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[1]ZHANG Zhi-chun,PAN Gen-xin,ZHANG Jin-jing,et al.Features on the Humin Composition in Xialaxiu Profile[J].Research of Soil and Water Conservation,2013,20(03):295-298,304.

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Features on the Humin Composition in Xialaxiu Profile

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 03 Page number: 295-298,304 Column: Public date: 2013-06-28

Title:: Features on the Humin Composition in Xialaxiu Profile

Author(s):: ZHANG Zhi-chun^1,2, PAN Gen-xin¹, ZHANG Jin-jing³, Xin Yan-jun², TAO Shi-yin², YUAN Yan-de², WANG Min²; 1. Institute of Resources, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, China;
2. Qinghai Provincial Center for Lightning Disaster Prevention, Xi’ning 810001, China;
3. College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China

Keywords:: source area of three river; profile of deposition; humin composition; optical property

CLC:: S153.6⁺22

DOI:: -

Abstract:: HM was divided into iron-linked humin(HMi),clay-linked humin(HMc) and insoluble humin residue(HMr) by humus composition modification method & modified Pallo method, which was defined as humin composition. HMi/HMc and (HMi+HMc)/HM were regarded as the index of humin composition. Results showed that contents of humin fractions, HMi/HMc, (HMi+HMc)/HM, E4/E6 and △lgK in different layers were different; the HMr contents in majority of layers aret high, HMr to the maximum and minimum values appeared in the profiles of the upper and lower ends; (HMi+HMc)/ HM ranged from 0.20±0.05 to 0.60±0.03. soluble HM component was lower than the insoluble fractions in most layers; HMi/HMc fluctuations were within (5.42±0.34)~(0.46±0.03) and those parameters in 5 layers were greater than 1; in addition to the O layer, each layer of the E4/E6 always behaved as HMc > HMi, but △lgK situation was more complex, not always behaved as HMc > Hmi; The structure of the HMi & HMc in grass-growing layer was simple compared to other layers.

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