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苏北杨树人工林连栽林地土壤氮素矿质化原位研究

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

Issue:
2009年06期
Page:
69
Column:
研究论文
publishdate:
2009-11-30

Article Info:/Info

Title:
In situ study on soil nitrogen mineralization in successive rotation stands of poplar plantation in north Jiangsu province
Author(s):
WANG Lianggui1 ZHANG Huanchao2* ZHU Qianggen2 JIANG Yongfeng2 YAN Kaiyi3 WANG Fuhao3
1.College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China; 2.College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China; 3.Chenwei Forest Farm, Sihong 223900, China
Keywords:
poplar plantation successive rotation soil nitrogen mineralization
Classification number :
S714
DOI:
10.3969/j.jssn.1000-2006.2009.06.016
Document Code:
A
Abstract:
By the method of in situ soil coreion exchange resin bag (ISCIERB), the characteristics of soil nitrogen mineralization in the different successive rotation stands of poplar plantation (the first rotation of fouryearold and the second rotation of fouryearold) and the effects of tillage on the soil nitrogen mineralization in the second rotation of fouryearold poplar plantation were studied in north Jiangsu province. The results showed that the seasonal changes of soil ammonification rate in two rotation stands were similar. The soil ammonification rate in the second rotation stand was not obviously decreased and even increased in April and July, compared with the first rotation stand. However, the soil nitrification rate and net mineralization rate in the second rotation stand were significantly lower than that in the first rotation stand, especially in March, April and May. Compared with the notillage, the annual ammonified, nitrified and mineralized nitrogen of soil in the second rotation stand treated with the tillage were increased. Meanwhile, the tillage treatment was obviously increased the soil N lose by leaching which accounted for 49.15% of the total annual mineralized N, therefore soil inorganic N content was lower in the stand treated with tillage than that in the stand with notillage.

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Last Update: 2009-11-30