[1]WANG Bin,WEI Tianxing,LIU Zhao.Characteristics of Nutrient Cycling and Ecosystem Structure of Larix principis-rupprechtii in Hilly Loess Plateau[J].Research of Soil and Water Conservation,2017,24(06):45-51.
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Characteristics of Nutrient Cycling and Ecosystem Structure of Larix principis-rupprechtii in Hilly Loess Plateau
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 06
Page number:
45-51
Column:
Public date:
2017-11-24
- Title:
- Characteristics of Nutrient Cycling and Ecosystem Structure of Larix principis-rupprechtii in Hilly Loess Plateau
- Keywords:
- forest ecosystem; nutrient cycling characteristics; biomass; nutrient content; accumulation and distribution
- CLC:
- S718.55
- DOI:
- -
- Abstract:
- Cycling symbol of thirteen nutrient elements in ecosystem of 23-year-old plantation of Larix principis-rupprechtii in Jixian County, Shanxi Province was studied through survey of sample plots and indoor sample analysis. Spatial distribution of biomass in different organs of plantation ecosystem in the study area was measured, the accumulation and distribution of nutrient elements in spatial variation combining with organ nutrient content of trees were obtained; nutrient content and nutrient accumulation & distribution of other chambers of the four major chambers (forest, soil, litter and atmosphere) were measured to obtain annual nutrient return of Larix principis-rupprechtii plantation in nutrient cycling of 134.719 kg/(hm2·a), annual storage of 53.409 kg/(hm2·a) and annual absorption capacity of 188.129 kg/(hm2·a); at last, in summary of nutrient cycling in above chambers, parameters and indicators reflecting characteristics of nutrient biological cycle of the forest ecosystem were obtained. Average cycle coefficient of N, P, K in plantation ecosystem of Larix principis-rupprechtii in the study area was 0.68, revealing that cycling of ecosystem in the study area was faster; utilization coefficient was small, storage efficiency was slow and soil nutrient use efficiencywas higher; nutrient elements that passed through canopy significantly increased (canopy interception of 142.1 mm), with normal requirement on precipitation (587.8 mm). Higher enrichment factor enabled it to adapt to barren environment with low nutrient consumption. As a whole, Larix principis-rupprechtii is of great potential for forest regeneration and afforestation.
- References:
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1900-01-01