海南吊罗山自然保护区土壤磷研究

发布时间：2018-03-27 06:35

  本文选题：土壤　切入点：磷含量　出处：《江苏农业科学》2017年06期

【摘要】：以海南吊罗山自然保护区4种类型森林(热带山地雨林原始林、热带山地雨林次生林、热带低地雨林原始林、热带低地雨林次生林)为研究对象,分析其土壤磷含量、氮磷比及磷密度分布情况,以期揭示土壤全磷分布特征,估算土壤磷储量。结果表明:(1)各样地土壤全磷含量平均值在剖面垂直分布上随土壤深度增加而减少,而同一样地全磷在土壤剖面无明显分布规律。(2)土壤氮磷比随土壤深度增加而降低,全磷、全氮、氮磷比均为中等变异。(3)不同样地土壤磷密度相差很大,介于130.07~442.69 g/m~2之间。(4)4种类型森林土壤磷含量总体上呈现随土壤深度增加而降低的趋势,不同类型森林同一土层土壤磷含量存在差异。吊罗山土壤平均全磷含量为0.192 g/kg,0~100 cm土层土壤磷储量平均值为21.5 t/hm~2。(5)吊罗山土壤磷含量空间异质性中等,4种森林0~50 cm土层的磷密度贡献率变化范围为53%~56%,0~50 cm土层与50~100 cm土层的磷密度贡献率相差不大。
[Abstract]:In Hainan Luoshan District 4 types of crane natural forest protection (primary tropical montane rainforest, tropical montane rain forest, tropical lowland rainforest in the primitive forest and tropical lowland rainforest forest) as the research object, analyze the soil phosphorus content, phosphorus and nitrogen and phosphorus density distribution, in order to reveal the distribution of soil total phosphorus, estimation of soil phosphorus reserve. The results showed that: (1) soil total phosphorus content of the average value in the vertical distribution profile decreased with the increasing of soil depth, and the same as the total phosphorus in the soil had no obvious distribution. (2) soil nitrogen and phosphorus ratio increases with the increase of soil depth decreased, total phosphorus, total nitrogen, nitrogen and phosphorus ratio are moderate variation. (3) is not the same soil phosphorus density difference, between 130.07~442.69 and g/m~2. (4) the 4 general types of forest soil phosphorus content has increased with the soil depth decreased, the same in different types of forest soil 澹ょ７鍚�閲忓瓨鍦ㄥ樊寮�.鍚婄綏灞卞湡澹ゅ钩鍧囧叏纾峰惈閲忎负0.192 g/kg,0~100 cm鍦熷眰鍦熷￥纾峰偍閲忓钩鍧囧，

本文编号：1670427