| 莫志安 1，赖武婷 2，李俊杰 1，连人豪 1，胡彩丽1，张慧琳 2，袁富坚 2.石门国家森林公园典型杉木林土壤理化特性分析[J].广东农业科学,2020,47(7):106-113 |
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石门国家森林公园典型杉木林土壤理化特性分析 |
| Analysis on Soil Physical and Chemical Properties of Representative Chinese Fir Stands in Shimen National Forest Park |
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| DOI：10.16768/j.issn.1004-874X.2020.07.013 |
| 中文关键词: 杉木 大径材 土壤养分 理化特性 相关性 |
| 英文关键词: Chinese fir large-diameter timber soil nutrient physical and chemical properties correlation |
| 基金项目:广州石门公园储备林杉木多目标经营示范林项目（穗石门公园资合字〔2018〕13 号） |
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| 中文摘要: |
| 【目的】提高石门国家森林公园杉木林地生产力，满足杉木大径材生长及森林多目标经营需求，测定其土壤养分含量，为平衡施肥提供参考。【方法】通过对其土壤理化性质进行测评，测算调查区杉木大径材土壤养分需求量。【结果】调查区土壤 pH 值介于 4.60~4.87 之间，土壤容重≤ 1.35 g/cm3，总孔隙度在30.46%~50.25% 之间。土壤有机质和氮素含量均在三级及以上标准；磷素含量在五级及以下标准；钾素含量在四级及以下标准。相关分析结果显示，调查区 0~20 cm 土层土壤容重与 20~40、40~60 cm 土层存在显著差异，0~20 cm 土层土壤总孔隙度与 40~60 cm 土层存在显著差异，土壤 pH 值与有机质、全氮、碱解氮、有效磷、速效钾极显著负相关，土壤有机质与全氮和有效氮、磷、钾呈极显著正相关，而全氮与碱解氮之间同样呈极显著正相关关系。【结论】石门国家森林公园各工区土壤容重和总孔隙度在 0~20、20~40、40~60 cm 土层间差异不显著，水平层次特性一致，属酸性土壤，土壤有机质、氮元素含量较为丰富，土壤磷、钾元素含量低，平衡施肥考虑选用磷肥、钾肥或者磷、钾复混肥等进行追肥。 |
| 英文摘要: |
| 【Objective】In order to improve the productivity of Chinese fir forest land in Shimen National Forest Park and meet the needs of the growth of large-diameter timber and multi-objective forest management, the study aimed to investigate the soil nutrient contents and provide references for balanced fertilization.【Method】Based on systematic evaluation of the soil physical and chemical properties, the soil nutrient demand of the large-diameter timber was calculated.【Result】The pH value of soil in the survey area varied from 4.60 to 4.87, the bulk density of soil displayed as ≤ 1.35 g/cm3, and the total porosity spanned from 30.46% to 50.25%. The contents of soil organic matter and nitrogen were on the third level and above, the content of phosphorus was on the fifth level and below, and the content of potassium was on the fourth level and below. Correlation analysis revealed that soil bulk density of layer A (0-20 cm) was significantly different from that of layer B (20-40 cm) and layer C (40-60 cm). Soil total porosity of layer A was significantly different from that of layer C. The pH value of soil was negatively correlated with organic matter, total nitrogen, alkali hydrolyzed nitrogen, available phosphorus and available potassium, while the organic matter was positively correlated with total nitrogen and available nitrogen, phosphorus and potassium. The total nitrogen was positively correlated with alkali hydrolyzed nitrogen.【Conclusion】In Shimen National Forest Park, there was no significant difference between soil bulk density and total porosity among layers A, B and C, the levels appeared to be similar among various work areas, and the soil was acid. The contents of soil organic matter and nitrogen were rich, but the contents of soil phosphorus and potassium were low. For balanced fertilization, phosphate fertilizer, potassium fertilizer or compound fertilizer of phosphorus and potassium should be selected for topdressing. |
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