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Effect of Rural Sewage Irrigation Regime on Water-Nitrogen Utilization and Crop Growth of Paddy Rice in Southern China

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Phyton-International Journal of Experimental Botany 2023年第4期92卷 1215-1233页

作者： menghua xiao Yuanyuan Li Shizong Zheng Zhejiang Institute of Hydraulics and Estuary(Zhejiang Institute of Marine Planning and Design) Hangzhou310020China North China University of Water Resource and Electric Power Zhengzhou450045China

Reclaimed water irrigation has become an effective mean to alleviate the contradiction between water availability and its consumption *** this study,three types of irrigation water sources(rural sewage’s primary treated water R1 and secondary treated water R2,and river water R3)meeting the requirements of water quality for farmland irrigation were selected,and three types of irrigation water levels(low water levelW1 of 0–80 mm,medium water level W2 of 0–100 mm,and high water level W3 of 0–150 mm)were adopted to carry out research on the influence mechanismS of different irrigation water sources and water levels on water and nitrogen use and crop growth in paddy *** water quantity indicators(irrigation times and irrigation volume),soil ammonium nitrogen(NH4+-N)and nitrate nitrogen(NO3−-N),rice yield indicators(thousand-grain weight,the number of grains per spike,and the number of effective spikes),and quality indicators(the amount of protein,amylose,vitamin C,nitrate and nitrite content)of rice were *** results showed that,the average irrigation volume under W3 was 2.4 and 1.9 times of that under W1 and W2,*** with R3,the peak consumption of rice was lagged behind under R1 and R2,and the nitrogen form in 0–40 cm soil layers under rural sewage irrigation was mainly NH4+-*** changes of NO3−-N and NH4+-N in the 0–40 cm soil layer showed the trend of declining and then *** water level control only had a significant effect on the change of NO3−-N in the 60–80 cm soil *** irrigation water use efficiency and crop water use efficiency were gradually reduced with the increase of field water level *** nitrogen utilization efficiency under rural sewage irrigation was significantly higher than that under *** with the R3,rural sewage irrigation could significantly increase the yield of rice,and as the field water level rose,the effect of yield promotion was more *** was noteworthy that the grain

关键词： Reclaimed water irrigation water level control water use efficiency nitrogen utilization crop quality

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Mechanism of water savings and pollution reduction in paddy fields of three typical areas in southern China

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International Journal of Agricultural and Biological Engineering 2022年第1期15卷 199-207页

作者： menghua xiao Yuanyuan Li Yi Jia Jianwen Wang Zhejiang Institute of Hydraulics and Estuary(Zhejiang Institute of Marine Planning and Design) Hangzhou 310020China North China University of Water Resource and Electric Power Zhengzhou 450045China Zhejiang Rural Water Conservancy Management Center Hangzhou 310009China Qiantang River Irrigation Area Management Center Xiaoshan DistrictHangzhou CityHangzhou 311200China

Field irrigation and drainage regulation and fertilization application could affect water utilization and pollution transportation in a paddy *** this study,representative rice-producing areas of Zhejiang Province in southern China were selected to study the effects of different field water level control(conventional irrigation and drainage W0,controlled irrigation and drainage W1 and W2)and different fertilization methods(2 times of fertilization F2 and three times of fertilization F3)on water irrigation quantity and consumption of rice,rice growth,water utilization,and pollution *** showed that field water level control had a great effect on irrigation quota in growing period rather than that in soaking period,and irrigation quota for W0 was 37.0%-71.7%higher than that for W1 and W2 in the whole growth period of *** the upper limit of rain storage was greatly increased by W1 and W2,on the contrary,the yield under W1 and W2 was 0.4%-2.1%higher than that under *** consumption,water leakage,and evapotranspiration were 16.63%-34.4%,39.97%-60.8%,and 9.40%-31.53%lower under W1 and W2 than those under W0,respectively,while it showed no significant changes under W1 and *** use rate and WUEI(water use efficiency of irrigation)under W1 and W2 had been significantly improved by 8.20%-129.58%and 31.58%-201.61%compared to *** contribution of nitrogen and phosphorus loss from surface water accounted for 90%and the total pollution load of total nitrogen(TN),NO_(3)^(-)-N,NH_(4)^(+)-N and chemical oxygen demand(COD)were 20.0%-63.4%,21.8%-66.3%,21.5%-63.8%,and 21.4%-46.5%lower for W1 and W2 than that for W0,***,compared to F2,dispersed fertilization(F3)was beneficial to increase the yield and decrease pollutant ***,the path of IRA→NH_(4)^(+)-N→COD and IRA→WCA→WUE_(I) presented partial remediation effect,and the effect size was 23.6%and 38.1%,respectively,the path of IRA→WUE_(I)→WUE_(ET) presented a full r

关键词： controlled irrigation and drainage water consumption water use efficiency non-point source pollution structural equation mode

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Effects of rural domestic sewage reclaimed irrigation and regulation on heavy metals,PPCPs,water and nitrogen utilization,and microbial diversity in paddy field

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International Journal of Agricultural and Biological Engineering 2023年第4期16卷 245-256页

作者： Shizong Zheng menghua xiao Lei Wang Yuanyuan Li Wanchuan xiao Dan Xu Jiafang Cai Rural Water Conservancy Research Institute Zhejiang Institute of Hydraulics and EstuaryHangzhou 310020China Zhejiang Institute of Marine Planning and Design Hangzhou 310020China School of Water Conservancy North China University of Water Resource and Electric PowerZhengzhou 450045China

Rural domestic reclaimed water(RDRW)is rural domestic sewage that being safely treated,the irrigation and reuse of RDRW are an effective way to alleviate the contradiction between supply and demand of water resources in South *** this study,four kinds of irrigation water sources(primary and secondary treated water R1 and R2,purified water R3 and river water CK)and three kinds of water level regulations(low,medium,and high field water level control of W1,W2 and W3)were set to study the impact of RDRW on soil and crop safety,water and nitrogen utilization and biodiversity for establishing the regulation mechanism of RDRW irrigation with field experiment,and monitoring was carried out in RDRW irrigation demonstration area to assess the effectiveness of *** results showed that,under RDRW irrigation,the contents of Cd and Pb increased slightly,while the contents of Cr,Cu and Zn decreased in paddy *** heavy metals content decreased along the direction of stem,leaf and grain in rice plants,but did not increase significantly in rice *** the increase of field water level,pharmaceutical and personal care products(PPCPs)content in 60-80 cm soil layer was accumulated,and the PPCPs content in rice husks was higher than that in grains,but it was at a very low *** to CK,RDRW irrigation can effectively increase rice yield,rainwater use efficiency(RUE)and nitrogen use efficiency(NUE)by 5.4%-7.6%,6.7%-9.4%and 21.7%-24.2%,respectively,and the species diversity,community diversity and richness in rice fields were ***,water level regulation of W3 with R2 water resource irrigation was conducive to the exertion of comprehensive *** monitoring of demonstration area showed that the consumption of fresh water was reduced by 530 mm,yield was increased by 9.6%,and the soil and crop were both ***-term irrigation of RDRW did not cause soil and crops pollution,however,it is still necessary to track and monitor the effect of the

关键词： reclaimed water irrigation heavy metals pharmaceutical and personal care products water and nitrogen use efficiency soil microbial diversity technique for order preference by similarity to an ideal solution

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普通稠油降黏复合驱技术研究与矿场试验

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特种油气藏 2024年第1期31卷 94-100页

作者：赵林郝丽娜于春生张勇肖梦华柴细琼姚江龚恒圆中国石化河南油田分公司河南南阳473132 西南石油大学四川成都610500

针对普通稠油油藏水驱采收率低且热采成本高、碳排放量大的问题,基于春光油田低温高盐储层的流体性质,优选了阴离子型降黏剂和耐盐聚合物,通过室内物理模拟实验,明确了热水驱、单一降黏剂驱、复合驱的降水增油机理;建立了降黏复合驱反... 详细信息

针对普通稠油油藏水驱采收率低且热采成本高、碳排放量大的问题,基于春光油田低温高盐储层的流体性质,优选了阴离子型降黏剂和耐盐聚合物,通过室内物理模拟实验,明确了热水驱、单一降黏剂驱、复合驱的降水增油机理;建立了降黏复合驱反应动力学方程,在CMG-STARS软件中开发了降黏复合驱数值模拟方法,并优化了春2单元普通稠油降黏复合驱井网、井距及注采方案。研究结果表明:降黏复合驱可以充分发挥驱替相增黏、被驱替相降黏的加和效应,具有体系用量少、碳排放低、提高采收率幅度大等优势;降黏复合驱适合五点法井网,注采井距应小于200 m,在增稠剂质量分数为0.25%、降黏剂质量分数为0.20%的条件下,最佳注入段塞量为0.5倍孔隙体积,注采比为1.05。矿场实践表明,特高含水后期(含水率96.0%)的油井实施降黏复合驱,含水率降幅达30%以上,日增油5 t/d。研究证实了该项技术矿场应用的可行性,可为改善普通稠油开发效果、实现工业减排提供借鉴。

关键词：普通稠油复合驱数值模拟提高采收率春光油田

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Mechanism of Photothermal Energy on the Growth and Yield of Rice under Water Level Regulation

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Phyton-International Journal of Experimental Botany 2021年第4期90卷 1131-1146页

作者： menghua xiao Yuanyuan Li Zhejiang Institute of Hydraulics and Estuary Hangzhou310020China North China University of Water Resource and Electric Power Zhengzhou450045China

The flooding caused by heavy rainfall in rice irrigation area and the drought caused by the drop of groundwater level are the research focus in the field of irrigation and *** on the comparative experiment and farmland water level control technology,this paper studied the average soil temperature under different soil layers(TM),the daily temperature change(TDC),the photosynthetic accumulation of single leaf and canopy in rice,and response of photothermal energy to rice root characteristics and growth factors in the paddy field under drought *** results showed that the peak soil temperature under drought treatment was basically synchronous with the conventional irrigation,and the it was delayed by 2–6 h under flooding treatment compared to the drought *** different water gradients,the temperature decreased according to T_(L)>T_(CK)>T_(H)(L,H and CK represented water flooding,drought and control treatments),and the TDC was *** addition to milky stage,the daily photosynthetic(Pn)accumulation of single leaf and canopy in the flooding and drought treated paddy fields were lower than conventional irrigation,and had a negative impact on leaf area index(LAI)and yield(YR),but did not form fatal *** root characteristic factors,RL(root length),RW(root weight),R-CR(root-canopy ratio)were promoted with drought,and YR under light drought was slightly higher than that under heavy *** was a strong positive correlation between TM and R-CR in all rice growth stages,while TDC-5 was negatively correlated with effective panicle number,TDC and R-CR in 20 cm soil layer were positively *** correlation between daily Pn accumulation and YR was low,and the correlation between Pn and YR factors was negative or weak positive or *** total Pn was positively correlated with yield factors,and the correlation coefficient was higher than that of daily Pn.

关键词： Water level regulation soil temperature daily accumulation of photosynthetic quantity growth factor response relationship

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Dynamics of physiological characteristics and dry matter accumulation under rain-water storage irrigation

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International Journal of Agricultural and Biological Engineering 2021年第3期14卷 148-155页

作者： Yuanyuan Li xiaohou Shao Yanbin Li menghua xiao School of Water Conservancy North China University of Water Resource and Electric PowerZhengzhou 450045China College of Water Conservancy and Hydropower Hohai UniversityNanjing 210098China Rural Water Conservancy Research Institute Zhejiang Institute of Hydraulics and EstuaryHangzhou 310020China

Photosynthesis is related to dry matter accumulation in aboveground part of rice plant,which is the direct factor of *** study carried out research on physiological indicators and the relationship between photosynthesis and dry matter accumulation under different water management in paddy *** general,the photosynthetic and physiological indicators showed the trend of increasing and then decreasing with the growth stage of *** results showed that,chlorophyll content and leaf area index of rice leaves showed a quadratic curve positive *** light transmission reached the maximum at heading-flowering stage,and it had quadratic relationship with leaf area index,while it showed extremely positive correlation under rain-water storage irrigation *** rate(Pn)and transpiration rate(Tr)had quadratic curve positive correlation with chlorophyll *** water condition under rain-water storage was favorable for dry matter accumulation in *** multiple regression and main factor analysis,canopy light transmission,light transmission coefficient and Pn were main factors related to dry matter *** conclusions in this article were helpful for promoting rice yield in practice.

关键词： physiological index dry matter accumulation canopy light transmission regression analysis

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Unraveling the modulation essence of p bands in Co-based oxide stability on acidic oxygen evolution reaction

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Nano Research 2024年第7期17卷 5922-5929页

作者： Yafei Yang Yihao Xu Haiquan Liu Qi Zhang Boling Liu menghua Yang Huan Dai Zunjian Ke Dong He xiaobo Feng Xiangheng xiao Department of Physics Zhongnan Hospital of Wuhan UniversityWuhan UniversityWuhan 430072China School of Physics and Electronic Information Yunnan Normal UniversityKunming 650500China Yunnan Key Laboratory of Opto-electronic Information Technology Kunming 650500China

The oxygen evolution reaction(OER)electrocatalysts,which can keep active for a long time in acidic media,are of great significance to proton exchange membrane water ***,Ru-Co_(3)O_(4)electrocatalysts with transition metal oxide Co_(3)O_(4)as matrix and the noble metal Ru as doping element have been prepared through an ion exchange–pyrolysis process mediated by metal-organic framework,in which Ru atoms occupy the octahedral sites of Co_(3)O_(4).Experimental and theoretical studies show that introduced Ru atoms have a passivation effect on lattice *** strong coupling between Ru and O causes a negative shift in the energy position of the O p-band ***,the bonding activity of oxygen in the adsorbed state to the lattice oxygen is greatly passivated during the OER process,thus improving the stability of matrix *** addition,benefiting from the modulating effect of the introduced Ru atoms on the metal active sites,the thermodynamic and kinetic barriers have been significantly reduced,which greatly enhances both the catalytic stability and reaction efficiency of Co_(3)O_(4).

关键词： p-band modulation oxygen evolution reaction stability acidic oxygen evolution reaction(OER)

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Sensitive measurement of silver ions in environmental water samples integrating magnetic ion-imprinted solid phase extraction and carbon dot fluorescent sensor

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Chinese Chemical Letters 2024年第5期35卷 272-276页

作者： Shuangying Li Qingxiang Zhou Zhi Li menghua Liu Yanhui Li State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and EnvironmentChina University of Petroleum-BeijingBeijing 102249China

Increasing use of silver in various fields has caused Ag^(+)pollution in water environment,taking great threats to people’s *** a consequence,establishing rapid and reliable methods for sensitive determination of Ag^(+)is of great ***(FL)sensors based on carbon dots(CDs),an excellent carbonaceous nanomaterial with strong and stable fluorescence,have absorbed extensive attentions in analysis of pollutants due to its advantages of carbon sources being readily available,low cost,easy operation and fast ***,ion-imprinting is a better way to increase the selectivity of the proposed *** work described an effective method for the sensitive measurement of silver ion in water samples in combination with magnetic ion-imprinted solid phase extraction and CDs based fluorescent sensor,which took full advantages of easy separation and high enrichment of magnetic solid phase extraction,high selectivity of ion-imprinting technology,and sensitivity and rapid response of fluorescent sensor from ***-doped CDs derived from dithizone and magnetic ion-imprinted nanomaterial were prepared,and characterized with Fourier transform infrared spectroscopy and transmission electron microscope,*** Ag^(+)imprinted nanomaterial based solid phase extraction was employed for separating and enriching Ag^(+)from water *** significant parameters were optimized in *** the optimal conditions,the proposed method provided good linearity in the range of 0.01-0.4μmol/L and low detection limit of 3 nmol/*** reliability of the proposed method was validated with real water samples,and the results demonstrated that the proposed method was simple,robust,selective and sensitive detection tool for Ag^(+)in real water samples.

关键词： Carbon dots Ag^(+) Magnetic ion-imprinting Magnetic solid phase extraction Fluorescent sensor

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Effects of water and nitrogen coupling on growth,physiology and yield of rice

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International Journal of Agricultural and Biological Engineering 2019年第3期12卷 60-66页

作者： Yuanyuan Li xiaohou Shao Daoxi Li menghua xiao Xiujun Hu Jing He School of Water Conservancy North China University of Water Resource and Electric PowerZhengzhou 450045China College of Water Conservancy and Hydropower Hohai UniversityNanjing 210098China Zhejiang Institute of Hydraulics and Estuary Hangzhou 310020China Institute of Hydraulic and Environmental Engineering Zhejiang University of Water Resources and Electric PowerHangzhou 310018China Nanjing Water Conservancy Construction Engineering Testing Center Co. Ltd.Nanjing 210036China

Water and nitrogen fertilizer are two essential factors for quality and yield formation of *** study was carried out to investigate the effects of water and nitrogen fertilizer coupling on yield-related factors,such as growth(height),physiological indicators(chlorophyll and leaf area index(LAI))and yield composition indicators(productive panicles,thousand grain weight and total grains per panicle).Results showed that,the height difference under two irrigation regimes was not significant,and it showed no difference until the tillering stage(p>0.05).The water control method for controlled and mid-gathering irrigation(CMI)was favorable for nutrients converting to rice *** the height difference for CMI and conventional irrigation(CVI)was the biggest at 80 d after rice *** analysis showed the effect of fertilization on height was significant(p<0.05).With organic fertilizer application,it could control plant growth and promote the nutrients converting to the *** change curve of LAI was similar to chlorophyll *** fertilizer application could not only promote chlorophyll content and LAI,but also delay leaf fading and promote *** fertilizer factors showed significant difference on rice yield,compared to irrigation regimes showing no *** the irrigation and fertilizer factors together,the interaction was *** descending orders for the effects of water and nitrogen on rice yield were fertilizer,water and fertilizer,*** analysis showed that the productive panicles and total grains per panicle of rice were extremely significant on rice yield,and the direct effect of total grains per panicle on yield was greater than that of productive *** study results could provide theoretical basis for water and nitrogen management to improve rice production.

关键词： water and nitrogen coupling controlled and mid-gathering irrigation(CMI) organic fertilizer growth and physiology regression and path analysis rice yield

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不同灌溉模式下常规稻与杂交稻生长及水分利用的差异性分析

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灌溉排水学报 2023年第10期42卷 1-8页

作者：郑世宗肖梦华浙江省水利河口研究院(浙江省海洋规划设计研究院) 杭州310020

【目的】探究浙江省典型水稻品种在薄露灌溉、常规淹灌条件下需耗水规律与生长特性,明晰稻田灌溉调控对水稻需水规律、水分利用及产量的影响机制。【方法】2018—2020年在嘉兴市平湖灌溉试验站开展了田间小区试验,设置了2种水稻品种(常... 详细信息

【目的】探究浙江省典型水稻品种在薄露灌溉、常规淹灌条件下需耗水规律与生长特性,明晰稻田灌溉调控对水稻需水规律、水分利用及产量的影响机制。【方法】2018—2020年在嘉兴市平湖灌溉试验站开展了田间小区试验,设置了2种水稻品种(常规水稻秀水134和杂交水稻甬优9号)和2种灌溉模式(常规淹灌和薄露灌溉),研究了不同灌溉模式下不同水稻品种水稻生长指标(叶面积指数、干物质总量、根系生长、产量)和需水规律(需水量、耗水量、灌溉定额、水分利用效率)变化。【结果】薄露灌溉水稻需耗水量均低于常规淹灌,常规淹灌水稻需耗水受水文年型影响显著,随着降水量增加,全生育期需耗水呈现增加趋势,常规水稻需耗水量均略低于杂交水稻;相比常规淹灌,薄露灌溉日均耗水量降低22.6%~59.5%,不同水稻品种日耗水规律总体上一致,杂交水稻日均耗水量略高于常规水稻,变幅为1.3%~3.0%;相比常规淹灌,薄露灌溉水稻产量增加1.7%;相比常规水稻,杂交水稻产量增加31.9%;相比常规淹灌,薄露灌溉模式灌溉定额降低了30.1%~35.0%,且灌溉水利用效率(WUEI)与耗水利用效率(WUEET)显著提高,不同水稻品种,由于产量差异显著,叠加不同灌溉模式的影响,导致WUEI与WUEET差异显著。【结论】薄露灌溉有利于水稻各生育期叶面积的合理分配和发展,杂交水稻有利于水稻叶面积增长与干物质积累;水稻需耗水量、灌溉定额受灌溉模式、水文年型影响显著,与水稻品种没有相关关系。

关键词：水稻品种需水规律水文年型薄露灌溉生长特性

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