摘要
为了解人为因素与自然因素对农地土壤肥力质量的影响,以浙东海积平原(涉及浙江省嘉兴市、杭州市、绍兴市、宁波市、台州市、温州市和舟山市等7个地级市)为研究区,分析了成土母质特性、土壤形成时间及人为管理等对耕地土壤p H、有机质、全氮、有效磷、速效钾和CEC等的影响。结果表明,无论是整个研究区还是特定的地级市的相同土壤类型区,土壤肥力指标均有较大的空间变异,表明农业管理对土壤肥力(特别是有机质积累、全氮、有效磷、速效钾)产生了很大的影响;但从土壤肥力指标的南北向变化及成土时间由短至长土壤肥力发生有规律地变化来看,成土母质的特性(主要为质地)和成土时间等自然因素对肥力性状仍有明显的影响。总体上,土壤有机质、全氮的积累和速效钾含量由北向南随土壤质地变重而趋向增加,土壤有机质、全氮和CEC随成土时间的增加(从盐土至潮土和水稻土)趋向增加,而土壤p H值随成土时间的增加趋向下降。但土壤有效磷主要受人为管理影响,其南北向变化不明显,受成土时间影响较小。
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 p H, 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 p H 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.
出处
《土壤通报》
CAS
CSCD
北大核心
2016年第3期618-623,共6页
Chinese Journal of Soil Science
基金
国家自然科学基金项目(41571207)资助
关键词
土壤肥力
质地
成土年龄
土壤类型
农业管理
Soil fertility
Texture
Soil formation time
Soil type
Agricultural management
