Dry-season deficit irrigation increases agricultural water use efficiency at the expense of yield and agronomic nutrient use efficiency of Sacha Inchi plants in a tropical humid monsoon area

2017 ◽  
Vol 109 ◽  
pp. 570-578 ◽  
Author(s):  
Y.J. Geng ◽  
L. Chen ◽  
C. Yang ◽  
D.Y. Jiao ◽  
Y.H. Zhang ◽  
...  
Keyword(s):  
Water Use ◽  
Deficit Irrigation ◽  
Nutrient Use Efficiency ◽  
Agricultural Water ◽  
Agricultural Water Use ◽  
Nutrient Use ◽  
Monsoon Area ◽  
Use Efficiency ◽  
Sacha Inchi ◽  
Agronomic Nutrient Use Efficiency

scholarly journals Spatial–Temporal Evolution Characteristics and Influencing Factors of Agricultural Water Use Efficiency in Northwest China—Based on a Super-DEA Model and a Spatial Panel Econometric Model

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 632
Author(s):  
Weinan Lu ◽  
Wenxin Liu ◽  
Mengyang Hou ◽  
Yuanjie Deng ◽  
Yue Deng ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Water Resource ◽  
Arid Regions ◽  
Econometric Model ◽  
Northwest China ◽  
Agricultural Water ◽  
Agricultural Water Use ◽  
Use Efficiency ◽  
Semi Arid

Improving agricultural water use efficiency (AWUE) is an important way to solve the shortage of water resources in arid and semi-arid regions. This study used the Super-DEA (data envelopment analysis) to measure the AWUE of 52 cities in Northwest China from 2000 to 2018. Based on spatial and temporal perspectives, it applied Exploratory Spatial Data Analysis (ESDA) to explore the dynamic evolution and regional differences of AWUE. A spatial econometric model was then used to analyze the main factors that influence the AWUE in Northwest China. The results showed firstly that the overall AWUE in Northwest China from 2000 to 2018 presented a steady upward trend. However, only a few cities achieved effective agricultural water usage by 2018, and the differences among cities were obvious. Secondly, AWUE showed an obvious spatial autocorrelation in Northwest China and showed significant high–high and low–low agglomeration characteristics. Thirdly, economic growth, urbanization development, and effective irrigation have significant, positive effects on AWUE, while per capita water resource has a significant, negative influence. Finally, when improving the AWUE in arid and semi-arid regions, plans should be formulated according to local conditions. The results of this study can provide new ideas on the study of AWUE in arid and semi-arid regions and provide references for the formulation of regional agricultural water resource utilization policies as well.

Monitoring regional agricultural water use efficiency for Hebei Province on the North China Plain

2002 ◽  
Vol 53 (1) ◽  
pp. 55 ◽  
Author(s):  
Tim R. McVicar ◽  
Guanglu Zhang ◽  
Andrew S. Bradford ◽  
Huixiao Wang ◽  
Warrick R. Dawes ◽  
...  
Keyword(s):  
Time Series ◽  
Water Use Efficiency ◽  
Water Use ◽  
North China Plain ◽  
North China ◽  
Agricultural Practices ◽  
Water Saving ◽  
Agricultural Water ◽  
Agricultural Water Use ◽  
Use Efficiency

Increasing competition for water in China, due to industrialisation of its economy and urbanisation of its population, has led to the introduction of water-saving agricultural practices in an attempt to increase agricultural water use efficiency (Ag WUE). This study was conducted to assess whether changes in management practices have increased regional Ag WUE for a focus area covering 20% of the 300 000 km2 North China Plain (NCP). An ‘input–output’ definition of regional Ag WUE was used, where ‘input’ is the water available over the crop growing season and ‘output’ is grain yield. Regional databases of precipitation, irrigation, and yield from 1984 to 1996 were established in a Geographic Information System (GIS) to calculate winter wheat and summer corn Ag WUE on a county basis. For wheat, the average Ag WUE was 7.0 kg/ha.mm in 1984, whereas in 1996 it was 14.3 kg/ha.mm. For corn, Ag WUE increased from 9.0 kg/ha.mm in 1984 to 10.1 kg/ha.mm in 1996, although values >11.5 kg/ha.mm were obtained for both 1991 and 1992. Time series plots of the resulting Ag WUE, and its components, were generated to reveal spatial and temporal variability. Counties with a relatively high mean Ag WUE in combination with low year-to-year consistency have been identified as those with the highest potential for improving Ag WUE management. Total county water resources (WR) were also calculated for the time series, and county-basis normalisation of Ag WUE and WR also showed that there have been recent improvements in Ag WUE. For some counties in wet years, there may be an opportunity to plant larger areas of crop to increase county level Ag WUE. For the focus study site (and for the time series data available), it is most likely that recently introduced water-saving agricultural practices in the NCP are associated with improvements to Ag WUE.

scholarly journals Response of Irrigation and Mulching on Yield, Water Use Efficiency, Nutrient Use Efficiency and Economy of Mango Cv. Banganpalli in (Semiarid Region) Southern Telangana Region

2020 ◽  
pp. 215-224
Author(s):  
Guvvali Thirupathaiah ◽  
A. Bhagwan ◽  
A. Kiran Kumar ◽  
K. Avil Kumar ◽  
D. Vijaya
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Water Consumption ◽  
Drip Irrigation ◽  
Nutrient Use Efficiency ◽  
Maximum Yield ◽  
Net Return ◽  
Nutrient Use ◽  
Maximum Water ◽  
Use Efficiency

An investigation was carried out on sandy loam soils of semi arid regions of southern Telangana to analyze the potential of drip irrigation along with mulch on mango fruit yield, water and nutrient use efficiency. The treatments of present study were comprised of two levels mulching (M0-without mulch and M1-with mulching), with silver Polyethylene of 100 micron thickness were used and two levels of irrigation (I1 -75% and I2 100% ETc through drip), here irrigation levels and mulching together constituting four treatment combinations with five replications under 2x2 factorial randomized block design and the treatment combinations are: I1M0-75% ETc + No mulching, I1M1- 75% ETc + with mulch, I2M0- 100% ETc + No mulching and I2M1- 100 % ETc + with mulch.  The study revealed that drip irrigation 100% ETc along with silver polythene mulch showed better performance in terms of yield, water use efficiency, nutrient use efficiency as well as economics. Maximum yield of 89.11 kg tree-1 combination of 75 % ETc + with mulching has proven the maximum water use efficiency (5.54 g liter-1 water consumption) and fertilizers use efficiency (0.89 q kg-1 fertilizer application) however along with maximum net return of 400973. 90 rupees ha-1, net return of 346873.90 ha-1 per hectare and B: C ratio of 7.41 was recorded in I2M1 (100 % ETc + with mulch). So the experiment suggests that drip irrigation along with mulch has the potential to provide greater benefit by optimizing the use of water resources. But the interaction of 75 % ETc + with mulching has proven the maximum water use efficiency (6.28 g liter-1 water consumption).

scholarly journals Performance of Mulching and Fertigation on Nutrient Uptake and Nutrient Use Efficiency in Okra (Abelmoschus Esculentus L. Moench) for Seed Production

2020 ◽  
Vol 8 (1) ◽  
pp. 25-29
Author(s):  
N. S. Nagegowda ◽  
S. Shankar Hebbar ◽  
V.M. Shilpashree
Keyword(s):  
Water Use ◽  
Seed Yield ◽  
Nutrient Use Efficiency ◽  
Water Soluble ◽  
Fertilizer Use ◽  
Soil Application ◽  
Nutrient Use ◽  
Npk Uptake ◽  
Use Efficiency ◽  
Soluble Fertilizer

Application of water soluble fertilizer @ T4-150:75:150 NPK kg/ha through fertigation either with mulch (14.05q/ha) or non-mulch (11.83q/ha) recorded significantly higher seed yield than fertilization through soil application (9.92 q/ha). The increased seed yield of 16.91 and 10.14 per cent was noticed in fertigation with mulch or without mulch treatment over soil application, respectively. NPK fertigation @150:75:150kg per ha with mulch (T4) resulted in higher NPK uptake in stem (63.49, 14.12&121.42 kg/ha), leaves (117.65 19.42&122.43 kg/ha) and in fruits (146.79 28.05&162.66 kg/ha), respectively than the fertilizer applied through soil at harvest. Maximum fertilizer use efficiency and water use efficiency were recorded in the treatment with integrated application of fertigation and mulch.

Improving agricultural water use efficiency with biochar – A synthesis of biochar effects on water storage and fluxes across scales

2019 ◽  
Vol 657 ◽  
pp. 853-862 ◽  
Author(s):  
Benjamin M.C. Fischer ◽  
Stefano Manzoni ◽  
Laura Morillas ◽  
Monica Garcia ◽  
Mark S. Johnson ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Water Storage ◽  
Agricultural Water ◽  
Agricultural Water Use ◽  
Use Efficiency

scholarly journals Analysis of Agricultural Water Use Efficiency Based on Analytic Hierarchy Process and Fuzzy Comprehensive Evaluation in Xinjiang, China

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3266
Author(s):  
Peibing Song ◽  
Xiaoying Wang ◽  
Chao Wang ◽  
Mengtian Lu ◽  
Lei Chen ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Irrigation Water ◽  
Evaluation Model ◽  
Fuzzy Evaluation ◽  
Agricultural Water ◽  
Analytic Hierarchy ◽  
Agricultural Water Use ◽  
Use Efficiency ◽  
Hierarchy Process

Improving agricultural water use efficiency (WUE) and reducing the proportion of agricultural water consumption are of great significance for coping with the water crisis in the world, particularly in northwest China. However, considering the lack of WUE indicators for the selection and an evaluation of system construction in Xinjiang, the implementation of the strictest water resources management system in this province has been seriously restricted. In order to evaluate the agricultural water utilization situation of 14 administrative regions in Xinjiang, a synthetical evaluation model is proposed combining the analytic hierarchy process method and the fuzzy evaluation method. Firstly, an evaluation system composed of the target layer (i.e., water use efficiency), the criterion layer (i.e., water use situation, engineering measure, planting structure) and the index layer (e.g., utilization coefficient of irrigation water, weighting irrigation quota, grain production per cubic meter of irrigation water, etc.) is constructed. Secondly, a classification standard of evaluation indicators is put forward and a fuzzy evaluation model is introduced into calculate agricultural WUE. Finally, key evaluation indicators that lead to these administrative regions with very low WUE are identified, and discussions on improving agricultural WUE in Kashgar are made. The evaluation results of this study are beneficial for providing support for reforming agricultural water use and promoting sustainable agricultural development in Xinjiang.

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