不同生长年限对月季土壤不同层次活性有机质及碳库管理指数的影响

为探索不同生长年限月季不同土层活性有机质及碳库管理指数(carbon management index,CMI)的变化特征,选取草坪土(CK)、1~5、6~10、11~15年4个不同生长年限月季的处理,测定并分析土壤高、中、低活性有机质及CMI变化特征。结果表明,不同土层土壤有机质及活性有机质含量在6~10年处理中最高。0~20 cm土层,有机质达到12.9 g/kg,高、中、低活性有机质分别达到1.3、3.3、7.0 g/kg;20~40 cm土层,有机质达到5.7 g/kg,高、中、低活性有机质分别达到1.4、1.5、2.4 g/kg。在0~20 cm土层,CMI均随种植年限的增加而增加;在20~40 cm,CMI在6~10年的种植年限中最大。整体来看,月季土壤的有机质及活性有机质随种植年限的增加而增大是在一定年限内的,6~10年的种植年限月季对土壤有机质的活性状况和土壤碳库质量的提升效果最好。

Effects of different Chinese rose growth years on labile organic matter and carbon management index in different soil depths

In order to explore the changes of soil labile organic matter(LOM)and carbon management index(CMI)in Chinese rose with different growth years,four treatments with different growth duration as turf soil(CK),1~5,6~10 and 11~15 a was carried out.The soil highly(HLOM),moderately(MLOM)and lowly labile organic matter(LLOM)and carbon management index(CMI)were determined and analyzed.The results showed that,the soil organic matter(SOM)and LOM content under 6~10 a treatment in different soil layers were the highest.Therein,at 0~20 cm,the SOM content was 12.9 g/kg,and the HLOM,MLOM,and LLOM content were 1.3,3.3,7.0 g/kg,respectively;at 20~40 cm,the SOM was 5.7 g/kg,the HLOM,MLOM,and LLOM content were 1.4,1.5,2.4 g/kg,respectively,under the 6~10 a treatment.At 0~20 cm,the CMI was increased with the planting years;at 20~40 cm,the CMI was the highest one under 6~10 a treatment.Generally,the SOM and LOM content was increased in a certain period of time,and which was the best one under 6~10 a treatment.