摘要
为揭示连作对富贵竹根际土壤理化性状的影响,本研究以连作0年(CK)、3年、6年、9年、12年的富贵竹根际土壤为材料,分析连作年限对土壤理化指标的影响。结果表明:随着连作年限的增加,根际土壤容重逐渐增大,pH值逐渐降低,有酸化趋势;土壤EC值在30.33~58.02μS/cm之间,随着连作年限的增加,呈先降后升再降的趋势,在连作9年时达到最大值;根际土壤有机质含量随着连作年限的增加呈下降趋势,其中连作12年的土壤有机质含量仅为CK的58.55%;氮、磷、钾含量会受到人工施肥等措施的影响,在小幅波动中维持相对均衡;而根际土壤交换性钙、镁含量呈逐年降低趋势,且连续种植9年以上的土壤降低显著,可见富贵竹连作消耗Ca、Mg元素相对较多,建议加强科学施肥管理,维持土壤养分平衡,是避免土壤连作障碍的有效途径。
In order to analyze the effect of continuous cropping of Dracaena sanderiana on the physicochemical properties of rhizosphere soil,the rhizospheric soils with continuous cropping for 0 a(CK),3 a(treatment 1),6 a(treat-ment 2),9 a(treatment 3)and 12 a(treatment 4)were used as the materials to analyze the effect of continuous cropping span on soil physical and chemical indicators.The results indicated that the soil bulk density of the rhizosphere soil increased significantly with the increase of continuous cropping span,while the soil pH value decreased gradually,indi-cating soil acidification.The EC value of the rhizosphere soil ranged from 30.33μS/cm to 58.02μS/cm.It was decreased-increased-decreased with the increase of continuous cropping span,reached the maximum at treatment 3.The content of organic matter in rhizosphere soil decreased with the increase of continuous cropping span.The content of organic matter at treatment 4 was about 58.55%of CK.The contents of N,P and K would be affected by fertilization and other measures,which maintained relative equilibrium in fluctuations.The contents of exchangeable Ca and Mg in soil decrea-sed with the increase of continuous cropping span,and decreased obviously when the continuous cropping span excee-ded 9 a.Therefore,continuous cropping of Dracaena sanderiana consumes more Ca and Mg relatively.So it is suggested to strengthen scientific fertilization and maintain soil nutrient equilibrium,which is one of the efficient methods to avoid soil continuous cropping obstacle.
作者
陈宣
王景飞
张永豪
吕德任
杨珺
陈业光
CHEN Xuan;WANG Jingfei;ZHANG Yonghao;LYU Deren;YANG Jun;CHEN Yeguang(Institute of Tropical Horticulture,Hainan Academy of Agricultural Sciences,Haikou Hainan 571100;Chengmai Observation and Experiment Station of National Germplasm Resources,Haikou Hainan 571100)
出处
《现代农业科技》
2023年第18期127-131,138,共6页
Modern Agricultural Science and Technology
基金
海南省重点研发计划项目(ZDYF2020077)
海南省农业科学院院本级科研项目(HAAS2022PT0206)。
关键词
富贵竹
连作年限
根际土壤
理化性状
Dracaena sanderiana
continuous cropping span
rhizosphere soil
physicochemical property
