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通过测定高黎贡山东坡不同海拔高度0~20、20~40、40~60 cm土层土壤有机质含量、全氮含量,利用相关分析方法计算了有机质与海拔高度、全氮之间的相关系数。结果表明:海拔、土壤深度、植被类型、气温、降水量对土壤有机质有着显著影响。土壤有机质与全氮含量随海拔高度呈相似的变化趋势,两者在海拔高度2500 m左右达到最大值,而后略有降低再增加;在同一海拔高度,土壤有机质含量以及全氮含量随土层深度的增加而减少。0~20 cm土样的有机质含量明显高于其他两层,0~20 cm土壤有机质含量与20~40、40~60 cm土层土壤呈显著性差异,而20~40 cm和40~60 cm土层土壤差异不显著;海拔、土层深度、全氮含量、气温、降水量和土壤有机质含量具有显著相关性;植被类型中,河谷稀树灌木草丛的土壤有机质含量最低,寒温性灌丛草甸最高。中山湿性常绿阔叶林由于植被生长良好,群落结构复杂,枯枝落叶多,土壤有机质含量也较高;土壤有机质随气温的增加而减少;随降水量的增加呈增加趋势。
The soil organic matter and total nitrogen contents of 0 ~ 20, 20 ~ 40 and 40 ~ 60 cm soil layers in the east slope of Mt. Gaoligong were determined by correlation analysis method. The correlation coefficient between organic matter and altitude and total nitrogen . The results showed that altitude, soil depth, vegetation type, temperature and precipitation had significant effects on soil organic matter. Soil organic matter and total nitrogen content showed a similar trend with the altitude, both of them reached the maximum at an altitude of about 2500 m, then decreased slightly and then increased again. At the same altitude, the contents of soil organic matter and total nitrogen varied with soil depth Increase and decrease. The organic matter content of 0-20 cm soil layer was significantly higher than that of the other two layers. Soil organic matter content of 0-20 cm soil layer was significantly different from that of 20-40 and 40-60 cm soil layers, while that of 20-40 cm and 40-60 cm There was a significant difference between the soil types in the soil layers. There was a significant correlation between elevation, soil depth, total nitrogen content, air temperature, precipitation and soil organic matter content. In the vegetation types, the soil organic matter content was the lowest in the thinner shrub grasslands, The highest meadow. The mid-mountain wet evergreen broad-leaved forest has good vegetation growth, complex community structure, litter and more soil organic matter content. Soil organic matter decreases with the increase of temperature, and increases with the increase of precipitation.