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Search Results: 1 - 10 of 31462 matches for " DANG Ting-Hui "
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The effect of N ,P and variability of their use efficiency on winter wheat in the rainfed highland
旱塬冬小麦氮磷肥效及其利用率的变异性研

Dang Ting-hui,
党廷辉

中国生态农业学报 , 2000,
Abstract: 多年试验研究结果表明,氮(N)磷(P)肥对旱塬冬小麦有显著增产效果,但其随小麦品种、年度波动性很大。N、P肥利用率年际间变化很大,且随其用量的增加而降低。1984~1995年(供试品种"长武-131")N肥利用率变幅为6.4%~58.6%,变异系数为48.7%;P肥利用率变幅为3.7%~19.8%,变异系数为39.5%。1996~1998年(供试品种"长武-134")肥料用量由45kg/hm2增至180kg/hm2,N肥利用率由42.9%降至25.4%(平均36.3%),P肥利用率由10.8%降至3.2%(平均7.2%)。肥料利用率与施肥利润高低并不同步,以肥料利用率作旱塬地区肥料生产效益的度量存在很大局限性,通过分析N与P的连应效应表明,N、P配施是提高其相互利用率的有效途径。
Effects of fertilization on water use efficiency of winter wheat in arid highland
施肥对旱地冬小麦水分利用效率的影响

Dang Ting-hui,
党廷辉

中国生态农业学报 , 1999,
Abstract: 据陕西省长武县旱塬冬小麦肥料实验资料,分析了冬小麦的水肥与产量关系。结果表明,作物耗水量、水分利用效率、底墒利用率与产量关系密切;施肥方式、种类和数量均直接影响水分利用效率和底墒利用率;注重肥料配合施用,适当增施有机肥、N肥和P2O5能明显改善水分利用效率和底墒利用率。N、P2O5比例对土壤水分利用表明,N肥有利于提高水分利用效率,P2O5则有利于提高底墒利用率和增加对土壤深层水的利用.
N0_3~--N accumulation and its affecting factors in small watershed in gully region of Loess Plateau
黄土高原沟壑区小流域土壤NO3^——N的积累特征及其影响因素

GUO Sheng-li,HAO Ming-de,DANG Ting-hui,
郭胜利
,郝明德

自然资源学报 , 2003,
Abstract: 以小流域为单元,分析了黄土高原沟壑区化肥投入、土壤NO3^2--N积累及其影响因素。结果表明,化肥投入是流域土地利用结构高速的重要支撑和保证因素,而流域土地利用结构的变化进一步拉动了化肥的投入。目前施肥条件下,流域内坡地果园存在显的NO3^--N积累,其积累量高于农田土壤,应作为今后重点监测对象。农田系统中,小麦或玉米连作土壤中NO3^--N的积累量显,通过作物之间的轮作可显降低剖面中NO3^--N的深层积累。土壤NO3^--N的积累是小流域治理过程中产生的问题,与流域氮肥投入、氮肥吸收利用和土壤水分演变密切相关。
Distribution characteristic of dried soil layer in Wangdonggou Watershed in gully region of the Loess Plateau
黄土高源沟壑区流域土壤干层的分布特征

HE Fu-hong,HUANG Ming-bin,DANG Ting-hui,
何福红
,黄明斌,党廷辉

自然资源学报 , 2003,
Abstract: Dried soil layer results in soil degradation,slows down the vegetation growth rate,makes it withering,and imperils serious ecological environmental construction in northern China,especially in the gully region of the Loess Plateau.It has aroused our attention in recent years.Based on this phenomenon,dried soil layer in Wangdonggou Watershed in gully region of the Loess Plateau was studied in this paper.First,the measured indexes of dried soil layer are discussed according to the soil properties.The result shows that in Wangdonggou Watershed,the soil layer under2m with a moisture be-low14%can be regarded as dried soil layer.Second,according to the soil moisture profile and the degree of soil water conditions affect-ing vegetation growth,the dried soil layer can be divided into4grades such as non-dried,low-grade,medium-grade,and serious grade.Third,the distribution characteristics of dried soil layer in the watershed are analyzed.The result shows that dried soil layer is a general soil water phenomena in the whole watershed.In general,farm land>grass land>orchard land>forest land in the dryness degree and thickness of dried soil layer.In the same time,distribution characteristics of dried soil layer are affected by plant density,age,biomass,slope degree,slope aspect,and slope direction.Finally,some advices on vegetation construction are put forward:1)to adjust the land use structure,increase the proportion of rosebush and grassland to form a reasonable land use struc-ture;2)to develop the native tree categories to carry tree categories diversification off;3)to re-duce community density and control community productivity to assure a relative balance of water consumption and circumstance water supply;and4)in the process of vegetation regeneration and rehabilitation,the effect of ecologic niche on the distribution of soil water should be consid-ered fully to choose feasible category and keep reasonable vegetation density.
Soil organic carbon and its fractions in aggregates under different plant communities in the hill-gully region of the Loess Plateau
黄土丘陵区不同植被群落土壤团聚体 有机碳及其组分的分布

MA Rui-Ping,LIU Lei,AN Shao-Shan,DANG Ting-Hui,
马瑞萍
,刘 雷,安韶山,党廷辉

中国生态农业学报 , 2013,
Abstract: Vegetation communities have been noted to affect soil organic carbon content via the addition of outer soil organic matter that in turn contribute to the formation of soil aggregates. The fractions of organic carbon in soil aggregates under different vegetation communities (forest and steppe zones) in the hill-gully region on the Loess Plateau were studied in this paper to explore the effect of different vegetation communities on soil structure. The study showed that: (1) Total soil organic carbon content in the forest zone of the study area was higher than that in the steppe zone. The order of total organic carbon for the plant communities in the forest zone was: Quercus liaotungensis community > Robinia pseudoacacia community > Sophora viciifolia community. Also the order of total organic carbon for the plant communities in the steppe zone was: Hippophae rhamnoides community > Lespedeza davurica + Artemisia giraldii community > Artemisia sacrorum + L. davurica community. (2) The proportions of active to total organic carbon and that of humus to total organic carbon were similar under each vegetation zone. However, the proportion of active to total organic carbon was greater than that of humus to total organic carbon under each vegetation community. (3) The >0.25 mm aggregates under the forest zone was significantly higher than that under the steppe zone. The pattern of the various forms of organic matter in the soil particles suggested initial increase in organic carbon, followed by decrease or flat curve with increasing aggregate size. A large proportion of soil organic carbon existed in 2~0.25 mm and <0.25 mm aggregates. (4) Active organic carbon content was significantly spatially different under the steppe zone. Each form of organic carbon in the Q. liaotungensis community was also significantly spatially different. The <0.25 mm aggregate humus was greater than other aggregates in the Q. liaotungensis community. (5) Unlike the other vegetation communities, there was no significant difference in terms of soil organic carbon between the 0~10 cm and 10~20 cm soil layers in the H. rhamnoides community.
Effect of nitrogen-application and water-fertilizer under plastic film mulching of wheat in dryland farming
旱作冬小麦施氮肥与地膜栽培的水肥效应

DANG Ting-Hui,GUO Sheng-Li,HAO Ming-De,CAI Gui-Xin,
党廷辉
,郭胜利,郝明德,蔡贵信

中国生态农业学报 , 2002,
Abstract: 旱作冬小麦施氮与地膜栽培水肥管理试验结果表明,小麦施用氮肥在小麦生育前期连续干旱年中仍有显著增产效果,但小麦地膜栽培未表现良好的增产作用。施用氮肥有利于0-100cm土层土壤水分的保持和改善,明显提高水分生产效率,增加小麦的N素吸收,并促进小麦对P素和K素的吸收总量。地膜栽培在小麦生育前期具有较好的保墒作用,膜际与膜下栽培土壤剖面水分无明显差异,表层土壤湿度的日变化观测表明地膜具有明显的提水保墒作用。
The Role of Glucocorticoid Receptors in Dexamethasone-Induced Apoptosis of Neuroprogenitor Cells in the Hippocampus of Rat Pups
Chun-I Sze,Yung-Chieh Lin,Yuh-Jyh Lin,Ting-Hui Hsieh
Mediators of Inflammation , 2013, DOI: 10.1155/2013/628094
Abstract:
TOUCH Doctor — A Nutrition Control Service System Developed under Living Lab Methodology
Chi-Kun Eddy Lin, Ting-Hui Wang, Jar-Ferr Kevin Yang
International Journal of Automation and Smart Technology , 2012, DOI: 10.5875/ausmt.v2i3.142
Abstract: This paper presents a nutrition control service system, TOUCH Doctor, developed under living lab methodology. In addition to user-driven open innovation, the work on this project was highly interdisciplinary, including contribution from professionals in technology, communication, and medicine. The development of TOUCH Doctor not only depended on the work of engineering and medical experts, but also on the links between the product and its users and cooperating company. The final co-creative innovation, then, was realized through academic, business and industry contribution that could be applied to increase the feasibility of the human-centric service design innovations. Additionally, with collected open data, we also designed web service apps for usability tests to continually improve upon the service provided. The entire user-driven innovation procedure of the development of TOUCH Doctor services, including idea generation, concept evaluation, product development, and final product launch, is presented here in detail.
Accumulation of phenanthrene by roots of intact wheat (Triticum acstivnm L.) seedlings: passive or active uptake?
Xin-Hua Zhan, Heng-Liang Ma, Li-Xiang Zhou, Jian-Ru Liang, Ting-Hui Jiang, Guo-Hua Xu
BMC Plant Biology , 2010, DOI: 10.1186/1471-2229-10-52
Abstract: The possibility that plant roots may take up phenanthrene (PHE), a representative of PAHs, via active process was investigated using intact wheat (Triticum acstivnm L.) seedlings in a series of hydroponic experiments. The time course for PHE uptake into wheat roots grown in Hoagland solution containing 5.62 μM PHE for 36 h could be separated into two periods: a fast uptake process during the initial 2 h and a slow uptake component thereafter. Concentration-dependent PHE uptake was characterized by a smooth, saturable curve with an apparent Km of 23.7 μM and a Vmax of 208 nmol g-1 fresh weight h-1, suggesting a carrier-mediated uptake system. Competition between PHE and naphthalene for their uptake by the roots further supported the carrier-mediated uptake system. Low temperature and 2,4-dinitrophenol (DNP) could inhibit PHE uptake equally, indicating that metabolism plays a role in PHE uptake. The inhibitions by low temperature and DNP were strengthened with increasing concentration of PHE in external solution within PHE water solubility (7.3 μM). The contribution of active uptake to total absorption was almost 40% within PHE water solubility. PHE uptake by wheat roots caused an increase in external solution pH, implying that wheat roots take up PHE via a PHE/nH+ symport system.It is concluded that an active, carrier-mediated and energy-consuming influx process is involved in the uptake of PHE by plant roots.Polycyclic aromatic hydrocarbons (PAHs) are a group of organic compounds composed of two or more fused aromatic rings in linear, angular, or cluster arrangements [1]. PAHs are of particular concern because of their hydrophobic, recalcitrant, persistent, potentially carcinogenic, mutagenic and toxic properties, and their ubiquitous occurrence in the environment.Over 90% of PAHs in the environment reside in surface soil [2]. Furthermore, plants grown in PAH-contaminated soils can become contaminated with PAHs due to their absorption [3-6]. Therefore, they may pose
Pre-stress Lose Calculation and Analysis of Long Span Bridge Base on Monitoring of Strain
基于应变测量的大跨度桥梁预应力损失的计算与分析

LAO Xiao-chun,HE Ting-hui,TANG Li-qun,LIANG Ying-jing,
劳晓春
,何庭蕙,汤立群,梁颖晶

实验力学 , 2006,
Abstract: 多座桥梁施工的监控结果表明,随着预应力索长度的增大,预应力张拉后所产生的反拱与理论计算值的偏离逐渐加大,预应力损失呈非线性增长。因此,如何正确估计预应力损失产生的主要原因和预应力损失率,对设计和施工都很有意义,目前这方面的研究中定量化描述的较少。本文基于肇庆西江大桥的应变监测结果和预应力索的布置图分析,指出预应力损失的一个重要因素是预应力索的弯角,并给出了预应力损失率与预应力索弯角之间的拟合经验公式,这为工程上预应力损失的准确估算提供了一种新的参考方法。
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