Jiang Yu-mei, Chen Cheng-long, Xu Zhi-hong, Liu Yuan-qiu, Ouyang Jing, Wang Fang
College of Forestry, Jiangxi Agricultural University, Nanchang 330000, China.
Ying Yong Sheng Tai Xue Bao. 2010 Sep;21(9):2273-8.
Taking the adjacent 18-year-old pure Pinus massoniana pure forest (I), P. massoniana, Liquidamber fomosana, and Schima superba mixed forest (II), S. superba pure forest (III), L. fomosana (IV) pure forest, and natural restoration fallow land (CK) in Taihe County of Jiangxi Province as test sites, a comparative study was made on their soil soluble organic carbon (SOC) and nitrogen (SON), soil microbial biomass C (MBC) and N (MBN), and soil urease and asparaginase activities. In 0-10 cm soil layer, the pool sizes of SOC, SON, MBC, and MBN at test sites ranged in 354-1007 mg x kg(-1), 24-73 mg x kg(-1), 203-488 mg x kg(-1), and 24-65 mg x kg(-1), and the soil urease and asparaginase activities were 95-133 mg x kg(-1) x d(-1) and 58-113 mg x kg(-1) x d(-1), respectively. There were significant differences in the pool sizes of SOC, SON, MBC, and MBN and the asparaginase activity among the test sites, but no significant difference was observed in the urease activity. The pool sizes of SOC and SON were in the order of IV > CK > III > I > II, those of MBC and MBN were in the order of CK > IV > III > I > II, and asparaginase activity followed the order of IV > CK > III > II > I. With the increase of soil depth, the pool sizes of SOC, SON, MBC, and MBN and the activities of soil asparaginase and urease decreased. In 0-20 cm soil layer, the SOC, SON, MBC, MBN, total C, and total N were highly correlated with each other, soil asparaginase activity was highly correlated with SOC, SON, TSN, total C, total N, MBC, and MBN, and soil urease activity was highly correlated with SON, TSN, total C, MBC and MBN.
以江西省泰和县相邻的18年生马尾松纯林（I）、马尾松、枫香、木荷混交林（II）、木荷纯林（III）、枫香纯林（IV）以及自然恢复撂荒地（CK）为试验地，对其土壤可溶性有机碳（SOC）和氮（SON）、土壤微生物量碳（MBC）和氮（MBN）以及土壤脲酶和天冬酰胺酶活性进行了比较研究。在0-10厘米土层中，各试验地SOC、SON、MBC和MBN的库容量范围分别为354-1007毫克·千克-1、24-73毫克·千克-1、203-488毫克·千克-1和24-65毫克·千克-1，土壤脲酶和天冬酰胺酶活性分别为95-133毫克·千克-1·天-1和58-113毫克·千克-1·天-1。各试验地SOC、SON、MBC和MBN的库容量以及天冬酰胺酶活性存在显著差异，但脲酶活性未观察到显著差异。SOC和SON的库容量顺序为IV>CK>III>I>II，MBC和MBN的库容量顺序为CK>IV>III>I>II，天冬酰胺酶活性顺序为IV>CK>III>II>I。随着土壤深度增加，SOC、SON、MBC和MBN的库容量以及土壤天冬酰胺酶和脲酶活性降低。在0-20厘米土层中，SOC、SON、MBC、MBN、总碳和总氮之间高度相关，土壤天冬酰胺酶活性与SOC、SON、总氮、总碳、总氮、MBC和MBN高度相关，土壤脲酶活性与SON、总氮、总碳和MBN高度相关。
