2018 NO.1
Nutrient Evaluation of Forest Soil in Yunfu City
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| Nutrient Evaluation of Forest Soil in Yunfu City | ||
| Ding Xiaogang | ||
| Guangdong Academy of Forestry, | ||
| 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 体育博彩平台排名ation 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 |