摘要
从滨海盐碱土中分离筛选到分解秸秆、产胞外聚合物的耐盐碱细菌,通过土柱和盆栽试验研究其与有机物料相互作用对盐碱土团聚体形成以及植物生长的影响。结果表明,盐碱土中接种既分解秸秆又产胞外聚合物的耐盐碱细菌(菌株M6),配施未腐熟秸秆,直接在盐碱土中腐熟分解,团聚体形成效果最好,大团聚体含量增加60%以上;施加玉米秸秆与施腐熟有机肥相比,前者更有利于盐碱土大团聚体的形成;盐碱土中接种既分解秸秆又产胞外聚合物细菌对团聚体形成的促进作用优于单功能分解秸秆细菌(菌株J2)或者分泌胞外聚合物细菌(菌株DF-2);菌株M6对盐碱环境下玉米的出苗、生长存活及干物质的积累有促进作用。
Column and pot culture experiments were carried out to study the effects of saline-alkali-tolerant bacteria screened from coastal saline-alkali soil combined with organic matter on the formation of saline-alkali soil aggregates and the growth of corn. Results showed that, the inoculation with bacterial strain M6 that can decompose straw and secrete extracellular polymer substances combined with straws that decompose directly in soil has the best effect on the formation of saline-alkali soil aggregates. The percent of large macroaggregates increased to more than 60%. Compared with the decomposed manure the und^composed straws has a better effect on the formation of saline-alkali soil aggregates. Saline-alkali soil inoculated with bacterial strain M6 has a better effect on the formation of soil aggregates compared with inoculation with bacteria of single function that can decompose straw or secrete extracellular polymer substances. Seed germination, livability and dry weight of maize were allpromoted under the inoculation with bacterial strain M6.
出处
《土壤》
CAS
CSCD
北大核心
2010年第1期111-116,共6页
Soils
关键词
耐盐碱细菌
有机物料
盐碱土
土壤团聚体
胞外聚合物
Saline-alkali -tolerant bacteria, Organic matter, Saline-alkali soil, Soil aggregates, Extracellular polymer substances
