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| Losses of Water Soluble Organic Carbon and Nitrogen in Soils Under Phyllostachys praecox Stands with Different Fertilization |
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| KeyWord:water soluble organic carbon; water soluble organic nitrogen; loss; Phyllostachys praecox |
| Author Name | Affiliation | | WU Jia-sen | College of Forest Resources and Environment,Nanjing Forestry University,Nanjing 210037,China
School of Environmental and Resource Sciences, Zhejiang A & F University, Lin′an 311300, China | | XU Kai-ping | Zhejiang Institute of Hydraulics and Estuary，Hangzhou 310020, China | | YE Jing | School of Environmental and Resource Sciences, Zhejiang A & F University, Lin′an 311300, China | | JIANG Pei-kun | School of Environmental and Resource Sciences, Zhejiang A & F University, Lin′an 311300, China | | LI Yong-fu | School of Environmental and Resource Sciences, Zhejiang A & F University, Lin′an 311300, China | | ZHANG Jin-chi | College of Forest Resources and Environment,Nanjing Forestry University,Nanjing 210037,China |
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| Abstract: |
| Soil water soluble organic matter（WSOM） was one of the major sources of pollution to waterways in the production region of Phyllostachy praecox stands where excessive chemical fertilizers and heavy winter mulch were applied.Losses of water soluble organic carbon（WSOC） and water soluble organic nitrogen（WSON） in Phyllostachys praecox stands with different fertilization treatments, including the control（CK, no fertilizer treatment）, conventional fertilizer（CF）, decreased inorganic fertilizer（DF）, and microbial fertilizer（MF）, were investigated using a field runoff and soil filtration collecting device in 2011.Amounts of soil surface runoff and water leakage were significantly correlated with rainfall（P<0.01）. Losses of WSOC and WSON were mainly caused by leaching, which accounted for 97% and 94% of the total losses, respectively.During the experiment period, the loss of WSOC was in order of CF（66.66 kg·hm-2）>MF（63.66 kg·hm-2）>DF（61.06 kg·hm-2）>CK（56.58 kg·hm-2）, and that of WSON was CF（37.48 kg·hm-2）>DF（24.40 kg·hm-2）>MF（21.41 kg·hm-2）>CK（17.38 kg·hm-2）. Compared with the conventional fertilizer treatment, microbial fertilizer and 40% nitrogen reduction decreased WSOC loss by 4.5% and 8.4%, and WSON loss by 42.9% and 34.9%, respectively. Losses of WSON in the surface runoff and leachate accounted for 49.2%~52.7% and 26.6%~35.9% of total N loss, respectively. |
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