南亚热带侵蚀赤红壤治理前后土壤肥力的变化

Effect on different harness measures on lateritic red soil fertility in south subtropical zone

南亚热带侵蚀赤红壤土壤肥力的各项指标较差 ,植物难以生长。以生物措施为主 ,辅以必要的工程措施治理后 ,土壤的结构和水分状况得到一定程度的改善 ,土壤的养分库、养分供应强度和保肥性能均得到较大的提高 ,土壤的强酸性环境也得到一定程度的缓解。表明采取不同治理措施后 ,土壤的肥力得到一定程度的恢复。南岭黄檀是南亚热带侵蚀赤红壤一种较好的水土保持树种 ,改土效果较好。种植果树等开发性的治理措施可取得较高的经济效益 ,但应加大投入与管理力度 ,增施有机肥 ,并注意保留地表植被 ,以促进园地土壤结构改良与土壤肥力恢复 ,从而达到经济效益与生态效益的优化。表 2参 1

The effects of different harness measures on lateritic red soil fertility in Fujian in south subropical zone were studied.Each index of soil fertility of erosive lateritic red soil were so poor that can support few plant.Biological control measures and supplementary mechanical measures can improve the soil structure and humidity status,increase the level of soil nutrient stock,supply and conserve,and alleviate the strong soil acidity.The soil fertility under different control models is recovered to some extent.Dalbergia balansae  is proved to be an effective tree species at water and soil conserving and fertility ameliorating.Exploitative measures such as planting fruit trees can gain a relative high economic profit,however,to attained optimized economical and ecological profit.