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油松林氮矿化随土壤有机物质量的变化特征(PDF/HTML)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2017年01期
Page:
69-74
Column:
研究论文
publishdate:
2017-01-31

Article Info:/Info

Title:
The characteristics of soil nitrogen mineralization with different amounts of organic input in Pinus tabuliformis forest
Article ID:
1000-2006(2017)01-0069-06
Author(s):
YU Yi1 GUO Huafeng2 ZHOU Zhiyong1*
1. College of Forestry, Institute of Forestry and Climate Change, Beijing Forestry University, Beijing 100083, China;
2. Lingkongshan Tree Farm, Taiyue Mountain National Forest Administration of Shanxi Province, Qinyuan 046500, China
Keywords:
Pinus tabuliformisi organic matter quality nitrogen mineralization soil nitrate nitrogen soil ammonium nitrogen warm temperate coniferous forest
Classification number :
S714
DOI:
10.3969/j.issn.1000-2006.2017.01.011
Document Code:
A
Abstract:
【Objective】Understand the mechanism of action of the different organic matter to soil nitrogen transform. 【Method】This study was carried out in Taiyue mountain of Shanxi Province. The inorganic nitrogen content of Pinus tabuliformis soil was monitored via the method of original site tube incubation after leaf detritus, stem wood detritus and biochar with equal weight applying into top soils. 【Result】The soil microbial biomass nitrogen content was significantly reduced by the wood debris applied, and that the soil nitrogen mineralization process showed distinctly seasonal variation. In May 2015, soil nitrate nitrogen content was markedly increased with 63.59%, 102.62% and 102.90% respectively compaire with CK by applied leaf debris, biochar and wood debris into the soil. However, the ammonium nitrogen content was reduced by the organic matter addition. Consequently, the net nitrogen mineralization was enhanced by 1.29, 0.40 and -3.47 mg/kg in the plots with biochar, leaf debris and wood debris addition, higher than that(-20.74 mg/kg)in the control plot. The nitrification rate was accelerated by organic matter addition in spring, autumn and winter, but was inhibited in summer. The ammonification rate was larger than zero only in winter for all treatments of organic matter addition. 【Conclusion】Soil nitrogen mineralization was accelerated by applying biochar over the annual scale and by applying wood debris over seasonal scale.

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Last Update: 2017-01-30