东北地区不同纬度农田土壤碱解氮的剖面分布

生态学杂志

东北地区不同纬度农田土壤碱解氮的剖面分布

施春健^1,2;庄秋丽^1,2;李琪^1,2;梁文举¹;姜勇¹

¹中国科学院沈阳应用生态研究所，沈阳 110016；²中国科学院研究生院，北京 100039

收稿日期:2006-08-24 修回日期:1900-01-01 出版日期:2007-04-03 发布日期:2007-04-03

Profile distribution of alkali-hydrolyzed nitrogen in farmland soils of Northeast China along a latitudinal gradient

SHI Chun-jian^1,2; ZHUANG Qiu-li^1,2; LI Qi^1,2; LIANG Wen-ju¹; JIANG Yong¹

¹Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;²Graduate University of Chinese Academy of Sciences, Beijing100039, China

Received:2006-08-24 Revised:1900-01-01 Online:2007-04-03 Published:2007-04-03

摘要/Abstract

摘要： 为研究农田土壤碱解氮的含量及其分布，以东北玉米带不同纬度农田土壤为对象，研究了100 cm深度范围内碱解氮含量垂直分布及纬向分异特征。结果表明: 土壤碱解氮主要分布在0～60 cm土层中，各样点碱解氮含量随土壤深度的增加而减少；除公主岭点外，其它各点0～60 cm的3个土层间碱解氮含量差异显著(P<0.05)；碱解氮含量与有机碳、全氮含量极显著正相关(P<0.01)，说明土壤碱解氮含量及其分布主要受土壤有机质和氮素水平的影响。0～20 cm土层碱解氮含量具有随纬度增加而增加的趋势，气候条件和土壤类型的差异是导致其纬向分布差异的主要原因。

关键词: 紫杉, 叶绿体, UVC辐射, 膜脂过氧化, PSⅡ电子传递

Abstract: The vertical distribution and latitudinal differentiation of alkali-hydrolyzed nitrogen in the profile down to 100 cm depth of maize soils in Northeast China was investigated along a latitudinal gradient. The results showed that soil alkali-hydrolyzed N was mainly distributed at the depth of 0—60 cm, and decreased with soil depth. Except for the Gongzhuling site, the soil alkali-hydrolyzed N content in other sampling sites was significantly different (P<0.05) among the 3 layers at the depth of 0—60 cm. Soil alkali-hydrolyzed N had a significant positive correlation (P<0.01) with soil organic carbon and total N, indicating that its content and distribution was mainly affected by soil organic matter and total N levels. Soil alkali-hydrolyzed N content increased with increasing latitude, and climate condition and soil type were considered as the main reasons that induced the latitudinal differentiation of soil alkali-hydrolyzed N.

Key words: Taxus cuspidata, Chloroplasts, UV-C radiation, Membrane lipid peroxidation, PSⅡelectron transport activity

施春健;庄秋丽;李琪;梁文举;姜勇. 东北地区不同纬度农田土壤碱解氮的剖面分布[J]. 生态学杂志.

SHI Chun-jian^1,2; ZHUANG Qiu-li^1,2; LI Qi^1,2; LIANG Wen-ju¹; JIANG Yong¹ . Profile distribution of alkali-hydrolyzed nitrogen in farmland soils of Northeast China along a latitudinal gradient[J]. cje.

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