| Experimental study on the effect of buried depth of shallow buried drip irrigation on growth of alfalfa |
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| DOI：10.7606/j.issn.1000-7601.2018.04.22 |
| Key Words: shallow-buried drip irrigation drip belt buried depth alfalfa capillary root distribution yield |
| Author Name | Affiliation | | PAN Xiao-bao | College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China | | JIAO Xi-yun | College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
State Key Laboratory of Hydroligy-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China | | GUO Wei-hua | College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China | | CHEN Jun-ke | The Yellow River Water Conservancy Press |
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| Abstract: |
| In order to study the influence of buried depth of shallow-buried drip irrigation on the growth of alfalfa and to optimize the drip belt buried depth ,a field experiment was conducted from April to October in 2016 in AWei experiment station of Aletai irrigation area in Xinjiang.By comparing the shallow buried drip irrigation with buried depths of 5 cm and 10 cm and the traditional buried drip irrigation（buried depth of 20 cm）,the data of distribution of capillary roots, growth index and yield of alfalfa under different drip belt buried depths were obtained.The result show that the capillary root volume of 20~30 cm soil layer treated with 5 cm, 10 cm and 20 cm depth of capillary tube accounted for 12.44%, 21.73% and 19.31%, respectively. The heights of 10 cm and 20 cm treated plants were 71.2 cm and 72.5 cm and the difference was small, but compared with the depth of 5 cm and of 65.8 cm is significantly different; The plant stem diameter of alfalfa of 10 cm and 20 cm treatments were 3.43 mm and 3.38 mm, but both of which are greater than 3.19 mm with a depth of 5 cm. The totalstubbles’ yields of 10 cm and 20 cm were 16.21 t·hm-2 and 15.61 t·hm-2, respectively. smaller, but the yields of both are significantly different from the 14.60 t·hm-2 yield of the buried depth of 5 cm. Therefore, the buried depth of the 10 cm treatment can achieve the same root wet irrigation effect as the traditional buried drip irrigation, and it has little effect on the growth of alfalfa, and it is more economical and convenient to optimize the buried depth of the drip belt. |
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