生物炭对棕壤大豆根际微生物的影响

被引：27

作者：

孙大荃

孟军

张伟明

黄玉威

管学超

陈温福

机构：

[1] 沈阳农业大学辽宁生物炭工程技术研究中心

来源：

沈阳农业大学学报 | 2011年 / 05期

关键词：

生物炭; 根际微生物; 土壤pH;

D O I：

暂无

中图分类号：

S154.3 [土壤微生物学]; S565.1 [大豆];

学科分类号：

摘要：

为了探讨生物炭对棕壤大豆根际微生物群体的影响,试验设置CK(0kg.hm-2),C1(750kg.hm-2),C2(1500kg.hm-2),C3(3000kg.hm-2),C4(6000kg.hm-2)5个生物炭梯度,分别在大豆苗期、开花期、结荚期、鼓粒期和成熟期测定土壤微生物数量、pH值和田间持水量的动态变化,并观察微生物在炭粒与土粒中的分布情况。结果表明:多数生育期生物炭处理提高大豆根际土壤中细菌数量,最高增加94.9%;前4个生育期,与CK相比真菌和放线菌数量减少,分别减少13.6倍和47.2%,但成熟期C4真菌增加0.51倍,而放线菌则提高2.09%。细菌真菌比例提高,成熟期C4比CK高70.7%。土壤pH提高,成熟期C4比CK高5.6%。炭粒中微生物数量少于土粒。通过增加土壤细菌与真菌数量比例,以及提高pH,生物炭可能成为缓解大豆连作障碍的土壤改良剂。

引用

页码：521 / 526

页数：6

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