| Cite this article: | 高晓丽,马娟娟,贾雨蕊,等.晋北谷子耗水规律和水分高效利用研究[J].灌溉排水学报,0,():-. |
| GAO Xiao-li,Ma Juan-juan,Jia Yu-rui,et al.晋北谷子耗水规律和水分高效利用研究[J].灌溉排水学报,0,():-. |
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| Study on Water Consumption Law and Water High-Use Efficiency Utilization of Millet in the North Region of Shanxi Province |
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GAO Xiao-li1, Ma Juan-juan2, Jia Yu-rui2, Liu En-ke1, SONG Lu-lu2
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1.Dryland Agriculture Research Center of Shanxi Academy of Agricultural Sciences,Taiyuan;2.College of Water Resources Science and Engineering Taiyuan University of Technology,Taiyuan
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| Abstract: |
| Due to the unique and strong tolerance against drought, millet is considered as an important crop to make full use of climate resources, optimize crop planting structure and develop water-saving agriculture in Shanxi Province. However, the less rainfall in millet planting areas lead to the plant method of rain-fed. The yield of millet is greatly affected by soil water deficit. The serious yield reduction of millet occurs especially in dry years. There are few systematic studies on the effects of different degrees of water deficit at different growth stages on water consumption and water production efficiency of millet. Therefore, it has a great guiding significance to clarify the water consumption law and characteristics of millet for realizing water saving and high yield of agriculture in the north region of Shanxi.【Objective】To illustrate the water consumption law and the mode of water saving and high yield of millet in the north region of Shanxi.【Method】The millet irrigation experiment with Jingu-53 were conducted. The irrigation experiment were set with mild, moderate, and moderate water stress at more sensitive stage of jointing stage, heading stage and filling stage, respectively. The lower irrigation limits at the jointing stage were 64.2%(W1、W2、W3)、50.9%(W4、W5、W6) and 40.0%(W7、W8、W9) of soil field capacity, respectively. The lower irrigation limits at the heading stage were 73.6%(W1、W4、W7)、62.3% (W2、W5、W8)and 50.9% (W3、W6、W9)of soil field capacity, respectively. The lower irrigation limits at the filling stage were 68.0%(W1、W6、W8)、57.0%(W2、W4、W9) and 45.0%(W3、W5、W7) of soil field capacity, respectively. The upper limit of irrigation for the three stages were 90.0% of soil field capacity. The water consumption law and water production efficiency of millet with different water deficit models were studied. 【Result】(1) The water consumption amount during the whole growth period of millet under different water deficit treatments ranged from 177.96 to 454.87 mm. The water consumption amount and water consumption modulus at each growing stage were in sequence of jointing stage / heading stage > seedling stage > filling stage > mature period, which increased at the first and then decreased. And the water requirement intensity obeyed the law of heading stage > joining stage > filling stage > mature period > seedling stage. (2) The crop coefficient of millet for irrigation treatments with higher water use efficiency were between 0.65 and 0.78. The crop coefficients of W4 treatment with the highest water productivity under moderate water stress at the seedling stage, jointing stage, heading stage, filling stage and mature period were 0.27, 0.68, 2.10, 0.51 and 0.42, respectively. (3) Water sensitivity index of millet at different growth stages were heading stage, followed by jointing stage and then filling stage. The water productivity of millet reached up to 1.56～1.57 kg/m3 under combination of moderate water stress at the jointing and slight water stress at the heading stages. 【Conclusion】To ensure higher water use efficiency of millet, proper supplementary irrigation should be carried out and the soil moisture of the millet field need more than 50.9% of soil field capacity during the jointing period in the north region of Shanxi. |
| Key words: millet; water deficit; water consumption; crop coefficient; water use efficiency (WUE); water sensitivity index. |
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