本文選題：橡膠林 + 不同林齡　； 參考：《熱帶作物學(xué)報》2017年05期

【摘要】：土壤粒徑分布影響土壤質(zhì)地均勻程度和土壤肥力等,是重要的土壤物理特征之一。運用土壤顆粒體積分形維數(shù)模型計算了西雙版納不同林齡橡膠林土壤剖面各層(共計105個土壤樣品)的分形維數(shù)D值。結(jié)果表明,分形維數(shù)D值介于2.636 2~2.885 0之間,分形維數(shù)與0.002 mm的黏粒體積百分含量呈極顯著正相關(guān)關(guān)系,與0.002~0.05 mm的粉砂和0.05~2.00 mm的砂礫呈極顯著負(fù)相關(guān)關(guān)系;不同林型的土壤顆粒體積分形維數(shù)隨土層深度增加變化不同,10齡和22齡橡膠林土壤粒徑分布曲線的波動性較32齡橡膠林的小,各層顆粒之間的差異性較32齡的大;分形維數(shù)和土壤黏粒體積百分含量與全鉀含量和自然含水率都在p0.05水平呈顯著正相關(guān)關(guān)系,粉砂體積百分含量除與上述土壤基本性質(zhì)呈顯著負(fù)相關(guān)關(guān)系外,還與土壤有機(jī)質(zhì)、全磷呈顯著負(fù)相關(guān),而分形維數(shù)和土壤黏粒體積百分含量與土壤有機(jī)質(zhì)、全磷、全氮、土壤容重、總孔隙度的相關(guān)性未達(dá)到顯著水平。
[Abstract]:The distribution of soil particle size affects the homogeneity of soil texture and soil fertility, which is one of the important physical characteristics of soil. Based on the fractal dimension model of soil particle volume, the fractal dimension D values of different layers (105 soil samples) in rubber forest profiles of different forest ages in Xishuangbanna were calculated. The results show that the fractal dimension D is between 2.636 and 2.885. The fractal dimension has a very significant positive correlation with the volume percent content of 0.002 mm clay, and a very significant negative correlation with the sand of 0.002 ~ 0.05mm and the gravel of 0.05 ~ 2.00mm. The fractal dimension of soil particle volume of different forest types varies with the increase of soil depth. The fluctuation of soil particle size distribution curve of 10 and 22 years old rubber forest is smaller than that of 32 years old rubber forest, and the difference between different layers is larger than that of 32 years old. Fractal dimension and soil clay volume percentage had significant positive correlation with total potassium content and natural moisture content at p0.05 level, and silt volume percentage content had a significant negative correlation with the basic properties of soil, but also with soil organic matter. There was a significant negative correlation between total phosphorus and soil organic matter, total phosphorus, total nitrogen, soil bulk density and total porosity, while the fractal dimension and the content of soil clay volume were not significantly correlated with soil organic matter, total phosphorus, total nitrogen, soil bulk density and total porosity.
【作者單位】： 云南師范大學(xué)旅游與地理科學(xué)學(xué)院;河海大學(xué)水文水資源與水工程科學(xué)國家重點實驗室;云南省水文水資源局;
【基金】：云南省水利廳水利科技項目(No.2014003) 國家自然科學(xué)基金項目(No.41461015) 江蘇省博士后科研資助計劃項目(No.150106B)
【分類號】：S714

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