Biological and other soil parameters response to winter cover crops in a mediterranean irrigated system

González, Irene García

doi:10.20868/upm.thesis.45771

Cited by 2 publications

(4 citation statements)

References 177 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the U.S. Midwest, Lehman et al () found that the results of hairy vetch or clover monoculture did not differ from fallow, whereas forage oats or an oats–pea mixture CC did increase AMF propagules compared with fallow. Similarly, in acid soils under temperate oceanic climate in The Netherlands, two legume species (white clover and vetch) failed to stimulate AMF in contrast to the success of ryegrass ( García‐González , ). These studies agree with our findings, which suggest that in our conditions barley CC is better than vetch at retaining the indigenous AMF potential during the winter period.…”

Section: Discussionmentioning

confidence: 99%

“…Although the AMF influence was not evident, CCs did affect plant height, given that the average maize height was consistently higher after vetch and barley CCs than after fallow. This greater height may be because of the soil structure enhancement as well as the nutrient contribution of the CC, especially the N input from the legume residues, together with that coming from the mineralization of the organic matter, whose content was enhanced by both CCs ( García‐González , ). However, the positive effect of CCs on maize growth did not lead to any significant effect on either the maize biomass at harvest or yield, although we found a tendency for higher values after CCs, particularly after vetch.…”

Section: Discussionmentioning

confidence: 99%

“…A meta-analysis by Bowles et al (2017) concluded that legume CCs provided higher increases in mycorrhizal colonization compared with grasses. However, this statement needs to be better supported because discrepancies exist (Lehman et al, 2012;García-Gonzá lez, 2017). Additionally, differences in AMF because of CCs are sometimes dependent on the sampling date and not all of the indicators used to evaluate AMF are equally sensitive to time (Kabir and Koide, 2002;Deguchi et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Legacy of eight‐year cover cropping on mycorrhizae, soil, and plants

García-González

Quemada

Gabriel

et al. 2018

J. Plant Nutr. Soil Sci.

View full text Add to dashboard Cite

Cover crops (CCs) provide ecosystem services to agricultural systems by soil health enhancement. However, the long‐term legacy of CCs on arbuscular mycorrhizal fungi (AMF) and subsequent main crop performance is unclear. The main objective of this work was to assess the 8‐year legacy of CCs on AMF activity and several soil and plant parameters during a subsequent maize (Zea mays L.) crop. The study was conducted in a field experiment established in 2006 under Mediterranean climate. Winter treatments were fallow and two CCs, barley (Hordeum vulgare L.) and vetch (Vicia sativa L.). We chose four sampling dates during maize development to evaluate the effect of CCs on AMF over time. Compared with fallow treatment, barley CC increased mycorrhizal colonization by 7%, the hyphae length by 39–124%, and AMF spores by 48–87%. However, contrary to expectations, vetch CC did not have any effect on AMF. Overall, earlier sampling dates better displayed treatment differences. Mycorrhizal colonization percentage demonstrated time‐sensitive values, whereas other AMF parameters (hyphae length, AMF spores) better maintained treatment differences over time. Mycorrhizal stimulation after barley increased maize shoot P concentration but shoot N was not increased despite the N deficit. Soil water stable aggregates were enhanced by barley CC (25–51% higher than fallow), notably related to the length of hyphae, AMF spores and glomalin content. Promotion of soil aggregation, nutritional state and plant height by CCs did not translate into maize yield increments. The main benefits of introducing CCs were related to the enhancement of soil quality and nutrient supply rather than to an increased yield of the following maize crop.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Legacy of eight‐year cover cropping on mycorrhizae, soil, and plants

García-González

Quemada

Gabriel

et al. 2018

J. Plant Nutr. Soil Sci.

View full text Add to dashboard Cite

show abstract

“…Los cultivos cubierta aportan numerosos beneficios por lo que han sido utilizados con frecuencia como marco de evaluación para la implementación de servicios ecosistémicos (Schipanski y col. 2014). Su uso incrementa la calidad del suelo al mejorar algunas de sus propiedades físicas, químicas y biológicas (Lal, 2015;García-González, 2017). Por un lado, gracias a la cobertura se reduce la erosión al evitar el impacto directo del viento y de las gotas de lluvia que rompen los agregados y aumentan la pérdida de suelo, agravada en zonas con pendiente (Bowman y col. 1999).…”

Section: Beneficios De Los Cultivos Cubiertaunclassified

Estrategias de manejo de cultivos cubierta para optimizar el uso de agua y nitrógeno, así como el control de malas hierbas

Ayuso¹

View full text Add to dashboard Cite

The termination date is recognized as a key management factor to enhance cover crops for multiple benefits and to avoid competition with the following cash crop. However, the optimum date depends on annual meteorological conditions, and climate variability induces uncertainty in a decision that needs to be taken every year. One of the most important cover crop benefits is reducing nitrate leaching, a major concern for irrigated agricultural systems and highly affected by the termination date. This study aimed to determine the effects of cover crops and their termination date on the water and N balances of an irrigated Mediterranean agroecosystem under present and future climate conditions. For that purpose, two field experiments were used for inverse calibration and validation of the WAVE model (Water and Agrochemicals in the soil and Vadose Environment), based on continuous soil water content data, soil nitrogen content and crop measurements. The calibrated and validated model was subsequently used in advanced scenario analysis under present and climate change conditions. Under present conditions, a late termination date increased cover crop biomass and subsequently soil water and N depletion. Hence, preemptive competition risk with the main crop was enhanced, but a reduction of nitrate leaching also occurred. The hypothetical planting date of the following cash crop was also an important tool to reduce preemptive competition. Under climate change conditions, the simulations showed that the termination date will be even more important to reduce preemptive competition and nitrate leaching.

show abstract

Biological and other soil parameters response to winter cover crops in a mediterranean irrigated system

Cited by 2 publications

References 177 publications

Legacy of eight‐year cover cropping on mycorrhizae, soil, and plants

Legacy of eight‐year cover cropping on mycorrhizae, soil, and plants

Estrategias de manejo de cultivos cubierta para optimizar el uso de agua y nitrógeno, así como el control de malas hierbas

Contact Info

Product

Resources

About