Nutrient and planting modes strategies improves water use efficiency, grain-filling and hormonal changes of maize in semi-arid regions of China

2019 ◽  
Vol 223 ◽  
pp. 105723 ◽  
Author(s):  
Yang Li ◽  
Liye Yang ◽  
Hao Wang ◽  
Ranran Xu ◽  
Shenghua Chang ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Arid Regions ◽  
Grain Filling ◽  
Hormonal Changes ◽  
Use Efficiency ◽  
Semi Arid

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.

Improving Water Use Efficiency in Semi-Arid Regions through Integrated Aquaculture/Agriculture

2011 ◽  
Vol 23 (3) ◽  
pp. 212-230 ◽  
Author(s):  
Sami Abdul-Rahman ◽  
I. Patrick Saoud ◽  
Mohammed K. Owaied ◽  
Hanafy Holail ◽  
Nadim Farajalla ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Arid Regions ◽  
Integrated Aquaculture ◽  
Use Efficiency ◽  
Semi Arid

Rainwater-Harvesting Agriculture and Water-Use Efficiency in Semi-Arid Regions in Gansu Province, China

2005 ◽  
Vol 34 (3) ◽  
pp. 159-165 ◽  
Author(s):  
Famin Liu ◽  
Yanqing Wu ◽  
glang Xiao ◽  
Qianzhao Gao
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Arid Regions ◽  
Rainwater Harvesting ◽  
Agricultural Productivity ◽  
Gansu Province ◽  
Theory And Practice ◽  
Annual Rainfall ◽  
Use Efficiency ◽  
Semi Arid

In arid and semi-arid ecosystems, the efficient use of water becomes increasingly important because water is a crucial limiting factor for increased food and fibre production to supply an ever growing number of people. Rainwater harvesting agriculture (RHA) is a system that has the potential to deal with the water constraints that farmers in China's semi-arid regions face. RHA can supply limited irrigation at the key stages of crop development by using rainwater stored in containers such as tanks or cellars. A number of tests of RHA in selected experimental sites confirm its potential for significantly increasing agricultural productivity. In test plots, average yields of maize (Zea mays) and wheat (Triticum aestivum L.) increased by over 50%. This paper reviews the development and performance of RHA, based on studies of the usefulness of rainwater for agriculture, theory and practice of RHA, improvement of crop yields and water-use efficiency (WUE) and its potential role in alleviating or eliminating poverty and land degradation in semi-arid regions of Gansu province. One concept, namely harvested rainwater-use efficiency (HWUE) is put forward, and the relationship between WUE and HWUE is analysed using schematic relationships between grain yield and evapotranspiration (ET). The value of HWUE is greater than that of WUE when the compensatory harvested rainwater is supplied at critical stages for water requirements in rainfed croplands. This is the basis of RHA theory. RHA has identified a new technical system that is characterized by the combination of terracing, plastic-film cover, varieties, fertilization, water storage in cellars or tanks and micro-irrigation for increasing dryland-farming productivity. It is suggested that RHA has great potential for enhancing water availability, reducing water loss, producing more with the same amount of annual rainfall and increasing agricultural productivity in north-west China. There is no doubt that the implementation of RHA techniques will expand, and can help local farmers to solve the problem of water shortage and to achieve self-sufficiency in grain.

scholarly journals Improving water use efficiency of vineyards in semi-arid regions. A review

2014 ◽  
Vol 35 (2) ◽  
pp. 499-517 ◽  
Author(s):  
Hipólito Medrano ◽  
Magdalena Tomás ◽  
Sebastiá Martorell ◽  
José-Mariano Escalona ◽  
Alicia Pou ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Arid Regions ◽  
Use Efficiency ◽  
Semi Arid
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