Abstract：Soil samples of different land-use types were collected from nineteen villages in the middle line source area of the South-to-North Water Division Project. The distribution characteristics of organic matter, total nitrogen, nitrate-nitrogen, ammonium-nitrogen, and total phosphorus in the soil samples were studied. The content of total nitrogen, nitrate-nitrogen, ammonium-nitrogen, total phosphorus, and organic matter in the samples were in the range of 18.15~185.98, 5.75~77.96, 5.72~26.38, 37.98~147.32mg/kg, and 7.19~45.32g/kg, respectively. Topography and location showed little effect on nitrogen, total phosphorus, and organic matter contents of the soil. However, land-use type significantly influenced the contents of total nitrogen, nitrate-nitrogen, and organic matter. There was no significant difference in total phosphorus and ammonium-nitrogen contents between the soil samples of different land-use types in the studied area. The organic matter content decreased in the order of villages, paddy fields, ponds, water-level-fluctuating zone, dry lands, and woodlands. The total nitrogen content decreased in the order of paddy fields, villages, ponds, water-level-fluctuating zone, dry lands, and woodlands. While the nitrate-nitrogen contents decreased according to the following order: villages, ponds, water-level-fluctuating zone, dry lands, paddy fields, and woodlands. There was highly significant positive correlation between organic matter and total nitrogen(r=0.837, P<0.01), and significant positive correlations between ammonium-nitrogen and organic matter and total nitrogen(r=0.455, P<0.05;r =0.434, P<0.05). However, nitrate-nitrogen was not significantly correlated to ammonium-nitrogen, total nitrogen, and organic matter. Furthermore, there was no significant correlation between total phosphorus and any of organic matter, total nitrogen, nitrate-nitrogen, and ammonium-nitrogen.
肖春艳, 武俐, 赵同谦, 邰超, 李少华, 何晓祺. 南水北调中线源头区蓄水前土壤氮磷分布特征[J]. 中国环境科学, 2013, 33(10): 1814-1820.
XIAO Chun-Yan, WU Li, ZHAO Tong-Qian, TAI Chao, LI Shao-Hua, HE Xiao-Qi. Distribution characteristics of nitrogen and phosphorous in soils from the middle line source area of the South-to-North Water Division Project. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(10): 1814-1820.
