Abstract:
The statistical analysis is used in the soil data that is from eight different forest types of Dahurian larch forest in Daxinganling,the results are as follow:the highest contents of soil total nitrogen in humus horizon and in illuvial horizon both are Sphagnum-Bryum-L.dahurica forest,the lowest is respectively Ledum palustre var.dilatatum-L.dahurica forest,the range for 1.862~14.090g/kg.The diversity of soil total nitrogen in humus horizon and in illuvial horizon is obvious.The distribution trend on soil available nitrogen in humus horizon and in illuvial horizon is the same as total nitrogen,the range for 163.667~1056.064mg/kg.Between horizons,the soil available nitrogen is obvious also.The soil available nitrogen ratio to total nitrogen is higher,the range for 6.284%~10.748%,The correlation coefficients between the soil available nitrogen and the total nitrogen in Sphagnum-Bryum-L.dahurica forest and carex tato-L.dahurica forest are lower,though the another forests are higher.
Key words:
Dahurian larch forest,
Forest types,
Soil total nitrogen,
Soil available nitrogen,
Humus horizon,
Illuvial horizon
CLC Number:
YU Hai-yun, WEI Jiang-sheng, WANG Zhi-jun. Comparative Studies on Nitrogen Content of Soil in Different Forest Types of Dahurian Larch Forest[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2005, 20(S1): 77-80. doi: 10.7668/hbnxb.2005.S1.021.