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water-saving irrigation

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
Suhad A A A N Almuktar, Suhail N Abed, Miklas Scholz
Background : In order to save potable water, this study aims to evaluate the contamination of soil and Capsicum annuum L. (chilli) watered with urban wastewater (sewage) pre-treated by various wetland systems. Methods : The appropriateness of wetland outflow for irrigation when applying reused wastewater with high contamination of minerals and pathogens was assessed. The impact of wastewaters pre-treated by various wetlands on soil and harvest was tested in terms of mineral and biological contamination risk...
August 18, 2018: International Journal of Environmental Research and Public Health
F Alcon, S Tapsuwan, R Brouwer, M Yunes, O Mounzer, M D de-Miguel
Lebanon is facing an increasing water supply deficit due to the increasing demand for freshwater, decreasing surface and groundwater resources and malfunctioning water governance structures. Technological and policy changes are needed to alleviate the impact of water scarcity and secure water in the future. This paper investigates farmers' preferences and willingness to pay (WTP) in a choice experiment for a series of water saving measures at plot and irrigation district level, including more timely information of water delivery...
January 10, 2019: Science of the Total Environment
Yuanchun Zou, Xun Duan, Zhenshan Xue, Mingju E, Mingyang Sun, Xianguo Lu, Ming Jiang, Xiaofei Yu
To analyze the water use conflict and its driving factors between wetland and agriculture at both regional and local scales, agricultural water consumption and wetland water storage changes in the Sanjiang Plain, the main grain-producing area in Heilongjiang Province of Amur River Basin, were investigated based on statistical data, field survey and GIS calculation. A specific case study in the Qixing River National Nature Reserve (QNNR) wetland-farmland system was completed using a water balance approach. Results showed that the proportion of agricultural water increased from 71...
October 15, 2018: Journal of Environmental Management
Shahzad Ali, Yueyue Xu, Qianmin Jia, Irshad Ahmad, Xiangcheng Ma, Malak Henchiri, Xiaolong Ren, Peng Zhang, Tie Cai, Jiahua Zhang, Zhikuan Jia
In semi-arid areas of China, the ridge-furrow mulched with plastic film (RF) cultivation system is a common water-saving agricultural technique where the shortage of water resources has become a serious problem. Therefore, we aimed to explore whether this cultivation is actually an improvement over the traditional flat planting (TF) method while testing two deficit irrigation (150, 75 mm) levels to grow winter wheat. Furthermore, we examined the responses of the anti-oxidative defence system and photosynthetic capacity of winter wheat flag leaves under three simulated rainfall (275, 200 and 125 mm) conditions...
2018: PloS One
Wilson Mendoza, Dominick Mendola, Jang Kim, Charles Yarish, Alyssa Velloze, B Greg Mitchell
This work developed a laboratory prototype methodology for cost-effective, water-sparing drip-irrigation of seaweeds, as a model for larger-scale, on-land commercial units, which we envision as semi-automated, inexpensive polyethylene sheet-covered bow-framed greenhouses with sloping plastic covered floors, water-collecting sumps, and pumped recycling of culture media into overhead low-pressure drip emitters. Water droplets form on the continually wetted interior plastic surfaces of these types of greenhouses scattering incoming solar radiation to illuminate around and within the vertically-stacked culture platforms...
2018: PloS One
Ipsita Kar, Sudhir-Yadav, Amit Mishra, Basudev Behera, Chandramani Khanda, Virender Kumar, Ashok Kumar
Increasing farm labor scarcity and depletion of natural resources such as water are posing a major threat to the sustainability of traditional puddled transplanted rice (PTR) farming in Eastern India. Dry-seeded rice (DSR) or non-puddled transplanted rice (NPTR) could be used as an alternative to PTR. To understand the trade-off with different water management and rice genotypes under non-puddled conditions, a field experiment was conducted during 2014-2015 on a sandy clay loam soil of Bhubaneswar, Odisha. The treatments for water regimes were based on soil water tension (no stress, 10 kPa, and 40 kPa) at 15-cm soil depth and the cultivars used in the study were inbreds (Lalat and Sahbhagi Dhan) and hybrids (Arize® 6129, 6444, and US 323)...
June 1, 2018: Field Crops Research
Omar Aziz, Saddam Hussain, Muhammad Rizwan, Muhammad Riaz, Saqib Bashir, Lirong Lin, Sajid Mehmood, Muhammad Imran, Rizwan Yaseen, Guoan Lu
The original publication of this paper contains a mistake.
May 1, 2018: Environmental Science and Pollution Research International
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