Phosphorus availability and microbial community in the rhizosphere of intercropped cereal and legume along a P-fertilizer gradient

Tang, Xiaoyan; Placella, Sarah A.; Daydé, Florent; Bernard, Lætitia; Robin, Agnès; Journet, Etienne-Pascal; Justes, Éric; Hinsinger, Philippe

doi:10.1007/s11104-016-2949-3

Cited by 89 publications

(72 citation statements)

References 67 publications

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“…, Tang et al. ). Finally, we found that the yield stability of mixtures from one growing season to the next is generally higher than that of monocultures, a potentially important factor for farmers as climate‐influenced environment conditions become more variable.…”

Section: Discussionmentioning

confidence: 99%

Cultivar mixtures: a meta‐analysis of the effect of intraspecific diversity on crop yield

Reiss

Drinkwater

2017

Ecological Applications

194

163

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Abstract. Extensive research has shown that greater plant community diversity leads to higher levels of productivity and other ecosystem services, and such increased diversity has been suggested as a way to improve yield and agricultural sustainability. Increasing intraspecific diversity with cultivar mixtures is one way to increase diversity in agricultural systems. We examined the relationship between intraspecific diversity and yield in cultivar mixtures using a meta-analysis of 91 studies and >3,600 observations. Additionally, we investigated how environmental and management factors might influence this relationship, and if the yield stability of cultivar mixtures differed from that of monocultures. We found that the yield increased by 2.2% overall in cultivar mixtures relative to their monoculture components. Mixtures with more cultivars and those with more functional trait diversity showed higher relative yields. Under biotic stressors, such as disease pressure, and abiotic stressors, such as low levels of soil organic matter and nutrient availability, this diversity effect was stronger, resulting in higher relative yields. Finally, cultivar mixtures generally showed higher yield stability compared to monocultures, especially in response to annual weather variability at a site over time. This practice of mixing cultivars can be integrated into intensified cropping systems where species monocultures dominate, as well as in smallholder cropping systems where low-cost improvements are in demand. Overall, these results suggest that cultivar mixtures are a viable strategy to increase diversity in agroecosystems, promoting increased yield and yield stability, with minimal environmental impact.

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Section: Discussionmentioning

confidence: 99%

Cultivar mixtures: a meta‐analysis of the effect of intraspecific diversity on crop yield

Reiss

Drinkwater

2017

Ecological Applications

194

163

View full text Add to dashboard Cite

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“…, Tang et al. ), such as low N availability. For instance, facilitative interactions between legume and non‐legume crops are more important for maintaining productivity in zero N fertilizer than in high N fertilizer systems (Russell et al.…”

Section: Introductionmentioning

confidence: 99%

Crop rotations for increased soil carbon: perenniality as a guiding principle

King

Blesh

2017

Ecological Applications

148

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Abstract. More diverse crop rotations have been promoted for their potential to remediate the range of ecosystem services compromised by biologically simplified grain-based agroecosystems, including increasing soil organic carbon (SOC). We hypothesized that functional diversity offers a more predictive means of characterizing the impact of crop rotations on SOC concentrations than species diversity per se. Furthermore, we hypothesized that functional diversity can either increase or decrease SOC depending on its associated carbon (C) input to soil. We compiled a database of 27 cropping system sites and 169 cropping systems, recorded the species and functional diversity of crop rotations, SOC concentrations (g C kg/soil), nitrogen (N) fertilizer applications (kg NÁha ). We categorized crop rotations into three broad categories: grain-only rotations, grain rotations with cover crops, and grain rotations with perennial crops. We divided the grain-only rotations into two sub-categories: cereal-only rotations and those that included both cereals and a legume grain. We compared changes in SOC and C input using mean effect sizes and 95% bootstrapped confidence intervals. Cover cropped and perennial cropped rotations, relative to grain-only rotations, increased C input by 42% and 23% and SOC concentrations by 6.3% and 12.5%, respectively. Within grain-only rotations, cereal + legume grain rotations decreased total C input (À16%), root C input (À12%), and SOC (À5.3%) relative to cereal-only rotations. We found no effect of species diversity on SOC within grain-only rotations. N fertilizer rates mediated the effect of functional diversity on SOC within grain-only crop rotations: at low N fertilizer rates (≤75 kg NÁha ), the decrease in SOC with cereal + legume grain rotations was less than at high N fertilizer rates. Our results show that increasing the functional diversity of crop rotations is more likely to increase SOC concentrations if it is accompanied by an increase in C input. Functionally diverse perennial and cover cropped rotations increased both C input and SOC concentrations, potentially by exploiting niches in time that would otherwise be unproductive, that is, increasing the "perenniality" of crop rotations.

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“…Positive plant-plant interactions, such as root-root facilitation, have been shown to play a significant role for P acquisition (Li et al 2007;Brooker et al 2015;Li et al 2016;Zhang et al 2016). Tang et al (2016) further demonstrated the greater performance of such intercropping systems compared to single crop systems under field conditions along a P fertility gradient. They showed that the overyielding of the intercrops occurred at all levels of P fertility, discounting the stress gradient theory predicting more positive plant-plant interactions to occur under low P conditions.…”

Section: Nutrient Acquisition and Nutrient Cyclingmentioning

confidence: 92%