中国地理科学(英文版) ›› 2009, Vol. 19 ›› Issue (2): 168-176.doi: 10.1007/s11769-009-0168-z

• 论文 • 上一篇    下一篇

Application of Matter-element Model in Soil Nutrient Evaluation of Ecological Fragile Region

TANG Jie, WANG Chenye, LIN Nianfeng, LI Zhaoyang, LI Haiyi, MAO Zilong   

  1. College of Environment and Resource, Jilin University, Changchun 130012, China
  • 收稿日期:2008-06-15 修回日期:2009-01-10 出版日期:2009-06-20 发布日期:2009-11-28
  • 通讯作者: TANG Jie.E-mail:tangjie0724@163.com E-mail:TANG Jie.E-mail:tangjie0724@163.com
  • 基金资助:

    Under the auspices of National Natural Science Foundation of China (No. 40572170, 40871088 )

Application of Matter-element Model in Soil Nutrient Evaluation of Ecological Fragile Region

TANG Jie, WANG Chenye, LIN Nianfeng, LI Zhaoyang, LI Haiyi, MAO Zilong   

  1. College of Environment and Resource, Jilin University, Changchun 130012, China
  • Received:2008-06-15 Revised:2009-01-10 Online:2009-06-20 Published:2009-11-28
  • Supported by:

    Under the auspices of National Natural Science Foundation of China (No. 40572170, 40871088 )

摘要:

On the basis of the soil environment investigation in Da'an City, Jilin Province, China, 40 soil samples from main land use types were obtained and tested by standard method. Soil organic matter (SOM), total N (TN), total P (TP), total K (TK), available N (AN), available P (AP) and available K (AK) were chosen as the evaluation factors. A regional soil nutrient evaluation model was developed based on the matter-element model. The results show that the soil samples with nutrient grade Ⅱ-Ⅴ respectively account for 10%, 30%, 32.5% and 27.5%, and those with grade Ⅳ and Ⅴ account for 60% in all samples. The relationship between soil nutrients and land types indicates that the nutrients of farmland are relatively good, with 41.7% of soil samples with the nutrient grade Ⅳ and Ⅴ. The nutrients of saline-alkali land and sandy land are the worst, with 100% of soil samples with the nutrient grade Ⅳ and Ⅴ. And the ratios of soil samples grade Ⅳ and Ⅴ in grassland and wasteland are respectively 62.5% and 54.55%. Generally speaking, the soil nutrients status in Da'an City is poor, 60% of soil samples are in poor and extremely poor conditions, indicating that the soil has been severely eroded. Being a relatively superior evaluation method with more accurate results and spatial distribution consistency, matter-element analysis is more suitable for regional soil nutrient evaluation than previous models.

关键词: soil nutrient evaluation, matter-element model, extension engineering theory, ecological fragile region

Abstract:

On the basis of the soil environment investigation in Da'an City, Jilin Province, China, 40 soil samples from main land use types were obtained and tested by standard method. Soil organic matter (SOM), total N (TN), total P (TP), total K (TK), available N (AN), available P (AP) and available K (AK) were chosen as the evaluation factors. A regional soil nutrient evaluation model was developed based on the matter-element model. The results show that the soil samples with nutrient grade Ⅱ-Ⅴ respectively account for 10%, 30%, 32.5% and 27.5%, and those with grade Ⅳ and Ⅴ account for 60% in all samples. The relationship between soil nutrients and land types indicates that the nutrients of farmland are relatively good, with 41.7% of soil samples with the nutrient grade Ⅳ and Ⅴ. The nutrients of saline-alkali land and sandy land are the worst, with 100% of soil samples with the nutrient grade Ⅳ and Ⅴ. And the ratios of soil samples grade Ⅳ and Ⅴ in grassland and wasteland are respectively 62.5% and 54.55%. Generally speaking, the soil nutrients status in Da'an City is poor, 60% of soil samples are in poor and extremely poor conditions, indicating that the soil has been severely eroded. Being a relatively superior evaluation method with more accurate results and spatial distribution consistency, matter-element analysis is more suitable for regional soil nutrient evaluation than previous models.

Key words: soil nutrient evaluation, matter-element model, extension engineering theory, ecological fragile region