| Effect of drip irrigation on growth, temporal and spatial distribution of root of winter wheat |
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| DOI：10.7606/j.issn.1000-7601.2014.06.001 |
| Key Words: drip irrigation winter wheat primary root lateral roots root dry weight root length temporal and spatial distribution of root |
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| Abstract: |
| It is well recognized that the roots are much like straws through which water and minerals from the soil move upward to the shoot of the plant. Modifying the function of roots can affect the growth and yield of the aboveground parts. In this study, the influence of four drip irrigation treatment on spatiotemporal root distribution of Xindong18 and yield was investigated in Xinjiang. The four irrigation treatments were six times (W1), seven times (W2), nine times (W3), eleven times (W4) drip irrigation at post-jointing stage, and inner and outer tube were drip 30mm per times. The study aims to simulate the effect of drip irrigation on water content, dry weight of primary root and lateral root, root length, distribution of root activity and yield at 0～100 cm soil layer during post-jointing stage. Wheat cultivar Xindong 18 was used with dual-tube cultivation including a cylindrical tube concentrically located within a cylindrical plastic tube and thus formed two isolated regions. The results indicated that soil water content in layer of 0～40 cm increased with wheat growth stage and the amount of drip irrigation. Drip irrigation delayed the decay of dry weight of primary root and lateral root and its root length, increased dry weight of lateral root and its root length, and elevated the density of dry weight in primary root and lateral root, root length and root activity from booting stage to 20 days post anthesis. The yield and water use efficiency of wheat were highest with 11 times of irrigation. The growth of primary and lateral root was severely inhibited. The shallow distributed root, advanced aging of primary root, and decreased 1000-grain weight resulted in yield loss as the times and amount of drip irrigation decreased. |
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