| Water consumption and dry matter accumulation and distribution of winter wheat under different drip irrigation amount |
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| DOI：10.7606/j.issn.1000-7601.2017.03.11 |
| Key Words: winter wheat drip irrigation amount water consumption dry matter accumulation yield WUE |
| Author Name | Affiliation | | SUN Qian-kun | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | ZHANG Jian-xin | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | ZHAO Lian-jia | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | XUE Li-hua | Grain crops Research Institute of the Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China | | DUAN Li-na | College of Agronomy, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China |
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| Abstract: |
| To research water consumption characteristics and dry matter accumulation and distribution for high yielding winter wheat in North Xinjiang, four drip irrigation amount treatments, i.e. W1(2 550, 2 325 m3·hm-2), W2(3 450, 3 000 m3·hm-2), W3(4 350, 3 675 m3·hm-2), and W4(5 250, 4 350 m3·hm-2）, were applied in 2013—2014 and 2014—2015 years. We measured the leaf area index, photosynthetic potential, dry matter accumulation, and moisture contents at 0～140 cm soil layers. The results showed that increase in drip water amount improved moisture contents mainly at the 0～60 cm soil layers, while reduced the storage consumption of 60～140 cm soil layers with a range of 225～900 m3·hm-2 from booting and filling stage. The consumption of W4 was reduced by about 50% compared with W1, from booting and maturity stages. Increase in yield was not significant when total drip water amount being above 3 675 m3·hm-2. The effect of precipitation was very small on winter wheat yield, but irrigation amount played a decisive role in the yield and WUE of winter wheat. The proposed drip water amount was 3 450～3 675 m3·hm-2 for the whole growth period of winter wheat in North Xinjiang, with a yield level of 6 737.4～8 604.1 kg·hm-2. |
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