生物炭和石灰对红壤理化性质及烟草苗期生长影响的差异

被引:41
作者
朱盼 [1 ,2 ]
应介官 [1 ,2 ]
彭抒昂 [3 ]
姜存仓 [1 ,2 ]
机构
[1] 华中农业大学资源与环境学院
[2] 农业部长江中下游耕地保育重点实验室
[3] 华中农业大学园艺与林学学院
关键词
生物炭; 石灰; 红壤; 烟草; 土壤性质;
D O I
10.13254/j.jare.2015.0152
中图分类号
S153 [土壤化学、土壤物理化学]; S572 [烟草(菸草)];
学科分类号
090104 [作物信息科学与技术]; 090301 [土壤学];
摘要
我国南方红壤普遍存在酸性强、铝毒和有效养分含量低等特性,本文研究了生物炭和石灰对红壤理化性质及烟草生长的差异,为烟田红壤改良提供理论基础。采用盆栽试验,设置0、0.5%、1%、2%生物炭用量与传统石灰用量(0.3%)等5个处理,研究了其对红壤pH值、交换性铝和锰、有效态矿质养分含量,以及烟草农艺性状、烟叶矿质养分含量等的影响。结果表明:施用生物炭或石灰后,烟草株高、茎粗和叶片数目等农艺性状明显改善,生物量显著提高。0.5%和1%生物炭处理烟叶的N、P、K、Ca和Mg含量较对照处理明显提高,但2%生物炭处理,烟叶N含量比对照处理降低了9.3%。与对照处理相比,石灰处理中烟叶的N、P和Ca含量增加,K和Mg含量下降。施用生物炭和石灰均能够提高红壤p H值,降低其交换性铝含量;且施用生物炭土壤的碱解氮、速效磷、速效钾、交换性钙和交换性镁含量均高于对照处理;而石灰处理仅交换性钙含量增加,交换性锰含量则减少。因此,施用生物炭和石灰均能促进红壤中烟草的生长,并有效改善红壤的理化性状。
引用
收藏
页码:590 / 595
页数:6
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