热带农业科学2025，Vol.45Issue(4)：8-15,8.DOI:10.12008/j.issn.1009-2196.2025.04.002
干热河谷坡地芒果园土壤肥力特征及评价
Soil Fertility Characteristics and Evaluation of Sloping Mango Orchards in Dry-Hot Valley
摘要
Abstract
This study was conducted to understand the soil fertility characteristics of mango orchards at different slope posi-tions to guide scientific fertilization and control agricultural nonpoint source pollution in sloping mango orchards.In 2021,soil samples(0-20 cm depth)from 21 upper-slope,21 middle-slope,and 35 lower-slope mango orchards in the Tiandong County production area were collected via a grid sampling method.The soil pH,organic matter(OM),total nitrogen(TN),total phosphorus(TP),total potassium(TK),alkaline-hydrolyzable nitrogen(AN),available phosphorus(AP),and available potassium(AK)contents were measured.Based on the nutrient classification standard from the second national soil survey,soil fertility was evaluated via correlation analysis,the membership function method,and the soil fertility index(SFI).The results revealed that:The upper-slope soils were mainly slightly acidic,whereas the middle-and lower-slope soils presented increased acidity.The OM,TK,AN,and AK contents were mostly at the lower-middle level,the TN content was at the up-per-middle level,the TP content was low,and the AP content was extremely low.The average contents of OM,TN,TK,AP,and the N:P ratio followed the order of lower slope>middle slope>upper slope,with the OM,TN,TP,TK,and AP contents tending to increase downslope.Correlation analysis indicated that OM was significantly or highly significantly positively cor-related with TN,TP,and AN,whereas TP was highly significantly negatively correlated with the N:P ratio.The SFI indicated low fertility for upper-and middle-slope soils and medium fertility for lower-slope soils.Optimizing fertilizer input based on slope-specific fertility conditions can improve nutrient use efficiency and overall benefit in mango orchards.关键词
干热河谷/坡地/芒果园/土壤养分/肥力评价Key words
dry-hot valley/sloping land/mango orchard/soil nutrients/fertility evaluation分类
农业科技引用本文复制引用
彭嘉宇,陈开骥,区惠平,雷秋良,周柳强,黄金生..干热河谷坡地芒果园土壤肥力特征及评价[J].热带农业科学,2025,45(4):8-15,8.基金项目
广西科技重大专项(No.桂科AA20108002-2、No.桂科AA22036001-2) （No.桂科AA20108002-2、No.桂科AA22036001-2）
广西农业科学院基本科研业务专项(No.桂农科2021YT036) （No.桂农科2021YT036）
