Agronomic traits of soybean cultivars released in different decades after grafting record‐yield cultivar as rootstock

Breeders have seldom considered the selection for root traits during the genetic improvement in soybean. It is hypothesized that grain yield would be increased by the root function improvement, especially for the current cultivars. The objective of this grafting experiment was to determine the effect of record‐yield cultivars L14 or Z35 as rootstocks on agronomic traits of cultivars released in different decades. A total of 11 cultivars, released in different decades, were used to graft onto L14 or Z35 rootstocks. The agronomic traits were measured in the pot‐culture experiments. Grafting cultivars released in different decades onto L14 or Z35 rootstocks resulted in higher yield, 100‐seed mass and apparent harvest index as compared with those of non‐grafted or self‐grafted plants. Grain yield gain of cultivars grafted onto record‐yield cultivar rootstocks was 0.40 g/plant/year from 1966 to 2006, which was larger than that of non‐grafts and self‐grafts (0.27 g/plant/year). The yield of current cultivars should increase more if their root functions were improved.     

MBR运行特性对比研究

本文作者在实验室里对 2种型式MBR的运行特性进行了分析、对比研究 ,并且得出了结论     

Heterophase Synthesis of Humic Substances at Low Substrate Concentrations and Flow-Through Conditions

Eurasian Soil Science - Humic substances (HS) are heterogeneous and polydisperse compounds formed in soils, sediments and waters during the decay and transformation of organic residues (the process...     

TDP穴区照射调整奶牛分娩前后血液流变性的研究

 健康妊娠奶牛20头随机分为照射组和对照组各10头。照射组奶牛分别于分娩前10～3d和产后1～3d,用TDP辐射仪交替照射百会和后海穴区,每天1次,60min。奶牛分别于分娩前20、15、10、5、3、1d,1～4h和产后1～4h、1、3、15d,颈静脉采血样。检测血样的ηb80s-1,ηb20s-1,ηp,PCV,ηr,RI,AI和血浆的Glu,TP,FG的含量。与对照组比较,结果:TDP穴区照射对奶牛分娩前和后一定时期内的ηb80s-1,ηb20s-1和ηp具有一定调整作用;调整和改善分娩过程中的血糖含量和血液的流动性与变形性,减少血液丢失等,从而提高机体分娩应激反应综合适应能力。其作用机理可能是TDP辐射红外热能的经、穴感应调整作用和机体产生的生物能量效应等的综合。     

粗鞘双条杉天牛初期幼虫空间分布的研究

采用聚集度指标、频次比较和回归分析法对粗鞘双条杉天牛初期幼虫的空间分布进行研究，结果表明。粗鞘双条杉天牛初期幼虫的分布图式均为聚集分布；空间分布型为具公共Ｋ值和负二项分布。     

牡丹花色性状的研究进展

牡丹作为一种兼具观赏和药用价值的花卉,其花色具有表型性状多、花色形成的基础物质多、形成机理复杂等特点。为了给今后的牡丹花色的未来研究提供借鉴,通过查询资料文献,对近年国内外有关牡丹花色的研究文献进行了梳理,综述了牡丹的花色分类、影响花色形成的物质基础和分子基础。     

轻轨(地下段)振动环境影响分析及应用实例

指出了振动环境影响评价是城市轨道交通建设项目环境影响评价的重点评价专题,剖析了轻轨(地下段)振动环境影响评价重点值得关注的几个问题,结合实例进一步探讨了城市快速轨道交通对环境振动产生的影响,为污染防治提供依据。     

高速公路建设造成的水土流失影响及减缓措施

指出了公路工程项目属于建设性项目,穿越地形地貌复杂多样,扰动地表程度及形式复杂多变,对沿线水土流失影响较大。以高速公路环境影响评价为例,对公路建设造成的水土流失影响进行了分析和阐述,提出了可采取的减缓措施。     

长春市大气环境质量分析及污染防治对策探讨

以长春市2015~2017年大气环境监测数据为依据,对大气环境质量状况及变化趋势进行了分析。针对长春市煤烟型污染、秸秆露天焚烧污染、重点工业企业污染、机动车排放污染和城市扬尘污染等问题提出了防治措施。以加快秸秆综合利用项目的开展,同时大力推广散煤清洁化治理工作,对改善长春市大气质量具有重要意义。     

Interaction of naphthalene and naphthol with soil organic matrix

The sorption of naphthalene and naphthol from water solutions by peat, chernozem, and humic and fulvic acids was studied. The sorption isotherms of naphthalene and naphthol by chernozem corresponded to the Langmuir isotherms. More complex nonlinear isotherms were obtained for peat. Binding of naphthalene and naphthol by humic and fulvic acids can proceed through hydrophobic interactions with aromatic fragments of humic substances and hydrogen bonds between the polar groups of humic molecules and naphthol OH groups.