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| DingXiaogang,XIEYini,ChenLina,ZhangGeng,YangHaiyan,HuaYueshan,ZhangZhongrui,QiYe,ZhangXiangyu,LiXiaochuan,ZhaoZhengyong |
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| Nutrient Evaluation of Forest Soil in Yunfu City |
| Ding Xiaogang,XIE Yini,Chen Lina,Zhang Geng,Yang Haiyan,Hua Yueshan,Zhang Zhongrui,Qi Ye,Zhang Xiangyu,Li Xiaochuan,Zhao Zhengyong |
| (Guangdong Academy of Forestry;Institute for Science-Technology and Economy Development,;Guangdong Science and Technology Evaluation Center;College of Forestry, Guangxi University) |
| Abstract: |
| Soil provides the necessary living environ-
ment for the growth and development of plants in forest
ecosystems, and it is the hub for the transformation of
nutrient elements. However, the spatial variability of
soil is very high, and it is difficult to grasp the spatial
distribution characteristics of nutrients accurately. In
this paper, the forest soil of Yunfu city was used as the
research object to analyze the spatial variability of soil
nutrients and predict the distribution of soil nutrients.
The results showed that: (1) The content of soil or-
ganic carbon was 7.22–51.24 g/kg in Yun’an, and the
content of soil organic carbon was 7.22–51.24 g/kg in
Yuncheng. (2) The content of total nitrogen was between
0.30 and 2.20 g/kg, the content of total phosphorus was
between 0.15 and 0.37 g/kg, and the total potassium
content was between 4.39 and 31.13 g/kg in Yuncheng
and Yun’an. (3) The content of available nitrogen in
Luoding ranged from 6.72 to 508.32 mg/kg, and the
content of available phosphorus ranged 0.11 to 15.72
mg/kg, and the content of available potassium ranged
9.15 to 187.62 mg/kg. (4) The contents of exchangeable
calcium, exchangeable magnesium, total sulfur, total
cadmium, total plumbum and total zinc in Yuncheng and
Yun’an were 1.88 –1858.40 mg/kg, 0.16–96.34 mg/kg,
1.68 –917.51 mg/kg, 0.001 – 0.135 mg/kg, 0.85–343.32
mg/kg, 0.32–149.91 mg/kg, respectively; (5) The soil
organic matter content was low in the northeastern re-
gion, the organic matter content in the northwest region
was high, and they are divided into two distinct regions
in Yunfu city; The soil total nitrogen content was divid-
ed into two regions based on the north-south direction
line, the content of soil in the western part was higher,
and the content of soil in the eastern part was lower;
The soil total potassium content in the southern part was
higher, and the content of soil in the northern part was
lower; The soil total phosphorus content in the southern
part was higher, and the content of soil in the northern
part was lower. |
| Key words: Yunfu city · Soil nutrient · Spatial distribu-
tion · Nutrient prediction |