华南农业大学学报2024，Vol.45Issue(3)：344-353,10.DOI:10.7671/j.issn.1001-411X.202307012
韶关市典型香芋产区土壤养分状况及肥力评价
Soil nutrient status and fertility evaluation of typical taro producing areas in Shaoguan City
摘要
Abstract
[Objective]To better understand the soil fertility status in typical taro producing areas in Shaoguan City,Guangdong Province,and provide suggestions for soil nutrient management in taro producing areas.[Method]The 0-30 cm soil samples were collected from taro rhizosphere in Laojun Village of Guitou Town,Guanpotan Village and Nongzhuang Village of Langtian Town from Shaoguan City,to determine the physical and chemical properties.Principal component analysis and correlation analysis were conducted to select the key indicators that best represent local soil fertility entering into minimum data set.All indicators were normalized using membership functions,and soil quality indices were calculated for soil fertility evaluation.[Result]The soils in three taro producing areas were all acidic with suitable bulk density(1.17 g·cm-3)and texture,but with low cation exchange capacity(CEC,9.17 cmol·kg-1).The contents of available P(54.20 mg·kg-1),Cu(2.07 mg·kg-1),Fe(186.33 mg·kg-1),Zn(1.87 mg·kg-1)were rich,while the contents of available Mn(4.21 mg·kg-1),B(0.12 mg·kg-1),Mo(0.10 mg·kg-1)were deficient or extremely deficient.The contents of other nutrients were at moderate to above-average levels.Among the three taro producing areas,there were significant differences in the percentage of soil grain size,contents of alkali-hydrolyzed N,exchangeable Ca,and exchangeable Mg,whereas the differences in other indicators were not significant.Seven indicators were selected to build the minimum data set for soil fertility evaluation,including alkali-hydrolyzed N,sand,clay,exchangeable Ca,available B,and available Fe contents as well as CEC.The evaluation results indicated that the soil fertilities of the three taro producing areas were at moderate levels,and the contents of alkali-hydrolyzed N and exchangeable Ca were the main limiting factors.[Conclusion]The overall soil fertility level of typical taro producing area in Shaoguan City is moderate,with poor soil nutrient retention capacity and deficiencies in trace elements,such as available Mn,B and Mo.Therefore,it is important to use organic fertilizers and micronutrient fertilizers during taro cultivation.Balanced fertilization shall be practiced to improve soil properties and enhance its nutrient retention capacity.关键词
香芋产区/养分水平/最小数据集/土壤肥力评价Key words
Taro producing area/Nutrient level/Minimum data set/Soil fertility evaluation分类
农业科技引用本文复制引用
崔罗肖,刘娅,赵兰凤,张新明,许一武,谢健,任宗玲..韶关市典型香芋产区土壤养分状况及肥力评价[J].华南农业大学学报,2024,45(3):344-353,10.基金项目
广东省基础与应用基础研究基金(2021A1515011283,2020A1515010556) （2021A1515011283,2020A1515010556）
国家自然科学基金(41977126) （41977126）
