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《Acta Agrestia Sinica》 2017-04
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Effects of Nitric Oxide and Mowing Heights on Root Morphological Characteristics of Tall Fescue

MA Yan-fang;ZHANG Xu-hu;MENG Wen-wen;CHAI Rui;QI Yan-wen;XU Yue-fei;Department of Grassland Science,College of Animal Science and Technology,Northwest A&F University;  
Mowing is important to maintain the quality of the turf.In this study,the nitric oxide(NO)was added and root automatic scan was used to measure the root morphology of different mowing heights(7,5,3,1 and 0 cm)of tall fescue.The results showed that mowing significantly reduced the total length,surface area,volume,average diameter,tips root,forks and crossings of root of tall fescue roots compared to the control(P0.05).The total length,surface area,average diameter,and the volume increased to maximum,and then decreased.And the crossings of roots,forks and tips of roots of tall fescue decreased with reduction of mowing height.However,the application of exogenous NO significantly promoted root growth under different mowing heights.The beneficial effect of nitric oxide on root growth was further improved with increment of mowing height.In conclusion,the exogenous NO play an important role in regulating the tall fescue root growth at different mowing heights.
【Fund】: 国家自然科学基金项目(31402129);; 陕西省自然科学基础研究计划项目(2016JM3025)资助
【CateGory Index】: S688.4
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