论文部分内容阅读
以海南菠萝园为研究对象,通过调查取样分析表明,(1)随种植年限的延长及坡度的提高,土壤侵蚀量增加,菠萝园表层土壤石砾含量增加。(2)同一坡度,菠萝园土壤有机质、全氮、碱解氮和速效钾含量也随种植年限的延长及坡度的提高,侵蚀量增加而下降,尤其是有机质和全氮含量。(3)菠萝园土壤磷素及全钾含量,同一坡度不同年限间没有表现出衰退的趋势。
Taking Hainan pineapple orchard as the research object, the sampling and analysis showed that: (1) With the extension of planting period and the increase of slope, the amount of soil erosion increased, and the content of gravel in the surface soil of pineapple was increased. (2) Soil organic matter, total nitrogen, available nitrogen and available potassium content in the soil of pineapple were also increased with the increase of planting time and slope, and the erosion decreased with the increase of soil erosion, especially the content of organic matter and total nitrogen. (3) The contents of phosphorus and total potassium in the soil of Pineapple Field did not show the declining trend in different years with the same slope.