Suppression of Fusarium wilt of spinach with compost amendments

被引:29
作者
Escuadra, Gina M. Edurise [1 ]
Amemiya, Yoshimiki [1 ]
机构
[1] Chiba Univ, Grad Sch Hort, Chiba 2718510, Japan
关键词
compost; disease suppression Fusarium wilt; Fusarium oxysporum f. sp spinaciae; microbial activity; spinach;
D O I
10.1007/s10327-008-0090-8
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The effect of different organic composts on the suppression of wilt disease of spinach caused by Fusarium oxysporum f. sp. spinaciae was evaluated in a continuous cropping system in both containers and in microplot field trials. Test soils infested with the pathogen were amended with wheatbran, wheatbran and sawdust, coffee grounds, chicken manure, or mixture of different composts with and without 5% (w/w) crab shell powder either once (5%, w/w) or continuously (2.5%) into the test soils infested with the pathogen. In the container trials, the soil amended with composts became suppressive to disease development on the second and third cropping. The suppressive effect was notable in the soil amended with the mixture of compost with and without crab shell powder. The coffee compost lowered soil pH but became suppressive to the disease after modifying the soil pH. In the field trial using the mixture of the different composts containing 5% crab shell powder, a combination of 5% before the first cropping and 2.5% every second cropping gave stable disease control and promoted plant growth. After compost amendment, populations of fungi, bacteria and actinomycetes as measured by dilution plate counting and the total microbial activity as evaluated by fluorescein diacetate hydrolysis increased and population of the pathogen gradually decreased. These phenomena were especially notable in soils amended with the mixture of different composts. These results indicate that diversity in the organic materials promotes higher microbial activity and population in the soil thereby enhancing disease suppressiveness.
引用
收藏
页码:267 / 274
页数:8
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