本文選題：土壤　切入點(diǎn)：磷含量　出處：《江蘇農(nóng)業(yè)科學(xué)》2017年06期

【摘要】：以海南吊羅山自然保護(hù)區(qū)4種類型森林(熱帶山地雨林原始林、熱帶山地雨林次生林、熱帶低地雨林原始林、熱帶低地雨林次生林)為研究對象,分析其土壤磷含量、氮磷比及磷密度分布情況,以期揭示土壤全磷分布特征,估算土壤磷儲(chǔ)量。結(jié)果表明:(1)各樣地土壤全磷含量平均值在剖面垂直分布上隨土壤深度增加而減少,而同一樣地全磷在土壤剖面無明顯分布規(guī)律。(2)土壤氮磷比隨土壤深度增加而降低,全磷、全氮、氮磷比均為中等變異。(3)不同樣地土壤磷密度相差很大,介于130.07~442.69 g/m~2之間。(4)4種類型森林土壤磷含量總體上呈現(xiàn)隨土壤深度增加而降低的趨勢,不同類型森林同一土層土壤磷含量存在差異。吊羅山土壤平均全磷含量為0.192 g/kg,0~100 cm土層土壤磷儲(chǔ)量平均值為21.5 t/hm~2。(5)吊羅山土壤磷含量空間異質(zhì)性中等,4種森林0~50 cm土層的磷密度貢獻(xiàn)率變化范圍為53%~56%,0~50 cm土層與50~100 cm土層的磷密度貢獻(xiàn)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噺瀛樺湪宸紓.鍚婄綏灞卞湡澹ゅ鉤鍧囧叏紓峰惈閲忎負(fù)0.192 g/kg,0~100 cm鍦熷眰鍦熷￥紓峰偍閲忓鉤鍧囧，

本文編號(hào)：1670427