| Comprehensive evaluation of water and nitrogen utilization of waxy corn based on entropy weight TOPSIS model under different water and fertilizer treatments |
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| DOI：10.7606/j.issn.1000-7601.2020.04.14 |
| Key Words: waxy corn fertilization methods irrigation methods water and nitrogen utilization entropy weight TOPSIS evaluation |
| Author Name | Affiliation | | LI Ruofan | Taiyuan University of Technology, Taiyuan, Shanxi 030024, China | | MA Juanjuan | Taiyuan University of Technology, Taiyuan, Shanxi 030024, China | | SUN Xihuan | Taiyuan University of Technology, Taiyuan, Shanxi 030024, China
Jinzhong University, Jinzhong, Shanxi 030600, China | | GUO Xianghong | Taiyuan University of Technology, Taiyuan, Shanxi 030024, China | | DUAN Yong | Taiyuan University of Technology, Taiyuan, Shanxi 030024, China | | REN Qing | Taiyuan University of Technology, Taiyuan, Shanxi 030024, China |
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| Abstract: |
| In order to explore the effects of different fertilization methods, irrigation amount, and irrigation times on plant height, leaf area index, yield and quality, water and nitrogen (N) utilization rate of waxy corn in different growth stages,Jinnuo 41 was used as material for a field experiment, two irrigation methods: I0(sowing time: 75%θf~85%θf; seedling stage\|prophase of jointing: 65%θf~75%θf; anaphase of jointing\|booting stage: 70%θf~80%θf; booting stage\|flowering stage: 70%θf~80%θf）; I1(sowing time: 75%θf~85%θf; anaphase of jointing\|booting stage: 70%θf~80%θf）， three fertilization methods: F0 (N, P, K base application), F1 (N, K base application 30% + jointing stage 30% topdressing + bellmouth stage topdressing 40%, P base application)， and F2 (N, K base application 30% + bellmouth stage topdressing 70%, P base application) were used. The results showed that compared with F0, F1， and F2 increased plant height by 2.86%~4.29%, leaf area index by 6.47%~11.61%, fresh ear yield by 0.63%~8.42%, water use efficiency by 6.41%~21.34%, irrigation water use efficiency by 1.94%~21.88%, and agricultural efficiency of nitrogen fertilizer by 10.02%~19.80%. The effect of I1was more significant. Compared with I1, I0 increased fresh ear yield in F0, F1, and F2 groups by 13.57%, 5.54%, and 8.59%, and increased grain yield by 16.14%, 2.77%, and 6.49%, respectively. Compared with I0, I1 reduced irrigation amount by 29.55%, 37.02%, and 25.20%, reduced soil water consumption by 20.82%, 22.01%, and 13.44%, and increased the water use efficiency by 11.50%, 33.31%, 17.57%, increase water use efficiency by 4.09%, 18.69%, and 6.51% for F0, F1, and F2 groups, respectively. Therefore, F1I0 treatment was the best water and fertilizer management scheme in this experiment. |
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