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Search Results: 1 - 10 of 47168 matches for " TU Shi-Hua "
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Structure, Dielectric and Crystal Chemistry Properties of Bi1.5-xCaxZnNb1.5O7 Ceramics
WANG Hong-Ni, DING Shi-Hua, SONG Tian-Xiu, TU Wei, ZHANG Jing
无机材料学报 , 2012, DOI: 10.3724/sp.j.1077.2012.12033
Abstract: Bi1.5-xCaxZnNb1.5O7(0.00≤x≤0.50, BCZN) ceramics were prepared by solid phase reaction. The effects of Ca2+ substituting Bi3+ on the sintering properties, microstructure, dielectric and crystal chemistry properties of Bi1.5ZnNb1.5O7 based ceramics were investigated. The results revealed that when x≤0.25 mol, crystal structure of Bi1.5-xCaxZnNb1.5O7 ceramics via X-ray diffraction(XRD) was pure α-BZN phase. With the amount of Ca2+ ion increasing, the sintering temperature increased from 1000 o 1020 the density decreased from 7.011 g/cm3 to 6.353 g/cm3; and the grain size, lattice constant, resistivity all gradually decreased. For the crystal chemistry parameters, with the amount of Ca2+ ion increasing, AV(O')[Bi4], AV(O')[Bi3Zn], AV(O')[Bi2Zn2], AV(O')[Ca3Zn] all gradually increased, which coincided with the changes of lattice constant and dielectric properties.
Temporal variation of plant height,plant cover and leaf area index in intercropped area of Sichuan,China

LIN Chao-wen,CHEN Yi-bing,HUANG Jing-jing,TU Shi-hua,

生态学杂志 , 2007,
Abstract: To study the plant parameters of intercropped crops, the temporal variation of plant height, plant cover, and leaf area index in intercropped area of Sichuan was investigated in 2005. The results showed that the plant height, plant cover, and leaf area index all varied greatly with time. For corn, its maximum plant height was 177 cm, maximum plant cover was 86% occurring at flowering stage, and maximum leaf area index was 1.96. For sweet potato, its maximum and minimum plant height was 22 cm and 12 cm, respectively, maximum plant cover was 73% occurring at tuber expanding stage, and maximum leaf area index was 1.79. When intercropped with corn, all the test plant parameters of sweet potato were strongly affected by corn. In this intercropping system, the most dangerous erosion period was from the corn being harvested to the sweet potato growing up where soil surface uncovered by harvesting corn.

CHEN Yi-Bing,LIN Chao-Wen,HUANG Jing-Jing,TU Shi-Hua,

植物生态学报 , 2007,
Abstract: Aims Energy flow characteristics of alley cropping have been rarely studied,although alley cropping is common in Sichuan in order to control soil erosion and promote productivity.Our aims are to understand growth pattern and production mechanization of crops,determine effects of hedgerows on main crops in order to realize positive interactions,promote the level and structure of energy inputs,optimize and establish an environment-friendly farming system and realize sustainable agriculture on hillsides.Methods We recorded labor input,fertilizer,pesticides,farming activities and leaf fall on the soil surface in trial plots for two years.After harvesting,we separated plant parts to determine economic yield and biological yield,calculated energy of the different parts according to a conversion ratio of energy and studied energy structure and energy efficiency of alley cropping by statistical analysis.Important findings In comparison with the traditional agricultural system on hillsides,there were differences between hedgerows and crop in shape and spatial distribution of crown and roots,such that light,heat,water and soil were utilized continuously in time and in space,resulting in enhanced efficiency of light utilization,efficiency of input labor energy utilization and total output energy per unit area on steeper hillsides.Moreover,input of inorganic energy of alley cropping was reduced significantly and use of chemical fertilizer and pesticide could be reduced,resulting in environmental protection.Quantity and structure change of output and input energy of alley cropping was affected mainly by the type of hedgerow subsystem.Total energy input(including organic energy) of hedgerow system with fruit trees was increased,which was useful for improving input energy structure and ecosystem and enhancing intensive agricultural development.A hedgerow system of shrubs and herbs could reduce input labor energy,decreasing input energy and input energy consumption greatly and resulting in increased efficiency of input labor energy utilization and biomass and energy output/input ratio of the main crops.Alley cropping conserved water and soil,thereby playing an important role in agricultural reform in the vast mountainous and hilly area of Sichuan.
Effect of long-term fertilization on nitrification and nitrobacteria community in a purple paddy soil under rice-wheat rotations

GU Yun-Fu,ZHANG Xiao-Ping,TU Shi-Hua,SUN Xi-Fa,KRISTINA Lindstrm,
,张小平,涂仕华,孙锡发,Kristina Lindstrm

生态学报 , 2008,
Abstract: 采用化学分析和变性梯度凝胶电泳(DGGE)技术,从表层土壤的微生物活性及基因多样性角度研究了长期不同施肥制度对紫色水稻土硝化作用及硝化细菌群落结构的影响.结果表明,经过24a长期定位肥料试验,不同施肥处理土壤pH和硝化作用均不相同,施肥在降低土壤pH的同时会增加土壤的硝化作用;不同作物种植方式也会影响土壤pH和硝化作用,紫色水稻土旱季pH和硝化作用均大于淹水土壤.施用化肥以及化肥配施有机肥不仅可以提高土壤硝化作用,也能够改变土壤中硝化细菌的群落结构;与长期单施化肥相比,长期化肥配施农家肥不仅提高了土壤的硝化作用,而且提高了土壤硝化细菌的分子多样性.UPGMA聚类分析显示,10种不同施肥处理的聚类图也不同;在水稻收割后,M,NM,NPM与NPKM聚在一个群里,CK,N和NP聚在第二个群里,而NPK,NPKMZn和NPKMMn聚成第三个群;在小麦收割后,M,NM,NPM,N,NP和NPKMMn肥料影响下的硝化细菌群落聚成一个群,NPK,NPKMZn和NPKMMn肥下的硝化细菌聚在一起,形成第二个群, 对照(无肥)下的硝化细菌群落单独成为第三个群.应用PCR-DGGE技术可以揭示石灰性紫色水稻土上24a不同施肥及作物栽培管理措施下的硝化细菌分子群落结构特点.
Application of ASI systematic approach on Panyu banana orchard soils

LI Guo-Liang,YAO Li-Xian,FU Chang-Ying,HE Zhao-Huan,TU Shi-Hua,

中国生态农业学报 , 2008,
Abstract: The limiting factors of soil nutrient in three different banana orchard farms, Dongchong, Lingshan and Wanqingsha, in Panyu District, Guangzhou City, were identified by systematic application of indicator plant (banana) and diagnostic soil analysis (soil adsorption trial and pot experiment). Results show lack of soil N in all three banana orchards in the study area. Compared with OPT (Optimal Treatment), yield of N treatment markedly decreases by 59.7%, 46.7% and 55.1% in Dongchong, Lingshan and Wanqingsha respectively. Banana K and Mg content is low, while B is high in the Dongchong and Lingshan banana orchards. P and K are lacking in soils in Wanqingsha banana orchard. However, soil Mn content in the three banana orchard farms is sufficient.
Effects of long-term fertilization on arbuscular mycorrhizal fungi community in calcareous purple paddy soil

GU Yun-Fu,LI Fang,ZHANG Xiao-Ping,TU Shi-Hua,KRISTINA Lindstr?m,
,李芳,张小平,涂仕华,KRISTINA Lindstr?m

菌物学报 , 2012,
Abstract: To determine the influence of long term fertilization on arbuscular mycorrhizal fungi (AMF) species diversity in calcareous purplish paddy soil, rhizosphere soil samples collected from different designed plots continuously supplied with manure only (M), nitrogen fertilizer plus manure (NM), nitrogen and phosphoric fertilizer plus manure (NPM), nitrogen, phosphoric and potassium fertilizer plus manure (NPKM), mineral nitrogen (N), nitrogen-phosphoric fertilizer (NP), nitrogen and phosphoric and potassium fertilizer (NPK) and without treatment (CK), under rice-wheat rotations for 26 years were mycologically investigated. The results showed that there are 17 species of AMF, among them, 12 species belong to Glomus, accounting for 70.5 percent of the total isolated species. Three species belong to Acaulospora, accounting for 17.6 percent of the isolated species. One species belongs to Archaeospora and one species Entrophospora, accounting for 5.9 percent of isolated species. Regardless of wheat and rice, the AMF highest infection rate emerged in the control treatment (CK). Fertilizer treatments especially using phosphorus would decrease the infection rate, spore density, relative abundance and species richness of AMF. Denaturing gradient gel electrophoresis (DGGE) profiles showed that both the AMF community structure and Shannon diversity index were the highest in the soil under CK as compared with those in the soil under any other fertilizer treatments. AMF diversity index in planting plots of wheat and rice were 2.68 and 3.02, respectively. In compared with the inorganic fertilizer treatments, the combining use of manure and inorganic fertilizer increased the AMF diversity index. The results suggested that the mixing of manure and inorganic fertilizer would be more beneficial to the development of the soil AMF.
Comment on ''The scale-transformation of electromagnetic theory and its applications'', ''Distribution characteristic of scattering field for an ellipsoidal target irradiated by an electromagnetic wave from an arbitrary direction'' and ''Electric fields inside

Zhao Shi-Hua,Li Ying-Jun,

中国物理 B , 2011,
Abstract: It is shown that the 'scale-transformation' method proposed by Li Ying-Le et al. is not applicable to the Maxwell theory.
Synchronization of noise-perturbed generalized Lorenz system by sliding mode control

Kong Cui-Cui,Chen Shi-Hua,

中国物理 B , 2009,
Abstract: Synchronization of a noise-perturbed generalized Lorenz system by using sliding mode control method is investigated in this paper. Two sliding mode control methods are proposed to synchronize the noise-perturbed generalized Lorenz system. Numerical simulations are also provided for the illustration and verification of the methods.


菌物学报 , 1985,
Abstract: 水稻尾孢霉(Cercospora oryzae)是水稻条叶枯病的致病菌。24个菌株用抑制稻种胚根生长生物测定法进行产毒筛选。大部分菌株培养滤液对胚根生长有抑制作用。6个菌株:I一16,I一26,I一28,I一38,I一42和I一49选为进一步试验的菌株。添加10%稻叶汁马铃薯蔗糖培养液适于菌株的生长和产毒。生长适宜的温度和pH范围分别是25。一30℃和pH6—7,光线和通气可促进菌株生长,但温度、光线和通气对培养滤液的毒性无影响,pH6—7的培养滤液毒性最强。接种后3周的培养滤液表现强毒性。 多数菌株生长高峰出现在第4周。对水稻尾孢霉毒素进行了初步鉴定。结果表明菌株都能产生红色色素和黄色物质,红色色素经薄层色谱,可见光谱分析和颜色反应证明与尾孢霉毒素相同。培养滤液和尾孢霉毒素提取物能抑制稻种和4种作物种子胚根生长,并能在损伤稻叶上引起褪绿和枯死。这一作用与稻秧的品种抗性和秧龄无关。
Efficacy of β-adrenergic blocker plus 5-isosorbide mononitrate and endoscopic band ligation for prophylaxis of esophageal variceal rebleeding: A meta-analysis
Shi-Hua Ding, Jun Liu, Jian-Ping Wang
World Journal of Gastroenterology , 2009,
Abstract: AIM: To systematically assess the efficacy and safety of β-adrenergic blocker plus 5-isosorbide mononitrate (BB + ISMN) and endoscopic band ligation (EBL) on prophylaxis of esophageal variceal rebleeding.METHODS: Randomized controlled trials (RCTs) comparing the efficacy and safety of BB + ISMN and EBL on prophylaxis of esophageal variceal rebleeding were gathered from Medline, Embase, Cochrane Controlled Trial Registry and China Biological Medicine database between January 1980 and August 2007. Data from five trials were extracted and pooled. The analyses of the available data using the Revman 4.2 software were based on the intention-to-treat principle.RESULTS: Four RCTs met the inclusion criteria. In comparison with BB + ISMN with EBL in prophylaxis of esophageal variceal rebleeding, there was no significant difference in the rate of rebleeding [relative risk (RR), 0.79; 95% CI: 0.62-1.00; P = 0.05], bleeding-related mortality (RR, 0.76; 95% CI: 0.31-1.42; P = 0.40), overall mortality (RR, 0.81; 95% CI: 0.61-1.08; P = 0.15) and complications (RR, 1.26; 95% CI: 0.93-1.70; P = 0.13).CONCLUSION:In the prevention of esophageal variceal rebleeding, BB + ISMN are as effective as EBL. There are few complications with the two treatment modalities. Both BB + ISMN and EBL would be considered as the first-line therapy in the prevention of esophageal variceal rebleeding.
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