Spatial-temporal Distribution Characteristics of Soil Organic Matter and Total Nitrogen in the Jiuduansha Wetlands of the Yangtze Estuary

2012 ◽  
Author(s):  
Chi-quan He ◽  
Gang Ni ◽  
Guang-yuan Zhi ◽  
Xia Liang ◽  
Wei Du ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Total Nitrogen ◽  
Temporal Distribution ◽  
Yangtze Estuary ◽  
Distribution Characteristics ◽  
The Yangtze Estuary

Evaluation of soil quality in different land uses in the Mengzi Gabin Basin, Southwest of China

2020 ◽  
Author(s):  
Liqun Tang ◽  
Zhijie Shan ◽  
Yang Yu
Keyword(s):  
Land Use ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Quality ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Agricultural Land ◽  
Organic Matter Content ◽  
Land Use Types ◽  
Total Potassium

<p>Re-vegetation has been widely carried out to prevent land degradation, reduce soil erosion, and improve soil quality. In order to investigate the characteristics of soil nutrients content in different land use types of karst gabin basin, soil organic matter, soil total nitrogen, soil total phosphorus, soil total potassium, soil pH, and soil texture in woodland, agricultural land, orchard, and grassland were surveyed in Mengzi Gabin Basin, Southwest of China. The difference of soil indicators between vegetation types was analyzed, and soil fertility quality of four land use types was comprehensively evaluated by the soil quality index (SQI). The results showed that land use significantly affected soil organic matter content. Soil organic matter content was the highest in grassland, followed by agricultural land and forest land, while orchard was lowest. There was a significant difference in soil total nitrogen content between different land uses. The total nitrogen content in farmland soil was the highest, followed by grassland and woodland, and the lowest in the orchard. Woodand had the highest total potassium content and the lowest total phosphorus content. The grassland soil had the highest total phosphorus content and the lowest total potassium content. pH value in the four land use types was acidic, ranged from 5.82 to 6.67. The soil quality index showed that woodland had the highest soil fertility quality. The results of the study could provide the basis of soil nutrients variation and status in Gabin basin, and also provides support for evaluating the soil improvements during vegetation restoration in fragile Karst ecosystems.</p>

scholarly journals Monitoring changes of soil organic matter and total nitrogen in cultivated land in Guangxi by remote sensing

2014 ◽  
Vol 34 (18) ◽  
Author(s):  
李燕丽 LI Yanli ◽  
潘贤章 PAN Xianzhang ◽  
王昌昆 WANG Changkun ◽  
刘娅 LIU Ya ◽  
赵其国 ZHAO Qiguo
Keyword(s):  
Remote Sensing ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Total Nitrogen ◽  
Cultivated Land
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