Water and nitrogen use efficiencies in citrus production: A meta-analysis

Qin, Wei; Assinck, F.B.T.; Heinen, M.; Oenema, O.

doi:10.1016/j.agee.2016.01.052

Cited by 84 publications

(47 citation statements)

References 29 publications

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“…Thus, it is reasonable to predict a further reduction of environmental cost for citrus production in Danling County, by optimizing fertilization strategy, including the right rate, right source, right place, and right time [41]. For example, citrus yield, N use efficiency, and water use efficiency can be greatly improved by fertigation technology [42].…”

Section: Further Potential To Reduce Environmental Impact By Local Rementioning

confidence: 99%

Mapping the Environmental Cost of a Typical Citrus-Producing County in China: Hotspot and Optimization

Yang

Long

et al. 2020

Sustainability

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The environmental sustainability of the largest citrus plantation globally is facing a great challenge in China. Further, there is a lack of quantitative, regional hotspot studies. In this study, the life cycle assessment (LCA) was used to quantify the environmental cost of citrus production based on 155 farmers’ surveys from typical citrus orchards in Danling County, southwest China, which produced 0.65% of the country’s total citrus production. The results showed that the average values of environmental risk indicated by global warming potential (GWP), acidification potential (AP), and eutrophication potential (EP) were 11,665 kg CO2-eq ha−1, 184 kg SO2-eq ha−1, and 110 kg PO4-eq ha−1, respectively. The production and utilization of fertilizer ranked the first contribution to the environmental impacts among all the environmental impacts, which contributed 92.4–95.1%, 89.4–89.8%, and 97.8–97.9% to global warming potential, acidification potential, and eutrophication potential, respectively. Specific to the contribution of fertilizers to environmental costs, the production and utilization of nitrogen (N) fertilizer accounted for more than 95% of the total environmental costs. Thus, the spatial distribution of environmental costs in this county was well matched with that of N input. Compared with the average values of investigated 155 orchards, the high yield and high N use efficiency (HH) orchard group with younger and better educated owners achieved a higher citrus yield and N use efficiency with less fertilizer input and lower environmental costs. Five field experiments conducted by local government and Danling Science and Technology Backyard were used to further certify the reduction potential of environment costs. These field results showed that the local recommendation (LR) treatment increased citrus yield and N use efficiency by 1.9–49.5% and 38.0–116%, respectively, whereas decreased environmental costs by 21.2–35.2% when compared with the local farmer practice in the HH orchard group. These results demonstrated that an optimum nutrient management based on the local field recommendation in citrus-producing areas is crucial for achieving a win-win target of productivity and environmental sustainability in China and other, similar countries.

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Section: Further Potential To Reduce Environmental Impact By Local Rementioning

confidence: 99%

Mapping the Environmental Cost of a Typical Citrus-Producing County in China: Hotspot and Optimization

Yang

Long

et al. 2020

Sustainability

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“…Most of the studies on irrigation water use efficiency are conducted at the field level based on experiments [12,13]. Two foci of field experiments include the comparison of irrigation water use efficiency at different water application levels and utilizing various irrigation methods, and the interaction and compatibility of improved irrigation systems and other farm-related management practices that are considered the best (e.g., film or straw mulching, irrigation scheduling, and soil testing) [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Multi-Crop Production Decisions and Economic Irrigation Water Use Efficiency: The Effects of Water Costs, Pressure Irrigation Adoption, and Climatic Determinants

Fan¹,

Massey

Park³

2018

Water

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In an irrigated multi-crop production system, farmers make decisions on the land allocated to each crop, and the subsequent irrigation water application, which determines the crop yield and irrigation water use efficiency. This study analyzes the effects of the multiple factors on farmers’ decision making and economic irrigation water use efficiency (EIWUE) using a national dataset from the USDA Farm and Ranch Irrigation Survey. To better deal with the farm-level data embedded in each state of the U.S., multilevel models are employed, which permit the incorporation of state-level variables in addition to the farm-level factors. The results show higher costs of surface water are not effective in reducing water use, while groundwater costs show a positive association with water use on both corn and soybean farms. The adoption of pressure irrigation systems reduces the soybean water use and increases the soybean yield. A higher EIWUE can be achieved with the adoption of enhanced irrigation systems on both corn and soybean farms. A high temperature promotes more the efficient water use and higher yield, and a high precipitation is associated with lower water application and higher crop yield. Intraclass correlation coefficients (ICC) suggest a moderate variability in water application and EIWUE is accounted by the state-level factors with ICC values greater than 0.10.

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“…Qin et al (2016a) suggested for deficit irrigation (80% of water demand) and N input (low N demand, 200 kg ha -1 ) through simulation-modelling for significantly reducing N losses without yield reduction in drip-irrigated Clementine mandarin in loamy soil under Mediterranean climate. Moreover, Qin et al (2016b) estimated that reducing over-optimal irrigation to optimal irrigation may increase citrus yield by 20%, WUE by 30% and NUE by 15%. Similarly, reducing over-optimal N fertilization to optimal N fertilization might increase yield by 10%, WUE by 15% and NUE by 40%.…”

Section: Introductionmentioning

confidence: 99%

Water and nutrient management effects on water use and yield of drip irrigated citrus in vertisol under a sub-humid region

Panigrahi

Srivastava

2017

Journal of Integrative Agriculture

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Scarcity of water and nutrients in orchards are the major causes of low productivity and decline of citrus in tropics. With a hypothesis that the optimal amount of water and nutrients application through drip irrigation (DI) could save substantial irrigation and fertilizers comparative to that under traditional basin irrigation (BI) with band placement of fertilizer (BPF), this study was conducted in citrus in vertisol of central India. Three DI regimes: I 1 , I 2 and I 3 scheduled at 50% class-A pan evaporation rate (Ep), 75% Ep, and 100% Ep along with three fertilizer doses: F 1 , F 2 and F 3 at 50% recommended dose of fertilizers (RDF), 75% of RDF and 100% of RDF were applied to mandarin plants respectively. Basin irrigation (BI) with band placement of fertilizer (BPF) at 100% RDF was taken for comparison. All the drip-fertigation treatments (except I 1 F 1) produced higher plant growth and fruit yield, with better quality fruits compared with BI+BPF. The highest fruit yield (16.39 t ha-1), water use efficiency (3.9 kg m-3) and fertilizer use efficiency (87.3 kg kg-1) were observed in I 2 F 2. The concentrations of N, K and Fe in leaves were significantly higher in I 2 F 2. The leaf photosynthesis, stomatal conductance (g s) and transpiration were higher in I 3 F 3. However, leaf water use efficiency (LWUE, photosynthesis/transpiration) was highest in I 2 F 2. The overall results of this study demonstrated that the application of optimum quantity of water and fertilizers (I 2 F 2) through DI could be a productive and water efficient option in citrus production in vertisol.

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Water and nitrogen use efficiencies in citrus production: A meta-analysis

Cited by 84 publications

References 29 publications

Mapping the Environmental Cost of a Typical Citrus-Producing County in China: Hotspot and Optimization

Mapping the Environmental Cost of a Typical Citrus-Producing County in China: Hotspot and Optimization

Multi-Crop Production Decisions and Economic Irrigation Water Use Efficiency: The Effects of Water Costs, Pressure Irrigation Adoption, and Climatic Determinants

Water and nutrient management effects on water use and yield of drip irrigated citrus in vertisol under a sub-humid region

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