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Effects of elevated CO_2.on growth and carbon partitioning in rice

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chinese Science Bulletin 1998年第23期43卷 1982-1986页

作者： LIN Weihong\+1 and WANG Dali\+2.1. Department of Plant Nutrition, china agricultural University, {2. 100094, china 2. Department of Systems Ecology, Research Center for Eco_environmental Science, chinese Academy of sciences, {2. 100085, china Department of Plant Nutrition China Agricultural University Beijing China Department of Systems Ecology Research Center for Eco-Environmental Science Chinese Academy of Sciences Beijing China

Rice (\%Oryza sativa\% cv. Jindao 1187) was grown in open_top chambers which contained ambient and enriched CO\-2. CO\-2.elevation stimulated rice tillering during early vegetative stage. However, panicle dry weight per plant did not change at maturity stage. Root biomass was enhanced by high CO\-2. Root / shoot ratio was increased under high CO\-2.at maturity, indicating more carbon allocation to the below_bround part in rice under high CO\-2.

关键词： CO 2 elevation growth carbon partitioning rice (\%Oryza sativa cv\%. Jindao 1187).

Functional Analysis of the ZAG2.Promoter from Maize in Transgenic Tobaccos

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Journal of Integrative Agriculture 2012年第8期11卷 1266-1273页

作者： LU Min-hui WANG Guo-ying MENG Zheng WANG Jian-hua Plant Genetic and Breeding China Agricultural University Beijing 100193 P.R.China institute of Crop Sciecnes Chinese Academy of Agricultural Sciences Beijing 100081 P.R.China Center for Signal Transduction and Metabolomics Institute of Botany Chinese Academy of Sciences Beijing 100093 P.R.China

The function of the 3.040 bp sequence at the upstream translation starting site （ATG） of the ZAG2.gene, isolated from the maize genome, was studied. The sequence analysis showed that the sequence contained a typical class C MADS-box gene regulatory element. The 5′ UTR region of the gene contains a 1 2.9-bp intron that might have important regulatory functions. To study the sequence function, deletion derivatives of promoter-reporter （uidA） gene fusions were generated and transformed into tobaccos. The GUS staining and fluorescence quantification results showed that the GUS activity was detected only in the third and fourth whorl floral organs of the transgenic tobaccos under driving the promoter including the first intron, while detected in all the organs and was stronger under driving the promoter without the first intron. However, the GUS activity was just detected in one whorl of the fourth or third floral organs under driving of the 3.S promoter. These results suggested that the first intron of the ZAG2.gene contains functional regulatory elements, which turned out to be important for gene expression in the heterologous systems. Moreover, the GUS activity was decreased when the reporter gene driven by the promoters with 5′-deletions, respectively, from -1 606 to -951 and -951 to -42. nts, which indicates that positive regulatory elements are present in these two sequence stretches.

关键词： maize MADS-box gene ZAG2 intron

Investigation on Paste Property of chinese Bread Wheat Varieties

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agricultural sciences in{2. 2002年第1期1卷 45-49页

作者： YAN Jun, ZHANG Yong and HE Zhong-hu( institute of Crop Breeding and Cultivation , chinese Academy of {2. {3. , beijing 100081 CIMMYT china Office, C/O chinese Academy of {2. {3., beijing 100081) institute of Crop Breeding and Cultivation，chinese Academy of {2. {3.，beijing 100081 institute of Crop Breeding and Cultivation，chinese Academy of {2. {3.，beijing 100081 CIMMYT china Office，C/O chinese Academy of {2. {3.，beijing 100081

Starch viscosity is closely associated with noodle quality. RVA(rapid viscosity analyzer) was used to investigate the paste property of leading chinese wheat varieties arid 3. Australian wheat lines. Results showed that significant variability for RVA parameters was observed among chinese wheat varieties, particularly among spring wheat varieties. In general, Australia wheat lines performed better paste characters than that of chinese winter wheats. Genotype (G), {3. (E) and genotype by {3. (G×E) interaction affected all paste traits. Correlation analysis indicated that peak viscosity correlated highly and significantly with viscosity, breakdown, setback, final viscosity, peak time, and falling number(r = 0.56-0.93. P<0.01). However breakdown was not significantly associated with most paste properties. Paste characters increased from low to high latitude both in the north and south part of Yellow and Huai Valley.

关键词： T. aestivum Bread wheat Paste traits RVA Noodle quality

河北北部和内蒙古东部森林-草原交错带森林景观格局初步研究

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生态学杂志 2004年第3期23卷 11-15页

作者：王庆锁中国农业科学院农业环境与可持续发展研究所北京100081

河北北部、内蒙古东部森林草原交错带的森林景观主要有白桦林、山杨林、云杉林、蒙古栎林和榆树疏林。森林斑块的数量在森林草原交错带的森林草甸区最多 ,其次是森林带 ,再次是森林草原交错带的草甸草原区 ,草原带没有森林斑块。从... 详细信息

河北北部、内蒙古东部森林草原交错带的森林景观主要有白桦林、山杨林、云杉林、蒙古栎林和榆树疏林。森林斑块的数量在森林草原交错带的森林草甸区最多 ,其次是森林带 ,再次是森林草原交错带的草甸草原区 ,草原带没有森林斑块。从森林带到森林草原交错带 ,森林斑块变小、森林景观破碎化程度提高。森林草原交错带森林景观的形成是气候变化和现代气候、地形。

关键词：森林景观分布格局生态交错带森林-草原

Integrating MODFLOW and GIS technologies for assessing impacts of irrigation management and groundwater use in the Hetao Irrigation District,Yellow River basin

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Science china(Technological sciences) 2009年第11期52卷 3257-3263页

作者： XU Xu1,2. HUANG GuanHua1,2.& QU ZhongYi3.1 Center for Agriculture Water Research, china {3. University, {2. 100083. china 2.chinese-Israeli International Center for Research and Training in Agriculture, china {3. University, {2. 100083. china 3.Water Conservancy and Civil Engineering College, Inner Mongolia {3. University, Hohhot 010018, china 1. Center for Agriculture Water Research China Agricultural University Beijing 100083 China 2. chinese-Israeli International Center for Research and Training in Agriculture China Agricultural University Beijing 100083 China 3. Water Conservancy and Civil Engineering College Inner Mongolia Agricultural University Hohhot 010018 China

Due to severe water scarcity, water resources used in agricultural sector have been reduced markedly in Hetao irrigation district. Application of water-saving practices (WSPs) is required for the sustainable agricultural {3.. The human activities including WSPs and increase of groundwater abstraction can lower down the groundwater table, which is helpful to the salinity control. Meanwhile, an excessively large groundwater table depth may result in negative impact on crop growth and fragile ecological environment. In this paper, the Jiefangzha irrigation system in Hetao irrigation district was selected as a typical area, a groundwater flow model based on ArcInfo Geographic Information System (GIS) was developed and implemented to quantify the effect of human activities on the groundwater system in this area. The preand post-processing of model data was performed efficiently by using the available GIS tools. The time-variant data in boundary conditions was further edited in Microsoft Excel with programs of Visual Basic for Application (VBA). The model was calibrated and validated with independent data sets. Application of the model indicated that it can well describe the effect of human activities on groundwater dynamics in Jiefangzha irrigation system.

关键词： groundwater flow modeling MODFLOW GIS water-saving practices irrigation district

Advances in estimation methods of vegetation water content based on optical remote sensing techniques

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Science china(Technological sciences) 2010年第5期53卷 1159-1167页

作者： ZHANG JiaHua1,XU Yun1,YAO FengMei2.WANG PeiJuan1,GUO WenJuan1,LI Li1 & YANG LiMin3.1 chinese Academy of Meteorological sciences,{2. 100081,china 2.Graduated University of chinese Academy of sciences,{2. 100049,china 3.USGS/EROS Data Center,South Dakota 57198,USA 1. chinese Academy of Meteorological sciences Beijing 100081 China2. Graduated University of Chinese Academy of Sciences Beijing 100049 China3. USGS/EROS Data Center South Dakota 57198 USA

Quantitative estimation of vegetation water content(VWC) using optical remote sensing techniques is helpful in forest fire as-sessment,agricultural drought monitoring and crop yield *** paper reviews the research advances of VWC retrieval using spectral reflectance,spectral water index and radiative transfer model(RTM) *** also evaluates the reli-ability of VWC estimation using spectral water index from the observation data and the *** on two main definitions of VWC-the fuel moisture content(FMC) and the equivalent water thickness(EWT),the retrieval accuracies of FMC and EWT using vegetation water indices are ***,the measured information and the dataset are used to estimate VWC,the results show there are significant correlations among three kinds of vegetation water indices(i.e.,WSI,NDⅡ,NDWI1640,WI/NDVI) and canopy FMC of winter wheat(n=45).Finally,the future development directions of VWC detection based on optical remote sensing techniques are also summarized.

关键词： optical remote sensing vegetation water content estimation method water index FMC EWT radiative transfer model

A PRELIMINARY STUDY ON THE VARIATION FEATURES OF GRAIN YIELD OF china IN RECENT 40 YEARS

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Journal of Geographical sciences 1996年第2期6卷 42-49页

作者： Zhang Yu(chinese Academy of Mcteorological sciences,{2. People’s Republic of{3. ) chinese Academy Meteorological Sci Beijing 100081 China

Based on grain yield data of china, the vanation features of grain yield in china in recent 40 years and their relationships with the associated factors were analyzed. Results show that the total grain yield increased gradually, and its interannual variation is influenced principally by unit area crop yield (about 70 percent in average). The influences of {2. technology, social factors and weather conditions on thet area crop yield can be separated because of their unique variation trends and time scales. The influence of {2. technology is in a smoothly and gradually incremental trend, and the influence of the social factors is oscillated with three waves in recent 40 years, and the influence of weather conditions is fiuctuated sharply from year to year. Their mean effects on the inter-annual variation of unit area crop yield are about 3. to 40 percent, 10 to 15 percent and 50 percent respectively. In the view point of predictions, the effects of weather conditions are much more important.

关键词： crop yield agricultural technology social factors weather conditions,yield inter-annual vanation

Analysis and improving ways for water condition in winter wheat field of dryland in subhumid areas of the Loess Plateau

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Journal of environmental sciences 1998年第3期10卷 85-94页

作者： Zhong Zhaozhan, Zhao Jubao  institute of agrometeorology, {2. Academy of {3. sciences, beijing 100081,china 

Based on the soil moisture data from the locating experiments from 1986—1990, and using the water balance method, the water supply and demand state in the field of winter wheat, and the ways for improving water condition in dryland of dry subhumid area of the Loess Plateau were studied. The results suggested that a low precipitation satisfying ratio of 42.9%—58.8% appears in the growing period of winter wheat, and the yield, to a great extent depended on the water that was stored in deep soil layer in the previous rainy season. The filed trial results showed that tillage in the summer fallow period,straw cover, soil moisture regulation with adequate fertilization, crop rotation and proper cropping system could be the efficient ways for improving the water condition,and for the exploitation and utilization of natural water resources(both precipitation and soil water) in the winter wheat field of dryland. 

关键词： soil moisture water balance precipitation meet ratio dry subhumid area dryland rainfed agriculture.

Possible Energy Network with polygeneration system and CCS for china

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中国科学：技术科学英文版 2010年第1期53卷 33-39页

作者： GAO Lin1,LI Sheng1,2.JIN HongGuang1 & LIN Hu1 1 institute of Engineering Thermophysics,chinese Academy of {2.,beijing 100190,china 2.Graduate School of chinese Academy of {2.,beijing 10003.,china 1. institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China2. Graduate School of Chinese Academy of Sciences Beijing 100039 China

On basis of adopting polygeneration systems for power and alternative fuels,capturing CO2.with near zero energy penalties,and storing CO2.on sites,a new kind of Energy Network can integrate energy utilization,CO2.capture,transportation and storage ***-economic analysis of this solution focusing on Inner Mongolia and the Yangtze River Delta districts had been carried with comparison to the chain method for energy utilization and CO2.*** solution can save 2..5% of energy,and reduce 3.% of total *** adoption of advanced polygeneration systems contributes 52.2. of the total saved costs,and the integration of energy utilization and CO2.sequestration in the Energy Network contributes 47.8%.From the aspect of CCS,the CO2.sequestration cost in the Energy Network can be as low as 12.$/t due to the lower energy penalties of capture in polygeneration systems and the combination of CO2.source and *** Energy Network exhibits attractive performance on energy saving,costs reduction for CCS,which may be a promising solution for sustainable development of{2..

关键词： CO2 capture and storage Energy Network polygeneration system