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不同密度杨树人工林的外源无机氮输入及土壤无机氮库研究(PDF/HTML)

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

Issue:
2015年04期
Page:
69-74
Column:
研究论文
publishdate:
2015-07-20

Article Info:/Info

Title:
External nitrogen input and soil inorganic nitrogen pool in different stands of poplar plantations
Article ID:
1000-2006(2015)04-0069-06
Author(s):
YAN Yafei123 TIAN Ye12 FANG Shengzuo12*SONG Hao12 DUN Xingjian124
1.Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China;
2.College of Forestry, Nanjing Forestry University, Nanjing 210037, China;
3. Forestry College, Henan University of Science and Technology, Luoyang 471003, China;
4. Shandong Acdemy of Forestry, Jinan 250014, China
Keywords:
poplar plantation stand density external nitrogen input soil inorganic nitrogen pool
Classification number :
S727.1
DOI:
10.3969/j.issn.1000-2006.2015.04.012
Document Code:
A
Abstract:
The seasonal soil nitrogen input was monitored using ion-exchange resin method, and the soil inorganic N pool(0-20 cm)was also determined in poplar plantations with different planting spacing in Chenwei Forestry Farm, Sihong County, Jiangsu Province. The results showed that the external inorganic nitrogen input had a seasonal pattern and the input of nitrate was the highest from August to October 2012 and the input of ammonium was the highest from February to April 2013. The gross input of inorganic nitrogen from May to October under high density stand was higher than those under low density stand. Inorganic nitrogen concentration and total inorganic nitrogen had a seasonal pattern. The concentration of NO-3-N was higher in growing season than other periods and the concentration of NH+4-N was higher in November. However, total inorganic nitrogen concentration of different stand structures had the minimum in February 2013. The total inorganic nitrogen was lower in low density stand than high density stand, which could be displayed obviously in August.

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Last Update: 2015-07-31