Analysis of a large dataset of mycorrhiza inoculation field trials on potato shows highly significant increases in yield
Analysis of a large dataset of mycorrhiza inoculation field trials on potato shows highly significant increases in yield
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DOI：
10.1007/s00572-015-0661-4
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发表时间：
2016-04-01
期刊：
影响因子：
3.9
通讯作者：
Hijri, Mohamed
中科院分区：
文献类型：
--
作者：
Hijri, Mohamed
不断增长的人口需要在营养高效系统中生产更多的粮食，以便在满足全球粮食需求的同时减少农业的环境足迹。丛枝菌根真菌（AMF）具有提高作物产量的潜力，但其效率尚未在大规模作物生产系统中得到证实。本研究报告了一个数据集的分析，包括231个田间试验中，相同的AMF接种剂（Rhizophagus irregularis DAOM 197198）被施加到马铃薯超过4年的时间在北美和欧洲在真实的田间条件下。使用喷洒在马铃薯种子块上的AMF孢子的液体悬浮液进行接种，得到计算的每个种子块71个孢子。统计分析表明，与未接种对照（38.3吨/公顷）相比，接种田（42.2吨/公顷）的商品马铃薯产量（ANOVA，P < 0.0001）显著增加，与试验年份无关。平均增产3.9吨/公顷，占作物总产量的9.5%。接种是有利可图的，产量增加0.67吨/公顷，几乎79%的试验达到了这个阈值。以马铃薯为例，这一发现清楚地表明了基于菌根接种对作物产量的好处。这些有益的接种剂的进一步改进将有助于弥补现在和未来的作物生产赤字。
An increasing human population requires more food production in nutrient-efficient systems in order to simultaneously meet global food needs while reducing the environmental footprint of agriculture. Arbuscular mycorrhizal fungi (AMF) have the potential to enhance crop yield, but their efficiency has yet to be demonstrated in large-scale crop production systems. This study reports an analysis of a dataset consisting of 231 field trials in which the same AMF inoculant (Rhizophagus irregularis DAOM 197198) was applied to potato over a 4-year period in North America and Europe under authentic field conditions. The inoculation was performed using a liquid suspension of AMF spores that was sprayed onto potato seed pieces, yielding a calculated 71 spores per seed piece. Statistical analysis showed a highly significant increase in marketable potato yield (ANOVA, P < 0.0001) for inoculated fields (42.2 tons/ha) compared with non-inoculated controls (38.3 tons/ha), irrespective of trial year. The average yield increase was 3.9 tons/ha, representing 9.5 % of total crop yield. Inoculation was profitable with a 0.67-tons/ha increase in yield, a threshold reached in almost 79 % of all trials. This finding clearly demonstrates the benefits of mycorrhizal-based inoculation on crop yield, using potato as a case study. Further improvements of these beneficial inoculants will help compensate for crop production deficits, both now and in the future.