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water-saving irrigation

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
Luis Noguera-Artiaga, David Pérez-López, Armando Burgos-Hernández, Aneta Wojdyło, Ángel A Carbonell-Barrachina
The current water scarcity forces farmers to adopt new irrigation strategies to save water without jeopardizing the fruit yield and quality. In this study, the influence of 3 regulated deficit irrigation (RDI) treatments and 3 rootstocks on the functional quality of pistachios were studied. The functional parameters studied included, polyphenols, triterpenoids, and inhibition of α-amylase. The results showed that P. terebinthus and P. atlantica rootstocks led to pistachio kernels with higher contents of polyphenols and triterpenoids (mainly betulinic acid with 111 and 102 µg g-1 , respectively) than pistachios obtained using P...
September 30, 2018: Food Chemistry
Sheshshayee M Sreeman, Preethi Vijayaraghavareddy, Rohini Sreevathsa, Sowmya Rajendrareddy, Smitharani Arakesh, Pooja Bharti, Prathibha Dharmappa, Raju Soolanayakanahally
Burgeoning population growth, industrial demand, and the predicted global climate change resulting in erratic monsoon rains are expected to severely limit fresh water availability for agriculture both in irrigated and rainfed ecosystems. In order to remain food and nutrient secure, agriculture research needs to focus on devising strategies to save water in irrigated conditions and to develop superior cultivars with improved water productivity to sustain yield under rainfed conditions. Recent opinions accruing in the scientific literature strongly favor the adoption of a " trait based " crop improvement approach for increasing water productivity...
2018: Frontiers in Chemistry
Ji Kun Xu, Zhen Wen Yu, Yu Shi, Jun Ye Zhao, Xi Zhi Wang, Yu Qiu Wang
A two-year field experiment was conducted in 2014-2015 and 2015-2016 wheat growing seasons to study the effects of micro-sprinkling hose length and width on field water condition, and flag leaf chlorophyll fluorescence characteristics in different sampling districts (D1 to D6 along with the hose laying direction). Six micro-sprinkling hose treatments were set: 60 m (T1 ), 80 m (T2 ) and 100 m (T3 ) lengths under 65 mm width; 60 m (T4 ), 80 m (T5 ) and 100 m (T6 ) lengths under 80 mm width. The results showed that after irrigation at jointing, the Christiansen uniformity coefficient (Cu ) of T1 was significantly higher than T2 and T3 under 65 mm hose width...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
Jorge A Zegbe, Alfonso Serna-Pérez
BACKGROUND: A two-year study assessed deficit irrigation options for their effects on water-saving, yield, fruit quality, and postharvest performance of 'Smooth Red' cactus pear. We evaluated: (i) full irrigation (FI), (ii) partial rootzone drying (PRD), (iii) deficit irrigation (DI), and (iv) non-irrigated (NI) treatment as control. RESULTS: The FI plants had the largest fruit size and the highest yield. PRD and DI plants used irrigation water with the highest efficiency and had the highest water productivity...
November 2018: Journal of the Science of Food and Agriculture
Rajendra P Sishodia, Sanjay Shukla, Suhas P Wani, Wendy D Graham, James W Jones
Simultaneous effects of future climate and irrigation intensification on surface and groundwater systems are not well understood. Efforts are needed to understand the future groundwater availability and associated surface flows under business-as-usual management to formulate policy changes to improve water sustainability. We combine measurements with integrated modeling (MIKE SHE/MIKE11) to evaluate the effects of future climate (2040-2069), with and without irrigation expansion, on water levels and flows in an agricultural watershed in low-storage crystalline aquifer region of south India...
September 1, 2018: Science of the Total Environment
Omar Aziz, Saddam Hussain, Muhammad Rizwan, Muhammad Riaz, Saqib Bashir, Lirong Lin, Sajid Mehmood, Muhammad Imran, Rizwan Yaseen, Guoan Lu
The looming water resources worldwide necessitate the development of water-saving technologies in rice production. An open greenhouse experiment was conducted on rice during the summer season of 2016 at Huazhong Agricultural University, Wuhan, China, in order to study the influence of irrigation methods and nitrogen (N) inputs on water productivity, N economy, and grain yield of rice. Two irrigation methods, viz. conventional irrigation (CI) and "thin-shallow-moist-dry" irrigation (TSMDI), and three levels of nitrogen, viz...
June 2018: Environmental Science and Pollution Research International
Shihong Yang, Ya Nan Xiao, Junzeng Xu
Quantifying carbon sequestration in paddy soil is necessary to understand the effect of agricultural practices on carbon cycles. The objective of this study was to assess the effect of organic fertilizer addition (MF) on the soil respiration and net ecosystem carbon dioxide (CO2 ) absorption of paddy fields under water-saving irrigation (CI) in the Taihu Lake Region of China during the 2014 and 2015 rice-growing seasons. Compared with the traditional fertilizer and water management (FC), the joint regulation of CI and MF (CM) significantly increased the rice yields and irrigation water use efficiencies of paddy fields by 4...
April 2018: Environmental Science and Pollution Research International
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