不断发展,我国对农业生产的重视程度也在不断提高,农业信息服务成为全社会广泛关注的热点。文章分析了吉林省农业信息化建设的制约因素,如信息服务资源供给不足、农业信息终端处于劣势地位、信息化平台应用程度较低等,提出了强化各级政府部门信息化意识、加大资金投入力度、加大农业信息技术人才培养和储备力度等改进措施,以期促进吉林省农业信息化建设。     

云南木蠹象的研究进展

云南木蠹象是近年来在我国西南地区发生的一种危害云南松幼林的重要的钻蛀性害虫,是我国的特有物种,其寄主专一,因其在西南地区危害云南松而得名.目前仅发生在云南、四川和贵州地区,其他省区暂未见报道,属于典型的区域分布型物种,在我国西南地区的危险等级为中度.该虫主要通过危害树干和枝梢的形成层、木质部和髓心部,导致受害的植株失去正常的生理功能,危害严重时导致幼树死亡.为了深入研究该害虫,探讨合理的治理策略,该文对国内外有关云南木蠹象的形态学、生物学、适生性、危险性和防治方法的研究进展进行了系统总结,明确了该害虫在我国西南地区的发生和危害的历史过程,并对目前存在的问题和今后的研究进行了分析、展望,以期为云南木蠹象的防治提供参考.     

Nutrient and heavy metals in decaying harvest residue needles on drained blanket peat forests

Harvest residue decomposition can significantly contribute to nutrient and heavy metal exports to receiving water courses. This study monitors the nutrient and heavy metal dynamics in decaying Sitka spruce and lodgepole pine harvest residue needles on Atlantic blanket peat forests in the west of Ireland. Using the litterbag method, harvest residue was placed both within and between furrows in two uncut forest and two clear-cut sites. On the clear-cut sites, the litterbags were positioned outside the harvest residue piles (i.e. brash windrows). Over the 2-year monitoring period, the needles decomposed slower at the clear-cut sites than the uncut forest sites, with mass losses of 46–55 and 58–77 %, respectively. Approximately 20 % less phosphorous (P) was released from the decaying needles at the clear-cut sites, while nitrogen (N) was released only at the uncut sites. Tree species was a significant factor contributing to nutrient and heavy metal release and accumulation patterns, with higher concentrations of aluminium (Al), nickel (Ni), cadmium (Cd) and zinc (Zn) in the decaying spruce needles than in pine. Conversely, the spruce needles showed accelerated depletion of calcium (Ca) and magnesium (Mg) relative to the pine. The harvest residue needle positioning (inside furrow/between furrows) and the site soil characteristics contributed significantly to Al transformations in spruce needles and iron (Fe) in both spruce and pine needles, with more accumulation occurring inside the furrows where Al and Fe contents of the peat were high. Manganese (Mn) was released from the needles in three of the four sites with a total release of over 90 % within 2 years. In the remaining site, where the Mn content of the peat was high, an accumulation of Mn in the needles was observed. The decomposition of needles on blanket peat catchments may be a significant source of P to receiving water courses, owing to their fast release of P, but not a likely source for N export.     

机采棉花品种新6015选育及栽培技术

新6015于2021年8月通过新疆维吾尔自治区农作物品种审定委员会审定。该品种较对照增产明显,按新疆棉花品种审定标准纤维品质达Ⅰ型品种标准,高抗枯萎病,耐黄萎病。介绍了新6015的选育过程、主要形态与农艺性状、产量表现、纤维品质、抗病性、适宜区域及栽培技术要点等。     

浅议科研人员如何做到“以人为本”

以"以人为本"为核心的科学发展观,应该成为现代科研院所建设的根本指导思想。文章从以自己为本、以他人为本、以科研团队为本的角度阐述了科研人员如何做到"以人为本",并指出只有科研人员做到了"以人为本",才能成就自己,激励他人,促进科研团队和院所的和谐发展。