摘要
为探究不同浓度烤烟根系分泌物处理对植烟土壤酶活性及养分的影响,以广西河池市罗城县植烟田0~20 cm耕作层土壤为试验材料,将获取的烤烟根系分泌物浓缩液配置成低、中、高3种浓度梯度均匀滴入土壤,分别于培养5、15、30 d时采集土样,测定土壤团粒结构、土壤酶活性及土壤养分含量。结果表明:根系分泌物可有效增加土壤大团聚体数量,降低土壤有机质含量,提高土壤速效磷、速效钾、速效氮含量;增强了土壤过氧化氢酶、多酚氧化酶、脲酶、磷酸酶、蔗糖转化酶活性;土壤酶活性与土壤养分密切关系,脲酶、磷酸酶和蔗糖转化酶均与土壤养分呈显著相关。综合分析认为,烤烟根系分泌物可有效增加土壤水稳性团聚体比例,并通过影响酶活性而影响土壤养分释放、改善土壤肥力状况,为根系营造良好的生态微环境。
In order to investigate the effects of root exudates treated with different concentrations of flue-cured tobacco on the soil enzyme activity and nutrient content of flue-cured tobacco,the0-20cm tillage layer of Luocheng county,Hechi city,Guangxi province was used as the experimental material to set the root exudates of flue,the soil concentration,soil enzyme activity and soil nutrient content were measured at5days,15days and30days after soil concentration.The results showed that root exudates could effectively increase the number of large aggregates in soil,the soil organic matter content could be significantly reduced,and the contents of available phosphorus,available potassium and available nitrogen increased;soil catalase,Polyphenol oxidase,urease,phosphatase and sucrose converting enzyme enhanced.Soil enzyme activity was closely related to soil nutrient,especially urease,phosphatase and sucrose converting enzyme were significantly correlated with soil nutrient.The results showed that the root exudates of flue-cured tobacco could effectively increase the proportion of soil water-stable aggregates and improve the soil fertility status by affecting the activity of soil nutrients and improve the soil fertility,and create a good ecological environment for the roots.
作者
肖明礼
刘高
韦建玉
金亚波
王军
王行
王维
XIAO Ming-li;LIU Gao;WEI Jian-yu;JIN Ya-bo;WANG Jun;WANG Hang;WANG Wei(Technology Center of China Tobacco Guangdong Industrial Co.,Ltd.,Guangzhou 510385,China;College of Agriculture,South China Agricultural University,Guangzhou 510642,China;China Tobacco Guangxi Industrial Corporation,Nanning 530001,China;Nanxiong Tobacco Science Research Institute of Guangdong Province,Nanxiong 512400,China)
出处
《广东农业科学》
CAS
2017年第12期59-66,共8页
Guangdong Agricultural Sciences
基金
广东中烟工业有限责任公司科技计划项目(15XM-QK[201502])
广西中烟工业有限责任公司科技计划项目(201545000034017)
关键词
根系分泌物
土壤团聚体
酶活性
土壤养分
有机质
root exudates
soil aggregate
enzyme avtivity
soil nutrient
organic matter
