摘要
通过摇瓶和盆栽试验,研究了东北黑土区大豆根际3株优势促生菌(FN,PD和SB)的生长条件和对大豆的促生效应。结果表明:3株大豆促生菌的最适温度均为25℃;FN在pH值5.0～9.0范围内生物量变化不大,PD和SB的最适pH值为5.0;1.0 g.L-1MnSO4对FN的生长具有一定的促进作用,PD受MnSO4抑制明显,MnSO4能够显著促进SB的生长;MgSO4能够加快FN的生长,PD和SB均在MgSO4浓度为1.0 g.L-1时生物量最大;FN和PD的生长最适盐分浓度均为1.0 g.L-1,SB的生物量与盐分浓度正相关;不同的菌剂对大豆的株高、茎粗、根干重、根鲜重、植株干重、植株鲜重和根冠比均有一定促进作用,FN+PD+SB处理对大豆的促生效果最好,3种菌株对大豆的促生效果中存在协同效应机制。
In order to elucidate the growth-promoting effects of soybean plant growth-promoting rhirobacteria（PGPR）,shake flasks and pot experiments were set to study the growth conditions and effects of three soybean PGPRs（FN,PD and SB） in the black soil region of northeast China.The results showed that optimum temperatures of three soybean PGPRs were 25℃.The biomass of FN changed little at pH 5.0-9.0 and the optimum pH of PD and SB were 5.0.MnSO4 to FN had a weak role in promoting growth at 1.0 g·L-1,PD was significantly inhibited by MnSO4,MnSO4 could significantly promote the growth of SB.MgSO4 could accelerate the growth of FN,the biomass of PD and SB were maximized when the concentration of MgSO4 were 1.0 g·L-1.The optimal salt concentrations of FN and PD were 1.0 g·L-1,the biomass of SB positively correlated with the concentration of salt.Different strains had a certain role in promoting agronomic traits of soybean,such as plant height,stem diameter,root dry weight and fresh weight,plant dry weight and fresh weight and root shoot ratio,etc.Because FN＋PD＋SB treatment had the best growth-promoting effect on soybean,we speculated the synergies should exist among three strains.
出处
《大豆科学》
CAS
CSCD
北大核心
2012年第2期270-273,277,共5页
Soybean Science
基金
齐齐哈尔大学青年科研启动支持计划(2010k-M10)
黑龙江省教育厅科学技术研究资助项目(11551539)
关键词
东北黑土
大豆
根际促生菌
促生效应
Black soil region of northeast China
Soybean
Plant growth-promoting rhizobacteria
Growth-promoting effect
