| Simulation analysis of irrigation effect on yield and its constitute factors of dryland wheat |
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| DOI：10.7606/j.issn.1000-7601.2019.03.15 |
| Key Words: wheat yield APSIM irrigation time irrigation amount the hill-gullied region of the Loess Plateau |
| Author Name | Affiliation | | NIE Zhi-gang | College of Information Science and Technology, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | REN Xin-zhuang | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LI Guang | College of Forestry, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LUO Cui-ping | College of Information Science and Technology, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | DONG Li-xia | College of Information Science and Technology, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WANG Jun | College of Information Science and Technology, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LU Yu-lan | College of Information Science and Technology, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In order to reveal the influence of irrigation time and amount on yield and its constituent factors of wheat in the hill-gullied region of the Loess Plateau, using the field experimental data in Anjiagou village, Fengxiang town, Anding district of Dingxi in 2016 and the meteorological data in Anding district of Dingxi from 1971 to 2016 with APSIM(Agricultural Production Systems Simulator) platform, the growth process of wheat were dynamically simulated under different irrigation treatments and the effect of each irrigation treatment were analyzed. The results showed that the water requirements of wheat during whole growth period was 315.25 mm. The water requirements for different growth stages were different that was 21.13 mm from sowing to seeding, 26.60 mm from seeding to tillering, 33.27 mm from tillering to jointing, 77.17 mm from jointing to booting, 69.31 mm from booting to flowering, 36.19 mm from flowering to filling, and 51.58 mm from filling to maturation. To improve yield, the best irrigation stage should be from sowing to jointing, and the irrigation amount should not be more than 60mm. Irrigation treatment at each growing stage before flowering significantly increased the grain number per unit area, among which it was most obvious from tillering to jointing (TS). The irrigation amount from jointing to booting (JS) and booting to flowering (BS) should not exceed 80 mm and 20 mm, respectively. The optimum irrigation treatment for increasing grain weight was from flowering to filling (FS) and the irrigation amount was 40 mm. |
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