【摘要】：為揭示北亞熱帶地區(qū)不同林分類(lèi)型的土壤活性碳氮分布特征,在駐馬店市南部山區(qū)選取4處具有代表性的松櫟人工混交林為研究對(duì)象,對(duì)其0—20cm土壤的溶解性有機(jī)碳(DOC),溶解性有機(jī)氮(DON)等組分進(jìn)行研究。結(jié)果表明:4種林型土壤DOC的含量為麻櫟純林濕地松麻櫟混交林火炬松麻櫟混交林馬尾松麻櫟混交林,DON的含量為馬尾松麻櫟混交林麻櫟純林濕地松麻櫟混交林火炬松麻櫟混交林,不同林分類(lèi)型間整體上差異性顯著(p0.05);在垂直剖面上,4種林型土壤DOC和DON均隨土層深度的增加而顯著性下降(p0.05)。4種林分類(lèi)型DOC/SOC,DON/TN,DOC/DON分別以麻櫟純林、馬尾松麻櫟混交林、麻櫟純林最高,在垂直空間分布上,差異性整體上不顯著。土壤DOC和DON與土壤含水率、土壤硬度、速效鉀、全氮均呈顯著(p0.05)或極顯著(p0.01)相關(guān)性。
[Abstract]:In order to reveal the distribution characteristics of soil active carbon and nitrogen in different forest types in the north subtropical region, four representative artificial mixed forests of Pinus and Quercus were selected in the southern mountain area of Zhumadian as the research object. The dissolved organic carbon (DOC), dissolved organic nitrogen (DON) and other components of its 0-20cm soil were studied. The results showed that the content of DOC in soil of 4 forest types was that the content of don in the mixed forest of Pinus massoniana and Quercus massoniana mixed forest was the mixed forest of Pinus massoniana and Quercus massoniana, and the content of DOC in pure forest of Pinus massoniana and Quercus massoniana was the mixed forest of Pinus massoniana and Quercus massoniana in pure forest of Pinus massoniana and Quercus massoniana. There were significant differences among different stand types (p0.05), DOC and DON of four forest types decreased significantly with the increase of soil depth on vertical profile (p0.05). The DOC/SOC,DON/TN,DOC/DON of pure Quercus acutissima forest, Pinus massoniana mixed forest and Quercus acutissima forest were the highest, respectively. In the vertical spatial distribution, the difference is not significant on the whole. Soil DOC and DON were correlated with soil moisture content, soil hardness, available potassium and total nitrogen significantly (p0.05) or extremely significantly (p0.01).
【作者單位】： 河南農(nóng)業(yè)大學(xué)林學(xué)院;
【基金】：國(guó)家自然科學(xué)基金面上項(xiàng)目“林木幼苗對(duì)切根的生理生態(tài)響應(yīng)及根-冠互作機(jī)制”(31570613)
【分類(lèi)號(hào)】：S714.2
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本文編號(hào)：2210757