不同林齡栓皮櫟林下土壤顆粒分形及養(yǎng)分特征研究
[Abstract]:Based on the distribution principle and fractal theory of soil particle size components, the fractal characteristics and nutrient characteristics of soil particle size under four forest age forest types of Quercus variabilis in the southern foot of Taihang Mountain were studied by field investigation and laboratory test. The results were as follows: 1) the distribution of soil particle mass of Quercus variabilis was significantly different at different forest ages. With the increase of forest age, the content of clay and silt increased, and the content of sand decreased with the increase of forest age. 2) the fractal dimension D of 0~40cm soil diameter was between 1.35 and 2.61, the mean value was 2.14. The fractal dimension was positively correlated with soil clay and silt content, and negatively correlated with sand content. 3) the soil physical and chemical properties of Quercus variabilis at different forest ages were different. The contents of available phosphorus and organic matter in 40 years old were higher than those in 10 years old, but there was no significant difference in total nitrogen content, total nitrogen and available phosphorus in soil. The content of organic matter was positively correlated with the fractal dimension D.
【作者單位】: 河南農業(yè)大學林學院;
【基金】:國家自然科學基金項目(31270750) “十二五”國家科技支撐計劃項目(2011BAD38 B00)
【分類號】:S714
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