| Effects of plastic mulching on root growth and yield of winter wheat under different sowing dates |
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| DOI：10.7606/j.issn.1000-7601.2021.06.15 |
| Key Words: film mulching late sowing winter wheat root yield water use efficiency |
| Author Name | Affiliation | | CHEN Ziwei | College of Water Resources and Architectural Engineering, Northwest A＆F University, Yangling, Shaanxi 712100, China | | DING Dianyuan | College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | | DONG Wenjun | College of Water Resources and Architectural Engineering, Northwest A＆F University, Yangling, Shaanxi 712100, China | | WANG Naijiang | College of Water Resources and Architectural Engineering, Northwest A＆F University, Yangling, Shaanxi 712100, China | | LI Yue | College of Water Resources and Architectural Engineering, Northwest A＆F University, Yangling, Shaanxi 712100, China | | FENG Hao | College of Water Resources and Architectural Engineering, Northwest A＆F University, Yangling, Shaanxi 712100, China
Institute of Water and Soil Conservation, Chinese Academy of Sciences and Ministry ofWater Resources, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In order to explore the effects of film mulching on the growth of root system and yield of winter wheat, in this study, during the whole growth period of winter wheat in 2017-2018 and 2018-2019, two planting modes (CK: uncovered hole sowing, PM: full film hole sowing) and three sowing dates (0: traditional sowing date; 10: 10 days for late sowing; 20: 20 days for late sowing) to analyze the effects of film mulching on the growth of aboveground system and root system at different growth stages, yield and its composition as well as water use efficiency of winter wheat under different treatment. The results showed that after greening period of the two seasons of winter wheat, the mulching measures effectively increased root length density (RLD), root surface area density (RSD), root biomass, and above\|ground biomass. Among the different growth periods, RLD, RSD, root biomass, and above\|ground biomass of PM0 treatment was the largest. Film mulching could accelerate the growth of the root system of late sowing winter wheat, making the average RLD, RSD and root biomass of PM10 treatments increased by 2.90%, 13.63% and 23.04% than CK0 treatment of winter wheat during the greening period, respectively. Compared with CK0 treatment, the average above\|ground biomass of PM0, PM10 and PM20 treatments in the two seasons of winter wheat during the filling period increased significantly by 65.63%, 75.57% and 54.71% (P<0.05), respectively. The average yield and water use efficiency in the two seasons of winter wheat of mulching measures were higher than those without mulching at the same sowing period, respectively. Compared with CK0 treatment, the average yield of PM0 and PM10 in the two seasons of winter wheat increased by 28.92% and 14.35%, and the water use efficiency was increased by 17.87% and 7.90%. In addition, the study also found the total RLD in the greening period, flowering period, and filling period of winter wheat all had strong positive correlations with the spike number, yield, and water use efficiency (P<0.01); the total RSD, root biomass in the greening period all had strong positive correlations with the spike number, yield, and water use efficiency (P<0.01). In summary, film mulching can improve environment of the soil to accelerate and promote the growth and development of winter wheat root system, thus improves the absorption of water and nutrients by the winter wheat root system, increases the stress resistance of winter wheat plants. |
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