施肥对桉树萌芽林土壤肥力质量的影响

Effects of Fertilization on Soil Fertility Quality of Eucalyptus Sprouting Plantations

以桉树二代萌芽林为研究对象,设置普通桉树专用肥(T1)、有机肥(T2)、有机无机复混肥(T3)以及不施肥对照(CK)4种处理进行为期2年的试验,基于13个土壤化学性质指标数据,运用主成分分析和灰色关联分析综合评价不同处理下桉树二代萌芽林土壤综合肥力质量,以期为选择适宜桉树二代萌芽林生长的肥料类型和提高林地土壤肥力提供依据。结果表明:与CK相比,施肥能提高土壤pH值、有机质、全氮、全磷、全钾、有效磷、速效钾、有效铜、有效锰、有效锌、有效铁、有效镁、有效钙的含量,其中土壤pH值变化范围为4.57~4.85,土壤有机质、全磷、速效钾、有效态铜、锰、锌含量均以T3最大,土壤全氮、全钾、有效态铁、镁、钙均以T1最大,有效磷含量则以T2最大。以T3的土壤肥力质量指数最大(60.16%),其次是T1(56.32%),大小顺序为:T3>T1>T2>CK。合理施肥能有效提高桉树二代萌芽林土壤肥力质量,其中以施用有机无机复混肥的提升效果最佳。

This study investigated the effects of four different fertilization treatments on Eucalyptus second-generation sprouting plantations over a 2-year period.The treatments included applying ordinary Eucalyptus-specific fertilizer(T1),organic fertilizer(T2),organic-inorganic compound fertilizer(T3),and a no-fertilizer control(CK).Principal component analysis and Grey relational analysis were utilized to evaluate the overall soil fertility quality under each treatment based on data from 13 soil chemical property indicators.The objective was to offer recommendations for selecting appropriate fertilizers to enhance the growth of the second generation Eucalyptus sprouting plantations and improve soil fertility in forested areas.The results indicated that fertilization significantly increased the levels of soil pH,organic matter,total nitrogen,total phosphorus,total potassium,available phosphorus,available potassium,available copper,available manganese,available zinc,available iron,available magnesium,and available calcium compared to the control.Soil pH ranged from 4.57 to 4.85 across the treatments.The highest levels of soil organic matter,total phosphorus,available potassium,and available copper,manganese,and zinc were observed with T3.T1 resulted in the highest levels of total nitrogen,total potassium,and available iron,magnesium,and calcium,while T2 had the highest available phosphorus content.The soil fertility quality index was highest for T3(60.16%),followed by T1(56.32%),with the ranking as follows:T3>T1>T2>CK.This study concluded that appropriate fertilization could significantly enhance the soil fertility quality of Eucalyptus second-generation sprouting plantations,with the organic-inorganic compound fertilizer showing the most effective improvement.