Biomass accumulation, extraction and nutrient use efficiency by cover crops

Santos, Valdevan Rosendo dos; Costa, Leonardo Correia; Rocha, Antônio Márcio Souza; Santos, Cícero Gomes dos; Santos, Márcio Aurélio Líns dos; Rabêlo, Flávio Henrique Silveira; Prado, Renato de Mello

doi:10.33448/rsd-v9i10.9433

Cited by 4 publications

(6 citation statements)

References 35 publications

(64 reference statements)

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“…This justifies our results, as the CCs were grown for only 60 days, and only sunn hemp, spectabilis, and millet flowered. Santos et al [36], under similar conditions to our study, reported that sunn hemp had the highest growth rate and the shortest time to flowering (60 days). The authors evaluated species similar to our study; spectabilis, pigeon pea, lab lab, and jack bean took 78, 89, 89, and 83 days to reach flowering, respectively.…”

Section: Biomass and Nutrient Uptake By Cover Cropssupporting

confidence: 87%

“…Previous studies in semiarid regions [36,37] have reported that sunn hemp reached flowering within 60-65 days after sowing. Scavo et al [3] confirmed this as the ideal termination period for CCs, since the plants achieve the highest dry matter and leaf nutrient accumulation at this time.…”

Section: Biomass and Nutrient Uptake By Cover Cropsmentioning

confidence: 91%

“…However, sunn hemp showed a higher K uptake than the other species in 2021. This was attributed to sunn hemp's adaptability to the region's edaphoclimatic conditions [36], rapid growth, and no N limitations due to biological fixation [40]. These characteristics allowed the species to reach the reproductive stage before 60 days, a phase when higher K demand occurs for flowering and grain filling [41].…”

Section: Biomass and Nutrient Uptake By Cover Cropsmentioning

confidence: 99%

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Short-Term Agronomic and Economic Responses to the Adoption of Cover Crops for Corn Rotation in the Brazilian Semiarid Region

Luz,

Silva,

Barbosa

et al. 2023

Sustainability

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Cover crops (CCs) have demonstrated their significance in enhancing the agronomic and economic performance of corn in succession. In this paper, we assess the agronomic responses and short-term economic returns of adopting cover crops (CCs) for corn cultivation in the sandy soils of the semiarid region of northeast Brazil, with the aim of addressing the additional challenges of CCs adoption in semiarid regions. The field study was conducted in Arapiraca, Alagoas, under no-tillage conditions for two cropping seasons. A randomized complete block design was employed, comprising six CCs (sunn hemp, spectabilis, jack bean, pigeon pea, lab lab, and millet) treatments and one fallow, with 18 replications. The CCs were cultivated for 60 days before corn planting. Drip irrigation was applied during the grain-filling stage of corn growth. Over the two cropping seasons, the biomass and nutrient cycling of the CCs, corn yield, and economic returns were determined, as well as the total organic carbon (TOC) and Mehlich-1 extractable P levels in the soil after corn harvest. The grain yields with sunn hemp, spectabilis, and jack bean were superior (~10%) to that of the fallow (7.7 vs. 7.1 Mg ha−1), irrespective of the cropping season. Sunn hemp exhibited a higher biomass accumulation and ensured greater nutrient cycling, except for K, while lab lab and millet displayed a similar potential, although substantial variations were observed between seasons. Under sunn hemp and jack bean, the TOC increased by ~9%, particularly in the second season. Regarding the available P, spectabilis and jack bean exhibited the highest levels, with an increase of ~74% compared to the fallow (~31.1 vs. 17.9 mg dm−3). Spectabilis and lab lab demonstrated more promising results, both agronomically and economically. However, millet and sunn hemp have the potential to reduce costs over multiple cropping seasons. Therefore, the adoption of cover crops is a sustainable and economically viable agricultural practice. However, it is essential to acknowledge that our results do not represent rainfed conditions and require further investigation.

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Section: Biomass and Nutrient Uptake By Cover Cropssupporting

confidence: 87%

Section: Biomass and Nutrient Uptake By Cover Cropsmentioning

confidence: 91%

Section: Biomass and Nutrient Uptake By Cover Cropsmentioning

confidence: 99%

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Short-Term Agronomic and Economic Responses to the Adoption of Cover Crops for Corn Rotation in the Brazilian Semiarid Region

Luz,

Silva,

Barbosa

et al. 2023

Sustainability

Self Cite

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“…A matéria seca total estimada na DMET foi de 2,33 g. O uso de 30% de esterco na composição do substrato produziu um acréscimo de 22% na MST em comparação à testemunha. A MST concentrada na planta é reflexo direto da produção fotossintética líquida, somada à quantidade de nutrientes minerais absorvidos (SANTOS et al, 2020).…”

Section: Resultsunclassified

USO DE ESTERCO BOVINO PROPORCIONA MELHORES MUDAS DE JATOBÁ (Hymenaea courbaril L.)

Silva¹,

Rosario²,

Matos³

et al. 2023

AGRARIAN

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RESUMOJatobá (Hymenaea courbaril L.) é uma espécie pertencente à família Fabaceae, muito utilizada na construção civil e na moveleira. Apesar disso, é uma espécie com escassez de estudo na área de produção de mudas, principalmente visando atender às demandas comerciais ou ambientais. Assim, o objetivo deste estudo foi avaliar o efeito de diferentes doses de esterco bovino no crescimento inicial de mudas de H. courbaril. No experimento foi usado o delineamento inteiramente casualizado, com quatro doses de esterco bovino (0, 20%, 30% e 40% de esterco), com 20 repetições por tratamento. Aos 50 dias após o transplantio, avaliou-se os parâmetros: i) altura da muda, ii) diâmetro do caule, iii) razão entre altura da muda e diâmetro do caule, iv) número de folhas, v) massa seca da parte aérea, vi) massa seca da raiz, vii) massa seca total, viii) comprimento da raiz principal e (ix) Índice de Qualidade de Dickson. A adubação orgânica afetou os parâmetros morfológicos avaliados no trabalho. A dose de 30% de esterco conferiu maiores valores para os parâmetros, com exceção do comprimento da raiz principal. As variáveis IQD, H e DC, apresentaram as maiores correlações no estudo, indicando a sua importância como parâmetro de qualidade das mudas. O uso de esterco é recomendado na faixa de 20% a 30% para o melhor crescimento inicial de H. courbaril. PALAVRAS-CHAVE: Adubação, Fabaceae; Produção vegetal; Substrato USE OF BOVINE MANURE PROVIDES BETTER JATOBÁ SEEDLINGS(Hymenaea courbaril L.

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“…However, if irrigation is scheduled to meet evaporative demands, such negative effects can be limited, increasing NUE and PUE (Meisinger & Delgado, 2002). In addition to water availability, available energy for crop growth also play a role because conditions promoting nutrient accumulation in biomass could increase the nutrient use efficiencies (dos Santos et al., 2020). However, warm conditions could decrease yields and promote nutrient mineralization at times when plants are not using the released nutrients, thus depressing efficiencies.…”

Section: Introductionmentioning

confidence: 99%

Water Availability and Land Management Control Catchment‐Scale Agricultural Nitrogen and Phosphorous Use Efficiencies

Scaini

Vico

Thorslund

et al. 2023

Global Biogeochemical Cycles

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In arable systems, large amounts of nutrients, particularly of nitrogen (N) and phosphorus (P), are not efficiently converted into harvestable products and are lost from agricultural systems, with negative consequences for agricultural productivity and the environment. These nutrient losses are mediated by hydroclimatic processes causing nutrient leaching and volatilization. We quantify over the period 1987–2012 how water availability through the evaporative ratio (actual evapotranspiration divided by precipitation) and irrigation, agricultural practices, and edaphic conditions jointly affect nutrient use efficiencies in 110 agricultural catchments in the United States. We consider N and P use efficiencies (nitrogen use efficiency [NUE] and phosphorous use efficiency [PUE]) defined as ratios of catchment‐scale N and P in harvested products over their respective inputs, as well as the NUE/PUE ratio, as an indication of catchment‐scale N and P imbalance. Both efficiencies increase through time because of changes in climate and agronomic practices. Setting all else at the median value of the data set, NUE and PUE increased with evaporative ratio by 0.5% and 0.2% when increasing the evaporative ratio by 20% and by 4.9% and 18.8% in the presence of irrigation. NUE was also higher in catchments where maize and soybean were dominant (increasing by 2.3% for a 20% increase in maize and soybean fractional area). Soil properties, represented by mineral soil texture and organic matter content, had only small effects on the efficiencies. Our results show that both climatic conditions and crop choice are important drivers of nutrient use efficiencies in agricultural catchments.

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Biomass accumulation, extraction and nutrient use efficiency by cover crops

Cited by 4 publications

References 35 publications

Short-Term Agronomic and Economic Responses to the Adoption of Cover Crops for Corn Rotation in the Brazilian Semiarid Region

Short-Term Agronomic and Economic Responses to the Adoption of Cover Crops for Corn Rotation in the Brazilian Semiarid Region

USO DE ESTERCO BOVINO PROPORCIONA MELHORES MUDAS DE JATOBÁ (Hymenaea courbaril L.)

Water Availability and Land Management Control Catchment‐Scale Agricultural Nitrogen and Phosphorous Use Efficiencies

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