Carbon and nitrogen cycling in an integrated soybean-beef cattle production system under different grazing intensities

Assmann, Joice Mari; Anghinoni, Ibanor; Martins, Amanda Posselt; Costa, Sérgio Ely Valadão Gigante de Andrade; Kunrath, Taise Robinson; Bayer, Cimélio; Carvalho, Paulo César de Faccio; Franzluebbers, Alan J.

doi:10.1590/s0100-204x2015001000013

Cited by 31 publications

(36 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(1) By difference from total minus residues of fresh grass, dung, and removal in cattle beef. Although grazing treatments did not affect Ca and Mg concentrations of plant and animal residue (Table 1) and total amount (Table 2) were affected, because the amount of decomposable residues was a function of grazing treatments (Assmann et al, 2015). Thus, the Ca and Mg amounts released from pasture residue and dung were different among the grazing intensities.…”

Section: Resultsmentioning

confidence: 95%

“…Best-fit regressions for these residues were the single-exponential model for stems and the double-exponential model for leaves (Table 3). Soybean leaves had lower lignin content, a lower C:N ratio, and higher N content than stems (Assmann et al, 2015), promoting high microbial activity and degradability.…”

Section: Resultsmentioning

confidence: 97%

“…Total plant (pasture and soybean) and animal (dung) residue DM production, as well as lignin content, were presented and discussed by Assmann et al (2015).…”

Section: Resultsmentioning

confidence: 99%

“…Total Ca and Mg amounts to be cycled were related to the intensities of grazing treatments (Table 2) and were determined by total pasture production in the grazing period, since there was no effect on soybean plant residues (Assmann et al, 2015), and no had effect on Ca and Mg concentrations in all residues ( Table 1). The discussion below regarding cycling of these nutrients will thus focus on the impacts of grazing intensities on DM production of plant and animal residues.…”

Section: Resultsmentioning

confidence: 99%

“…Lower pasture and dung residue lignin contents (on average, 9 and 19 %, respectively) (Assmann et al, 2015) help explain the difference between Ca and Mg release kinetics, with faster release and lower half-life time under moderate grazing intensities. Lower pasture lignin content under moderate grazing intensity provides higher quality forage.…”

Section: Resultsmentioning

confidence: 99%

See 4 more Smart Citations

Calcium and Magnesium Released from Residues in an Integrated Crop-Livestock System under Different Grazing Intensities

Assmann

Martins

Anghinoni

et al. 2017

Rev. Bras. Ciênc. Solo

Self Cite

View full text Add to dashboard Cite

Under integrated crop-livestock production systems (ICLS), plant and animal residues are important nutrient stocks for plant growth. Grazing management, by affecting the numbers of both plants and animals and the quality of residues, will influence nutrient release rates. The objective of this study was to evaluate the impact of grazing intensity on Ca and Mg release from pasture, dung, and soybean residues in a long-term no-till integrated soybean-cattle system. The experiment was established in May 2001 in a Latossolo Vermelho Distroférrico (Rhodic Hapludox). Treatments were a gradient of grazing intensity, determined by managing a black oat + Italian ryegrass pasture at 10, 20, 30, and 40 cm grazing height and no-grazing (NG), followed by soybean cropping. Ca and Mg release rates were determined in two entire cycles (2009/11). Moderate grazing (20 and 30 cm sward height) led to greater Ca and Mg release rates from pasture and dung residues, with low average half-life values (13 and 3 days for Ca and 16 and 6 days for Mg for pasture and dung, respectively). Grazing compared with NG resulted in greater Ca and Mg release from pasture and dung residues. Grazing intensity did not affect Ca and Mg release rates or amounts from soybean residues, but Ca and Mg release rates were greater from soybean leaves than from stems. Although moderate grazing intensities produce higher quality residues and higher calcium and magnesium release rates, a higher total nutrient amount is released by light grazing intensity and no-grazing, determined by higher residue production. Grazing intensity is, then, important for nutrient dynamics in the soil-plant-animal continuum.

show abstract

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 97%

“…Total plant (pasture and soybean) and animal (dung) residue DM production, as well as lignin content, were presented and discussed by Assmann et al (2015).…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Calcium and Magnesium Released from Residues in an Integrated Crop-Livestock System under Different Grazing Intensities

Assmann

Martins

Anghinoni

et al. 2017

Rev. Bras. Ciênc. Solo

Self Cite

View full text Add to dashboard Cite

show abstract

Effects of trees and nitrogen supply on macronutrient cycling in integrated crop–livestock systems

et al. 2020

View full text Add to dashboard Cite

Residue decomposition from pastures and crops plays an important role in nutrient cycling in integrated crop-livestock systems (ICLS). The objective of this research was to quantify dry matter decomposition and nutrient release-nitrogen, phosphorus, and potassium (N, P, and K, respectively), the most commonly required nutrients in tropical and subtropical agriculture-from pasture and soybean (Glycine max) residues of stocking and crop seasons in two ICLS (with and without trees, CLT and CL, respectively) and two N fertilization levels (90 vs. 180 kg N ha −1 , N90 and N180, respectively, applied during the pasture phase). Litter bag incubations were set out in the December 2014 (soybean phase) and May 2015 (pasture phase), and retrieved after 7, 15, 30, 60, 90, and 120 d in each season. The total N, P, and K released from the pasture or soybean residues were related to the initial quantity of plant residues, which was reduced in the CLT systems, mostly for pasture residue (−60%), probably due to light reduction (−55%), rather than changes in litter quality and dynamics. Significant amounts of N (∼57 kg ha −1 ), P (∼11 kg ha −1 ), and K (∼58 kg ha −1 ) were cycled, particularly in CL and N180 treatments. The quantities of K released from pasture residues were enough to restore the quantity of K exported by soybean grains. Therefore, results reinforce the need to understand nutrient release patterns from residues to improve fertilization management.Abbreviations: CL, crop-livestock systems; CLT, crop-livestock systems with trees; DBH, diameter at breast height; DM, dry matter; Gha, animal gain per hectare; Ht, total height; ICLS, integrated crop-livestock systems; LW, live weight; N180, 180 kg N ha −1 ; N90, 90 kg N ha −1 .

show abstract

Grazing intensity and nitrogen fertilization effects on biomass and morphology of black oat roots in an integrated crop–livestock system

et al. 2023

View full text Add to dashboard Cite

Grazing stimulates root and forage mass of perennial pastures, but few studies have addressed the effects of grazing on annual pastures which are often grown in short periods within integrated crop–livestock systems (ICLS). In these pastures, N fertilization is a common practice to increase forage mass, but its effects on root morphology are unclear. In a field experiment, we evaluated how grazing intensities (ungrazed, moderate, and heavy grazing) and N fertilization rates (0, 75, and 150 kg N ha−1) affected morphological attributes of oat (Avena strigosa Schreb.) roots and forage accumulation in ICLS in Brazilian subtropics. Forage mass was evaluated in each grazing cycle and roots were sampled to a 30‐cm depth at the end of the grazing season in 2 years. Heavy and moderate grazing reduced (p < 0.05) forage accumulation by 15%–37% compared to ungrazed (4867 kg DM ha−1) in the first year, characterized by extended periods of water deficit, but in the second year forage accumulation from grazed and ungrazed was similar (p > 0.05), averaging 4273 kg ha−1. N fertilization increased forage accumulation in both the years, without differences between 75 and 150 kg N ha−1 in grazed treatments. Grazing and N rates mainly reduced root diameter and increased root N concentration. Increasing N fertilization rates increased root length but it was more expressive in the first year. Nitrogen fertilization with 75 or 150 kg N ha−1 on moderately grazed oat is an alternative to increase forage accumulation as it stimulates fine root development and increase N uptake, mainly when adverse climatic conditions can affect pasture growth.

show abstract

Carbon and nitrogen cycling in an integrated soybean-beef cattle production system under different grazing intensities

Cited by 31 publications

References 27 publications

Calcium and Magnesium Released from Residues in an Integrated Crop-Livestock System under Different Grazing Intensities

Calcium and Magnesium Released from Residues in an Integrated Crop-Livestock System under Different Grazing Intensities

Effects of trees and nitrogen supply on macronutrient cycling in integrated crop–livestock systems

Grazing intensity and nitrogen fertilization effects on biomass and morphology of black oat roots in an integrated crop–livestock system

Contact Info

Product

Resources

About