| The effects of different water supplies on spring wheat spikelet traits and yield |
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| DOI：10.7606/j.issn.1000-7601.2010.03.03 |
| Key Words: water supplies spring wheat spikelet traits grain yield water use efficiency |
| Author Name | Affiliation | | CHENG Xuefeng | Department of Resources and Environment, Heze University, Heze, Shandong 274015, China | | ZHANG Fengyun | Department of Resources and Environment, Heze University, Heze, Shandong 274015, China | | CHAI Shouxi | Agronomy College, Cansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Fifteen spring wheat cultivars were selected as the test materials in the experiment. Based on winter flooding (1 800 m3 /hm2), three treatments of water supply according to growing stages were designed as follows: T1(three times of irrigation at jointing, anthesis and milky stages) , T2(two times of irrigation at jointing and anthesis stages) and T3(one time of irrigation at jointing stage). The water supply of broad irrigation was 1 050 m3/hm2 for each time, the total water supply of the three irrigation treatments were 3 150 m3 /hm2(T1), 2 100 m3/hm2(T2) and 1 050 m3/hm2(T3), respectively. The results showed that the ratio of tri-grained ear, grain number per spike, grain weight per spike, grain yield and WUE under T2 were the highest among all the treatments. The ratio of invalid ear was the highest, while the ratio of one-grained and double- grained ear, grain number per spike, grain yield and WUE were all the lowest under T3. The correlation analysis showed that the yields under the three treatments were all significantly positively correlated with WUE. Grain yield and WUE were negatively correlated with grain number per spike while significantly positively correlated with grain weight per spike under T3. Grain number spike was significantly positively correlated with grain weight perspike under T1 and T2 while there was no correlation under T3. The results above showed that moderate irrigation increased the ratio of tri-grained ear which increased grain number and grain weight per spike, and the grain yield and WUE, while water deficit decreased the grain yield and WUE as the result of the decreased ratio of one-grained and dou-ble-grained ear, the increased ratio of invalid ear, the decreased grain plumpness and grain weight per spike. |
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