Plant Growth-Promoting Rhizobacteria Allow Reduced Application Rates of Chemical Fertilizers
Plant Growth-Promoting Rhizobacteria Allow Reduced Application Rates of Chemical Fertilizers
复制标题
DOI：
10.1007/s00248-009-9531-y
复制
发表时间：
2009-11-01
影响因子：
3.6
通讯作者：
Kloepper, J. W.
中科院分区：
文献类型：
--
作者：
Adesemoye, A. O.;Torbert, H. A.;Kloepper, J. W.
由于肥料成本的增加及其对环境的一些负面影响，寻找提高土壤肥力和增强植物营养的微生物一直吸引着人们的注意。本温室番茄研究的目的是确定（1）减少无机肥料与微生物接种剂结合的比例是否会产生与全量肥料相当的植物生长、产量和养分吸收水平，以及（2）使用接种剂时肥料可以减少的最低水平。研究中使用的微生物接种剂是植物促生根际细菌（PGPR）菌株解淀粉芽孢杆菌IN937a和短小芽孢杆菌T4（一种配制的PGPR产品）和丛枝菌根真菌（AMF）、根内球囊霉的混合物。结果表明，补充75%的推荐施肥量与接种剂产生植物生长，产量和养分（氮和磷）的吸收，统计学上相当于没有接种剂的全肥率。当接种剂使用的施肥率低于75%的推荐率，有益的效果通常是不一致的，然而，接种PGPR和AMF的混合物在70%的肥力一致产生相同的产量作为完全的肥力率没有接种剂。在没有接种剂的情况下，低于推荐施肥量的施肥量会导致植物生长、产量和养分吸收显著减少或不一致的影响。结果表明，PGPR为基础的接种剂可以使用，并应进一步评估的综合养分管理策略的组成部分。
The search for microorganisms that improve soil fertility and enhance plant nutrition has continued to attract attention due to the increasing cost of fertilizers and some of their negative environmental impacts. The objectives of this greenhouse study with tomato were to determine (1) if reduced rates of inorganic fertilizer coupled with microbial inoculants will produce plant growth, yield, and nutrient uptake levels equivalent to those with full rates of the fertilizer and (2) the minimum level to which fertilizer could be reduced when inoculants were used. The microbial inoculants used in the study were a mixture of plant growth-promoting rhizobacteria (PGPR) strains Bacillus amyloliquefaciens IN937a and Bacillus pumilus T4, a formulated PGPR product, and the arbuscular mycorrhiza fungus (AMF), Glomus intraradices. Results showed that supplementing 75% of the recommended fertilizer rate with inoculants produced plant growth, yield, and nutrient (nitrogen and phosphorus) uptake that were statistically equivalent to the full fertilizer rate without inoculants. When inoculants were used with rates of fertilizer below 75% of the recommended rate, the beneficial effects were usually not consistent; however, inoculation with the mixture of PGPR and AMF at 70% fertility consistently produced the same yield as the full fertility rate without inoculants. Without inoculants, use of fertilizer rates lower than the recommended resulted in significantly less plant growth, yield, and nutrient uptake or inconsistent impacts. The results suggest that PGPR-based inoculants can be used and should be further evaluated as components of integrated nutrient management strategies.