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采用野外调查与室内分析相结合的方法,对缙云山不同土地利用方式下土壤全磷含量、全磷储量和有效磷含量进行研究.结果表明:缙云山在不同土地利用方式下全磷含量及有效磷含量随着土层深度的增加均表现出明显的下降趋势.在0～60cm土层深度下,土壤全磷含量大小顺序依次为撂荒地(231.19 mg/kg),坡耕地(127.45mg/kg),果园(114.78mg/kg)和林地(78.52mg/kg),全磷储量亦有此特征,为撂荒地(2.18Mg/hm2),坡耕地(1.18Mg/hm2),果园(1.06Mg/hm2)和林地(0.70Mg/hm2);土壤有效磷平均含量大小顺序依次为果园(17.64mg/kg),坡耕地(15.24mg/kg),撂荒地(4.11mg/kg)和林地(3.33mg/kg);土壤有效磷占全磷含量的百分比为果园(15.9%),坡耕地(14.6%),林地(4.1%)和撂荒地(1.7%).这些结果表明耕地弃耕撂荒后有助于土壤全磷的累积,但其土壤的供磷水平降低;林地开垦为坡耕地和果园增加了土壤有效磷含量,并使得坡耕地和果园土壤的供磷水平升高.
Using the method of field investigation and indoor analysis, the contents of total phosphorus, total phosphorus and available phosphorus in different land use types in Jinyun Mountain were studied.The results showed that under different land use types, the total phosphorus content and available phosphorus content With the depth of soil layer increasing, the obvious decline trend was observed.Under the depth of 0 ~ 60cm, the total phosphorus content of soil followed the order of abandoned land (231.19 mg / kg), sloping farmland (127.45mg / kg) Total phosphorus storage also had the characteristics of fallow land (2.18Mg / hm2), sloping farmland (1.18Mg / hm2), orchard (1.06Mg / hm2) orchard (114.78mg / kg) And forest land (0.70Mg / hm2). The order of soil available P content in the order of orchard (17.64mg / kg), sloping land (15.24mg / kg), wasteland (4.11mg / kg) ), And the percentages of available phosphorus in total phosphorus were orchard (15.9%), sloping farmland (14.6%), woodland (4.1%) and fallow land (1.7%) .These results indicated that abandoned farmland Total phosphorus, but its soil phosphorus supply decreased; woodland reclamation for sloping fields and orchards increased soil available phosphorus content, and makes the sloping fields and orchards Phosphorous soil levels.