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| DOI：10.13522/j.cnki.ggps.20180488 |
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| Yield and Water Use efficiency of Super Rice under Pressurized Subsurface Micro-irrigation |
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LI Yun, ZHANG Licheng, YANG Jinglin, XIAO Weihua, WU Youjie
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College of Engineering, Hunan Agricultural University, Changsha 410128, China
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| Abstract: |
| 【Objective】The purpose of this paper is to study the effect of water pressure in subsurface micro-irrigation on water consumption and growth of super rice. 【Method】The experiment was conducted in pots where the emitters of the micro-irrigation system were buried in the root zone. We compared the pressurized system (WY) and standard system (CK) for their impact on growth traits of the rice. 【Result】The overall irrigation amount in the WY and CK was 17.23 kg (2.47×106 m3/hm2) and 21.5 kg (3.02×106 m3/hm2) respectively. WY increased rice tillers to 31.167, dry matter of the shoot to 92.46 g and dry matter of the root to 9.41 g, compared with their associate value of 27.083 for tillers, and 87.22 g and 8.39 g for dry matter of the shoot and the root, respectively, under CK. There was no significant difference between WY and CK in other factors, including plant height, ear length, spikelet number and the weight of 1 000 grains.【Conclusion】WY improved water utilization efficiency and promoted tillering, thereby ultimately improving the yield. |
| Key words: pressurized micro-irrigation; super rice; water consumption; agronomy characteristics |
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