|
|
|
| Effect of ecological cultivation pattern on water footprint of paddy field |
| LI Xuechun, CHEN Dan*, WANG Linlin, MA Yu, YE Zhihao, WU Songwei, LIANG Yifan |
| College of Agricultural Science and Engineering, Hohai University, Nanjing, Jiangsu 210098, China |
|
|
|
|
Abstract A water footprint accounting method for the rice-crayfish coculture field, located in Lianshui County of Huai′an City, Jiangsu Province was developed. An integrated view between the water consumption patterns and the blue, green and grey water footprints for the different cultivation patterns at different stages were provided. The results show that there are differences in the irrigation quota, unit production water footprint and the compositions of rice under different patterns. The irrigation quota for the rice-shrimp ecological cultivation is 24 922.95 m3/ha, which is 5.75 times for the traditional rice cultivation. The water footprint of rice production is 19.9 m3/kg for the former, much higher than 11.9 m3/kg for the latter. The green water footprint is the highest in the compositions of production water footprint for the traditional rice. For the rice-shrimp ecological cultivation, the gray water footprint is the highest, far higher than the green and blue water footprint. From the perspective of water footprint, the water use efficiency for the rice-shrimp ecological cultivation in the study areas can be improved though water-saving and emission reduction strategies.
|
|
Received: 28 May 2021
|
|
|
|
|
|
|
