退化红壤区不同生态修复措施对土壤理化特性的影响

Effect of Different Restoration Measures on Soil Physico-chemical Properties in Degraded Red Soil

以裸露地为对照,对江西省严重退化红壤区不同生态修复措施（强烈干扰马尾松林、封禁、竹节沟、种草竹节沟、谷坊、无谷坊）下马尾松林分的土壤理化性质进行了研究。结果表明：与裸露地相比,不同恢复措施的马尾松林0～20cm土层的容重明显降低,最小的为谷坊马尾松林,容重为1.21g/cm3;种草竹节沟马尾松林对水分的改善效果最好,其0～20cm土层的最大持水量、毛管含水量和土壤含水量分别为44.27%、48.24%和46.28%。与裸露地相比,6种马尾松林分的土壤有机质和养分含量明显增加,强烈干扰马尾松林、封育马尾松林、竹节沟马尾松林、种草竹节沟马尾松林、谷坊马尾松林和无谷坊马尾松林的土壤有机质含量分别比裸露地高1.41、4.51、2.73、5.66、8.91和3.66g/kg;裸露地的N、P、K含量最低,种草竹节沟马尾松林的N含量最高,而竹节沟马尾松林的P和K含量最高。

Soil physico-chemical properties were determined of P. massoniana stands treated with different ecological restoration measures in degraded red soil area of Jiangxi province, taking bare ground as control. The results indicated that soil bulk density at the layer of 0-20cm under treated stands was far lower than that at bare ground, and the lowest was at P. massoniana stand ＋ check-dam. Moisture content in the soil was greatly improved in stand ＋ grass ＋ CST, the maximum water-holding capacity, capillary and soil moisture content was 44.27%, 48.24% and 46.28%. Soil organic matter in treated stands was 1.41, 4.51, 2.73, 5.66, 8.91 and 3.66g/kg higher than that in the control. N, P and K content in the control was found the lowest, and stand ＋ grass ＋ CST had the highest N content, while stand ＋ CST had the highest P and K content.