發(fā)布時間：2018-02-15 20:30

  本文關(guān)鍵詞： 遼東山區(qū) 天然次生林 櫟林 土壤有機(jī)碳 土壤理化性質(zhì)　出處：《水土保持學(xué)報(bào)》2017年04期 　論文類型：期刊論文

【摘要】：通過對設(shè)置在遼東山區(qū)本溪市草河口鎮(zhèn)和莊河市仙人洞鎮(zhèn)兩個典型天然次生櫟林(Quercus spp.)樣地內(nèi)的土樣進(jìn)行分層(0—10,10—20,20—30,30—40cm)采集和室內(nèi)分析,研究了0—40cm土層土壤有機(jī)碳、全氮、全磷等含量的剖面分布特征,探討了有機(jī)碳與理化性質(zhì)間的關(guān)系。結(jié)果表明:土壤有機(jī)碳及全氮、全磷、全鉀、堿解氮、速效磷、速效鉀、陽離子交換量的含量均隨土層加深而降低,而土壤容重隨土層加深而增加,由t檢驗(yàn)和方差分析得知,各指標(biāo)含量在土層間差異均達(dá)到5%顯著水平;土壤有機(jī)碳與粉粒、pH、全氮、全磷、全鉀、堿解氮、速效磷、速效鉀、陽離子交換量間均呈顯著正相關(guān)(r=0.430 9~0.919 0,n=44,P0.01),與土壤容重、砂粒間均呈顯著負(fù)相關(guān)(r=0.388 3~0.670 6,n=44,P0.01),而與黏粒間無顯著相關(guān)性;由逐步回歸分析得知土壤堿解氮、碳氮比、全鉀、pH、全氮與有機(jī)碳間關(guān)系最為緊密。土壤有機(jī)碳與其他理化性質(zhì)間關(guān)系密切,且以全氮、堿解氮、碳氮比、全鉀和pH對其影響最大;同時,各指標(biāo)均具有明顯的剖面分布規(guī)律。
[Abstract]:Based on the set in two typical natural secondary Quercus Liaodong mountain area of Benxi city the CAOHEKOU town and Zhuanghe city Xianrendong Zhen Lin (Quercus spp.) in the plots of the soil layer (0 - 10,10 - 20,20 - 30,30 - 40cm) acquisition and analysis indoor, on 0 40cm soil organic carbon and total nitrogen. Profile distribution characteristics of phosphorus content, discusses the relationship between organic carbon and physicochemical properties. The results showed that soil organic carbon and total nitrogen, total phosphorus, total potassium, available nitrogen, available phosphorus, available potassium, cation exchange capacity were decreased with depth, while the soil bulk density with depth increased, informed by t test and analysis of variance, the content of each index difference in soil were significant at 5% level; soil organic carbon powder, pH, total nitrogen, total phosphorus, total potassium, available nitrogen, available phosphorus, available potassium, cation exchange capacity there is a significant positive correlation between r=0.430 (0 9~0.919 n=44, P0.0. 1), and the soil bulk density and sand are negatively correlated (r=0.388, 3~0.670 6, n=44, P0.01), while no significant correlation between grain and clay; by stepwise regression analysis of soil nitrogen, carbon and nitrogen ratio, total potassium, total nitrogen and organic carbon pH, the relationship between soil organic most closely. Carbon and other physicochemical properties are closely related, and the total nitrogen, available nitrogen, carbon and nitrogen ratio, total potassium and pH had the greatest impact; at the same time, the index had a profile distribution law obviously.

【作者單位】： 遼寧省森林經(jīng)營研究所遼寧遼東半島森林生態(tài)系統(tǒng)國家定位觀測研究站;
【基金】：林業(yè)公益性行業(yè)科研專項(xiàng)(201404303) 遼寧遼東半島森林生態(tài)系統(tǒng)國家定位觀測研究站運(yùn)行補(bǔ)助項(xiàng)目(2017-LYPT-DW-024)
【分類號】：S714.2

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