The effects of drip irrigation quota on the root distribution characteristics and grain yield of spring corn
MA Jinping, WANG Weifeng, ZHU Baocai, WANG Shuangxi
1. College of Forestry, Shanxi Agricultural University, 030801, Taigu, Shanxi, China;
2. College of Engineering, Shanxi Agricultural University, 030801, Taigu, Shanxi, China
Abstract：[Background] The Loess Plateau is drought and water shortage. There are many researches on water-saving effect of drip irrigation with mulch, which could accurately irrigate plants. However, the effect of mulched drip irrigation on root and yield of spring corn is very few.[Methods] The randomized block experiment was conducted for 2 years in Taigu, Shanxi. The irrigation quota treatments were set up to 0, 8, 12, 16, and 20 mm respectively. The effects of different irrigation quota on the root distribution parameters of the soil depth from 0 to 100 cm and grain yield were studied. The sampling of root distribution included integral excavation and stratified, WinRHIZO analyzed the distribution parameters of root system, and the grain yield was dried by air. Data were processed by Microsoft Excel 2007,SPSS 20.0 software for significance test and Pearson correlation analysis. SigmaPlot 12.5 was plotted.[Results] The distribution characteristic parameters of the whole root system increased with the increase of the irrigation quota, and reached the maximum in the irrigation 20 mm. The root length, the root surface area, the root tip number and the root dry weight were very significant, and the root volume and root diameter were significant. The vertical distribution of root length in the 10-20 cm soil layer was the largest, account for 47.29%-60.28% and 48.29%-62.30% in 2016 and 2017, respectively. The root dry weight distribution in the 0-20 cm soil layer was the heaviest, account for 72.03%-85.48% and 71.50%-84.97% in 2016 and 2017, respectively. The grain yield increased with the irrigation quota increasing, but there was no obvious difference in treatment irrigation quota of 16 mm and 20 mm.[Conclusions] The plastic mulching drip irrigation measures obviously promote the root growth of the soil surface soil and grain yield. The best irrigation quota of mulched drip irrigation in the central area of Shanxi is recommended to be 16 mm.
马金平1, 王卫锋1, 朱宝才1, 王双喜2. 灌水定额对覆膜滴灌玉米根系分布和籽粒产量的影响[J]. 中国水土保持科学, 2018, 16(6): 64-70.
MA Jinping, WANG Weifeng, ZHU Baocai, WANG Shuangxi. The effects of drip irrigation quota on the root distribution characteristics and grain yield of spring corn. SSWC, 2018, 16(6): 64-70.
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2018, Vol. 16 
