[1]YAN Peng,CUI Hongyan,FANG Zisen,et al.Effects of Supplemental Irrigation on Soil Moisture and Grain Yield of Linum usitatissimum Linn[J].Research of Soil and Water Conservation,2017,24(01):328-333,341.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 01
Page number:
328-333,341
Column:
Public date:
2017-02-28
- Title:
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Effects of Supplemental Irrigation on Soil Moisture and Grain Yield of Linum usitatissimum Linn
- Author(s):
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YAN Peng1,2, CUI Hongyan1,2, FANG Zisen1,2, NIU Junyi1,2, GAO Yuhong1,2
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1. College of Agronomy, Gansu Agricultural University, Lanzhou 730070, China;
2. Gansu Province Key Laboratory of Arid land Crop Science, Lanzhou 730070, China
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- Keywords:
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Linum usitatissimum Linn; irrigation; soil moisture; grain yield
- CLC:
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S274;S563.2;S152.7
- DOI:
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- Abstract:
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In order to investigate the soil moisture dynamic characteristic and yield-increasing effect under different irrigation conditions, field experiment was carried out to elucidate the effect of different irrigation modes on soil moisture, grain yield and water use efficiency of oil flax which was ‘Longyaza 1’. The experiment had five treatments: no irrigation during the whole growth season (represented as CK); irrigation amount was 80 mm at stem stage (T1); irrigation began at stem and full flowering stages, and irrigation amounts were 60 mm and 40 mm (T2), 80 mm and 40 mm (T3), respectively; irrigation was carried out at stem, squaring and full flowering stages, and irrigation amounts were also 60 mm, 40 mm and 40 mm (T4). The results showed that irrigation at stem stage and no irrigation at squaring stage were beneficial to the increase of 80—140 cm soil moisture. Moreover, T2 treatment increased 120—140 cm soil water storage at full flowering stage and enhanced by 11.40% and 11.08% compared with T3 and T4, suggesting that T2 treatment had an obvious promoting effect on the improvement of deep soil moisture during this period. The water content in topsoil layer at harvest decreased while the soil moisture in 100—200 cm layer obviously enhanced with the increase of irrigation amount in full flowering stage, but also could boost the invalid water in the soil. Generally, the total water consumption raised and the proportion of soil water consumption amount and precipitation to total water consumption amount reduced with the increase of irrigation amount. Therefore, reducing irrigation improved the absorption and utilization of soil storage water and decreased the total water consumption, which resulted in much more availably increase of irrigation water use efficiency. In addition, the yield and water use efficiency of T2 treatment significantly increased by 36.50% and 12.27% compared with T0, respectively. As far as water-saving and high-yield were concerned in the experiment, T2 has the distinct water-saving and yield-increasing benefits.