【摘要】：為探索土壤養(yǎng)分、酶活性和梵凈山冷杉死亡三者之間的關(guān)系,探尋導(dǎo)致梵凈山冷杉瀕危的土壤養(yǎng)分及酶活性因子,在其分布區(qū)分別采集死亡(Dp)與未死亡樣地(Lp)冷杉根區(qū)土壤,測(cè)定了土壤pH、有機(jī)質(zhì)(SOM)、全氮(TN)、堿解氮(AN)、全鉀(TK)、速效鉀(AK)、全磷(TP)、有效磷(AP)含量、陽(yáng)離子交換量(CEC)以及脲酶、磷酸酶、過(guò)氧化氫酶、多酚氧化酶活性,并對(duì)土壤養(yǎng)分和酶活性特征進(jìn)行分析。結(jié)果表明:2種樣地土壤全磷缺乏,其余養(yǎng)分為適宜到極豐富水平;AP、CEC、TK含量為L(zhǎng)pDp土壤,其余養(yǎng)分相差不大;脲酶、磷酸酶活性為L(zhǎng)pDp土壤,過(guò)氧化氫酶活性為L(zhǎng)pDp土壤,各酶之間的相關(guān)性均不明顯;Lp土壤脲酶活性與SOM含量存在顯著相關(guān)性,脲酶活性與AK和CEC含量間、過(guò)氧化氫酶活性與AN含量間、多酚氧化酶活性與AN和TN含量間均有較大正相關(guān)性;過(guò)氧化氫酶活性與CEC間、多酚氧化酶活性與TP和TK含量間有較大負(fù)相關(guān)性;Dp土壤磷酸酶活性與AP含量有較大負(fù)相關(guān)性,其余酶活性與養(yǎng)分間相關(guān)性較小。
[Abstract]:In order to explore the relationship between soil nutrient, enzyme activity and fir death in Fanjing Mountain, and to find out the soil nutrient and enzyme activity factors that lead to the extinction of Abies in Fanjing Mountain. The soil of (Lp) fir root region was collected from dead (Dp) and undead samples in its distribution area. Soil pH, organic matter, (SOM), total nitrogen, (TN), alkali hydrolyzed nitrogen, total potassium, (TK), available potassium, (AK), total phosphorus (TP), were determined. The contents of available phosphorus (AP), cation exchange capacity (CEC), urease, phosphatase, catalase, polyphenol oxidase activity, and the characteristics of soil nutrient and enzyme activity were analyzed. The results showed that the soil total phosphorus was deficient in two plots and the other nutrients were suitable to be very rich, and the AP,CEC,TK content was LpDp soil, but the other nutrients were not different from each other. Urease, phosphatase activity is LpDp soil, catalase activity is LpDp soil, the correlation between each enzyme is not obvious; There was a significant correlation between urease activity and SOM content in Lp soil. There was a positive correlation between urease activity and AK and CEC content, catalase activity with AN content, polyphenol oxidase activity with AN and TN content. There was a negative correlation between the activity of catalase and CEC, between the activity of polyphenol oxidase and the contents of TP and TK, between the activity of Dp and the content of AP, and between the activities of other enzymes and nutrients.
【作者單位】： 貴州大學(xué)農(nóng)學(xué)院;貴州醫(yī)科大學(xué)公共衛(wèi)生學(xué)院;貴州大學(xué)新農(nóng)村發(fā)展研究院中國(guó)西部發(fā)展能力研究中心;
【基金】：貴州大學(xué)研究生創(chuàng)新基金資助項(xiàng)目(研農(nóng)2015040) 貴州省省院合作資助項(xiàng)目(黔科合院地合[20130072]) 貴州省社發(fā)攻關(guān)資助項(xiàng)目(黔科合SY字[2013]3152號(hào))
【分類號(hào)】：S714

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