摘要
石灰性土壤中存在的钙镁离子导致磷素固定,限制了植物的生长。添加不同种类的磷肥,可改善土壤无机磷形态,影响磷有效性。但目前磷肥添加对无机磷形态的综合性影响尚不明确。对符合条件的41组试验,按照施磷酸铵、过磷酸钙和磷酸二氢钾3种磷肥,以及施磷肥(P_(2)O_(5))为低(不超过60 mg/kg)、中(60~120mg/kg)、次高(120~180 mg/kg)和高浓度(超过180 mg/kg)共4种,利用MetaWin 2.1软件对数据进行整合分析,以明确石灰性土壤磷肥添加的种类和施用量。结果表明:(1)与未施磷肥相比,施用磷肥后二钙磷(Ca_(2)-P)、八钙磷(Ca_(8)-P)、十钙磷(Ca_(10)-P)、铁磷(Fe-P)、铝磷(Al-P)和蓄闭态磷(O-P)的效应值范围为0.0104~0.7457。施用磷酸铵、过磷酸钙和磷酸二氢钾后,Ca_(2)-P效应值分别为0.5446、0.66和1.0326,其效应值占总无机磷的比例分别为42.47%、44.72%和66.56%;(2)施用低、中浓度磷肥除Ca_(10)-P外均对无机磷形态有显著的正效应,施次高浓度磷肥后各形态无机磷均无显著变化,施高浓度磷肥除Ca_(10)-P和Fe-P外均有显著变化。施用低、中、次高和高浓度磷肥处理后,Ca_(2)-P效应值分别为0.6381、0.4503、0.7109和1.4949,其占无机磷总量的比例为37.14%~51.26%。综合来看,在石灰性土壤中,磷酸二氢钾为最佳磷肥种类,施用磷酸二氢钾,施磷肥浓度以不超过60 mg/kg为宜。
The large amount of calcium and magnesium ions leads to phosphorus fixation and limits plant growth in calcareous soil.Adding different types of phosphorus fertilizers can improve the inorganic phosphorus forms in soil and influence the phosphorus availability.However,the comprehensive impact of phosphorus fertilizer addition on the form of inorganic phosphorus have been unknown.To clarify the types and amounts of phosphorus fertilizer added to calcareous soil,the published 41 test data which met a series of conditions were integrated and analyzed by using MetaWin 2.1 software according to three types of phosphorus fertilizers including ammonium phosphate,calcium superphosphate and potassium dihydrogen phosphate,as well as four kinds of concentrations(P_(2)O_(5))including low(not exceeding 60 mg/kg),medium(60-120 mg/kg),sub-high(120-180 mg/kg),and high concentration(exceeding 180 mg/kg).The results showed that:(1)Compared with not applying phosphorus fertilizer,the average effect size of dicalcium phosphorus(Ca_(2)-P),octacalcium phosphorus(Ca_(8)-P),decacalcium phosphorus(Ca_(10)-P),iron phosphorus(Fe-P),aluminum phosphorus(Al-P),and stored phosphorus(O-P)after applying phosphorus fertilizer were 0.0104-0.7457,respectively.After the application of ammonium phosphate,calcium superphosphate and potassium dihydrogen phosphate,the average effect size of Ca_(2)-P were 0.5446,0.66 and 1.0326,and their ratio to the total inorganic phosphorus were 42.47%,44.72%and 66.56%,respectively;(2)The significant positive effect on phosphorus forms when applying phosphorus fertilizer at low and medium concentrations was found,whereas no significant change in inorganic phosphorus forms applying at sub-high concentrations,and the application of high concentration phosphorus fertilizer showed significant changes except for Ca_(10)-P and Fe-P.The Ca_(2)-P average effect size were 0.6381,0.4503,0.7109 and 1.4949,and their ratio to the total inorganic phosphorus were 37.14%-51.26%at low,medium,sub-high,and high concentration phosphorus fertilizers,respectively.In a short,potassium dihydrogen phosphate with the concentration not exceeding 60 mg/kg were suitable in calcareous soil.
作者
初蕙男
陈琳
耿玉清
CHU Hui-nan;CHEN Lin;GENG Yu-qing(Key Laboratory for Forest Silviculture and Conservation of the Ministry of Education,College of Forestry,Beijing Forestry University,Beijing 100083)
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2024年第11期239-247,共9页
Soil and Fertilizer Sciences in China
基金
青海省财政支农林草改革发展资金新技术推广项目(青林技[2020]17)。
关键词
磷肥添加
石灰性土壤
无机磷
磷形态
META分析
phosphorus addition
calcareous soil
inorganic phosphorus
phosphorus forms
Meta analysis
