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Climate change and its effect on reference crop evapotranspiration in central and western Inner Mongolia during 1961-2009

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Frontiers of Earth Science 2013年第4期7卷 417-428页

作者： Di HE Yaling LIU zhihua pan Pingli AN Liwei WANG Zhiqiang DONG Jingting ZHANG Xuebiao pan Peiyi ZHAO College of Resources and Environmental Science China Agricultural University Beijing 100193 China Key Ecology and Environment Experimental Station for Field Scientific Observation in Hohhot Ministry of Agriculture Wuchuan County Hohhot 011705 China Department of Earth & Atmospheric Sciences Purdue University West Lafayette 47907 USA

Water resource is one of the major constraints to agricultural production in central and western Inner Mongolia, where are characteristic by arid and semi-arid climate. Reference crop evapotranspiration （ETo） is an important part of water cycle in agricultural ecosystem, which has a direct effect on crop growth and yield. The implications of climate change on ETo are of high importance for agriculture regarding water management and irrigation scheduling. The aim of this study was to analyze the variations in climate and its effect on ETo in central and western Inner Mongolia over the period 1961 to 2009 For this purpose, data in ten meteorological stations across study area were collected and the FAO Penman-Monteith 56 method was used. Results showed that the average temperature, maximum temperature and minimum temperature increased by 0.49~C, 0.31~C and 0.70~C per decade during 1961-2009, respectively. In comparison, the daily temperature range decreased by 0.38~C per decade. The air relative humidity, sunshine hour, and 10-m wind speed decreased generally by 0.58%, 40.11 h, and 0.35 rrds per decade, respectively. Annual mean ETo decreased significantly at a rate of 12.2 mm per decade over the periods, this was mainly due to the decrease in wind speed in the study area. The decrease in wind speed may balance the effect of the increase in air temperature on ETo. Variations in spatial distribution of ETo and its main controlling factor were also detected among ten stations. Our results suggested that spatial and temporal distribution of ETo should be considered regarding the optimization of water resource management for agriculture in central and western Inner Mongolia under foreseen climate change.

关键词： climate change reference crop evapotranspiration partial correlation analysis Inner Mongolia

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Soil physical properties,nutrients,and crop yield with two-year tillage rotations under a winter wheat-summer maize double cropping system

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International Journal of Agricultural and Biological Engineering 2022年第1期15卷 172-181页

作者： Baozhong Yin pan Liu Yongwei Cui Zhaohui Hu Xiangling Li zhihua pan Wenchao Zhen College of Resources and Environment Sciences China Agricultural UniversityBeijing 100193China College of Plant Protection Hebei Agricultural UniversityBaoding 071001HebeiChina State Key Laboratory of North China Crop Improvement and Regulation Baoding 071001HebeiChina College of Agronomy Hebei Agricultural UniversityBaoding 071001HebeiChina Academy of Agricultural Planning and Engineering Ministry of Agriculture and Rural AffairsBeijing 100125China College of Life Science Hebei Agricultural UniversityBaoding 071001HebeiChina Hebei Normal University of Science and Technology Qinhuangdao 066000HebeiChina Key Laboratory of Crop Growth Regulation of Hebei Province Baoding 071001HebeiChina

Winter wheat and summer maize were planted from 2015-2017 to study the effects of different rotational tillage patterns on soil physicochemical properties,crop yield,water content,and fertilizer *** tillage treatments were designed as wheat subsoiling-maize no tillage(WS-MN),wheat rotary tillage-maize subsoiling(WR-MS),wheat subsoiling-maize subsoiling(WS-MS),and conventional wheat rotary tillage-maize no tillage(WR-MN)as a *** the four treatments,WS-MN and WR-MS were single-season subsoiling treatments,and WS-MS was a two-season subsoiling *** average soil bulk density decreased by 7.6%in the single-and double-season subsoiling groups compared to the WR-MN group,and the total porosity and noncapillary porosity increased by 10.7%and 12.2%,***-or double-season subsoiling treatment was not conducive to water storage in the 0-20 cm soil layer but increased the water content of the 20-140 cm soil layer,and the average soil water content of the 0-140 cm layer was increased by 11.6%in the two-growing season treatment groups compared with the WR-MN *** WS-MS and WS-MN groups compared with the WR-MN group,the soil ammonium nitrogen content was increased by an average of 18.6%in 0-20 cm soil and 16.8%in 20-100 cm soil;soil nitrate-nitrogen content was decreased by 13.5%in 0-100 cm soil;total organic carbon and microbial carbon contents in the 15-30 cm soil were increased by 18.1%and 12.7%,respectively;and soil urease,catalase,and alkaline phosphatase activities were increased by 46.1%,15.2%,and 23.1%,*** crop yield and water use efficiency increased by 8.9%and 15.0%,respectively,in both the single-and double-season subsoiling treatment *** study demonstrated the advantages of subsoiling tillage and suggested that it is suitable for crop cultivation in the Haihe Plain,China.

关键词： tillage rotations wheat-maize double cropping soil properties utilization of water and fertilizer crop yield

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Comparison of the Impacts of Climate Change on Potential Productivity of Different Staple Crops in the Agro-Pastoral Ecotone of North China

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Journal of Meteorological Research 2016年第6期30卷 983-997页

作者： TANG Jianzhao WANG Jing HE Di HUANG Mingxia pan zhihua pan Xuebiao College of Resources and Environmental Sciences China Agricultural University

The aim of this study is to compare the impacts of climate change on the potential productivity and potential productivity gaps of sunflower （Helianthus annuus）, potato （Solanurn tuberosurn）, and spring wheat （Triticumaestivurn Linn） in the agro-pastoral ecotone （APE） of North China. A crop growth dynamics statistical method was used to calculate the potential productivity affected by light, temperature, precipitation, and soil fertility. The growing season average temperature increased by 0.47, 0.48, and 0.52℃ per decade （p 〈 0.05） for sunflower, potato, and spring wheat, respectively, from 1981 to 2010. Meanwhile, the growing season solar radiation showed a decreasing trend （p 〈 0.05） and the growing season precipitation changed non-significantly across APE. The light-temperature potential productivity increased by 4.48% per decade for sunflower but decreased by 1.58% and 0.59% per decade for potato and spring wheat. The climate soil potential productivity reached only 31.20%, 27.79%, and 20.62% of the light-emperature potential produc- tivity for sunflower, potato, and spring wheat, respectively. The gaps between the light-temperature and climate-soil potential productivity increased by 6.41%, 0.97%, and 1.29% per decade for sunflower, potato, and spring wheat, respectively. The increasing suitability of the climate for sunflower suggested that the sown area of sunflower should be increased compared with potato and spring wheat in APE under future climate warming.

关键词： crop potential productivity climate warming sunflower potato spring wheat soil fertility

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Asymmetric Ridge–Furrow and Film Cover Improves Plant Morphological Traits and Light Utilization in Rain-Fed Maize

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Journal of Meteorological Research 2018年第5期32卷 829-838页

作者： Wanlin DONG Hang YU Lizhen ZHANG Ruonan WANG Qi WANG Qingwu XUE zhihua pan Zhigang SUN Xuebiao pan Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Agricultural Meteorological Department College of Resources and Environmental SciencesChina Agricultural University China Meteorological Administration Training Centre Beijing 100081China College of Resources and Environment University of Chinese Academy of SciencesBeijing 1O0190China Wuchuan Scientific and Observing Experimental Station of Agro-Environment Ministry of Agriculture and Rural Affairs Hohhot 011700China Yushu Meteorological Service of Jilin Province Changchun 130061China Texas A&MAgriLife Research and Extension AmarilloTexas 79106-1769USA

Light is one of the most important natural resources for plant growth. Light interception （LI） and use efficiency （LUE） are often affected by the structure of canopy caused by growing pattern and agronomy managements. Agro-nomy practices, such as the ridge-furrow system and plastic film cover, might affect the leaf morphology and then light transmission within the canopy, thus change light extinction coefficient （k）, and LI and LUE. The objective of this study is to quantify LI and LUE in rain-fed maize （Zea Mays L.）, a major cropping system in Northeast China, under different combinations of ridge-furrow and film covering ratios. The tested ridge-furrow system （DRF：＂double ridges and furrows＂） was asymmetric and alternated with wide ridge （0.70 m in width and 0.15 m in height）, narrow furrow （0.10 m）, narrow ridge （0.40 m in width and 0.20 m in height）, and narrow furrow （0.10 m）. Field ex-periments were conducted in 2013 and 2014 in Jilin Province, Northeast China. Four treatments were tested： no ridges and plastic film cover （control, NRF）, ridges without film cover （DRF0）, ridges with 58% film cover （DRF58）, and ridges with 100% film cover （DRFl00）. DRF0 significantly increased LI by 9% compared with NRF, while film cover showed a marginal improvement. Specific leaf area in DRF experiments with film cover was significantly lower than in NRF, and leaf angle was 16% higher than in NRF, resulting in a 4% reduction in k. LUE of maize was not increased by DRF0, but was significantly enhanced by covering film in other DRF experiments, especially by 22% in DRF100. The increase of LUE by film cover was due to a greater biomass production and a lower assimilation portioning to vegetative organs, which caused a higher harvest index. The results could help farmers to optimize maize managements, especially in the region with decreased solar radiation under climate change.

关键词： light interception light use efficiency film mulching plant morphology ridge and furrow cultivation

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Evaluation of Climatic Comfort of Living Environment based on Age Differentials in Beijing-Tianjin-Hebei Area

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Ecosystem Health and Sustainability 2020年第1期6卷 252-263,251页

作者： Siyu Liu Buju Long zhihua pan Fei Lun Yu Song Weiying Yuan Na Huang Ziyuan Zhang Shangqian Ma Department of Meteorology College of Resources and Environmental SciencesChina Agricultural UniversityBeijingChina Department of Land Resources Management College of Land Science and TechnologyChina Agricultural UniversityBeijingChina

Somatosensory comfort is mainly determined by the Temperature and Humidity Index(THI)with Wind Efficiency Index(WEI),but this conventional usage of these indicators does not capture the age-related *** we resolved this gap with a modification of the climatic comfort definition and method in a national standard,denoted as the Relative Climate Sensitive Index(RCSI),which incorporated the age-related vulnerability scores determined through online questionnaires with a scoring method,for each of the age-related and adaptive climatic comfort responses to changes in residence with Beijing-Tianjin-Hebei(BTH)region as an ***,the result showed that the human comfort of living environment decreased with age in the BTH region,implicating age obviously impacted comfort,and weak adaptability made the elderly the relatively most high-risk group-their suitable region was less than a quarter of the whole study *** the adverse effects of persistent hot weather on comfort,indicating global warming as the leading driver of dwindling comfort over recent *** the warming was more significant in the southeastern part,all these forces combined had there a hotspot,appealing for extra *** this improved evaluation accorded with actual situation to captured high-risk groups with their distributions.

关键词： Global climate change climatic comfort vulnerable population the Beijing-Tianjin-Hebei Region

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利用细鳞片石墨制备膨胀石墨的研究

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新型炭材料 2002年第2期17卷 13-18页

作者：刘国钦闫珉攀枝花学院理学系四川攀枝花617000

采用化学方法制备了细鳞片膨胀石墨 ,并对其最佳工艺条件进行了探讨。结果表明 :将 10 0目～ 16 0目的细鳞片石墨置于硫酸∶硝酸 =5 .0～ 7.5∶1.0的主酸化液中酸化 ,并分步加入 6W/%～ 7W/%的强氧化剂(KMnO4) ,6W/%的插入剂 (FeCl3 )... 详细信息

采用化学方法制备了细鳞片膨胀石墨 ,并对其最佳工艺条件进行了探讨。结果表明 :将 10 0目～ 16 0目的细鳞片石墨置于硫酸∶硝酸 =5 .0～ 7.5∶1.0的主酸化液中酸化 ,并分步加入 6W/%～ 7W/%的强氧化剂(KMnO4) ,6W/%的插入剂 (FeCl3 )继续搅拌 2h以上 ,经水洗至pH =5～ 7,烘干后在 90 0℃～ 10 0 0℃的高温下膨胀 ,可制得膨胀倍数为 180倍～ 2 0 0倍 ,松装密度在 0 .0 12 5g/mL ,灰分为 2 .0 6 3W/%～ 2 .4 70W/% ,硫分为 0 .2 13W/%～ 0 .2 33W/% ,挥发分为 4 .5W/%～ 8.5W/%的优质膨胀石墨。与已有的方法相比 ,所使用硝酸的比例降低了 30%～ 6 0 % ,且一次性完成酸化处理。

关键词：细鳞片石墨制备膨胀石墨研究化学方法氧化

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An operational satellite remote sensing system for ocean fishery

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Acta Oceanologica Sinica 2004年第3期23卷 427-436页

作者： MAOzhihua ZHUQiankun panDelu SecondInstituteofOceanography StateOceanicAdministrationHangzhou310012China KeyLaboratoryofOceanDynamicProcessesandSatelliteOceanographyofStateOceanicAdministration Hangzhou310012China

Ocean environmental information is very important to supporting the fishermen in fishing and satellite remote sensing technology can provide it in large scale and in near real-time. Ocean fishery locations are always far away beyond the coverage of the satellite data received by a land-based satellite receiving station. A nice idea is to install the satellite ground station on a fishing boat. When the boat moves to a fishery location, the station can receive the satellite data to cover the fishery areas. One satellite remote sensing system was once installed in a fishing boat and served fishing in the North Pacific fishery areas when the boat stayed there. The system can provide some oceanic environmental charts such as sea surface temperature (SST) and relevant derived products which are in most popular use in fishery industry. The accuracy of SST is the most important and affects the performance of the operational system, which is found to be dissatisfactory. Many factors affect the accuracy of SST and it is difficult to increase the accuracy by SST retrieval algorithms and clouds detection technology. A new technology of temperature error control is developed to detect the abnormity of satellite-measured SST. The performance of the technology is evaluated to change the temperature bias from -3.04 to 0.05 ℃ and the root mean square (RMS) from 5.71 to 1.75℃. It is suitable for employing in an operational satellite-measured SST system and improves the performance of the system in fishery applications. The system has been running for 3 a and proved to be very useful in fishing. It can help to locate the candidates of the fishery areas and monitor the typhoon which is very dangerous to the safety of fishing boats.

关键词： fishery oceanography charts satellite remote sensing sea surface temperature temperature error control technology

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Effects of the Evolution of Farming System on Soil Qualityin the Northern Agro-grazing Ecotone of Yinshan Mountains

Effects of the Evolution of Farming System on Soil Qualityin...

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荒漠化控制科学技术国际大会

作者： Gong Cheng An Pingli pan zhihua Qi He Zheng Dawei Liu Hui College of Resources and Environmental China Agricultural University

The historical evolution of farming system in the northern agro-grazing ecotone of Yinshan Mountains could be divided into four stages,*** system,fallow system,rotation system,and intensive farming *** farming system had different effect on soil *** paper showed that the evolution of farming system had a significant influence on soil organic matter and total nitrogen,and had little influence on soil available K and available *** soil was easy to degrade due to the fragile soil environment and difficult to *** the human interfered more,the organic matter,total nitrogen and soil quality *** a steady investment,rotation system had more influence on soil environment,especially on soil organic matter and total nitrogen than fallow system and abandoned system.

关键词： Northern agro-grazing ecotone of Yinshan Mountains Evolution of farming system Soil quality Method of replacing time with space

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Proper holomorphic self-maps of smooth bounded Reinhardt domains in C^2

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Science China Mathematics 2008年第1期51卷 93-100页

作者： CHEN zhihua~1 & pan YiFei~(2,3+) 1 Department of Mathematics, Tongji University, Shanghai 200092, China 2 Department of Mathematical Sciences, Indiana University-Purdue University Fort Wayne, Fort Wayne, IN 46805-1499, USA 3 School of Mathematics and Information Sciences, Jiangxi Normal University, Nanchang 330022, China Department of Mathematics Tongji University Shanghai China Department of Mathematical Sciences Indiana University-Purdue University Fort Wayne Fort Wayne USA School of Mathematics and Information Sciences Jiangxi Normal University Nanchang China

It is proved that every proper holomorphic self-map of a smooth bounded Reinhardt domain in C^2 is an automorphism.

关键词： Reinhardt domain proper holomorphic maps

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基于角色理论的顾客参与对顾客满意的影响机制研究

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管理学报 2018年第12期15卷 1830-1837页

作者：张广玲潘志华武汉大学经济与管理学院

基于角色理论视角,采用结构方程模型和间接效应,分析探究顾客参与对顾客满意的影响效应和机制。通过对520位消费者的问卷调查,研究结果表明,顾客参与对顾客满意存在间接的负面影响效应。顾客参与会导致顾客出现角色压力,包括角色模糊、... 详细信息

基于角色理论视角,采用结构方程模型和间接效应,分析探究顾客参与对顾客满意的影响效应和机制。通过对520位消费者的问卷调查,研究结果表明,顾客参与对顾客满意存在间接的负面影响效应。顾客参与会导致顾客出现角色压力,包括角色模糊、冲突和超荷等感受;顾客角色压力会进一步增加顾客倦怠感,即顾客参与通过角色压力的间接作用影响顾客倦怠;顾客倦怠会减弱顾客的满意度,即顾客角色压力和顾客倦怠在顾客参与和顾客满意的关系中产生连续中介作用。

关键词：顾客参与角色压力顾客倦怠顾客满意

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