| 模拟氮沉降对油松土壤热水浸提有机物的影响 |
| 艾泽民1,2; 梁楚涛1,2; 辛奇3; 薛萐1,2; 刘国彬1,3
|
| 2018
|
发表期刊 | 水土保持研究
|
卷号 | 25期号:4页码:65-70 |
摘要 | 为了研究黄土高原林区氮沉降对油松土壤热水浸提有机物的影响及其根际效应,选择了 6 个施氮梯度[ 0 ,
2. 8 , 5. 6 , 11. 2 , 22. 4 , 44. 8g /( m
2 · a )],采用油松盆栽模拟试验,连续培养了6年。对油松根际、非根际热水浸提有机物
进行了研究,结果表明:不高于5. 6g /( m
2 · a )的模拟氮沉降量可以显著增加根际热水浸提有机碳含量,
5. 6g /( m
2 · a )及以
上的氮沉降对热水浸提有机碳的影响未达到显著水平。热水浸提总氮、热水浸提硝态氮、热水浸提有机氮、热水浸提
有机氮占热水浸提总氮和土壤全氮比例均随氮沉降量的增加而升高,且根际与非根际差异明显。紫外特征值的结果
表明,氮沉降会增加芳香族化合物及羧基含量,一定水平的氮沉降会增加热水浸提有机物的易降解组分的分解。较
低的氮沉降增加了根际热水浸提有机物,非根际则有差别。热水浸提有机物官能团特征发生改变且变化并不一致。
SUVA254 , E280 和 ASI 可作为指征代谢类型对氮沉降响应的潜在指标。 |
其他摘要 | Nitrogen deposition has an important influence on hot - water extractable organic matter in rhizo -
sphere and non - rhizosphere of Pinus tabulaeformis in the Loess Plateau.Pot experiments of Pinus tabulae -
formis were continuously
cultured for six years , with adding six nitrogen gradients [ 0 , 2. 8 , 5. 6 , 11. 2 , 22. 4and
44. 8g /( m
2 · a )]
.With respect to hot - water extractable organic matter ( hot - water extractable organic car -
bon , HWOC ; hot - water extractable organic nitrogen , HWON ) in rhizosphere and non - rhizosphere of Pinus
tabulaeformi s , nitrogen deposition content with less than 5. 6g /( m
2 · a ) markedly
increased HWOC.Nitro -
gen deposition content with more than or equal to 5.
6g
/( m
2 · a )
did not significantly affect HWOC.HWTN
( hot
- water extractable total nitrogen ), HWON , HWON / HWTN , HWTN / TN
( total nitrogen ) and
HWON / TN increased with increase of nitrogen deposition content.There were remarkable differences
between rhizosphere and non - rhizosphere situations.Nitrogen deposition increased aromatic compounds and
carboxyl content by UV characteristic values.A certain level of nitrogen deposition would decompose easy
-
decomposable components of hot - water extractable organic matter.Under a certain range of low nitrogen
deposition , hot water extractable organic matter in rhizosphere increased , which is different from that in
non - rhizosphere.Functional group contents of hot water extract organic matter could be changed , but the
changes were not consistent.Two indicators may permit to indicate metabolic type response differences for
nitrogen deposition.One is SUVA254and E280 ( associated with ammonia nitrogen , another is ASI ( associ -ated with nitrate nitrogen ) . |
关键词 | 氮沉降
热水浸提有机物
氮组分
官能团特征
根际
|
收录类别 | 中文核心期刊要目总览
|
语种 | 中文
|
文献类型 | 期刊论文
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条目标识符 | sbir.nwafu.edu.cn/handle/361005/10325
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专题 | 水保所知识产出(1956---)
|
作者单位 | 1.中国科学院 水利部 水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室 2.中国科学院大学 3.西北农林科技大学 水土保持研究所
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推荐引用方式 GB/T 7714 |
艾泽民,梁楚涛,辛奇,等. 模拟氮沉降对油松土壤热水浸提有机物的影响[J]. 水土保持研究,2018,25(4):65-70.
|
APA |
艾泽民,梁楚涛,辛奇,薛萐,&刘国彬.(2018).模拟氮沉降对油松土壤热水浸提有机物的影响.水土保持研究,25(4),65-70.
|
MLA |
艾泽民,et al."模拟氮沉降对油松土壤热水浸提有机物的影响".水土保持研究 25.4(2018):65-70.
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文件名:
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模拟氮沉降对油松土壤热水浸提有机物的影响_艾泽民.pdf
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格式:
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Adobe PDF
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