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water-saving irrigation

Shouhong Zhang, Jianjun Zhang, Tongjia Yue, Xueer Jing
Rainwater harvesting (RWH) is promoted in many cities (e.g., Beijing and Shenzhen) as a climate change adaptation measure to relieve urban water supply and drainage pressures. In this study, the impacts of future climate change on water saving and stormwater capture performances of RWH systems at cities across four climatic zones of China are investigated. A downscaling technique based on the Climate Generator is evaluated and employed to generate future (2020-2050) daily rainfall data. Performance indices of RWH systems (i...
February 11, 2019: Science of the Total Environment
Shihong Yang, Xiao Sun, Jie Ding, Zewei Jiang, Junzeng Xu
The addition of biochar has been reported as a strategy for improving soil fertility, crop productivity, and carbon sequestration. However, information regarding the effects of biochar on the carbon cycle in paddy fields under water-saving irrigation remains limited. Thus, a field experiment was conducted to investigate the effects of biochar addition on the net ecosystem exchange (NEE) of CO2 and soil organic carbon (SOC) content of paddy fields under water-saving irrigation in the Taihu Lake region of China...
January 31, 2019: Environmental Science and Pollution Research International
Lingling Hua, Limei Zhai, Jian Liu, Hongbin Liu, Fulin Zhang, Xianpeng Fan
In lowland agriculture, paddy fields are present in the form of irrigation-drainage unit (IDU), which consists of paddy fields and natural ditches around the fields. Phosphorus (P) export from IDUs significantly impacts water quality in adjacent water bodies. In this study, we explored the characteristics and behavior of P in a typical IDU in Jianghan Plain, China. From 2012 to 2015, we measured P concentrations in different water components of the IDU, i.e., rainwater, irrigation water, field ponding water, runoff water and ditch water, and accounted for spatial and temporal variabilities of the P concentrations...
January 28, 2019: Journal of Environmental Management
Seema Sahay, Saba Iqbal, Akhtar Inam, Meetu Gupta, Arif Inam
To evaluate the impact of waste water (WW) irrigation, four Brassica species, namely B. campestris, B. juncea, B. napus, and B. nigra, were grown for 2 years in the agricultural field. First-year experiment (2014-2015) was conducted with the comparative effect of WW and ground water (GW) under a uniform dose of NPK (N80 P45 K45 , kg ha-1 ). WW irrigation proved efficacious over GW to increase growth, physiological, and yield parameters. Increase in all parameters was due to the use of WW which leads to the improvement in the physico-chemical properties of soil as compared to resulted soil from GW application...
January 28, 2019: Environmental Monitoring and Assessment
A R Omer, J E Henderson, L Falconer, R Krӧger, P J Allen
Best management practices (BMPs) are conservation efforts implemented to address environmental challenges associated with agricultural production. One such BMP, a tailwater recovery (TWR) system, has a dual purpose aimed at mitigating solids and nutrient losses from agricultural landscapes and creating an additional surface water source for irrigation. This study analyzes the costs of using five TWR systems to reduce solids, nutrients, and retain water. All systems were located in the Lower Mississippi Alluvial Valley and were used to irrigate crops including rice (Oryza sativa), corn (Zea mays), and soybeans (Glycine max)...
January 22, 2019: Journal of Environmental Management
Shahzad Ali, Yueyue Xu, Xiangcheng Ma, Malak Henchiri, Tie Cai, Xiaolong Ren, Jiahua Zhang, Zhikuan Jia
Determining the effect of ridge-furrow cultivation mode on 13 C carbon isotope discrimination, photosynthetic capacity, and leaf gas exchange characteristics of winter wheat leaves will help to increase wheat production. To verify these effects of cultivation modes with deficit irrigation will provide scientific basis for determining water-saving strategy. Therefore, a mobile rainproof shelter was used to explore the potential benefit of two cultivation modes: (1) the ridge-furrow (RF) precipitation system and (2) traditional flat planting (TF) with two deficit irrigation levels (150, 75 mm) and three precipitation levels (275 mm, 200 mm, 125 mm) were tested in this study...
January 5, 2019: Environmental Science and Pollution Research International
Xiawei Liao, Li Chai, Junping Ji, Zhifu Mi, Dabo Guan, Xu Zhao
China's household energy demands' life-cycle water uses from 2002 to 2015 are quantified with an Input-Output analysis disaggregating rural and urban impacts. 9.73 and 1.60 km3 of water was withdrawn and consumed respectively in the life cycle of Chinese household energy demands in 2015, which was dominated by power and heat uses. An average urbanite's household energy uses, including coal, gas, petroleum products, power and heat, require about four times of life-cycle water uses than its rural counterpart...
February 1, 2019: Journal of Environmental Management
Wen Yin, Qiang Chai, Zhi Long Fan, Fa Long Hu, Cai Zhao, Ai Zhong Yu
Reasonable cropping pattern can improve resource utilization efficiency, reduce environmental risks in agricultural production, and achieve the goal of resource saving coupled with high production and efficiency. We evaluated the production effects of typical cropping patterns in an arid irrigation region from several aspects, including resource utilization, carbon emissions, economic benefit, emergy self-sufficiency ratio and net emergy yield ratio, with the method of emergy theory, to provide theoretical and practical basis for the establishment of efficient cropping with lower resource investment and carbon emissions but higher yield and resource utilization efficiency combined with the sustainability of agricultural production...
November 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Bing Xin Wang, Jun Ye Zhao, Yu Shi, Zhen Wen Yu
To explore the optimal hose length of micro-sprinkling hose irrigation in wheat fields, a field trial taking JiMai 22 as test material was carried out in two growing seasons (2015-2016 and 2016-2017). Three lengths of micro-sprinkling hoses with 80-mm width were used, including 60 m (T1 ), 80 m (T2 ) and 100 m (T3 ). The length of trial plot was equal to the hose length. The trial plots were divided to different sample sections every 20-m length along the irrigation direction, which were named as A, B, C, D and E sections, respectively, to examine the effects of micro-sprinkling hose irrigations with different hose lengths on soil water distribution, dry matter accumulation and grain yield of wheat fields...
November 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Shihong Yang, Zewei Jiang, Xiao Sun, Jie Ding, Junzeng Xu
The role of carbon pool of biochar as a method of long-term C sequestration in global warming mitigation is unclear. A two-year field study was conducted to investigate the seasonal variations of CO₂ emissions from water-saving irrigation paddy fields in response to biochar amendment and irrigation patterns. Three biochar treatments under water-saving irrigation and one biochar treatment under flooding irrigation were studied, and the application rates were 0, 20, 40, and 40 t ha-1 and labeled as CI + NB (controlled irrigation and none biochar added), CI + MB (controlled irrigation and medium biochar added), CI + HB (controlled irrigation and high biochar added), and FI + HB (flood irrigation and high biochar added), respectively...
November 18, 2018: International Journal of Environmental Research and Public Health
Nektarios N Kourgialas, Georgios C Koubouris, Zoi Dokou
Water scarcity in the Mediterranean region is becoming a growing concern, threatening the viability of agriculture, which is one of the main economic sectors in many areas. The design of an optimal irrigation management plan, based on state-of-the-art measuring and modeling tools, can effectively contribute towards water saving efforts and potentially address the water scarcity issue in the region. This paper describes the development and application of an integrated decision-making system for the management of water resources of olive and citrus crops in the North of Chania, Crete, Greece...
November 9, 2018: Science of the Total Environment
Emily Rames, Joanne Macdonald
Assessment of viral contamination is essential for monitoring the microbial quality of water and protection of public health, as human virus presence is not accurately determined using bacterial indicators. Currently, the time required for conventional viral testing means that water contaminated with human pathogens may be used (e.g. for drinking, recreation or irrigation) days before results are available. Here we report a new rapid method for coliphage enumeration, the QuantiPhage (QP) assay. The novelty of the assay is the use of cellulose absorbent pad materials to support coliphage growth and colorimetric detection, in place of agar that is used in the plaque assay...
November 2, 2018: Water Research
H Nouri, B Stokvis, A Galindo, M Blatchford, A Y Hoekstra
Water scarcity has received global attention in the last decade as it challenges food security in arid and semi-arid regions, particularly in the Middle East and North Africa. This research assesses the possible alleviation of water scarcity by reducing the water footprint in crop production through the application of soil mulching and drip irrigation. The study is the first to do so at catchment scale, taking into account various crops, multi-cropping, cropping patterns, and spatial differences in climate, soil, and field management factors, using field survey and local data...
October 26, 2018: Science of the Total Environment
Gyan Chhipi-Shrestha, Manuel Rodriguez, Rehan Sadiq
Globally the trend of water reuse has been increasing. The public perception and government regulations are supportive for reclaimed water use in Canada. Reclaimed water can be used in variety of applications that may have different performance in economic, environmental and social dimensions for various stakeholders, indicating decision on water reuse selection is complex. This research proposes a multi-criteria multi-decision-makers framework combining multicriteria decision analysis (MCDA) and game theory for a selection of a sustainable water reuse application...
February 10, 2019: Science of the Total Environment
Shihong Yang, Yanan Xiao, Junzeng Xu, Xiaoyin Liu
Straw return (SR) and rice water-saving irrigation (WSI) affect the greenhouse gas emission of paddy fields. However, studies on CO2 exchange between paddy fields and the atmosphere with joint regulation of SR and WSI are few. We conducted a two-year field experiment to investigate the effects of SR on soil respiration and net ecosystem exchange of CO2 (NEE) in paddy fields under controlled irrigation (CI), which is a typical WSI technique. The rice yields, irrigation water use efficiency, seasonal variations in soil respiration, NEE, and soil organic carbon content were measured...
2018: PloS One
Olutobi Adeyemi, Ivan Grove, Sven Peets, Yuvraj Domun, Tomas Norton
Sustainable freshwater management is underpinned by technologies which improve the efficiency of agricultural irrigation systems. Irrigation scheduling has the potential to incorporate real-time feedback from soil moisture and climatic sensors. However, for robust closed-loop decision support, models of the soil moisture dynamics are essential in order to predict crop water needs while adapting to external perturbation and disturbances. This paper presents a Dynamic Neural Network approach for modelling of the temporal soil moisture fluxes...
October 11, 2018: Sensors
Yan Meng, Xiao Han Sun, Bin Zheng, Liang Wang, Zeng Jia Li, Geng Li, Tang Yuan Ning
Managements of organic matter and irrigation after anthesis will increase the capacities of water conservation and supply in maize field, with consequences on photosynthetic performance and yield under water-saving condition. We analyzed the gas exchange parameters and the performance of the photosystem 2 of ear leaves, and yield of maize cultivars Zhengdan 958, under three modes of ditch-buried organic matter (no straw returned: M0 , wheat straw returned: M1 , mixtures of cow manure and wheat straw returned: M2 ) before seeding with two irrigation levels after anthesis (normal irrigation: W1 , water-saving irrigation: W2 )...
August 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Bhumika Uniyal, Jörg Dietrich, Ngoc Quynh Vu, Madan K Jha, José Luis Arumí
Irrigation water is one of the most substantial water uses worldwide. Thus, global simulation studies about water availability and demand typically include irrigation. Nowadays, regional scale is of major interest for water resources management but irrigation lacks attention in many catchment modelling studies. This study evaluated the performance of the agro-hydrological model SWAT (Soil and Water Assessment Tool) for simulating streamflow, evapotranspiration and irrigation in four catchments of different agro-climatic zones at meso-scale (Baitarani/India: Subtropical monsoon; Ilmenau/Germany: Humid; Itata/Chile: Mediterranean; Thubon/Vietnam: Tropical)...
February 1, 2019: Science of the Total Environment
Paola A Deligios, Anna Paola Chergia, Gavino Sanna, Stefania Solinas, Giuseppe Todde, Luis Narvarte, Luigi Ledda
The setting up of innovative irrigation water management might contribute to the mitigation of negative issues related to climate change. Our hypothesis was that globe artichoke irrigated with a traditionally drip system could be converted to an innovative water management system based on precision irrigation techniques and on evaporative cooling application in order to improve crop physiological status with positive impacts on earliness, total heads yield and water saving. Over two experiments carried out at plot- and field-scale, two irrigation management systems, differing in type and application time, were compared: (i) conventional, and (ii) canopy-cooling...
February 1, 2019: Science of the Total Environment
Huan Fang, Hu Zhou, Gareth J Norton, Adam H Price, Annette C Raffan, Sacha J Mooney, Xinhua Peng, Paul D Hallett
Background and aims: Alternate wetting and drying (AWD) saves water in paddy rice production but could influence soil physical conditions and root growth. This study investigated the interaction between contrasting rice genotypes, soil structure and mechanical impedance influenced by hydraulic stresses typical of AWD. Methods: Contrasting rice genotypes, IR64 and deeper-rooting Black Gora were grown in various soil conditions for 2 weeks. For the AWD treatments the soil was either maintained in a puddled state, equilibrated to -5 kPa (WET), or dried to -50 kPa and then rewetted at the water potential of -5 kPa (DRY-WET)...
2018: Plant and Soil
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