摘要
以元谋干热河谷生态恢复示范区人工林(大叶相思、柠檬桉)土壤为研究对象,测定其土壤中pH值、有机质、全N、全P、全K、速效N、速效P、速效K的含量,研究示范区内土壤养分的分布状况。结果表明,试验区土壤主要为弱酸性、弱碱性;有机质含量匮乏;全N含量和速效N含量均处于中等偏下水平;全P含量处于较丰水平,速效K处于较丰水平,速效P处于很丰水平,部分样地土壤磷素过高;土壤养分的空间变异性显著。结合试验区土壤养分状况,应对示范区增施有机肥,适量施用氮肥,少施磷肥,有针对性地配施钾肥,从而提高经济树种造林的成活率和保存率。
The soil nutrient of planted forest in the ecological restoration demonstration area of Yuanmou dry-hot valley was studied, including pH value, soil organic matter, total N, total P, total K, available N, P, K. The results indicated that the soil organic matter content of the study area was relatively lower, the total N and available N were medium lower, the total P was higher, the available K was rich and the available P was relatively higher. The spatial variation of soil nutrient was significant. For increasing survival rate and conseryation rate of planting, suggestions such as increasing the rate of organic and nitrogen fertilizers, decreasing the rate of phosphate fertilizers, and applying less potash according to the soil nutrition status and the environmental factors were recommended.
出处
《西部林业科学》
CAS
2017年第6期108-112,共5页
Journal of West China Forestry Science
基金
云南省科技惠民计划"干热河谷区抗旱型生态林业模式构建与示范(2014RA017)"
关键词
干热河谷
生态恢复
土壤养分
土壤理化性质
土肥管理
dry-hot valley
ecological restoration
soil nutrient
soil physical chemical properties
soil and fertilizer management
