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定位调查宁波奉化集约栽培的雷竹林土壤质量指标,结果表明:氮、磷养分在不同覆盖方式下,其全量养分、速效养分存在差异。林地全氮含量的变化范围是5.86～8.96g/kg,随着栽培年限的延长,土壤全氮含量呈现下降趋势,水解氮含量的变化范围是16.9～30.4mg/kg,全磷含量的变动范围是0.98～1.24g/kg,速效磷含量范围是12.45～29.60mg/kg。从全量养分数值来看,覆盖栽培后土壤全氮、全磷含量呈现增加趋势,速效氮、速效磷养分含量在覆盖4年、6年后增加最为显著,而覆盖10年后速效氮、速效磷含量反而比未覆盖林地下降。因此,从土壤肥力质量的氮、磷养分演变趋势看来,覆盖年限不宜超过10年,连续覆盖栽培3次后,应适当控制覆盖频率和次数,以确保土壤肥力的稳定和提高。
The results showed that the total nutrients and available nutrients of nitrogen and phosphorus were different in different coverage ways. The total nitrogen content in forest varied from 5.86 to 8.96 g / kg. With the extension of cultivation years, the total nitrogen content of soil decreased, and the range of variation of nitrogen content was 16.9-30.4 mg / kg. The variation range of total phosphorus content Is 0.98 ~ 1.24g / kg, available phosphorus content range is 12.45 ~ 29.60mg / kg. From the total nutrient value, the content of total nitrogen and total phosphorus in the soil showed an increasing trend after covering cultivation. The contents of available nitrogen and available phosphorus were the most significant after covering for 4 years and 6 years, while the content of available nitrogen, Instead, the content of forest cover did not decline. Therefore, from the evolutionary trend of nitrogen and phosphorus nutrients in soil fertility quality, the coverage period should not exceed 10 years. After three times of continuous coverage cultivation, the coverage frequency and frequency should be properly controlled to ensure the stability and increase of soil fertility.