植物营养与肥料学报2024，Vol.30Issue(4)：717-730,14.DOI:10.11674/zwyf.2023470
湖南省柑橘园土壤pH值空间变异特征、成因及养分有效性
Spatial variation characteristics and influence factors of soil pH and nutrient availability in citrus orchards of Hunan Province
摘要
Abstract
[Objectives]We studied the spatial variation characteristics,influencing factors of soil pH and the availability of main nutrients in citrus orchards of Hunan Province,aiming to provide scientific basis for slowing down soil acidification and improve soil fertility in citrus orchards.[Methods]In this study,15722 soil samples were collected from the citrus orchards of 38 citrus production counties in Hunan Province.The spatial variation characteristics of citrus orchard soil pH values across Hunan Province were explored using geostatistics,correlation analysis,structural equation models and other methods.The influence factors were screened from the aspects of geography,climate and soil properties,and the effects of soil pH on the availability of soil nitrogen(N),phosphorus(P),and potassium(K)were studied.[Results]The soil pH of citrus orchards in Hunan Province ranged from 3.00 to 8.50,and averaged 5.58 with a coefficient of variation of 18.06%,belonging to moderate spatial variation.The weakly acid soils that was most suitable for citrus growth accounted for 44.35%of the total citrus growing area,while the acidic,strongly acidic,neutral and alkaline soils accounted for 48.92%,1.69%,4.95%and 0.08%,respectively.Pearson correlation analysis showed that soil pH was positively correlated with precipitation(P<0.05)and readily available potassium content(P<0.01),but negatively correlated with temperature,alkali-hydrolyzable N and available P(P<0.01).The simulation results of structural equation model indicated that soil types and parent materials were the main factors causing the spatial variation of soil pH.Except for a few strongly alkaline soils with low levels of alkali-hydrolyzable N and available P,the alkali-hydrolyzable N,available P and readily available K contents in most soils were all in suitable levels.[Conclusions]More than half(50.61%)of the citrus orchard soils in Hunan Province are in a state of overacidity(acidic and strongly acidic)due to the soil types and parent materials.The available nitrogen,phosphorus and potassium contents in the citrus orchard soils in Hunan Province are basically at a suitable level.Therefore,more attention should be paid for the remediation of soil acidity.关键词
柑橘园土壤/pH值/空间特征/成土母质/地理因素/速效养分Key words
Citrusorchard soil/pH value/spatial distribution/parent material/geographical factor/available nutrient引用本文复制引用
徐章倩,周卫军,崔浩杰,周雨舟,商贵铎,李敏,岳晴晴..湖南省柑橘园土壤pH值空间变异特征、成因及养分有效性[J].植物营养与肥料学报,2024,30(4):717-730,14.基金项目
国家现代农业产业技术体系建设专项(CARS-26). （CARS-26）
