封闭式循环水养殖牙鲆鱼技术初步研究

将新功能滤料、高效混合净水菌团、水质自动监测及控制3项关键技术及配套设备用于封闭式循环水养殖牙鲆鱼。结果表明，封闭循环组成活率可达到90％－95．1％，平均产量为32．2kg/m^2。较对照组养殖密度增加75．6％－102．7％，成活率提高14％－17％，平均产量增加145％－187．5％。充分利用有限的水体，避免海水二次污染，利于环境保护。     

A concept to define a quantitative measure of mixture state

Mixing is a mechanical operation to distribute components evenly in a plane or a space. Composite molding and textile manufacturing industries are routinely taking advantage of mixing operations in order to distribute raw materials uniformly or in a specific way during composite molding or textile producing processes. Key issues to identify any mixed state are (1) the time needed to accomplish through mixing (the time scale) and (2) the extent of the homogeneity of the mixture in a plane (the length scale). In this paper, a new concept of mixture status is focused on the length scale. The goal to derive a new concept of mixture status is to establish a measure to describe the mixed extent of a mixture consisting of two components, derived from clump size and clump distribution. To verify the usefulness of the newly conceived “Mixedness Index”, the suggested definition was compared with the existing coefficient of variation (CV) method based on simulation and experiments. Results showed a reasonable relationship between the Mixedness Index and observation, demonstrating the feasibility of the proposed Mixedness Index for industrial applications.     

Phosphorus fractionation and adsorption characteristics in drinking water reservoir inlet river sediments under human disturbance

Journal of Soils and Sediments - Sediment phosphorus fractionation, adsorption kinetics, and adsorption isotherm characteristics were studied in two rivers, Muyang River and Lengshui River in...     

Light intensity affects the growth and flavonol biosynthesis of Ginkgo (Ginkgo biloba L.)

Response of growth and secondary metabolites to light intensity are useful measurements to determine suitable silviculture treatments for the cultivation of medicinal plants. Here, we analyzed the growth, flavonols (total flavonol, quercetin, kaempferol, and isorhamnetin) content, flavonols yield per plant, and expression of flavonoid biosynthesis-related genes in 2-year Ginkgo (Ginkgo biloba L.) seedlings at four different light intensities (100, 76, 40, and 25 % of full sunlight) in a greenhouse setting. Across all light intensities, the 76 % sunlight treatment produced the highest growth of total biomass, root, stem, and leaf, indicating negative effects of either fulllight or heavy shading on Ginkgo seedling development. Both flavonols (total flavonol, quercetin, kaempferol, and isorhamnetin) content and expression of flavonoid biosynthesis-related genes [PAL (Phenylalanine ammonia-lyase), CHS (Chalcone synthase), F3H (Flavanone 3-hydroxylase), and FLS (Flavonol synthase)] in leaves were highest under 100 % sunlight, suggesting that full sunlight promotes the expression of flavonoid biosynthesis-related genes and increases flavonoid biosynthesis. The highest and lowest flavonol contents were found in leaves and stems, respectively. The 76 % sunlight treatment produced the highest flavonols yield while the 100 % sunlight produced the highest flavonoids content in leaves, indicating that flavonol production per unit land area depends not only flavonol content but also biomass. Overall, in order to achieve the highest flavonols yield per area in Ginkgo leaf-harvesting plantations, it is important to manipulate light conditions of field.     

黑龙江省西瓜细菌性果实腐斑病防治技术

近年来黑龙江省西瓜细菌性果实腐斑病发病严重。园艺分院西瓜研究室对黑龙江省西瓜果斑病的发病症状等进行了4年的调查,并进行了西瓜果斑病防治方法的试验示范,示范地块的果斑病发病率在两年内控制在了3％、1％以下,总结了防治方法。     

双季稻宽窄行与等行距机插技术产量差异性比较分析

南方双季稻因受种植模式限制,其生育期短、分蘖弱,在稀植条件下难获高产.宽窄行机插技术在插秧时,行间距实行一宽一窄,宽窄交替,可增加插秧基本苗数、改善田闰小气候.经桂林两江镇早、晚稻对比试验,结果表明,宽窄行机插技术较30 cm等行距机插技术增产10.7％.     

关于最低生活保障城乡一体化研究——以安徽省为例

目前,我国社会保障制度改革进入一个新的重要时期。围绕如何实现经济社会的全面协调可持续发展,安徽省已经开始在部分地区进行了社会救助管理城乡一体化实践。在取得了一定的积极成果的同时,也发现了漏洞和不足,尤其是城乡低保制度的失衡问题突出。进一步完善社会救助体系,推进城乡低保一体化建设,要结合区域特点,因地制宜,分阶段分步骤,逐步实现。要在探索建立城乡低保一体化架构、完善运行机制、加强过程控制、加强财政保障机制建设、城乡低保队伍建设等方面,进行改进和完善,进行全面系统的顶层设计和思考。     

稻瘟菌侵染诱导的水稻过氧羟基脂肪酸羟化环氧化酶的抗血清制备

 通过选择性抽提、盐析、阴阳离子交换柱层析等步骤从非亲和性稻瘟菌侵染的120g稻叶中获得了诱导性过氧羟基脂肪酸羟化环氧化酶(POG)的电泳纯蛋白250μg。利用这些纯化蛋白,制备了POG的抗血清。点免疫杂交结果表明,该抗血清效价大于1:5000,其抗原检测灵敏度可达0.05ng,并具有较好的特异性。蛋白印迹结果显示,稻瘟菌侵染可诱导POG在水稻细胞膜上的累积。     

泗棉3号的超高产栽培调控技术研究

本文围绕泗棉３号研究了因种高产栽培的调控技术。所获主要结果如下：泗棉３号在超高产水平下以较低的群体起点，配以科学的肥料运筹，能够调节棉株生理机能，改善叶层与叶角分布，增加光合能力，积累更多的干物质并以较大的比例分配到生殖器官中去，增加成铃数量。