摘要
采用室内恒温箱培养方法,探讨2种豆科绿肥残体对连作蕉园土壤理化性质和可培养微生物数量的影响。以连作障碍严重的蕉园土壤为研究背景,共设置4个处理:无残体添加(CK)、添加田菁残体(S)、添加白三叶残体(W)和添加香蕉残体(B)。结果表明:(1)在培养第5天时,与CK相比,B、S和W添加后均增加了土壤可培养尖孢镰刀菌、真菌、细菌的数量;然而在培养第45天,S和W尖孢镰刀菌数量逐渐下降。45d时,与B相比,S和W尖孢镰刀菌数量分别降低33.09%和79.92%;(2)与CK和B相比,S显著降低土壤pH,而W能显著提高pH和速效钾含量;(3)主坐标分析(PCoA)和多元回归树分析(MRT)结果均说明,添加不同豆科绿肥残体(S和W)与CK差异显著,说明不同豆科绿肥残体添加可改善土壤肥力。因此,在高发病香蕉园地,间套作白三叶可改善其土壤理化和土壤可培养微生物状况,对香蕉连作障碍有较好的缓解作用。
Four treatments(without residues(CK),adding Sesbania residues(S),adding Trifolium repens residues(W)and adding banana residues(B))by the thermostatic indoor incubator method were conducted to identify the effects of leguminous green manure residues on the soil fertility of continuous cropping banana plantation.The change of soil physical and chemical properties,cultivable microorganisms after adding plant residues were investigated.Adding plant residues of Sesbania(S),T.repens residues(W)and banana(B)could improve the amount of cultivated Fusarium oxysporum,fungi and bacteria on the fifth day of incubation,compared with K.However,the number of F.oxysporum declined after adding S,W 45 days after.Compared with B,S and W could reduce the amount of F.oxysporum by 33.09%and 79.92%,respectively.Compared with CK and B,S pH significantly decreased,while pH and available potassium content significantly increased in W.The principal component analysis(PCoA)and multiple regression tree analysis(MRT)showed significant difference in S and W with CK,indicting that the soil fertility could be improved by applying legume green manure residues.Therefore,we can improve the soil physical and chemical properties,and the soil microbial cultivability to alleviate the continuous cropping obstacle of banana by intercropping T.repens in banana fields.
作者
杨劲明
王禹童
陈冰
刘满意
王蓓蓓
阮云泽
赵艳
YANG Jinming;WANG Yutong;CHEN Bing;LIU Manyi;WANG Beibei;RUAN Yunze;ZHAO Yan(College of Tropical Crops,Hainan University/Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource,Haikou,Hainan 570228,China)
出处
《热带作物学报》
CSCD
北大核心
2020年第3期433-440,共8页
Chinese Journal of Tropical Crops
基金
国家自然科学基金项目(No.41867006)
海南省自然科学基金项目(No.317040)
国家重点基础研究发展计划项目(No.2015CB150503)。
关键词
香蕉
田菁
白三叶
土壤微生物
主坐标分析
多元回归树分析
banana
Sesbania cannabina Pers.
Trifolium repens
soil microorganism
principal component analysis
multiple regression tree analysis
