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《Journal of Soil and Water Conservation》 2017-04
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Effect of Organic Carbon Fertilizer on Fertilizer Utilization Rate and Root Morphology of Four Plants

CHEN Chuan;SUN Baoping;ZHANG Jianfeng;SHEN Haojie;CHEN Yichao;College of Soil and Water Conservation,Beijing Forestry University;  
The purpose of this study was to acquire the effect of organic carbon fertilizer on biomass and root morphology,and to determine the optimum amount of organic carbon fertilizer in the arid area afforestation,therefore a pot experiment was conducted to study the effect of 6levels organic carbon fertilizer on biomass,fertilizer utilization rate,and root morphology of 4plants(Syringa oblate,Swida alba,Pinus tabuliformis,and Fraxinus chinensis).The results showed that significant differences existed in 4plants' root and total biomass among the different fertilizer application levels in the test dosage range.The 4plants' total biomass increased by 22.41%~82.94%,42.22%~112.96%,10.60%~55.59%,and 9.46%~42.61% compared with the control groups,and the maximum value were at level T4(20g/strain),T3(15g/strain),T5(30g/strain),T5(30g/strain).With the increase of organic carbon fertilizer application,the fertilizer utilization efficiency of 4plants decreased by 0.903kg/kg,1.946kg/kg,0.037kg/kg,0.145kg/kg.The influence of fertilizer on root morphological characteristics(root length,surface area,average diameter,tips,crossings)of S.oblate and S.alba all reached a significant level.Average root diameters of Pinus tabuliformis and Fraxinus chinensis were less affected by fertilizer application,but the other four characteristics showed significant differences under different amount of fertilizer application.Compared with the control groups,longest root length of 4plants increased by 41.29%~112.77%,the maximum root surface area increased by34.73% ~154.26%,the maximum average diameter increased by 3.85% ~42.62%,the maximum tips increased by 47.41% ~70.15%,the maximum crossings increased by 22.93% ~109.10%.The results showed that the shrub was more sensitive to fertilizer than the tree,but the tree performed better than theshrub at high level fertilizer utilization.The fertilizer utilization for tree should be higher,30g/strain for instance,and for shrub shouldn't be more than 20g/strain in the arid area afforestation.
【Fund】: 河北省张家口地区干旱造林保水材料试验研究项目(2014HXFWSBXY025)
【CateGory Index】: S725.5
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