不同种植年限茭白田土壤的有机碳含量与结构特征  

Soil organic carbon content and structural characteristics in water bamboo fields with different cultivation time

作　　者：艾然 何杰 林海忠 翁丽青 陈照明 马军伟[2] 王强[2] AI Ran;HE Jie;LIN Haizhong;WENG Liqing;CHEN Zhaoming;MA Junwei;WANG Qiang(College of Environment and Resources,Zhejiang A&F University,Hangzhou 311300,China;Institute of Environmental Resources and Soil Fertilizer,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China;Huangyan Bureau of Agriculture and Rural Affairs,Taizhou 318020,Zhejiang,China;Yuyao Bureau of Agriculture and Rural Affairs,Yuyao 315400,Zhejiang,China)

机构地区：[1]浙江农林大学环境与资源学院,浙江杭州311300 [2]浙江省农业科学院环境资源与土壤肥料研究所,浙江杭州310021 [3]台州市黄岩区农业农村局,浙江台州318020 [4]余姚市农业农村局,浙江余姚315400

出　　处：《浙江农业学报》2024年第11期2558-2565,共8页Acta Agriculturae Zhejiangensis

基　　金：台州市黄岩区农业绿色发展先行先试支持体系建设服务项目(HY202001);优质稻全产业链绿色发展模式集成示范(202201)。

摘　　要：为探究茭白种植年限对土壤有机碳(SOC)含量和结构特征的影响,以浙江余姚和黄岩两地不同种植年限的茭白田土壤(黄岩的种植年限为0、5、15、30 a,余姚的种植年限为1、5、15 a)为对象,采集0~20、>20~40 cm土层样品,测定土壤颗粒有机碳(POC)含量,并通过固态碳-13核磁共振技术(^(13)C NMR)对SOC官能团丰度进行检测。结果表明:在黄岩试验点,0~20 cm茭白田的SOC含量随种植年限的增加而增加,但茭白种植年限对>20~40 cm土层的SOC含量无显著影响,与未种植茭白的农田相比,种植30 a茭白田的0~20 cm土层的SOC、POC含量分别显著(P<0.05)升高40.3%、86.4%,POC占SOC的比例显著增加12百分点,但土壤烷基碳比例显著降低5.96百分点,>20~40 cm土层的烷基碳比例显著下降9.53百分点,而芳香碳比例显著升高4.31百分点。在余姚试验点,各种植年限茭白田0~20、>20~40 cm土层的SOC官能团丰度和>20~40 cm土层的SOC、POC含量均无显著差异,但与种植1 a茭白的相比,种植5 a茭白田0~20 cm土层的SOC、POC含量分别显著提高41.0%、87.1%,POC占SOC的比例显著增加10百分点。综上,茭白种植可以提高0~20 cm土层的SOC含量和POC含量,但随着种植年限的增加,土壤有机碳的稳定性减弱。In order to investigate the effects of water bamboo cultivation time on soil organic carbon(SOC)content and structural characteristics,soil samples were collected from 0-20 cm and>20-40 cm layer from water bamboo fields with different planting years in Huangyan District and Yuyao City in Zhejiang Province,China,(in Huangyan,the water bamboo cultivation time was 0,5,15,30 a,respectively;in Yuyao,the water bamboo cultivation time was 1,5,15 a,respectively).The soil particulate organic carbon(POC)content was determined,and the SOC functional group abundance was detected by solid-state^(13)C nuclear magnetic resonance(^(13)C NMR).The results showed that,the SOC content in 0-20 cm layer of water bamboo field increased with the prolonged cultivation time,but the cultivation time did not significantly affect the SOC content in>20-40 cm soil layer in Huangyan.Besides,compared with the filed without water bamboo cultivation,the contents of SOC and POC content in the 0-20 cm soil layer of water bamboo field cultivated for 30 a in Huangyan were significantly(P<0.05)increased by 40.3%,86.4%,respectively,the proportion of POC in SOC in 0-20 cm soil layer was significantly increased by 12 percentage points,the proportion of alkyl-C was significantly decreased by 5.96,9.53 percentage points in the 0-20,>20-40 cm soil layer,respectively,and the proportion of aromatic-C was significantly increased by 4.31 percentage points in the>20-40 soil layer.In Yuyao,the SOC functional group abundance in both 0-20 and>20-40 cm soil layer and the contents of SOC,POC in>20-40 cm soil layer were not significantly influenced by the cultivation time.Compared with the water bamboo field cultivated for 1 a,the contents of SOC and POC in the 0-20 cm soil layer of the water bamboo field cultivated for 5 a were significantly increased by 41.0%,87.1%,respectively,and the proportion of POC in SOC was significantly increased by 10 percentage points.In general,water bamboo planting could increase the SOC content and POC content in 0-20 cm soil layer,yet t

关 键 词：茭白 种植年限 土壤有机碳 有机碳组分 碳-13核磁共振(^(13)C NMR) 

分 类 号：S318[农业科学—作物栽培与耕作技术]