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首页> 外文期刊>African Journal of Biotechnology >Enhancing 15N-uptake in maize (Zea mays L.) by native Trichoderma spp. strains in Central Mexico
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Enhancing 15N-uptake in maize (Zea mays L.) by native Trichoderma spp. strains in Central Mexico

机译：天然木霉属物种提高玉米（Zea mays L.）的15N吸收。墨西哥中部的菌株

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A study was undertaken to evaluate the role of Trichoderma strains on 15N-uptake by maize under greenhouse and field conditions. The Trichoderma strains were isolated from different maize production systems in Guanajuato State, Central Mexico. A total of 39 Trichoderma isolates were obtained, 23 correspond to Trichoderma harzianum (Intra-Genic-Segment). Some colonized the endorhizosphere of maize better than others; however, Trichoderma diversity did not correlate with the maize production system (rainfall vs. irrigation conditions). In greenhouse conditions, biomass production and 15N-uptake were equally variable; maize plants inoculated with selected Trichoderma species (high root colonization) and fertilized with 140 mg N kg-1 soil, showed similar increase in grain yield and 15N-uptake vs. those fertilized with 280 mg N kg-1 soil. Biomass and 15N-uptake directly correlated with the capacity of Trichoderma spp. to colonize the rhizosphere. Under field conditions, the N-fertilizer use efficiency was the highest when maize cv. P30G40 was inoculated with T. harzianum T35 at a N fertilization rate of 180 kg N ha-1 (78%). All measured parameters showed positive effects of inoculation under-scoring the feasibility of inoculants with these fungi based on Trichoderma to increase the N-fertilizer use efficiency applied to maize.
机译：进行了一项研究，以评估木霉菌株在温室和田间条件下对玉米吸收15N的作用。木霉菌株是从墨西哥中部瓜纳华托州的不同玉米生产系统中分离出来的。总共获得了39种木霉菌分离株，其中23种对应于哈茨木霉（基因内片段）。一些人比其他人更好地占领了玉米的根际。然而，木霉的多样性与玉米生产系统无关（降雨与灌溉条件）。在温室条件下，生物量的产生和15N的吸收是同等可变的。接种特定木霉菌种（高根定植）并施以140 mg N kg-1的土壤的玉米植株，与施以280 mg N kg-1的土壤相比，其谷物产量和15 N吸收量具有相似的增长。生物量和15N摄取与木霉属菌种的能力直接相关。殖民根际。在田间条件下，玉米cv的氮肥利用率最高。 P30G40用哈茨木霉T35接种，氮肥施用量为180 kg N ha-1（78％）。所有测得的参数均显示了接种的积极效果，从而强调了接种这些木霉属真菌的接种剂提高玉米氮肥利用率的可行性。

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