李正涛, 樊帆, 李世钰, 山云辉, 黄家雄, 吕玉兰, 何飞飞. 咖啡园土壤酸缓冲能力及其影响因素[J]. 云南大学学报(自然科学版), 2020, 42(1): 194-200. doi: 10.7540/j.ynu.20190295
引用本文: 李正涛, 樊帆, 李世钰, 山云辉, 黄家雄, 吕玉兰, 何飞飞. 咖啡园土壤酸缓冲能力及其影响因素[J]. 云南大学学报(自然科学版), 2020, 42(1): 194-200. doi: 10.7540/j.ynu.20190295
LI Zheng-tao, FAN Fan, LI Shi-yu, SHAN Yun-hui, HUANG Jia-xiong, LV Yu-lan, HE Fei-fei. Soil acid buffer capacity and the affecting factors of coffee planting field[J]. Journal of Yunnan University: Natural Sciences Edition, 2020, 42(1): 194-200. DOI: 10.7540/j.ynu.20190295
Citation: LI Zheng-tao, FAN Fan, LI Shi-yu, SHAN Yun-hui, HUANG Jia-xiong, LV Yu-lan, HE Fei-fei. Soil acid buffer capacity and the affecting factors of coffee planting field[J]. Journal of Yunnan University: Natural Sciences Edition, 2020, 42(1): 194-200. DOI: 10.7540/j.ynu.20190295

咖啡园土壤酸缓冲能力及其影响因素

Soil acid buffer capacity and the affecting factors of coffee planting field

  • 摘要: 为探明咖啡园土壤酸缓冲能力及其影响因素,采用酸碱滴定法对云南省德宏州芒市和保山潞江坝两个主产区7个咖啡园土壤不同初始pH值(pH=4.44~5.04)进行分析. 结果表明:供试土壤酸碱缓冲容量(pHBC)在13.8~25.0 mmol·kg−1. 从敏感性分级看,6个样点对酸碱敏感,1个样点稍敏感,说明供试土壤缓冲酸变化的能力较弱. pHBC与有机质、电导率、交换性H+、交换性酸、阳离子交换量和最大持水量呈极显著正相关(p>0.01,n=21),采用逐步回归对pHBC与土壤基本理化性质的因果关系进行分析,表达式为y=0.190x1+0.327 x2+1.297,r2=0.823,其中x1为电导率,x2为阳离子交换量,表明电导率和阳离子交换量对pHBC贡献最大. 应采用合理施肥,调整土壤理化性质等措施以提高咖啡园土壤酸缓冲能力,为优质咖啡生产创造良好的土壤生态环境.

     

    Abstract: Soil acid buffer performance was studied with the coffee planting soils from Mangshi and Lujiangba, major producing area of Yunnan Province. To study pH buffer capacity and influencing factors, 7 coffee planting soil samples were collected with different initial pH values (pH=4.44~5.04). The results showed that the pH buffer capacities (pHBC) ranged from 13.8 mmol·kg−1 to 25.0 mmol·kg−1. Based on the sensitivity classification, 6 samples showed sensitive and 1 sample showed slightly sensitive to acid and alkali changes, which implied weak acid buffer performance of the studied soils. Statistics analysis suggested that there was a significant positive correlation between pHBC and organic matter, conductivity, exchangeable H+, exchangeable acid, cation exchange capacity and maximum water holding capacity (p<0.01, n=21). The relationship between pHBC and the soil basic physical and chemical properties was analyzed by stepwise regression, which indicating that EC and CEC were the main factors affecting pHBC. In order to improve acid buffering performance of coffee planting soils and create a good soil ecological environment for high-quality coffee production, reasonable application of fertilizer and adjustment of soil physical and chemical properties should be adopted.

     

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