| Cite this article: | 李白玉.土壤增温对冬小麦生长特性、产量及耗水量的影响[J].灌溉排水学报,0,():-. |
| Li Baiyu.土壤增温对冬小麦生长特性、产量及耗水量的影响[J].灌溉排水学报,0,():-. |
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ZHANG Caiying, DU Ruiqing, WANG Yan. Effect of season and temperature on treatment of subsurface flow constructed wetland[J]. 2016, 10(4): 1706-1712.
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Li Baiyu
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Qingdao Institute of Technology
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| Abstract: |
| 【Objective】The objective is to explore the effect of soil warming on the development and yield of winter wheat under the climate warming trend.【Method】The experiment were conducted at the Shangqiu Comprehensive Experimental Station of the Chinese Academy of Agricultural Sciences during 2012-2013. A heating pipeline buried 1.2 m depth below the soil surface was used to warm the soil. The soil warming treatment was divided into four, and the horizontal distance from the heating pipeline was 0 (soil temperature increase 8 ℃, T8 ), 0.5 m (soil temperature increase 6 ℃, T6), 1.0 m (soil temperature increase 4 ℃, T4) and 1.5 m (soil temperature increase 2 ℃, T2), and one treatment of no soil warming treatment (CK). The root growth, growth characteristics, yield composition, water consumption and water use efficiency (WUE) of winter wheat under different soil warming were analyzed. 【Result】(1) The mean soil temperature of T8, T6, T4 and T2 increased by about 8.0, 6.0, 4.0 and 2.0 ℃ respectively compared with CK, and the maximum temperature increase occurred at 14:00. (2) Soil temperature increase of 2.0 ℃ (T2) is helpful for the rooting of winter wheat roots, while increase of more than 4.0 ℃ (T4) will affect root growth. The root system of winter wheat is mainly concentrated in 0~40 cm soil depth, root length density are accounting for more than 75% of the total from the tillering stage to the green stage. (3) Soil warming will cause the winter wheat height and leaf area index (LAI) to increase rapidly after the greening period, but premature aging appeared in the later period. The greater the temperature increase, the more serious the premature aging phenomenon, which directly affects the yield composition of winter wheat. (4) The yield, biological yield, number of spikes, number of spikes per spike, and 1000-grain weight of T2 were significantly higher than those of other treatments, and soil warming increase over 4.0 ℃ would significantly affect the yield composition of winter wheat. (5) Different soil warming gradients have different effects on the water consumption (ET) and water use efficiency (WUE) of winter wheat. The performance of ET is: T2>CK>T4> T6> T8, and the performance of WUE is: T2> T4>CK> T6> T8, but the ET and WUE of CK are not significantly different from T4. 【Conclusion】At present, suitable soil temperature increase (2.0 ℃) for northern winter wheat cultivars from overwintering to greening is beneficial to the formation of later yield and the increase of WUE. |
| Key words: soil temperature; root distribution; yield composition; grain filling rate; water use efficiency |
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