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water-saving irrigation

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...
July 30, 2018: 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...
April 24, 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
Di Zhang, Ruiqi Li, William D Batchelor, Hui Ju, Yanming Li
The North China Plain is one of the most important grain production regions in China, but is facing serious water shortages. To achieve a balance between water use and the need for food self-sufficiency, new water efficient irrigation strategies need to be developed that balance water use with farmer net return. The Crop Environment Resource Synthesis Wheat (CERES-Wheat model) was calibrated and evaluated with two years of data which consisted of 3-4 irrigation treatments, and the model was used to investigate long-term winter wheat productivity and water use from irrigation management in the North China Plain...
2018: PloS One
Bridget R Scanlon, Zizhan Zhang, Himanshu Save, Alexander Y Sun, Hannes Müller Schmied, Ludovicus P H van Beek, David N Wiese, Yoshihide Wada, Di Long, Robert C Reedy, Laurent Longuevergne, Petra Döll, Marc F P Bierkens
Assessing reliability of global models is critical because of increasing reliance on these models to address past and projected future climate and human stresses on global water resources. Here, we evaluate model reliability based on a comprehensive comparison of decadal trends (2002-2014) in land water storage from seven global models (WGHM, PCR-GLOBWB, GLDAS NOAH, MOSAIC, VIC, CLM, and CLSM) to trends from three Gravity Recovery and Climate Experiment (GRACE) satellite solutions in 186 river basins (∼60% of global land area)...
February 6, 2018: Proceedings of the National Academy of Sciences of the United States of America
He-De Gong, Yan-Jing Geng, Chun Yang, Dong-Ying Jiao, Liang Chen, Zhi-Quan Cai
This study is to test how seedlings (vegetative) and large plants (reproductive) of an oilseed crop (Plukenetia volubilis) responded to regulated deficit irrigation techniques (conventional deficit irrigation, DI; alternative partial root-zone irrigation, APRI) in a tropical humid monsoon area. Seedlings were more sensitive to water deficit than large plants. Although APRI did better than DI in saving water for both seedlings and large plants at the same amount of irrigation, full irrigation (FI) is optimal for faster seedling growth at the expense of water-use efficiency (WUE)...
January 8, 2018: Scientific Reports
Guang Yang, Lianqing Xue, Xinlin He, Cui Wang, Aihua Long
Widespread application of water-saving measures, especially advanced drip irrigation technologies, may significantly impact on the land use, and further potentially alter regional ecological environments in an arid area. In this study, the remote sensing and geographic information system technology were used to analyze the LANDSAT images (1976-2015) and the MOD16 evapotranspiration data (2000-2015) in the Manas River Basin (MRB), China where the water-saving technologies have experienced the past 40 years. Our results show that the area of the cultivated land was approximately doubled from 1976 to 2015 with a dynamic degree of cultivated land ranging from 1...
December 19, 2017: Scientific Reports
Ashley Rivera, Thushara Gunda, George M Hornberger
Climate change coupled with increasing demands for water necessitates an improved understanding of the water-food nexus at a scale local enough to inform farmer adaptations. Such assessments are particularly important for nations with significant small-scale farming and high spatial variability in climate, such as Sri Lanka. By comparing historical patterns of irrigation water requirements (IWRs) to rice planting records, we estimate that shifting rice planting dates to earlier in the season could yield water savings of up to 6%...
May 2018: Ambio
Pouya Vahmani, Andrew D Jones
Many cities globally are seeking strategies to counter the consequences of both a hotter and drier climate. While urban heat mitigation strategies have been shown to have beneficial effects on health, energy consumption, and greenhouse gas emissions, their implications for water conservation have not been widely examined. Here we use a suite of satellite-supported regional climate simulations in California to show that broad implementation of cool roofs, a heat mitigation strategy, not only results in significant cooling, but can also meaningfully decrease outdoor water consumption by reducing evaporative and irrigation water demands...
October 20, 2017: Nature Communications
Zhenhua Zhao, Liling Xia, Xin Jiang, Yanzheng Gao
The effects of different water-saving modes on PAHs residue and risk, field environment conditions and enzyme activities in paddy field were investigated in a field experiment plot in Laoyaba, Nanjing, China. Results showed that (1) water-saving treatment affected greatly the ΣPAHs in water and soil. The order of ΣPAHs residue in surface water and groundwater in farmland is as follows: dry fields<water-saving paddy field<flooding irrigation paddy field. The ΣPAHs in water during rice tillering stage were obviously higher than that in rice booting stage and milky stage, and the percentage of high-ring PAHs gradually reduced in water...
October 17, 2017: Science of the Total Environment
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