【摘要】 在福建漳江口红树林国家级自然保护区的高、中、低潮位带分别进行土壤取样和土壤养分含量测定，并计算C/N、C/P和P/N，应用单因素方差分析不同潮位的土壤养分特征和主成分分析。结果表明：有机碳含量以低潮位土壤最高，中潮位土壤最低；土壤硝态氮含量介于1.69～2.40 mg/kg，依次为高潮位>中潮位>低潮位；土壤有效磷含量介于27.20～53.05 mg/kg，潮位间差异显著，依次为低潮位>高潮位>中潮位；土壤有效态铁含量介于179.96～221.96 mg/kg；土壤有效态锰含量介于26.33～39.29 mg/kg，有效态铜含量介于2.17～2.36 mg/kg，但不同潮位间的差异不显著；土壤有效态锌含量介于8.84～13.22 mg/kg，依次为低潮位>高潮位>中潮位；土壤C/N介于7579.35～59152.04；土壤P/N介于14.93～107.34，依次为低潮位>高潮位>中潮位；土壤C/P介于393.93～622.99，依次为高潮位>中潮位>低潮位。不同潮位带的红树林土壤有机碳含量高，平均值为17995.53mg/kg，硝态氮、有效磷的含量较高，有效铁、锰、锌、铜等微量金属含量丰富，这说明红树林湿地土壤肥力比较高。红树林土壤C/N、C/P和P/N的平均值分别为26063.89、513.29和48.43，高于其他陆生林地土壤的。在主成分分析中有效磷、有效锌和有机碳为首要性状，其次是有效态锰、硝态氮、有效态铜，再次是有效态铁。综上，红树林土壤养分受植被、地形、底质、潮汐等区域多因素的共同影响。更多还原

【Abstract】 The soil samples in the high, middle and low tidal zones in Zhangjiangkou Mangrove National Natural Reserve were selected, and soil nutrient content was analyzed. The C/N, C/P and P/N were calculated, and the single factor variance analysis method and principal component analysis were used to analyze soil nutrient characteristics at different tidal levels. The results showed that the content of organic carbon in soil at low tidal zone was the highest, and that in soil at middle tidal zone was the lowest. The content of soil nitrate nitrogen ranged from 1.69 mg/kg to 2.40 mg/kg, with the order of high tidal zone>middle tidal zone>low tidal zone. The content of soil available phosphorus ranged from 27.20 mg/kg to 53.05 mg/kg, and the difference between tidal zones was significant, which was in the order of low tidal zone>high tidal zone>middle tidal zone. The content of available iron in soil ranged from 179.96 mg/kg to 221.96 mg/kg. The available manganese content in soil was 26.33～39.29mg/kg, and the available copper content was 2.17～2.36 mg/kg. There was no significant difference between different tidal zones.The content of available zinc in soil ranged from 8.84 mg/kg to 13.22 mg/kg, with the order of low tidal zone>high tidal zone>middle tidal zone. Soil C/N ranged from 7579.35 to 59152.04, and soil P/N ranged from 14.93 to 107.34, in the order of low tidal zone>high tidal zone>middle tidal zone. Soil C/P ranged from 393.93 to 622.99, which were high tidal zone>middle tidal zone>low tidal zone. Mangrove soil organic carbon content in different tidal zones was the highest, with an average of 17995.53mg/kg. Nitrate nitrogen and available phosphorus content were relatively high, and available iron, manganese, zinc, copper and other trace metals were rich, indicating that the soil fertility of mangrove wetland was relatively high. The average values of C/N,C/P and P/N of mangrove soil were 26063.89, 513.29 and 48.43 respectively, which were higher than those of other land forest soils. In principal component analysis, available phosphorus, available zinc and organic carbon were the primary characters,followed by available manganese, nitrate nitrogen, available copper, and available iron. Mangrove soil was affected by many regional factors, such as vegetation, terrain, sediment and tide.更多还原