| 作者单位 |
1.Guangxi Zhuang Autonomous Region State-owned Sanmenjiang Forest Farm, Liuzhou 545006, China; 2. Guangxi Zhuang Autonomous Region State-owned Huangmian Forest Farm, Luzhai 545618, China; 3. Guangxi Forestry Research Institute, Nanning 530002, China |
| 摘要 |
The aim was to clarify the environmental driving factors of soil fertility indicators in artificial forests of Guangxi and comprehensively evaluate the soil fertility level. By collecting data on the current status of soil in artificial forests, the spatial distribution of major soil fertility indicators was analyzed, and the distribution map of the fertility index of artificial forests in the entire region and the comprehensive fertility index of artificial forests of different soil types were obtained. Canonical correspondence analysis method was used to analyze soil fertility indicators and environmental factors, and the environmental driving factors of soil fertility indicators for artificial forests of the main soil types in Guangxi were obtained. The results showed that over 90% of the soil fertility index of artificial forests in the entire region was between 0.20 and 0.50. The order of soil fertility index of different soil types of artificial forests from high to low was yellow brown soil>yellow red soil>yellow soil>red soil>limestone soil>latosolic red soil>laterite. In artificial forests of latosolic red soil, the correlation between soil alkaline nitrogen and organic matter, annual average temperature was high, while the correlation between soil available phosphorus and organic matter, pH was high, and the correlation between soil available potassium and environmental factors such as slope, altitude, rainfall, accumulated temperature, and slope aspect was high. In artificial forests of red soil, the correlation between soil alkaline nitrogen and slope, altitude was high, while the correlation between soil available phosphorus and accumulated temperature, rainfall was high, and the correlation between soil available potassium and pH was high. In artificial forests of limestone soil, there was a high correlation between soil alkaline nitrogen and slope, organic matter, a high correlation between soil available phosphorus and accumulated temperature, rainfall, and a high correlation between soil available potassium and pH. |
