| Optimization simulation of AquaCrop based on the compensatory effect under palstic mulching |
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| DOI：10.7606/j.issn.1000-7601.2021.06.13 |
| Key Words: plastic mulching accumulated temperature compensatory effect soil temperature AquaCrop model winter wheat summer maize |
| Author Name | Affiliation | | DING Dianyuan | College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China
Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China | | XU Zhipeng | College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | | CHEN Feiyu | College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | | DONG Wenjun | Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHONG Zhicheng | College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | | PENG Jiawen | College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | | JIANG Shijie | College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | | MU Kui | College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | | YAN Huimin | College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | | WANG Naijiang | Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZOU Yufeng | Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China | | FENG Hao | Institute of Water and Soil Conservation Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
Institute of Water Saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Based on the winter wheat-summer maize rotation experiment from 2013 to 2018, this paper explored compensatory effect characteristics during the winter wheat and summer maize growing season, estimated the range of compensatory coefficient in southern Loess Plateau, and examined advantages and disadvantages of two methods for the compensatory effect using the AquaCrop model. The first method used model’s own parameters and the second method coupled the compensatory coefficient with the AquaCrop model. The results showed that the plastic mulching increased the soil temperature from sowing to overwintering, and the increase in soil temperature gradually disappeared and the decrease in soil temperature started from regreening during the winter wheat growing season. Soil temperature increase under plastic film mulching was found during the whole summer maize growing season. Thus, the compensatory effect had a threshold time around late overwintering period. The average value of compensatory coefficient was 1.08 from sowing to seeding stage and was 0.54 from seeding to overwintering stage for winter wheat. For summer maize, the average value of compensatory coefficient was 0.81 from sowing to seeding stage and 0.63 from seeding to tasseling stage. The results indicated that the compensatory effect was more obvious during the early growth stage of crops, and the increase in soil temperature significantly accelerated crop growth. For the AquaCrop model, compared with method 1, method 2 showed some advantages in simulating canopy coverage, aboveground biomass, crop yield, and soil water storage and better explaining how plastic film mulching affecting crop development in winter wheat\|summer maize rotation system based the compensatory effect. |
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