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《Pratacultural Science》 2017-12
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Vertical distribution characteristics of Miscanthus sinensis roots and its relationship to soil nutrients in the Wugong Mountains

Hou Xiao-juan;Li Zhi;Cui Cheng;Li Kai;Yu Fei;Yuan Ying-dan;Guo Xiao-min;Niu De-kui;College of Landscape Architecture and Art,Jiangxi Agricultural University;  
Roots are structures that connect vegetation to the soil.Studies of the relationship between roots and soil help understand the biochemical cycle of nutrient elements and provides a theoretical basis for vegetation restoration.In the present study,soil nutrients were studied by normal analysis methods using Miscanthus sinensis Anderss as a model plant from the Wugong Mountains.Root parameters were determined by a root scanner.Correlation analysis and regression analysis were performed to examine the relationship between soil and roots.The results demonstrated that root parameters decreased with an increase in soil depth.Approximately 80% of the roots were distributed in the 0 to 16 cm soil layer.Power functions were fitted between different soil layers and root parameters(biomass density,root length density,and root surface area density),and were y=238 x-1.555 9(R2=0.891 14),y=169.9 x-0.882 05(R2=0.408 36)and y=22.397 x-0.926 14(R2=0.364 57),respectively.The content of soil organic matter,total N,total P,available P,and available K decreased with depth of soil in the 0 to 40 cm soil layer whereas the content of total K and available N fluctuated slightly.Correlations between soil nutrients and root parameters differed among nutrients,whereas organic matter,total N,and total K correlated positively with root parameters(P0.05).Therefore,fertilizing effectively in the top soil surface layer is beneficial for root development and nutrient uptake.
【Fund】: 国家自然科学基金项目(31360177);; 国家科技支撑计划项目(2012BAC11B06);; 江西省研究生创新专项资金项目(YC2016-B038)
【CateGory Index】: Q948
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