张家界烟区不同海拔高度植烟土壤腐殖质与有机氮组分的特点及其相互关系

为了揭示张家界烟区植烟土壤腐殖质组分及有机氮组分的特点及其与海拔高度之间的关系，采用GPS定位技术采集张家界不同海拔的植烟土壤25个，对土壤进行腐殖质组分及有机氮组分进行分析，结果表明：土壤腐殖质各组分都随海拔升高呈先升高后降低趋势，腐殖质、腐殖酸、胡敏酸均在601～800 m海拔段平均值最高，富里酸在800 m以上海拔段平均值最高，胡敏素及胡富比在400~600 m海拔段最高；氨态氮、氨基酸态氮、未知态氮随海拔高度的升高呈先升高后降低趋势，并在400~600 m海拔段土壤酸解性总氮、酸解性氨态氮和酸解性未知态氮的平均值均最高；土壤有机氮组分与腐殖组分相关性显著，氨基酸态氮与腐殖酸、胡敏酸及胡敏素呈极显著相关性，氨基糖态氮与腐殖酸、富里酸及胡敏素呈极显著相关性。

The Characteristics and the Relationships Between Humus Compounds and Organic Nitrogen Compounds in Different Altitude Soil of Zhangjiajie Tobacco Planting Area

In order to reveal the characteristics of humus compounds and organic nitrogen compounds andtheir relationships with altitude in tobacco planting soil of Zhangjiajie, 25 soil samples were collected from fourpathway located by GPS technology in different altitude and their humus compounds and organic nitrogencompounds were analyzed. The results showed that the average amount of soil humus, humus aicd, humic aicdand soil organic matter activity reached the peak in the altitude of 601-800 meter, the average amount of fulvicacid and humin were much high in the same altitude. The compositions of acid organic nitrogen representedclear regular as the altitude change, ammonium nitrogen, amino acid nitrogen and unknown nitrogen allincreased and then decreased with the rising of altitude, total acid hydrolysable nitrogen, acid hydrolysableammonium nitrogen, acid hydrolysable amino nitrogen and unknown acid hydrolysable nitrogen all got the highlevel in the altitude of 400-600 m, the comprehensive nitrogen supplying capacity were best in this altitude.Soil humus compounds and organic nitrogen compounds showed significant correlation relationship, therelationships between amino acid nitrogen and humus aicd, humic aicd, humin and the relationships betweenamino sugar nitrogen and humus aicd, fulvic acid, humin were all highly significant.