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| DOI：10.13522/j.cnki.ggps.20180556 |
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| The Use of Sprinkler Irrigation Water by Soybean and Its Consequence for Plant Growth in the Regions of Hulunbeier |
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YAN Zeyu, SHI Haibin, YANG Shuqing, WANG Zuokui, WANG Meirong
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1.College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China; 2. Arong Qi Water Authority, Hulun Buir 162750, China
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| Abstract: |
| 【Objective】 Designing irrigation schedule needs to consider irrigation water use efficiency. In this paper, we present the results of an experimental study on use of sprinkler irrigation water by soybean and the consequence for its growth.【Method】The experiment was conducted at Hulunbeier and the variety of “Xinmi Pod King 738” Glycine max (Linn.) Merr was used as the model plant. We considered four irrigation amounts: 75mm (P1), 85 mm (P2), 95 mm (P3) and 105 mm (P4), with no irrigation as the control (CK). In each treatment, we measured the biomass, yield and yield components, as well as water consumption and water use efficiency of the crop in different growing stages.【Result】 Irrigation promoted plant growth and leaf area, which were sensitive to water stress during pod-forming stage. Compared to CK, irrigation increased plant height by 3.8%～14.1% and leaf area index by 2.4%～16.7%; and it also increased 100-grain weight and the number of pods per plant. In particular, P2 increased the number of pods per plant and 100-grain by 37.2% and 11.1% respectively, and P4 increased by 21.9% and 6.6%, respectively, compared to CK. P1, P2, P3 and P4 increased yield by 9.9%, 21.9%, 20.8% and 16.9% respectively, compared to CK. The water consumption by crop in the whole growing season was between 326.7 and 435.8 mm, increasing with irrigation amount. The water consumption varied during growing stage, with pod-forming and drum-grain stages consuming more water than other stages, accounting for more than 48.6% of overall water usage. The average daily water consumption during different stages was ranked in podding stage > filling stage > flowering stage > maturity stage > branching stage > seedling stage. WUE of P1-P4 increased by 17.4%, 27.5%, 20.3% and 10.1% respectively, compared to that of CK. 【Conclusion】The effect of irrigation amount on water consumption and water use efficiency was manifest in our experiment, with P2 most efficient in all aspects, which can saved water and improved yield. |
| Key words: sprinkler irrigation; Glycine max (Linn.) Merr; water consumption; yield; water use efficiency |
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