Shang Su-Yun, Li Yong-Fu, Jiang Pei-Kun, Zhou Guo-Mo, Liu Juan, Wu Jia-Sen, Lin Lin
Nurturing Station for State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Lin' an 311300, Zhejiang, China.
Ying Yong Sheng Tai Xue Bao. 2012 Mar;23(3):659-65.
To investigate the effects of the conversion from native shrub forest (NF) to Chinese chestnut plantation (CP) on the soil carbon (C) and nitrogen (N) pools, soil samples were collected from the adjacent NF and CP in Anji County of Zhejiang Province, with their water-soluble organic C (WSOC), microbial biomass C (MBC), readily oxidizable C (ROC), water-soluble organic N (WSON), and microbial biomass N (MBN) determined. The spectral characteristics of soil organic C were also determined by using nuclear magnetic resonance (NMR) technique. After the conversion from NF to CP, the soil alkalyzable N, available phosphorus, and available potassium contents increased significantly, while the soil WSOC, MBC, ROC, WSON, and MBN were in adverse. The soil organic C in both NF and CP was dominated by alkyl C and O-alkyl C, but the proportions of O-alkyl C and carbonyl C in soil organic C decreased while the proportions of alkyl C and aromatic C as well as the alkyl C/O-alkyl C ratio and the aromaticity of soil organic C all increased significantly after the conversion from NF to CP, indicating that this conversion increased the stability of soil organic C pool significantly. In conclusion, the conversion from NF to CP and the intensive management of CP decreased the contents of soil labile C and soil N but increased the stability of soil C pool significantly.
为研究天然灌木林（NF）转变为板栗人工林（CP）对土壤碳（C）和氮（N）库的影响，从浙江省安吉县相邻的NF和CP采集土壤样本，测定其水溶性有机碳（WSOC）、微生物量碳（MBC）、易氧化碳（ROC）、水溶性有机氮（WSON）和微生物量氮（MBN）。还采用核磁共振（NMR）技术测定了土壤有机碳的光谱特征。从NF转变为CP后，土壤碱解氮、有效磷和有效钾含量显著增加，而土壤WSOC、MBC、ROC、WSON和MBN则相反。NF和CP中的土壤有机碳均以烷基碳和O-烷基碳为主，但从NF转变为CP后，土壤有机碳中O-烷基碳和羰基碳的比例降低，而烷基碳和芳香碳的比例以及土壤有机碳的烷基碳/O-烷基碳比率和芳香性均显著增加，表明这种转变显著提高了土壤有机碳库的稳定性。总之，从NF转变为CP以及CP的集约经营降低了土壤活性碳和土壤氮的含量，但显著提高了土壤碳库的稳定性。
