Nutrients released by Urochloa cover crops prior to soybean

Tanaka, Katiuça Sueko; Crusciol, Carlos Alexandre Costa; Soratto, Rogério Peres; Momesso, Letusa; Costa, Cláudio Hideo Martins da; Franzluebbers, Alan J.; Oliveira, Adílson de; Calonego, Juliano Carlos

doi:10.1007/s10705-019-09980-5

Cited by 35 publications

(28 citation statements)

References 40 publications

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“…In intercrops, a larger volume of soil is explored, both between the rows and at depth, depending on the agronomic characteristics of the crops chosen for cultivation. In NT systems, Urochloa produces large amounts of residues, which contribute to the increase of the SOM and to reduce soil erosion, water and nutrients runoff and water evaporation (Tully and Ryals, 2017;Tanaka et al, 2019). Both crop rotation and intercrop favor the cycling of nutrients, as they increase the efficiency in the use of fertilizers and nutrients (Pedrosa, 2013), in addition to recovering elements virtually lost beyond the reach of the root system of the main crop (Maciel de .…”

Section: Urochloa In Tropical and Subtropical Conservation Agriculturementioning

confidence: 99%

“…Urochloa cultivation in rotation systems or as intercrop generates considerable amounts of residues above and belowground that will be prone to decomposition and mineralization (Momesso et al, 2019;Tanaka et al, 2019). However, the total amount of the nutrients released in the soil do not become fully available for plant absorption.…”

Section: Decomposition Of Urochloa Residues and Nutrient Releasementioning

confidence: 99%

“…These relatively high decomposition rates were attributed to favorable rainfall and temperature conditions during the study, and consequently, a fast nutrient release was observed, as more than 80% of all the macronutrients contained in the residues were released. Tanaka et al (2019) reported that depending on the growing season, the cover crop biomass production, decomposition rates and nutrient release are affected by rainfall distribution. The homogeneous rainfall distribution was responsible for great biomass production, high decomposition rate and nutrient release after 90 days of Urochloa desiccation (Tanaka et al, 2019).…”

Section: Decomposition Of Urochloa Residues and Nutrient Releasementioning

confidence: 99%

“…Tanaka et al (2019) reported that depending on the growing season, the cover crop biomass production, decomposition rates and nutrient release are affected by rainfall distribution. The homogeneous rainfall distribution was responsible for great biomass production, high decomposition rate and nutrient release after 90 days of Urochloa desiccation (Tanaka et al, 2019). After this period more than 90% of the residues were decomposed and nutrients released; on the other hand, although producing fewer residues, only 74% of it was decomposed and 30% of N was remaining when the condition was not favorable.…”

Section: Decomposition Of Urochloa Residues and Nutrient Releasementioning

confidence: 99%

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Urochloa in Tropical Agroecosystems

Baptistella¹,

Andrade

Favarin³

et al. 2020

Front. Sustain. Food Syst.

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Increasing biodiversity is an important issue in more secure and sustainable agriculture. Diversified systems are more resilient to climate change, environmental stresses and enhance soil health, nutrient cycling and nutrient use efficiency. In tropical agroecosystems, cover crops and intercrops are an alternative toward a more diverse and sustainable production. Urochloa spp. (syn. Brachiaria spp.) are perennial grasses, known for their high biomass production. They are commonly used as cover and companion crops in conservation agriculture in the tropics and the residues left in the field after cutting protect the soil and provide nutrient to the next crop cycle or intercropped culture. Urochloa species roots are vigorous, abundant and deep, as opposed to the more shallow and scarce roots of common crops. These traits contribute to carbon sequestration, soil organic matter stabilization and nutrient cycling. Urochloa roots also improve soil physical characteristics and influence soil nutrient dynamics, reducing nutrient losses and enhancing cycling, what is key to achieve greater nutrient use efficiency in agriculture. For instance, Urochloa root exudates can reduce nitrogen losses by denitrification and leaching through a process called biological nitrification inhibition; root exudates can mobilize recalcitrant phosphorus from soils and make it available for plant uptake; the deep roots of these grasses have the potential to recover nutrients that are virtually lost away from the root zone of other crops. This review compiles scientific progress regarding the introduction of Urochloa in agroecosystems, mainly on the aspects related to the contribution to more secure and sustainable agriculture.

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Section: Urochloa In Tropical and Subtropical Conservation Agriculturementioning

confidence: 99%

Section: Decomposition Of Urochloa Residues and Nutrient Releasementioning

confidence: 99%

Section: Decomposition Of Urochloa Residues and Nutrient Releasementioning

confidence: 99%

Section: Decomposition Of Urochloa Residues and Nutrient Releasementioning

confidence: 99%

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Urochloa in Tropical Agroecosystems

Baptistella¹,

Andrade

Favarin³

et al. 2020

Front. Sustain. Food Syst.

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“…cover crops contribute to the recovery and cycling of nutrients, reduce the risk of soil erosion and assist in controlling pests, diseases and nematodes (Leandro & Asmus 2015, Ren et al 2019, Tanaka et al 2019).…”

Section: Abstract Resumomentioning

confidence: 99%

Contribution of corn intercropped with Brachiaria species to nutrient cycling1

Oliveira

Almeida

Pierozan

et al. 2019

Pesqui. Agropecu. Trop.

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The corn biomass and nutrient dynamics may be altered when it is intercropped with Brachiaria (syn. Urochloa spp.). The present study aimed to investigate the dynamics of biomass, nitrogen (N), phosphorus (P) and potassium (K) for farming systems that produce corn intercropped with Brachiaria species. Field experiments were performed during the season and off-season, in a split-plot design. The main plots were composed of Brachiaria species (B. brizantha,B. ruziziensis and B. Convert) intercropped with corn, in addition to corn monocropping. The subplots consisted of three forage sampling periods, ranging from 0 to 60 days after the corn harvest. The intercropping arrangements did not affect the corn grain yield, nutrient accumulation and partitioning, relatively to the corn monocropping. After the grain harvest, B. brizantha achieved the greater biomass accumulation rate in both the season (69 kg ha-1 day-1) and off-season (17 kg ha-1 day-1). The nutrient accumulation ranged widely between the Brachiaria species and planting seasons: 0.2-1.2 kg ha-1 day-1 for N; 0.01-0.07 kg ha-1 day-1 for P; and 0.13-0.8 kg ha-1 day-1 for K. However, the greatest nutrient accumulation was found for B. brizantha, followed by B. ruziziensis and then B. Convert. In the short-term, corn intercropped with Brachiaria in the season showed the largest effect on the nutrient cycling and biomass yield. The intercropping between corn and B. brizantha in the season was the best way to enhance the biomass yield and the N, P and K cycling.

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Cover crop and early nitrogen management for common bean in a tropical no‐till system

et al. 2021

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Common bean (Phaseolus vulgaris L.) has been grown under no‐till (NT), but nitrogen (N) management remains unclear when a previous cover crop is part of the farming system. In this study, we hypothesized that N applied to living cover crops, preceding the main grain crop of the rotation, can increase productivity and N‐use efficiency of the grain crop. Common bean was grown after palisade grass [Urochloa brizantha (Hochst. Ex A. Rich.) R.D. Webster] and ruzigrass [Urochloa ruziziensis (R. Germ. and C.M. Evrard) Crins] cover crops combined with N management [application to living cover crops 35 days before common bean seeding (DBS), 1 DBS, conventional, and control (zero‐N application)] in four experiment‐years. Dry matter (DM) and N content for palisade grass was consistently greater at termination relative to ruzigrass. Nitrogen application 35 DBS increased cover crop DM, N content, and the decomposition rate relative to the other N treatments. Greater common bean yield occurred following palisade grass than ruzigrass, and N application 35 DBS increased common bean yield compared to 1 DBS and conventional in one out of four experiment‐years. Only minor differences in the agronomic efficiency (AE) of applied N to cover crops were detected between 35 DBS and 1 DBS, and only for one experiment‐year, when palisade grass resulted in greater AE than ruzigrass. Applying N early to living crops such as palisade grass is an alternative N management strategy to the traditional approach for N fertilization in common bean.

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Nutrients released by Urochloa cover crops prior to soybean

Cited by 35 publications

References 40 publications

Urochloa in Tropical Agroecosystems

Urochloa in Tropical Agroecosystems

Contribution of corn intercropped with Brachiaria species to nutrient cycling1

Cover crop and early nitrogen management for common bean in a tropical no‐till system

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