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Effects of irrigation and weed-control methods on growth of weed and rice

International Journal of Agricultural and Biological Engineering 2014年第5期7卷 22-33页

作者： Jacob Jeremiah Towa guo xiangping Key Laboratory of High-Effective Irrigation and Drainage and Agricultural Water and Soil Environment in Southern China Ministry of EducationHohai UniversityNanjing 210098China Irrigation and Technical Services Division Ministry of AgricultureFood Security and CooperativeDar es Salaama9192Tanzania

A field experiment was conducted to study the effects of weeds control methods and an irrigation model on rice growth as well as water consumption and weed quantity in the paddy *** conventional paddy rice production,one of the most important irrigated crops,a significant amount of irrigation water is lost due to percolation and evaporation.A new irrigation model called the Rain-Catching and Controlled Irrigation(RCCI)model has been developed as a viable water-saving technology in the production of paddy *** this study the performance of the RCCI model has been analyzed under mulching,hand weeding and weedy conditions in Jiangsu Province of *** experiment was laid out in Randomized Complete Block Design(RCBD)with three replications and nine *** three replicates consisted of three water management regimes:high dry high flooding(HD-HF),high dry low flooding(HD-LF),and shallow and frequent irrigation(SF)water *** RCCI model was adopted in HD-HF and HD-LF while Flooding Irrigation(CFI)was adopted in SF as a *** nine treatments were equally divided under mulching,hand weeding and weedy *** lowest and maximum irrigation water delivery was 244.86 mm in mulching and 429.22 mm in hand weeding,respectively at *** the lowest and maximum irrigation water delivery was 300.1 mm in the mulching field and 680.72 mm under hand weeding,respectively at *** Nanjing 44 rice variety was *** was observed that weed density and dry weight were significantly influenced by the amount of irrigation water in all the mulching,hand weeding and weedy *** yield and the number of irrigations,the RCCI model produced better results than *** under RCCI was an effective method to control weeds and reduce labor *** addition,mulching decreases the use of herbicides and the risk of *** the other hand,mulching could improve yield and save water.

关键词： irrigation weed control mulching hand weeding RCCI weed population agronomy traits paddy rice

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Spatial-temporal distribution and impact factors of irrigation water use efficiency in the grain production of China

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International Journal of Agricultural and Biological Engineering 2018年第5期11卷 131-138页

作者： xiangping guo Mengyang Wu Xinchun Cao Zhenchang Wang Key Laboratory of Efficient Irrigation-Drainage and Agricultural Soil-Water Environment in Southern China of Ministry of Education Hohai UniversityNanjing 210098China College of Agricultural Engineering Hohai UniversityNanjing 210098China

The marginal water productivity(MWP)model for the real irrigation water use performance and productivity assessment,applies to the regional scale was established in this *** temporal-spatial patterns and attribution analyses of the indicator were conducted using spatial autocorrelation and path analysis *** results showed that with an average annual increase of 3.4%,the national MWP was estimated to be 0.542 kg/m,between 1998 and *** spatial autocorrelation analysis results showed the global Moran’s I inspection values(Z)were higher than the confidence level,and the provinces,municipalities and autonomous regions(PAMs)with similar MWP values showed significant *** with a high value are centered in the middle and lower streams of the Yellow River,and those regions with a lower MWP were distributed in northeastern China and south of the Yangtze *** precipitation and temperature are the major meteorological factors that determined the indicator,while extending the fertilizer and agricultural machinery input is the effective approach for improving the regional *** major grain producing areas of North and Northeast China should take measures to raise their MWP,ensure food security and the sustainable use of water resources.

关键词： water use efficiency the marginal output spatial autocorrelation path analysis food security

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延续性护理联合术后关爱护理对人工流产女性降低重复流产率的效果分析

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实用妇科内分泌电子杂志 2024年第16期11卷 104-106页

作者：彭招平郭香萍陈章凤广东省中山市东升医院妇产科广东中山528420

目的探究延续性护理联合术后关爱护理对人工流产女性降低重复流产率的效果。方法选取200例人工流产女性,根据随机数字表法分为两组,每组100例。对照组采用常规护理,观察组采用延续性护理联合术后关爱护理。比较两组重复流产率、心理状... 详细信息

目的探究延续性护理联合术后关爱护理对人工流产女性降低重复流产率的效果。方法选取200例人工流产女性,根据随机数字表法分为两组,每组100例。对照组采用常规护理,观察组采用延续性护理联合术后关爱护理。比较两组重复流产率、心理状态及生活质量。结果观察组重复流产率0%低于对照组的6.00%(P<0.05)。护理后观察组焦虑自评量表(SAS)、抑郁自评量表(SDS)评分均低于对照组(P<0.05)。护理后观察组健康状况调查简表(SF-36)评分高于对照组(P<0.05)。结论对人工流产女性实施延续性护理联合术后关爱护理可以降低重复流产率,对缓解负性情绪、提高生活质量具有积极作用。

关键词：人工流产延续性护理术后关爱护理负性情绪生活质量

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Effects of the buried straw layer on soil water and nitrogen distribution under different irrigation limits

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International Journal of Agricultural and Biological Engineering 2022年第5期15卷 141-145页

作者： Ghulam Rasool Shuxuan Zhang Feng Wu xiangping guo College of Hydrology and Water Resources Hohai UniversityNanjing 210098China College of Agricultural Science and Engineering Hohai UniversityNanjing 211106China

At present,water and fertilizer use efficiency is low in many cultivation areas in southern *** show that the buried straw layer can effectively conserve water and *** investigate the optimal irrigation upper limit above the straw barrier and its effect on soil moisture and nitrogen distribution,an indoor soil column experiment was *** treatments were designed consisting of two levels of straw layer i.e.,(with and without buried straw layer at 25 cm depth),and three irrigation water upper limits i.e.,(saturated moisture content(s),field water holding capacity(f),and 80%of field water holding capacity(0.8f)as the upper limit of irrigation).The result revealed that the buried straw layer can inhibit water infiltration and significantly increase the water storage capacity and water storage efficiency of 0-25 cm soil *** the condition of no evaporation,when the upper limit of irrigation water does not exceed the field water holding capacity,the storage efficiency of 0-25 cm soil water reaches 89%-91%after 6 ***,a buried straw layer can inhibit the deep percolation of nitrate nitrogen and increase the amount of nitrate-nitrogen in 0-25 cm *** 80%field water holding capacity irrigation upper limit combined with straw interlayer treatment had a higher nitrate-nitrogen content in the 0-25 cm soil layer than other ***,80%of field water holding capacity as the upper limit of irrigation combined with buried straw layer is the optimal strategy to conserve soil water and nitrogen in the upper soil profile.

关键词： distribution of water and nitrogen irrigation water levels infiltration water storage efficiency

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Effects of irrigation water regime, soil clay content and their combination on growth,yield,and water use efficiency of rice grown in South China

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International Journal of Agricultural and Biological Engineering 2018年第4期11卷 144-155页

作者： Yousef Alhaj Hamoud xiangping guo Zhenchang Wang Sheng Chen Ghulam Rasool Key Laboratory of High-Effective Irrigation and Drainage and Agricultural Water and Soil Environment in Southern China Ministry of EducationHohai UniversityNanjing 210098JiangsuChina Department of Soil and Land Reclamation Aleppo UniversityAleppo 1319Syria

To investigate the effect of irrigation regime,soil clay content and their combination on growth,yield,and water productivity of rice,a shelter experiment was conduct using Randomized Complete Block Design(RCBD)with a factorial arrangement of treatments with four *** regime was the main treatment investigated,set in three levels as R(30 mm-100%)(100%of saturation and 30 mm flooded),R(30 mm-90%)(90%of saturation and 30 mm flooded)and R(30 mm-70%)(70%saturation and 30 mm flooded),*** sub-treatment was soil type,set in three levels as 40%,50%and 60%clay content,*** showed that irrigation regime and soil clay content had significant effects on growth,yield and water productivity of ***,their combination showed no significant impact on panicles number,root biomass,harvest index and irrigation water *** soil clay content results in increase in growth,yield,and water productivity of *** total water consumption during R(30 mm-100%)was higher than that during R(30 mm-90%)and R(30 mm-70%)because the latter two saturation levels led to the cracking of soil and decrease of total number of *** were consistently getting more serious with the reduction in soil water content and the increase in soil clay *** in soil will preferentially become the major routes of water losses,thus water percolation during R(30 mm-70%)was higher than that during R(30 mm-90%)and R(30 mm-100%)after each irrigation *** total water use under R(30 mm-70%)exceeded the water consumption under R(30 mm-90%)due to the great amount of soil cracking as well as the excessive volume of standing water *** water consumption and grain yield,the following conclusion can be reached:(i)The reduction in water consumption was greater than the reduction in grain yield in the case of drying soil 10%below saturation before reflooding.(ii)The reduction in water consumption was less than the reduction i

关键词： irrigation regime clay content combination growth yield water productivity rice

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稻田控制排水对高邮灌区河道洪水过程的影响

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江苏水利 2024年第4期 57-61页

作者：肖洋李晨韬郭相平裴子玥河海大学水利水电学院江苏南京210098 河海大学农业工程学院江苏南京210098 苏州科技大学环境科学与工程学院江苏苏州215009

以高邮灌区为例,采用水文-水动力模型,研究稻田控制排水措施对河道洪峰流量、水位和洪水过程的影响。结果表明,雨前通过控制灌溉适当降低田间水位可减轻稻田出流峰值,随着稻田控制水位的增加,稻田径流峰值逐渐降低。通过稻田控制排水,... 详细信息

以高邮灌区为例,采用水文-水动力模型,研究稻田控制排水措施对河道洪峰流量、水位和洪水过程的影响。结果表明,雨前通过控制灌溉适当降低田间水位可减轻稻田出流峰值,随着稻田控制水位的增加,稻田径流峰值逐渐降低。通过稻田控制排水,可降低田间出口峰值流量,改变灌区河道洪水过程,降低河道洪峰流量和水位,减轻灌区内部以及附近河道的防洪压力。

关键词：稻田控制排水洪峰流量河道水位高邮灌区

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基于遗传算法和分选识别需求的频段驻留时间优化设计

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自动化应用 2024年第17期65卷 216-219页

作者：颉宏宇李侃向川云郭祥平侯官茂西南电子设备研究所四川成都610036

为有效提高信号接收系统前端截获概率并加快系统调试进度,提出了一种基于遗传算法和分选识别需求的频段驻留时间优化设计方法。该方法首先基于窗口函数模型获得前端截获概率计算公式,其次将优化频段驻留时间最大值问题抽象为约束条件下... 详细信息

为有效提高信号接收系统前端截获概率并加快系统调试进度,提出了一种基于遗传算法和分选识别需求的频段驻留时间优化设计方法。该方法首先基于窗口函数模型获得前端截获概率计算公式,其次将优化频段驻留时间最大值问题抽象为约束条件下的非线性优化问题,并基于遗传算法进行迭代优化,最后结合辐射源信号正确分选和识别需求优化频段驻留时间最小值,从而得到最优频段驻留时间范围。结果表明,该优化设计方法可实现频段驻留时间范围的最优化,在提高系统前端截获概率的同时可解决现场调试费事费力问题,加快系统调试进度,适用于实际工程应用。

关键词：前端截获概率频段驻留时间遗传算法窗口函数模型非线性优化

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Wheat Straw Burial Improves Physiological Traits, Yield and Grain Quality of Rice by Regulating Antioxidant System and Nitrogen Assimilation Enzymes under Alternate Wetting and Drying Irrigation

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Rice science 2022年第5期29卷 473-488页

作者： Yousef ALHAJ HAMOUD Hiba SHAGHALEH WANG Ruke Willy Franz GOUERTOUMBO Amar Ali ADAM HAMAD Mohamed Salah SHETEIWY WANG Zhenchang guo xiangping College of Agricultural Science and Engineering Hohai UniversityNanjing 210098China Jiangsu Provincial Key Laboratory for the Chemistry and Utilization of Agro-Forest Biomass College of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China Department of Agronomy Faculty of AgricultureMansoura UniversityMansoura 35516Egypt

Wheat straw burial has great potential to sustain rice production under alternate wetting and drying(AWD)irrigation.A field experiment was conducted with three wheat straw burial treatments,including without straw burial(NSB),with light straw burial of 300 kg/hm^(2)(LSB)and dense straw burial of 800 kg/hm^(2)(DSB),as well as three AWD regimes:alternate wetting/moderate drying(AWMD),alternate wetting/severe drying(AWSD)and alternate wetting/critical drying(AWCD).The rice growth and grain quality were higher in LSB and NSB than those in NSB under the same AWD *** AWMD×DSB treatment resulted in the highest yield,brown rice rate,milled rice rate,amylose content and protein ***,the AWCD×NSB treatment led to the lowest yield,brown rice rate,milled rice rate,amylose content and protein *** active absorption area and nitrate reductase activity of roots were higher in the AWMD×DSB treatment than those in the AWCD×NSB treatment,as the former increased organic carbon and nitrogen contents in the rhizosphere,whereas the latter reduced their *** soluble protein content and glutamine synthetase activity were greater in the AWMD×DSB treatment than those in the AWCD×NSB *** activities of superoxide dismutase and catalase were higher in the AWMD×DSB treatment compared with the AWCD×NSB treatment,leading to the amelioration of oxidative cell injury,as shown by a lower malonaldehyde *** study suggested that farmers should implement AWMD irrigation after leaving the straw residues in the field,followed by deep tillage to improve soil quality and mitigate the drought stress cycles of *** approach can improve rice growth and grain quality and alleviate the problems of disposal of straw residues and water scarcity for sustainable rice production.

关键词： antioxidant enzyme activity wheat straw burial irrigation regime nitrogen uptake Oryza sativa grain quality yield

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基于可验证自学学分管理系统比较超声医师继续教育中手机APP端与PC端需求

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中华医学超声杂志（电子版） 2024年第5期21卷 527-533页

作者：陈雪琪张莉郭乡平罗林枝晋思琦陈程赵瑞娜施敏杨筱李建初中国医学科学院、北京协和医学院、北京协和医院超声医学科 100730 北京医学教育协会 100005 中国医学科学院、北京协和医学院、北京协和医院教育处 100730 北京市第六医院功能检查科 100007

目的探讨超声医师继续教育中不同层级医院医师在不同任务中对手机APP端和PC端的需求。方法开发手机APP端+PC端相结合的可验证自学学分管理系统。收集2022年6月至2023年6月北京协和医院(三级医院)医师40名(学员组)和8名主任医师(评估师)... 详细信息

目的探讨超声医师继续教育中不同层级医院医师在不同任务中对手机APP端和PC端的需求。方法开发手机APP端+PC端相结合的可验证自学学分管理系统。收集2022年6月至2023年6月北京协和医院(三级医院)医师40名(学员组)和8名主任医师(评估师)、北京市第六医院(二级医院)医师9名(学员组)和2名主治及以上医师(评估师),通过可验证自学学分管理系统完成规定学分的学习任务提交、评估审核及问卷填报。两院间通过APP端和PC端提交差异比较采用χ^(2)检验或Fisher确切概率检验;同一医院学习任务提交APP端和PC端选择组间比较采用K-S检验。结果基于可验证自学学分管理系统,所有人员完成学分任务提交及评审工作。手机APP端操作总量602次(86%)>PC端操作的101次(14%);全部不同类型工作(学习任务提交+评估师审核+问卷填报)完成操作方面,两院医师对手机APP端和PC端的操作选择不同,差异具有统计学意义(χ^(2)=36.173,P0.05);其中发表文章、出版医学著作、病例回顾学习、科研项目及课题等学习任务提交,PC端使用率≥61%;发表医学译文、自学线上课程和学习全国继续医学教育委员会指定的资料等任务提交,APP端使用率≥75%;北京市第六医院医师完成的4个学习任务提交均由手机APP端完成,其中完成参加学术交流、自学与本专业有关的知识2个学习任务,北京协和医院使用APP端+PC端(49/35,3/16)完成,北京市第六医院选用APP端(75/0,7/0)完成,差异有统计学意义(χ^(2)=79.457,15.326,P均<0.001)。结论手机APP端+PC端相结合的可验证自学学分管理系统能满足不同层级医院医学教育自学学分认证需求,APP端受众更多。

关键词：超声医师继续医学教育学分管理系统可验证自学

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“可验证自学”继续医学教育模式下不同医院超声学科继续医学教育学习内容分析

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中华医学超声杂志（电子版） 2024年第4期21卷 414-419页

作者：张莉郭乡平罗林枝冯雷段丽丽张志凌施敏陈雪琪陈程杨筱李建初中国医学科学院北京协和医院超声医学科 100010 北京医学教育协会 100050 中国医学科学院北京协和医院教育处 100010 北京市卫生健康委员会科技教育处 100053 北京市第六医院功能检查科 100007

目的探索在“可验证自学”继续医学教育模式下,三级与二级医院的超声医师继续医学教育学习内容的差异。方法纳入2022年6月至2023年6月北京协和医院40名超声医师,以及北京市第六医院9名超声医师,分别代表三级医院及二级医院超声学科,开... 详细信息

目的探索在“可验证自学”继续医学教育模式下,三级与二级医院的超声医师继续医学教育学习内容的差异。方法纳入2022年6月至2023年6月北京协和医院40名超声医师,以及北京市第六医院9名超声医师,分别代表三级医院及二级医院超声学科,开展“可验证自学”继续医学教育课题研究。由课题组评估师对纳入医师的学习计划制定是否符合要求进行评估,并依据上报的学习内容和学分认证要求授予相应学分。比较不同医院间目标学分及实际获得学分,并分析不同医院之间学习计划构成及实际学习内容构成。结果两医院超声医师实际获得学分均可达到≥15学分的标准。北京协和医院与北京市第六医院超声医师的目标学分之间差异无统计学意义(P>0.05),北京协和医院超声医师的实际获得学分明显高于北京市第六医院[(18.8±4.6)vs(15.3±0.5),P<0.001]。北京协和医院超声医师的实际获得学分主要来源为科研相关学习内容,占比58.43%,包括“发表文章”(45.77%)和“科研项目及课题”(12.66%),而北京市第六医院科研相关目标及实际获得学分占比均为0。北京市第六医院超声医师的实际获得学分来源主要为各种形式的线上及线下自主学习。“病例回顾学习”为两医院超声医师的重要目标学分来源,但实际获得学分均明显低于目标学分(北京协和医院为0.64 vs 2.24,北京市第六医院为0 vs 3.72)。结论三级与二级医院的超声医师学分均可达标,但三级与二级医院医师在学习计划制定、学习内容构成方面均具有显著差异,提示继续医学教育模式的更新应充分考虑不同级别医院继续医学教育的需求及实际可完成情况。另外,建议在本学分授予方案的基础上,适当降低学习内容“病例回顾分析”的学分授予难度。

关键词：可验证自学继续医学教育超声

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