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Spatiotemporal Characteristics of Reference Evapotranspiration and Its Sensitivity Coefficients to Climate Factors in Huang-Huai-Hai Plain,China

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Journal of Integrative Agriculture 2013年第12期12卷 2280-2291页

作者： YANG Jian-ying LIU Qin mei xu-rong YAN Chang-rong JU Hui xu Jian-wen Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences State Engineering Laboratory of Efficient Water Use and Disaster Reduction for Crops Ministry of Agriculture Key Laboratory of Dryland Agriculture Ministry of Agriculture Key Laboratory of Agricultural Environment Ministry of Agriculture

Climate change will have important implications in water shore regions,such as Huang-Huai-Hai（3H） plain,where expected warmer and drier conditions might augment crop water *** analysis is important in understanding the relative importance of climatic variables to the variation in reference evapotranspiration（ET 0）.In this study,the 51-yr ET 0 during winter wheat and summer maize growing season were calculated from a data set of daily climate variables in 40 meteorological *** maps for key climate variables were estimated according to Kriging method and the spatial pattern of sensitivity coefficients for these key variables was *** addition,the slopes of the linear regression lines for sensitivity coefficients were *** showed that ET 0 during winter wheat growing season accounted for the largest proportion of annual ET 0,due to its long phenological days,while ET 0 was detected to decrease significantly with the magnitude of 0.5 mm yr-1in summer maize growing *** radiation is considered to be the most sensitive and primarily controlling variable for negative trend in ET 0 for summer maize season,and higher sensitive coefficient value of ET 0 to solar radiation and temperature were detected in east part and southwest part of 3H plain *** humidity was demonstrated as the most sensitive factor for ET 0 in winter wheat growing season and declining relativity humidity also primarily controlled a negative trend in ET 0,furthermore the sensitivity coefficient to relative humidity increased from west to *** eight sensitivity centrals were all found located in Shandong *** ET 0 along with its sensitivity maps under winter wheat-summer maize rotation system can be applied to predict the agricultural water demand and will assist water resources planning and management for this region.

关键词： ET 0 spatial distribution temporal trends sensitivity coefficient 3H plain

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Distribution pattern and titer of Candidatus Liberibacter asiaticus in periwinkle(Catharanthus roseus)

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Journal of Integrative Agriculture 2018年第11期17卷 2501-2508页

作者： LI Ya xu mei-rong DAI Ze-han DENG Xiao-ling Agricultural College Guangdong Ocean University Laboratory of Citrus Huanglongbing Research/Guangdong Key Laboratory of Microbial Signals and Disease Control South China Agricultural University

Candidatus Liberibacter asiaticus （CaLas）, an uncultured Gram-negative alphaproteobacterium, is the causal agent of Huanglongbing （HLB） in citrus. CaLas resides in phloem sieve tubes and has been shown to be unequally distributed in different tissues. Although HLB is a disease of citrus plants, it has been demonstrated that periwinkle can serve as an experimental host of CaLas, which can be transmitted from citrus to periwinkle via the parasitic plant dodder （Cuscuta spp.）. To investigate the distribution of CaLas in various periwinkle tissues, the bacteria were transmitted from an infected periwinkle plant to healthy periwinkles by top-grafting. The movement of the inoculum and associated titer changes were observed over time in various tissues. CaLas could be detected in the leaves, main stems, and roots of infected periwinkle by conventional PCR, and in all three tissues a clear time-dependent change in CaLas titer was observed, with titer increasing soon after inoculation and then decreasing as disease symptoms became severe. The highest titer was found at 25, 35 and 35 days after inoculation in leaves, main stems and roots, respectively. The titer in leaves was much higher than in the main stems and roots at the same time point, and the spatial distribution of CaLas in the leaves, main stems and roots of infected periwinkle was uneven, similar to what has been shown in citrus. The results provide guidance for selecting the proper periwinkle tissues and sampling times for early detection of CaLas.

关键词： Candidatus Liberibacter asiaticus titer distribution Catharanthus roseus

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Improving Water Use Efficiency of Wheat Crop Varieties in the North China Plain: Review and Analysis

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Journal of Integrative Agriculture 2013年第7期12卷 1243-1250页

作者： mei xu-rong ZHONG Xiu-li Vadez Vincent LIU Xiao-ying Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences/State Engineering Laboratory of Efficient Water Use and Disaster Mitigation for Crops/Key Laboratory for Dryland Agriculture Ministry of Agriculture International Crop Research Institute for the Semi-Arid Tropics (ICRISAT)

The North China Plain （NCP）, one of the most important agricultural regions in China, is facing a major water-resource crisis evoked by excessive exploitation of groundwater. To reduce water use while maintaining high crop production level, improving variety water use efficiency （WUE） is an urgent need, especially because other water-saving measures such as water delivery, irrigation, and agricultural practices have already achieved most possible progresses. Evaluation of variety WUE can be performed accurately at the individual plant level （WUEp）. Reviewing the studies on physiological factors affecting WUE p performed up to date, stomatal conductance was considered to be an important trait associating closely with WUE p . The trait showed a large degree of varietal variability under well-watered conditions. Crop varieties differ highly in sensitivity of stomata to soil and air drying, with some varieties strongly reducing their stomatal conductance in contrast with those lightly regulating their stomata. As a result, difference among varieties in WUE p was enlarged under water deficit conditions in contrast with those under well-watered conditions. The relationship between stomatal conductance and yield depends on water availability of whole growing period in local areas. Usually, large stomatal conductance results in a high yield under good irrigation system, whereas a low stomatal conductance can lead to yield benefit under limited stored soil moisture conditions. In the NCP, winter wheat is the largest consumer of irrigation water, improvement strategies for high WUE aiming at wheat crops are in urgent need. We suggest, for the well-irrigated areas with excessive exploitation of groundwater, the wheat breeding program need to combine medium stomatal conductance （0.35 mmol H2O m-2 s-1 or so）, high carboxylation efficiency, and high harvest index. Areas with partial/full access to irrigation, or infrequent drought, should target wheat varieties with high stomatal

关键词： water use efficiency yield stomatal conductance water deficit

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Heavy Metal Content in Chinese Vegetable Plantation Land Soils and Related Source Analysis

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Agricultural Sciences in China 2008年第9期7卷 1115-1126页

作者： ZENG Xi-bai LI Lian-fang mei xu-rong Key Laboratory of Agro-Environment ＆ Climate Change Ministry of Agriculture/Institute of Agricultural Environment and Sustainable Development Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China

According to the previous literature published since 1989, statistical analysis for reported data on the heavy metals in Chinese vegetable plantation soils was carried out systematically in this article. The purpose of this investigation was to study the status of heavy metal content in vegetable land soils systematically through objective assessment to promote the development of vegetable production with high quality and efficiency. It is concluded that Zn, Cr, Cu had relatively high concentrations while the mean concentrations of toxic metals, As, Hg, Cd were 8.03, 0.12, 0.28 mg·kg^-1, respectively with comparatively low concentrations in Chinese vegetable land. Comparing to Clainese Soil Quality Criterion GB 15618- 1995 （6.5 〈 pH 〈 7.5）, about 24.1, 10.3, and 9.2% of the total samples was contaminated by Cd, Hg, and As, respectively, and the descending order of heavy metals was Cd 〉 Hg 〉 As 〉 Zn 〉 Cu 〉 Cr 〉 Pb. When compared among different regions, the more serious heavy metal contamination was found in the vegetable land of eastern China and the main contamination elements were Cd, Hg, and Zn. In the mid region, vegetable plantation land soil was mainly polluted by As and Cd, as well as by Hg, Zn, and Cu, to some extent. In the west region of China, Cd and As contamination was also observed to some degree, along with few soil samples exceeding the grade Ⅱ level of GB 15618-1995 （6.5 〈 pH 〈 7.5） for Cu, Cr, and Hg content. Compared to the five vegetable plantation land patterns, the highest concentration of As, Cd, Hg, and Zn occurred in the industrial/sewage irrigation vegetable land, especially for Hg with 2.36 mg·kg^-1 content averagely, which is 10.5-21.1 times higher than the other four types of vegetable lands. The highest concentration of Cn and Cr occurred in the greenhouse vegetable land soils, and urban vegetable land soil had the highest Pb content in comparison with the other types of vegetable plantation land patterns. By analyzing heavy metal conte

关键词： China vegetable land heavy metal content reason

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Water consumption in summer maize and winter wheat cropping system based on SEBAL model in Huang-Huai-Hai Plain, China

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Journal of Integrative Agriculture 2015年第10期14卷 2065-2076页

作者： YANG Jian-ying mei xu-rong HUO Zhi-guo YAN Chang-rong JU Hui ZHAO Feng-hua LIU Qin Chinese Academy of Meteorological Sciences Key Laboratory of Dryland Agriculture Ministry of Agriculture/Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences Key Laboratory of Agricultural Environment Ministry of Agriculture/Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences

Crop consumptive water use is recognized as a key element to understand regional water management performance. This study documents an attempt to apply a regional evapotranspiration model（SEBAL） and crop information for assessment of regional crop（summer maize and winter wheat） actual evapotranspiration（ET a） in Huang-Huai-Hai（3H） Plain, China. The average seasonal ET a of summer maize and winter wheat were 354.8 and 521.5 mm respectively in 3H Plain. A high-ET a belt of summer maize occurs in piedmont plain, while a low ET a area was found in the hill-irrigable land and dry land area. For winter wheat, a high-ET a area was located in the middle part of 3H Plain, including low plain-hydropenia irrigable land and dry land, hill-irrigable land and dry land, and basin-irrigable land and dry land. Spatial analysis demonstrated a linear relationship between crop ET a, normalized difference vegetation index（NDVI）, and the land surface temperature（LST）. A stronger relationship between ET a and NDVI was found in the metaphase and last phase than other crop growing phase, as indicated by higher correlation coefficient values. Additionally, higher correlation coefficients were detected between ET a and LST than that between ET a and NDVI, and this significant relationship ran through the entire crop growing season. ET a in the summer maize growing season showed a significant relationship with longitude, while ET a in the winter wheat growing season showed a significant relationship with latitude. The results of this study will serve as baseline information for water resources management of 3H Plain.

关键词： ETa winter wheat summer maize SEBAL crop information Huang-Huai-Hai Plain

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复方高滋斑片联合右佐匹克隆片治疗老年精神疾病伴睡眠障碍的疗效分析

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湖北科技学院学报（医学版） 2024年第3期38卷 238-241页

作者：吴甘霖徐美荣吴彩霞曹雨孔鑫湖北科技学院医学部临床医学院湖北咸宁437100 湖北科技学院附属第二医院精神科五病区咸宁市中心医院

目的探讨复方高滋斑片联合右佐匹克隆片治疗老年精神疾病伴睡眠障碍的疗效。方法将我科收治的72例老年患者,随机分为对照组和观察组,各36例。两组均服用右佐匹克隆片,观察组加用复方高滋斑片,疗程均为4周。治疗前、治疗4周后评定匹兹堡... 详细信息

目的探讨复方高滋斑片联合右佐匹克隆片治疗老年精神疾病伴睡眠障碍的疗效。方法将我科收治的72例老年患者,随机分为对照组和观察组,各36例。两组均服用右佐匹克隆片,观察组加用复方高滋斑片,疗程均为4周。治疗前、治疗4周后评定匹兹堡睡眠质量指数(PSOI)、失眠严重程度指数(ISI)、疲劳严重程度指数(FSS)。结果与治疗前比较,治疗4周后观察组和对照组PSQI、ISI以及FSS总分均下降,差异有统计学意义(P<0.01);治疗4周后,与对照组比较,观察组PSQI总分、ISI总分及FSS总分下降,差异有统计学意义(P<0.05)。结论在右佐匹克隆片治疗的基础上加用复方高滋斑片干预精神疾病伴睡眠障碍老年患者,可改善患者的睡眠质量。

关键词：精神疾病睡眠障碍复方高滋斑片

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Maize grain yield and water use efficiency in relation to climatic factors and plant population in northern China

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Journal of Integrative Agriculture 2021年第12期20卷 3156-3169页

作者： LIU Yue-e HOU Peng HUANG Gui-rong ZHONG Xiu-li LI Hao-ru ZHAO Jiu-ran LI Shao-kun mei xu-rong Beijing Key Laboratory of Maize DNA Fingerprinting and Molecular Breeding/Maize Research Center Beijing Academy of Agriculture&Forestry SciencesBeijing 100097P.R.China Key Laboratory of Crop Physiology and Ecology Ministry of Agriculture and Rural Affairs/lnstitute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081P.R.China Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences/Key Laboratory of Dryland Farming AgricultureMinistry of Agriculture and Rural AffairsBeijing 100081P.R.China

Water scarcity has become a limiting factor for increasing crop *** ways to improve water use efficiency(WUE)has become an urgent task for Chinese *** understand the response of different maize populations to changes in precipitation and the effects of changes in maize populations on WUE,this study conducted maize population experiments using maize hybrids with different plant types(compact and semi compact)and different planting densities at 25 locations across *** was found that,as precipitation increased across different locations,maize grain yield first increased and then decreased,while WUE decreased *** the relationship between WUE and the main climatic factors,this study found that WUE was significantly and negatively correlated with precipitation(R(daily mean precipitation)and R(accumulated precipitation))and was positively correlated with temperature(TM(daily mean maximum temperature),T_(M-m)(T_(m),daily mean minimum temperature)and GDD(growing degree days))and solar radiation(Ra(daily mean solar radiation)and Ra(accumulated solar radiation))over different growth *** differences in maize grain yield,WUE and precipitation were found at different planting *** population densities were ranked as follows according to maize grain yield and WUE based on the multi-site experiment data:60000 plants ha^(-1)(P_(2))>90000 plants ha^(-1)(P_(3))>30000 plants ha^(-1)(P_(1)).Further analysis showed that,as maize population increased,water consumption increased significantly while soil evaporation decreased *** differences were found between the WUE of ZD958(compact type)and that of LD981(semi-compact type),as well as among the WUE values at different planting *** addition,choosing the optimum hybrid and planting density increased WUE by 21.70 and 14.92%,respectively,which showed that the hybrid played a more significant role than the planting density in improving WU

关键词： maize climatic factor water utilization characteristics water use efficiency hybrids planting density

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The Connotation and Extension of Agricultural Water Resources Security

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Agricultural Sciences in China 2007年第1期6卷 11-16页

作者： LIU Bu-chun mei xu-rong LI Yu-zhong YANG You-lu Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences Beijing 100081 P.R China Graduate School Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China Managing Bureau of Irrigation Region in Wulate Hetao Inner Mongolia Bayannaoer 015000 P.R.China

The objective of this study is to define agricultural water resources security and its connotation and extension. The definitions of water security, water resources security, and water environment security were summarized, and their relationship was differentiated and analyzed. Based on these, the elements of the conception of agricultural water resources security were hashed and the conception was defined. Agricultural water resources security is the provision of water resource that ensures protection of agriculture against threat, hazards, destruction, and loss. Moreover, the connotation and extension of agricultural water resources security were ascertained. In detail, the connotation of the definition has natural attributes, socioeconomic attributes, and cultural attributes. The extensions of agricultural water resources security include both broad and narrow ones, as well as, food security, agroenvironmental security, agroeconomic security, rural society security, etc. The definition will serve as the frame of reference for developing the researches, limiting the frame of the theory, and founding a appraising system for agricultural water resources security.

关键词： security water resources water environment agriculture

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Relationship between resistin level in serum and acute coronary syndrome or stable angina pectoris

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第12期8卷 875-880页

作者： QIAO Xiao-zhi YANG Yun-mei xu Zhe-rong YANG Li-ai Department of Very Important Person the First Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310003 China

Objective： To investigate the relationship between serum resistin level and acute coronary syndrome （ACS） or stable angina pectoris （SAP）. Methods： Sixty-five patients, with coronary artery disease, were enrolled and divided into three subgroups： acute myocardial infarction （AMI）, unstable angina pectoris （UAP） and SAP, and 26 healthy people were recruited as controls in the cross-sectional study. Serum resistin levels were determined by ELISA （enzyme-linked immunosorbent assay）, and WBC （white blood cell count）, hsCRP （high sensitive C-reaction protein）, CKmax （maximum of creatinkinase）, CK-MBmax （maximum of isozyme of creatinkinase） and cTnImax （maximum of troponin） were measured by standard laboratory methods. Results： The serum resistin levels were 4 folds higher in AMI patients, 2.43 folds in UAP patients and I. 12 folds in SAP patients than in the healthy controls （P〈0.05）. The resistin levels were also significantly different between AMI [（8.16±0.79） ng/ml], UAP [（5.59±0.75） ng/ml] and SAP [（3.45±0.56） ng/ml] groups （P〈0.01）; WBC, hsCRP, CK CK-MBmax and cTnlmax were significantly increased in AMI patients over UAP and SAP patients. Spearman analysis showed that serum resistin levels were positively correlated with WBC （r=0.412, P=0.046）, hsCRP （r=0.427,p=0.037）, CK CK-MBmax and cTnImax （r=0.731, 0.678, 0.656; P〈0.01）. Conclusion： Serum resistin levels increased with inflammatory factors and myocardial impairment. The results suggest that human resistin might play an important role in the pathogenesis of atherosclerosis and AMI as an inflammatory factor.

关键词： Resistin Acute coronary syndrome (ACS) Stable angina pectoris (SAP)

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Construction of Double Right-Border Binary Vector Carrying Non-Host Gene Rxo1 Resistant to Bacterial Leaf Streak of Rice

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Rice science 2008年第3期15卷 243-246页

作者： xu mei-rong XIA Zhi-hui ZHAI Wen-xue xu Jian-long ZHOU Yong-li LI Zhi-kang National Key Facility for Crop Genetic Resources ＆ Improvement Institute of Crop Science Chinese Academy of Agricultural Sciences Beijing 100081 China Institute of Biophysics Chinese Academy of Sciences Beijing 100101 China

Rxol cloned from maize is a non-host gene resistant to bacterial leaf streak of rice. pCAMBIA1305-1 with Rxo1 was digested with Sca I and NgoM IV and the double right-border binary vector pMNDRBBin6 was digested with Hpa I and Xma I. pMNDRBBin6 carrying the gene Rxo1 was acquired by ligation of blunt-end and cohesive end. The results of PCR, restriction enzyme analysis and sequencing indicated that the Rxo1 gene had been cloned into pMNDRBBin6. This double right-border binary vector, named as pMNDRBBin6-Rxol, will play a role in breeding marker-free plants resistant to bacterial leaf streak of rice by genetic transformation.

关键词： Rxo1 gene double right-border binary vector rice bacterial leaf streak selectable marker-free plant resistance gene

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