Fungal diversity associated with pulses and its influence on the subsequent wheat crop in the Canadian prairies

Borrell, Adriana Navarro; Shi, Yaoyao; Gan, Yantai; Bainard, Luke D.; Germida, James J.; Hamel, Chantal

doi:10.1007/s11104-016-3075-y

Cited by 58 publications

(43 citation statements)

References 69 publications

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“…Furthermore, the inclusion of annual legumes in cropping systems via either legume-cereal intercropping or cereal-legume rotations can significantly reduce the use of synthetic N fertilizer [43,44], as the legumes fix N 2 O from the atmosphere [45]. Such a legume-cereal system can provide significant ecological and environmental benefits by reducing carbon emissions [27,46], lowering the environmental footprint [47,48] and enhancing soil and ecological sustainability [49,50].…”

Section: Discussionmentioning

confidence: 99%

Agronomic and Economic Benefits of Pea/Maize Intercropping Systems in Relation to N Fertilizer and Maize Density

2018

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Abstract:Intercropping has been shown to increase crop yields and improve land utilization in many cases but it is unknown how the interspecies relationship is enhanced with improved crop management schemes. In this study, we investigated the effect of different maize densities and N rates on the growth, crop yields and economic benefits of pea (Pisum sativum L.)/maize (Zea mays L.) intercropping. The results indicated that total yields of pea/maize intercropping were higher than the yield of maize alone, and that pea/maize intercropping improved land use efficiency significantly compared to sole crops, the partial land equivalent ratio (LER) of maize and pea with high planting density increased from 0.98% to 9.36% compared to low planting densities during 2012 and 2013. The pea strips provided significant compensatory effects on the growing maize after the earlier-sown, shorter-seasoned pea was harvested. The crop growth rate (CGR) of the intercropped maize was 18.5% to 216.9% greater than that of sole maize after pea harvest, the leaf area index (LAI) of pea/maize intercropping was 6.9% and 45.4% greater compared with the weighted average of sole maize and sole pea in 2012 and 2013, respectively. Net returns and benefit to cost ratios of pea/maize intercropping were increased with an increase of maize planting density. A low rate of N fertilizer was coupled with increased maize plant density, allowing interspecific facilitation to be fully expressed, thus improving the land utilization rate and increasing economic benefits. Overall, our findings show that a higher density of maize and lower N application can be used to increase grain production with no adverse effects on the growth components of either pea or maize crops. It could be considered an advanced farming system for agricultural sustainable development in the oasis region of northwest China.

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Section: Discussionmentioning

confidence: 99%

Agronomic and Economic Benefits of Pea/Maize Intercropping Systems in Relation to N Fertilizer and Maize Density

2018

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“…The selective effects of crop species on microbial communities can be very specific. For instance, it was shown that chickpea, lentil, and pea have different root‐associated fungal communities in general, but that AMF communities do not differ between the three crops (Borrell et al, ). Besides interspecies variation, microbial composition in the rhizosphere also differs between genotypes of the same species and Coleman‐Derr and Tringe () highlighted the role of microbial communities to confer stress tolerance to their host plants.…”

Section: Complex Interactions Between Grain Legumes and Their Root‐asmentioning

confidence: 99%

Insights to plant–microbe interactions provide opportunities to improve resistance breeding against root diseases in grain legumes

Wille

Messmer

Studer

et al. 2018

Plant Cell & Environment

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Root and foot diseases severely impede grain legume cultivation worldwide. Breeding lines with resistance against individual pathogens exist, but these resistances are often overcome by the interaction of multiple pathogens in field situations. Novel tools allow to decipher plant-microbiome interactions in unprecedented detail and provide insights into resistance mechanisms that consider both simultaneous attacks of various pathogens and the interplay with beneficial microbes. Although it has become clear that plant-associated microbes play a key role in plant health, a systematic picture of how and to what extent plants can shape their own detrimental or beneficial microbiome remains to be drawn. There is increasing evidence for the existence of genetic variation in the regulation of plant-microbe interactions that can be exploited by plant breeders. We propose to consider the entire plant holobiont in resistance breeding strategies in order to unravel hidden parts of complex defence mechanisms. This review summarizes (a) the current knowledge of resistance against soil-borne pathogens in grain legumes, (b) evidence for genetic variation for rhizosphere-related traits, (c) the role of root exudation in microbe-mediated disease resistance and elaborates (d) how these traits can be incorporated in resistance breeding programmes.

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“…Furthermore, the outcome of the recovery effect may be related to other soil-related factors because soil environments in the rooting zone are complex in nature and are affected by many factors, such as soil water availability (Niu et al, 2017), and soil physical (Luo et al, 2017), chemical (Grant et al, 2016), and biological (Taheri et al, 2016) properties. Agronomic practices may also affect the outcome of the recovery such as preceding crops in the rotation (Luce et al, 2016), tillage practices (Lupwayi et al, 2015), and soil microbial community structure and functionalities (Borrell et al, 2016). There is a need to elucidate those effects in the future studies to improve our understanding of the mechanisms responsible for the yield advantages of intercropping systems.…”

Section: Discussionmentioning

confidence: 99%

Interspecies Interactions in Relation to Root Distribution Across the Rooting Profile in Wheat-Maize Intercropping Under Different Plant Densities

Wang

Qin²,

Chai

et al. 2018

Front. Plant Sci.

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In wheat-maize intercropping systems, the maize is often disadvantageous over the wheat during the co-growth period. It is unknown whether the impaired growth of maize can be recovered through the enhancement of the belowground interspecies interactions. In this study, we (i) determined the mechanism of the belowground interaction in relation to root growth and distribution under different maize plant densities, and (ii) quantified the “recovery effect” of maize after wheat harvest. The three-year (2014–2016) field experiment was conducted at the Oasis Agriculture Research Station of Gansu Agricultural University, Wuwei, Northwest China. Root weight density (RWD), root length density (RLD), and root surface area density (RSAD), were measured in single-cropped maize (M), single-cropped wheat (W), and three intercropping systems (i) wheat-maize intercropping with no root barrier (i.e., complete belowground interaction, IC), (ii) nylon mesh root barrier (partial belowground interaction, IC-PRI), and (iii) plastic sheet root barrier (no belowground interaction, IC-NRI). The intercropped maize was planted at low (45,000 plants ha−1) and high (52,000 plants ha−1) densities. During the wheat/maize co-growth period, the IC treatment increased the RWD, RLD, and RSAD of the intercropped wheat in the 20–100 cm soil depth compared to the IC-PRI and IC-NRI systems; intercropped maize had 53% lower RWD, 81% lower RLD, and 70% lower RSAD than single-cropped maize. After wheat harvest, the intercropped maize recovered the growth with the increase of RWD by 40%, RLD by 44% and RSAD by 11%, compared to the single-cropped maize. Comparisons among the three intercropping systems revealed that the “recovery effect” of the intercropped maize was attributable to complete belowground interspecies interaction by 143%, the compensational effect due to root overlap by 35%, and the compensational effect due to water and nutrient exchange (CWN) by 80%. The higher maize plant density provided a greater recovery effect due to increased RWD and RLD. Higher maize plant density stimulated greater belowground interspecies interaction that promoted root growth and development, strengthened the recovery effect, and increased crop productivity.

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Fungal diversity associated with pulses and its influence on the subsequent wheat crop in the Canadian prairies

Cited by 58 publications

References 69 publications

Agronomic and Economic Benefits of Pea/Maize Intercropping Systems in Relation to N Fertilizer and Maize Density

Agronomic and Economic Benefits of Pea/Maize Intercropping Systems in Relation to N Fertilizer and Maize Density

Insights to plant–microbe interactions provide opportunities to improve resistance breeding against root diseases in grain legumes

Interspecies Interactions in Relation to Root Distribution Across the Rooting Profile in Wheat-Maize Intercropping Under Different Plant Densities

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