Soil Fertility and Its Spatial Variation Pattern of Cultivated Land in Marine Plain of Zhejiang Province
To understand the effects of human activities and natural factors on soil fertility quality of farmland,coastal plain of eastern Zhejiang Province covering seven areas(Jiaxing,Hangzhou,Shaoxing,Ningbo,Taizhou,Wenzhou and Zhoushan)were selected to analyze the influences of parent material peoperties,soil formation time,and human management on soil pH,organic matter,total nitrogen,available phosphorus,available potassium and CEC.The results showed that spatial variabilities of fertility indices of farmland soils in either the total areas or each specific area were great,indicating that agricultural management activities had great effects on soil fertility indices,especially on the accumulation of organic matter,total nitrogen,available phosphorus,available potassium.According to the regular change pattern of soil fertility indices from north to south of the area or soil formation time from short to long,it was concluded that characteristics of soil parent materials(mainly texture),soil formation time and other natural factors had obvious effects on fertility indices.On the whole,accumulation of soil organic matter,total nitrogen and available potassium increased with increasing clay content of soil from north to south,and that of soil organic matter,total nitrogen and CEC increased with increasing soil formation time and evolution of soil types from saline soil to fluvo aquic soil and paddy soil.However,the soil pH value decreased with the increasing soil formation time.But soil available phosphorus was mainly affected by human management,and it was less affected by time.There was no obvious change trend of soil available phosphorus at the north-south direction.
NETL
NSTL
万方数据
维普
