1993-2018年广西桉树主产区土壤肥力演变特征分析

探明长期连栽的经营方式对广西桉树人工林土壤肥力的影响以及各土壤肥力指标的演变特征,为广西桉树人工林经营制定合理的营林、施肥管理方式.以广西桉树主产区域为研究对象,选取pH、有机质、全氮、全磷、全钾、碱解氮、有效磷、速效钾等土壤化学指标,采用模糊数学法评价广西1993-2018年桉树人工林地土壤肥力质量.结果表明,长期连...

Soil Fertility Evolution Characteristics in Main Eucalyptus Producing Areas of Guangxi: 1993-2018

To explore the characteristics of soil fertility evolution of eucalyptus plantation in Guangxi under long-term intensive management, and formulate a reasonable management method of eucalyptus plantation in Guangxi, the soil fertility quality of eucalyptus plantation from 1993 to 2018 was evaluated by means of fuzzy mathematics with soil chemical properties such as pH, organic matter, total nitrogen, total phosphorus, total potassium, alkali-hydrolyzed nitrogen, available phosphorus and available potassium. The results showed that the soil pH of eucalyptus plantation in Guangxi decreased from 4.83 to 4.63, a decrease of 4.14%. The contents of soil organic matter, total phosphorus, available nitrogen and available potassium all showed a significant decreasing trend. The soil fertility quality index (IFI) was between 0.475 and 0.613, and the overall fertility index was low. The soil of eucalyptus plantation showed a trend of acidification under long-term continuous planting during 1993-2018. In actual production, we should pay more attention to soil improvement, advocate soil testing and reasonable fertilization, reduce the use of acid fertilizer, increase the application of organic fertilizer and slow release fertilizer, and ensure the ecological health and sustainable development of eucalyptus plantation.