|
|
|
| Soil properties and water conservation function of <i>Betula platyphylla</i> secondary forest with different stand ages |
| Li Wenying1,Man Xiuling1,Zhang Yangwu1,2 |
| 1.Northeast Forestry University,150040,Harbin,China;2.Academy of Forest Inventory and Planning,State Forestry Administration,100714,Beijing: China |
|
|
|
|
Abstract Soil characteristics,water holding capacity of litter and soil water storage properties of four different ages of Betula platyphylla secondary forest in Xiaoxing'an Mountain were analyzed.The results showed that: the volume and maximum water holding capacity of litter in 38 years old of Betula platyphylla secondary forest were biggest,while that in 70 years old were lower,relatively. There were significant positive correlation between the volume and maximum water holding capacity of litter.And the non-capillary porosity was fluctuating changes with ages.It was beneficial to rainfall infiltration through the 0-30 cm soil layer in 38 years old of the Betula platyphylla secondary forest,while that in 25 years old with the smallest non-capillary porosity is not beneficial to rainfall infiltration according to the soil bulk density and non-capillary characteristics analysis.Based on the investigated data,the decreasing order of soil water conservation function of the four ages of the Betula platyphyllasecondary forest was 70 a(3 628.445 t/hm2),56 a(3 524.015 t/hm2),25 a(3 433.626 t/hm2),38 a(3 275.820 t/hm2).
|
|
Received: 05 February 2009
|
|
|
|
|
|
|
