| Research on drip irrigation schedule for spring wheat based on soil moisture-controlled irrigation |
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| DOI：10.7606/j.issn.1000-7601.2014.06.003 |
| Key Words: spring wheat drip irrigation photosynthetic characteristics dry matter distribution grain yield water use efficiency |
| Author Name | Affiliation | | WANG Guo-dong1,2, ZENG Sheng-he1,2, ZHOU Jian-wei1,2, CHEN Yun1,2, LIANG Fei1, ZHANG Lei1 | (1.新疆农垦科学院农田水利与土壤肥料研究所
2.农业部作物高效用水石河子科学观测实验站, 新疆, 石河子, 832000) |
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| Abstract: |
| In order to optimize the drip irrigation schedule of spring wheat (Triticum aestivum L.) in oasis region of northern Xinjiang, by using the soil moisture-controlled irrigation method, has researched the influences of different irrigation volums to the photosynthetic characteristics, dry matter distribution and water use efficiency. The results showed that: In the jointing and anthesis stage, the plant height, dry matter accumulation amount and leaf area index of wheat were significantly rised with increasing irrigation water volume (P<0.05). During the wheat flag leaf stage, the net photosynthetic rate (Pn), stomatal conductance (Gs), and the transpiration rate (Tr) were significantly rised with increasing irrigation water volume (P<0.05). However, variation trend of intercellular CO2 concentration (Ci) was contrary to Pn, Tr and Gs. Excessive irrigation (T5) led to Gs decline in each growth stage. In mature stage, the Pn and Tr were significantly decreased (P<0.05). Deficit irrigation(T1), the peak value of Pn was advanced to booting stage, the water use efficiency(WUE) total was the lowest in each growing stage, while the stomatic limitation(LS) was the highest. Dry matter allocation to grain, pre-anthesis assimilation translocation rate and the contribution to grain was siginificantly decreased with the increasing soil moisture and irrigation water volume(P<0.05). Two curve fitting shown that when the irrigation volume was 371 mm, the high grain yield 7 450 kg·hm-2 can be obtained. It was the best irrigation interval about 7 days for spring wheat in this region. |
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