Preceding crop and weed management history affect denitrification and denitrifier community structure throughout the development of durum wheat

Gulden, Robert H.; Tenuta, Mario; Mitchell, Susan M.; Langarica-Fuentes, Adrián; Daniell, Tim J.

doi:10.1016/j.agee.2015.06.016

Cited by 6 publications

(5 citation statements)

References 73 publications

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“…() observed that nirS ‐, nirK ‐, and nosZ ‐communities only increased in the two treatments fertilized with pig manure alone or in combination with mineral fertilizers. Other practices such as direct seeding, mulch‐based cropping, and weediness were shown to affect the abundance of denitrifier communities (Baudoin et al., ; Gulden, Tenuta, Mitchell, Langarica Fuentes, & Daniell, ). Similarly to the measured activities, the lack of significant differences in the abundance of N‐cycling communities in our study could be due to very small shifts in soil properties between studied practices at our experimental sites (Table S1).…”

Section: Discussionmentioning

confidence: 99%

Peaks of in situ N₂O emissions are influenced by N₂O‐producing and reducing microbial communities across arable soils

Domeignoz‐Horta

Philippot

Peyrard

et al. 2017

Global Change Biology

125

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Agriculture is the main source of terrestrial N 2 O emissions, a potent greenhouse gas and the main cause of ozone depletion. The reduction of N 2 O into N 2 by microorganisms carrying the nitrous oxide reductase gene (nosZ) is the only known biological process eliminating this greenhouse gas. Recent studies showed that a previously unknown clade of N 2 O-reducers (nosZII) was related to the potential capacity of the soil to act as a N 2 O sink. However, little is known about how this group responds to different agricultural practices. Here, we investigated how N 2 Oproducers and N 2 O-reducers were affected by agricultural practices across a range of cropping systems in order to evaluate the consequences for N 2 O emissions. The abundance of both ammonia-oxidizers and denitrifiers was quantified by real-time qPCR, and the diversity of nosZ clades was determined by 454 pyrosequencing.Denitrification and nitrification potential activities as well as in situ N 2 O emissions were also assessed. Overall, greatest differences in microbial activity, diversity, and abundance were observed between sites rather than between agricultural practices at each site. To better understand the contribution of abiotic and biotic factors to the in situ N 2 O emissions, we subdivided more than 59,000 field measurements into fractions from low to high rates. We found that the low N 2 O emission rates were mainly explained by variation in soil properties (up to 59%), while the high rates were explained by variation in abundance and diversity of microbial communities (up to 68%). Notably, the diversity of the nosZII clade but not of the nosZI clade was important to explain the variation of in situ N 2 O emissions. Altogether, these results lay the foundation for a better understanding of the response of N 2 O-reducing bacteria to agricultural practices and how it may ultimately affect N 2 O emissions.

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Section: Discussionmentioning

confidence: 99%

Peaks of in situ N₂O emissions are influenced by N₂O‐producing and reducing microbial communities across arable soils

Domeignoz‐Horta

Philippot

Peyrard

et al. 2017

Global Change Biology

125

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“…Although we know little about the large-scale distribution patterns of functional microorganisms in agricultural soil ecosystems, some functional microbial groups, such as denitrifiers, behave differently compared to the overall microbial community in soils (Henry et al, 2006). It was reported that the community structures and functions of bacterial denitrifiers are more sensitive to anthropogenic influences (Chen et al, 2010; Liu et al, 2012; Gulden et al, 2015). Long-term fertilization and crop cultivation might enrich some bacterial denitrifying communities in agricultural soils.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Fungal nirK-Containing Communities and N2O Emission From Fungal Denitrification in Arable Soils

Sheng

Xing

et al. 2019

Front. Microbiol.

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Fungal denitrifiers play important roles in soil nitrogen cycling, but we have very limited knowledge about their distribution and functions in ecosystems. In this study, three types of arable soils were collected across different climate zones in China, including quaternary red clay soils, alluvial soils, and black soils. The composition and abundance of fungal nirK-containing denitrifiers was determined by MiSeq high-throughput sequencing and qPCR, respectively. Furthermore, a substrate-induced inhibition approach was used to explore N2O emissions from fungal denitrification. The results showed that the arable soils contained a wide range of nirK-containing fungal denitrifiers, with four orders and eight genera. Additionally, approximately 57.30% of operational taxonomic unit (OTUs) belonged to unclassified nirK-containing fungi. Hypocreales was the most predominant order, with approximately 40.51% of the total number of OTUs, followed by Sordariales, Eurotiales, and Mucorales. It was further indicated that 53% of fungal nirK OTUs were shared by the three types of soils (common), and this group of fungi comprised about 98% of the total relative abundance of the nirK-containing population, indicating that the distribution of fungal nirK-containing denitrifiers was quite homogenous among the soil types. These common OTUs were determined by multiple soil characteristics, while the composition of unique OTUs was manipulated by the specific properties of each soil type. Furthermore, fungal N2O emissions were significantly and positively correlated with fungal nirK abundance in the soils, whereas it was not clearly related to fungal nirK compositions. In conclusion, although the arable soils hosted diverse nirK-containing fungal denitrifiers, fungal nirK compositions were highly homogenous among the soil types, which could be a consequence of enduring agricultural practices. The abundance of fungal nirK-containing denitrifiers, rather than their composition, may play more significant roles in relation to N2O emission from fungal denitrification.

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“…Many factors are involved in the inconsistent rotational effects, such as soil type [61] and agronomic practices [91]. For example, weed management practices affect soil chemical properties (such as denitrification and denitrifier community structure), thereby affecting the rotational outcomes of durum wheat [91]. These results show that the outcomes of substituting conventional summerfallow with annual pulses or small-seeded oilseeds for durum wheat productivity may depend on soil type, moisture availability, and agronomic practices.…”

Section: Soil Microbiomementioning

confidence: 92%

“…In Orthic Black Chernozemic soils in southern Manitoba, which is outside the durum wheat area, wheat-flax-durum and canola-flax-durum rotations repeated for three cycles showed that canola-flax as preceding crops led to greater subsequent durum wheat yield than wheat-flax as the previous crops in only one out of six site-years [90]. Many factors are involved in the inconsistent rotational effects, such as soil type [61] and agronomic practices [91]. For example, weed management practices affect soil chemical properties (such as denitrification and denitrifier community structure), thereby affecting the rotational outcomes of durum wheat [91].…”

Section: Soil Microbiomementioning

confidence: 99%

Agronomic Advancement in Tillage, Crop Rotation, Soil Health, and Genetic Gain in Durum Wheat Cultivation: A 17-Year Canadian Story

Niu

Ruan

et al. 2018

Agronomy

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The global demands for various grains, including durum wheat (Triticum turgidum L. subsp. durum (Desf.) Husn.), are expected to increase substantially in the coming years, due to the ever-growing human population’s needs for food, feed, and fuel. Thus, providing consistent or increased durum grain to the world market is one of the priorities for policy-makers, researchers, and farmers. What are the major achievements in agronomic advancement for durum wheat cultivation in recent decades? How might the current cropping systems be improved to increase crop yield and quality and improve resource use efficiencies while minimizing input costs and decreasing negative impact on the environment? Canada is one of the major durum wheat producers in the world, as Canada contributes about 50% to global trade of durum grain. Canada’s research achievements in durum wheat might serve as a guide for advancing the cultivation of the crop in other regions/countries on the planet. This review summarizes the major Canadian research findings in the aspects of durum wheat agronomics during the period 2001 to 2017 years. It highlights the main advancements in seeding and tillage, crop rotation and diversification, and use of pulse-induced microbiomes to improve soil health and feedback mechanisms. The genetic gain and breeding for resistance against abiotic and biotic stresses are discussed. Finally, we identified the main constraints and suggested some near-term research priorities. The research findings highlighted in this review will be of use for other areas on the planet to increase durum wheat productivity, improve soil fertility and health, and enhance long-term sustainability.

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Preceding crop and weed management history affect denitrification and denitrifier community structure throughout the development of durum wheat

Cited by 6 publications

References 73 publications

Peaks of in situ N₂O emissions are influenced by N₂O‐producing and reducing microbial communities across arable soils

Peaks of in situ N₂O emissions are influenced by N₂O‐producing and reducing microbial communities across arable soils

Characterization of Fungal nirK-Containing Communities and N2O Emission From Fungal Denitrification in Arable Soils

Agronomic Advancement in Tillage, Crop Rotation, Soil Health, and Genetic Gain in Durum Wheat Cultivation: A 17-Year Canadian Story

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Preceding crop and weed management history affect denitrification and denitrifier community structure throughout the development of durum wheat

Cited by 6 publications

References 73 publications

Peaks of in situ N2O emissions are influenced by N2O‐producing and reducing microbial communities across arable soils

Peaks of in situ N2O emissions are influenced by N2O‐producing and reducing microbial communities across arable soils

Characterization of Fungal nirK-Containing Communities and N2O Emission From Fungal Denitrification in Arable Soils

Agronomic Advancement in Tillage, Crop Rotation, Soil Health, and Genetic Gain in Durum Wheat Cultivation: A 17-Year Canadian Story

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Peaks of in situ N₂O emissions are influenced by N₂O‐producing and reducing microbial communities across arable soils

Peaks of in situ N₂O emissions are influenced by N₂O‐producing and reducing microbial communities across arable soils