摘要
在阳江罗琴林场连续4年进行了加勒比松幼林环境观测。结果表明,幼林阶段土壤肥力有逐年下降的趋势,下降最快的是磷,其次是缓效钾,下降最慢的是速效氮。造林后林地土壤除代换性钙离子年度间差异不显著外,其它土壤营养元素年度间差异均达到极显著或显著水平。分析表明,影响土壤肥力下降的主要因素是水土流失、降雨和植被恢复状况。
The article analyses the soil fertility degradation in yangjiang Caribbean pine planting site, the project has been carried out for 4 years, the results indicate ： Except the Ca con and Mg con, the other kinds of nutrients such as total nitrogan, available phosphate, available potassium, slowly available potassium etc. in the soil have decreased with a heavely trend. The order is phosphate 〉 slowly available potassium 〉 available nutrients.
出处
《广东林业科技》
2005年第4期30-33,共4页
Forestry Science and Technology of Guangdong Province
关键词
加勒比松
水土流失
造林
土壤肥力
Pinus caribaea, soil erosin, aforestation, soil fertility
