中国地理科学 ›› 2016, Vol. 26 ›› Issue (4): 508-517.doi: 10.1007/s11769-015-0737-2

• 论文 • 上一篇    下一篇

Soil Nutrient Variance by Slope Position in a Mollisol Farmland Area of Northeast China

ZHANG Shaoliang1, JIANG Lili2, LIU Xiaobing3, ZHANG Xingyi3, FU Shicong1, DAI Lin1   

  1. 1. College of Resource and Environment, Northeast Agricultural University, Harbin 150030, China;
    2. Harbin Normal University, Harbin 150025, China;
    3. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, China
  • 收稿日期:2014-01-07 修回日期:2014-04-02 出版日期:2016-08-27 发布日期:2016-06-21
  • 通讯作者: ZHANG Xingyi E-mail:zhangxy@neigaehrb.ac.cn
  • 基金资助:

    Under the auspices of Science and Technology Research Projects of Education Department of Heilongjiang Province, China (No. 12521010)

Soil Nutrient Variance by Slope Position in a Mollisol Farmland Area of Northeast China

ZHANG Shaoliang1, JIANG Lili2, LIU Xiaobing3, ZHANG Xingyi3, FU Shicong1, DAI Lin1   

  1. 1. College of Resource and Environment, Northeast Agricultural University, Harbin 150030, China;
    2. Harbin Normal University, Harbin 150025, China;
    3. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Harbin 150081, China
  • Received:2014-01-07 Revised:2014-04-02 Online:2016-08-27 Published:2016-06-21
  • Contact: ZHANG Xingyi E-mail:zhangxy@neigaehrb.ac.cn
  • Supported by:

    Under the auspices of Science and Technology Research Projects of Education Department of Heilongjiang Province, China (No. 12521010)

摘要:

In order to generate scientifically-based comparative information to improve fertilization efficiency and reduce nutrient loss, 610 samples of 122 soil profiles were collected at the 0-60 cm depth to compare soil nutrient contents including soil organic matter (SOM), total nitrogen (TN), total phosphorus (TP), available phosphorus (AP), and available potassium (AK) among different slope positions in a Mollisol farmland area of Northeast China. The contents of SOM and TN typically decreased with increased soil depth at back and bottom slope. Soil loss and deposition tended to decrease SOM and TN at the 0-20 cm soil depth on both the back slope and the slope bottom. The TP firstly decreased from 0-20 cm to 30-40 cm, and then not constantly increased at the back slope and the bottom slope. Due to the characteristics of soil nutrients and crop absorption, the contents of both AP and AK were typically the highest at the summit, followed by the slope bottom and the back slope in the 0-20 cm layer. Generally, in order to sustain the high soil productivity and protect the environment, attention should be paid to soil conservation on back slope; in addition, additional N and P fertilizer is necessary on the back slope.

关键词: soil organic matter, soil nitrogen, soil phosphorus, soil potassium, slope position, Mollisols, China

Abstract:

In order to generate scientifically-based comparative information to improve fertilization efficiency and reduce nutrient loss, 610 samples of 122 soil profiles were collected at the 0-60 cm depth to compare soil nutrient contents including soil organic matter (SOM), total nitrogen (TN), total phosphorus (TP), available phosphorus (AP), and available potassium (AK) among different slope positions in a Mollisol farmland area of Northeast China. The contents of SOM and TN typically decreased with increased soil depth at back and bottom slope. Soil loss and deposition tended to decrease SOM and TN at the 0-20 cm soil depth on both the back slope and the slope bottom. The TP firstly decreased from 0-20 cm to 30-40 cm, and then not constantly increased at the back slope and the bottom slope. Due to the characteristics of soil nutrients and crop absorption, the contents of both AP and AK were typically the highest at the summit, followed by the slope bottom and the back slope in the 0-20 cm layer. Generally, in order to sustain the high soil productivity and protect the environment, attention should be paid to soil conservation on back slope; in addition, additional N and P fertilizer is necessary on the back slope.

Key words: soil organic matter, soil nitrogen, soil phosphorus, soil potassium, slope position, Mollisols, China