Water and Radiation Use Efficiency of Japonica Rice with Different Irrigation Methods in Semi-humid Area of China
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FULL-LENGTH RESEARCH ARTICLE
Water and Radiation Use Efficiency of Japonica Rice with Different Irrigation Methods in Semi-humid Area of China Xiangyan Meng1
•
Lingyun Zhou2 • Zhongxue Zhang3 • Qiufeng Wu1
Received: 14 March 2019 / Accepted: 30 July 2019 Ó NAAS (National Academy of Agricultural Sciences) 2019
Abstract Limited freshwater resources restricted the yield of rice in the semi-humid area of Heilongjiang Province, China. To identify suitable irrigation methods for rice, the irrigation experiment was carried out at Qing’an Irrigation Experimental Center in 2018. The aim was to determine impacts between different irrigation methods and intercepted photosynthetically active radiation, aboveground dry matter, radiation use efficiency and water use efficiency. The comparison of rice irrigation methods showed that control irrigation was an optimal irrigation method. Control irrigation can get maximum water use efficiency and maximum radiation use efficiency in the semi-humid area of Heilongjiang Province. Results showed that control irrigation could be used to increase both water use efficiency and radiation use efficiency compared with wet irrigation and flood irrigation. Results also confirmed that control irrigation intercepted the most photosynthetically active radiation and accumulated the most aboveground dry matter under three irrigation methods. Our results demonstrated that control irrigation produced higher radiation use efficiency and water use efficiency with less irrigation water. Keywords Rice Water-saving irrigation Water use efficiency Radiation use efficiency
Introduction For the whole world, rice is one of the most important food crops [26]. Concretely, above 3.5 billion population depend upon rice to provide more than 20% of daily calorie [13]. Over the past decade in Asia, the demand of rice will grow by about 8–10 million tons per year [19]. Thus, this is a significant challenge due to socioeconomic changes and cultivation techniques update of rice production. Water Xiangyan Meng and Lingyun Zhou have contributed equally to this study. & Xiangyan Meng [email protected] 1
School of Science, Northeast Agricultural University, Harbin 150030, China
2
School of Engineering, Northeast Agricultural University, Harbin 150030, China
3
School of Water Conservancy and Civil Engineering, Northeast Agricultural University, Harbin 150030, China
consumption of flood-irrigated rice is 2–3 times other cereal crops at the field level, for instance, wheat and maize [2]. Moreover, the consumption of freshwater in rice production needs about 50% of all freshwater resources in China [5]. Rice production is facing a great challenge due to the shortage of freshwater resources [18]. Therefore, it is very important to develop water-saving irrigation technologies to decrease water consumption. Radiation use efficiency (RUE) and water use efficiency (WUE) are two agronomic metrics to measure the performance of irrigation methods [7]. Increasing any combination of WUE and RUE is critical to enhance
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