不同用量珊瑚钙质砂对生菜生长及土壤性质的影响

Modernizing Agriculture(2020)

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Abstract
该研究采用盆栽试验,研究了不同用量珊瑚钙质砂对生菜生长及酸性砖红壤理化性质的影响.结果 表明,砖红壤中添加2.0g/kg和5.0g/kg钙质砂能提升土壤pH、电导率和交换性钙镁含量,而显著降低土壤交换性酸和交换性铝含量;同时提升生菜的株高、展开度、叶片数、地上鲜重、地上干重、根长和SPAD等指标,降低其根冠比.综合考虑,采用粉碎珊瑚钙质砂改良热带酸性土壤,用量以2.0g/kg左右为宜.
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