摘要
以长沙市菜园、果园和茶园土壤为研究对象,分析了长沙市不同土地利用方式的土壤肥力现状,评价其肥力等级。结果表明:(1)长沙市研究区土壤养分中pH值变异系数最小,属于小变异;3种土地利用方式中菜园的土壤有效磷变异系数最大,属于高度变异。(2)3种土地利用方式土壤pH值在养分分级中以二级与三级为主,全市耕地的土壤平均酸碱度呈酸性,存在土壤酸化问题。(3)土壤有机质、全氮、速效氮与有效磷含量为适量水平,缓效钾含量普遍偏低。菜园的各类土壤养分最高,其次为果园,茶园土壤养分含量最低,这主要与不同的管理方式和施肥状况有关。总体而言,研究区土壤酸化问题依然存在,需进一步调控酸碱度,且不同土地利用方式土壤养分含量存在差异,建议采取维持氮肥与磷肥用量、增加钾肥用量的施肥措施。
In this study,we investigated the land use patterns and soil fertility levels of vegetable gardens,orchards,and tea gardens in Changsha City,China.The following results were obtained.(1)Soil pH showed the lowest coefficient of variation,indicating low variability;soils in vegetable gardens showed the highest coefficient of variation in available phosphorus,suggesting high variability.(2)Soil pH of the three land use patterns was primarily classified as Grade 2 and Grade 3;the soils of arable lands generally exhibited acidic pH values,indicating soil acidification.(3)Soil organic matter,total nitrogen,available nitrogen,and available phosphorus were at adequate levels,while fixed potassium was generally low.Soil nutrients were highest in vegetable gardens,followed by orchards,with tea gardens having the lowest nutrient content,mainly due to different management practices and fertilization conditions.Overall,soil acidification remains a concern within the study area,necessitating further pH adjustments.Given the variations in soil nutrient content across different land use patterns,it is recommended to maintain current levels of nitrogen and phosphorus fertilization and increase potassium fertilizer applications.
作者
王冲勇
胡明勇
王少希
任正伟
王伟
张达威
黄凯
刘毅
WANG Chong-yong;HU Ming-yong;WANG Shao-xi;REN Zheng-wei;WANG Wei;ZHANG Da-wei;HUANG Kai;LIU Yi(Changsha Agro-Tech Extension and Service Center,Changsha 410016,PRC)
出处
《湖南农业科学》
2024年第4期42-47,共6页
Hunan Agricultural Sciences
基金
长沙市化肥减量增效与耕地质量保护提升专项(长财农指〔2023〕77号)。
