Nitrogen in sugarcane derived from fertilizer under Brazilian field conditions

Franco, Henrique Coutinho Junqueira; Otto, Rafael; Faroni, Carlos Eduardo; Vitti, André César; Oliveira, Emídio Cantídio Almeida de; Trivelin, Paulo César Ocheuze

doi:10.1016/j.fcr.2010.11.011

Cited by 185 publications

(193 citation statements)

References 28 publications

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“…The fact that all plots were fertilized in the last ratoon did not interfere in the accumulated results as shown by Fortes (2010), who evaluated the cumulative yields on a yearly basis and reported the same trend of N rates in plant cane and ratoons. Franco et al (2011) observed that, in sugarcane under trash blankets, the N fertilizer is more important in the early development of sugarcane and that, after maturation and leaf senescence, part of the N accumulated by sugarcane is lost to the environment. Moreover, in reduced tillage, N and other nutrients available on crop residues are conserved on soil layers, since this system delivers a slow release source of N to sugarcane .…”

Section: Resultsmentioning

confidence: 99%

Stalk and sucrose yield in response to nitrogen fertilization of sugarcane under reduced tillage

Fortes

Vitti

Otto³

et al. 2013

Pesq. agropec. bras.

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-The objective of this work was to evaluate the agroindustrial production of sugarcane (millable stalks and sucrose yield) after successive nitrogen fertilizations of plant cane and ratoons in a reduced tillage system. The experiment was carried out at Jaboticabal, SP, Brazil, on a Rhodic Eutrustox soil, during four consecutive crop cycles (March 2005 to July 2009). Plant cane treatments consisted of N-urea levels (control, 40, 80, and 120 kg ha -1 N + 120 kg ha -1 P 2 O 5 and K 2 O in furrow application). In the first and second ratoons, the plant cane plots were subdivided in N-ammonium nitrate treatments (control, 50, 100, and 150 kg ha -1 N + 150 kg ha -1 K 2 O as top dressing over rows). In the third ratoon, N fertilization was leveled to 100 kg ha -1 in all plots, including controls, to detect residual effects of previous fertilizations on the last crop's cycle. Sugarcane ratoon was mechanically harvested. A weighing truck was used to evaluate stalk yield (TCH), and samples were collected in the field for analysis of sugar content (TSH). Increasing N doses and meteorological conditions promote significant responses in TCH and TSH in cane plant and ratoons, in the average and accumulated yield of the consecutive crop cycles.Index terms: Saccharum, agroindustrial production, biomass, crop residues, subsoiling, unburned cane. Produtividade de colmo e sacarose em resposta à adubação nitrogenada da cana-de-açúcar, sob preparo reduzidoResumo -O objetivo deste trabalho foi avaliar a produtividade agroindustrial de cana-de-açúcar (produtividades de colmos e sacarose) após sucessivas adubações nitrogenadas de cana-planta e soqueiras, em sistema de preparo reduzido. O experimento foi conduzido em Jaboticabal, SP, em um Latossolo Vermelho eutrófico durante quatro ciclos agrícolas consecutivos (março de 2005 a julho de 2009). Os tratamentos de cana-planta consistiram de doses de N-ureia (controle, 40, 80 e 120 kg ha -1 de N + 120 kg ha -1 de P 2 O 5 e K 2 O no sulco de plantio). Na primeira e na segunda soqueiras, as parcelas de cana-planta foram subdivididas em tratamentos de N-nitrato de amônio (controle, 50, 100 e 150 kg ha -1 de N + 150 kg ha -1 de K 2 O, sobre as fileiras de cana). Na terceira soqueira, a adubação com N foi de 100 kg ha -1 em todas as parcelas, inclusive nos controles, para detectar efeitos residuais das fertilizações anteriores na produtividade do último ciclo. Os colmos de cana foram colhidos mecanicamente. Utilizou-se caminhão instrumentado com balança para avaliação da produtividade de colmos (TCH), e amostras retiradas no campo para análise da quantidade de açúcar dos colmos (TSH). As doses crescentes de N e as condições meteorológicas proporcionam respostas significativas na TCH e na TSH da cana-planta e das soqueiras, na média e na produção acumulada dos ciclos agrícolas consecutivos.Termos para indexação: Saccharum, produtividade agroindustrial, biomassa, resíduos culturais, subsolagem, cana crua.

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Section: Resultsmentioning

confidence: 99%

Stalk and sucrose yield in response to nitrogen fertilization of sugarcane under reduced tillage

Fortes

Vitti

Otto³

et al. 2013

Pesq. agropec. bras.

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“…Leaching losses of fertilizer N in plant cane grown in Brazil were assumed to be insignificant as observed by Ghiberto et al (2009) using 15 N-enriched fertilizer in a similar study but carried out in a much sandier soil. The N fertilizer must be readily available to plants as it is absorbed in higher quantities during the early growth stages and decreases over the cycle, and in the same way, that this nutrient is also lost by the crop canopy during senescence (Franco et al, 2011;Vitti et al, 2010).…”

Section: Resultsmentioning

confidence: 99%

“…Basanta et al (2003) evaluated the recovery of N-fertilizer by sugarcane in Brazil during three crops and found that 29 % remained in the soil, 42 % was used by plant and 29 % was lost as NOC, a result very similar to ours. According to Dourado Neto et al, (2010) and Franco et al (2011) N from fertilizers has low capacity to replenish N stocks in SOM although fertilizers represent an immediate source of N for crops.…”

Section: N From Green Harvest Residues Recovery By Sugarcane In Threementioning

confidence: 99%

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Contribution of nitrogen from sugarcane harvest residues and urea for crop nutrition

Fortes¹,

Vitti

Otto

et al. 2013

Sci. agric. (Piracicaba, Braz.)

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Sugarcane (Saccharum spp.) harvested without burning provides a substantial amount of remains (trash) on soil profiles which can be decomposed and release nutrients contributing to reduce fertilizer needs. The contribution of nitrogen (N) from sugarcane plant residues and fertilizer in sugarcane nutrition was assessed. Plant cane treatments were micro plots of 15 Nlabeled urea, sugarcane trash and root system; the last two to simulate the previous crop residues incorporated into the soil after crop renewal.

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“…One of the strategies with particular relevance for temperate regions emphasizes the N supply from the soil -specifically, N mineralization from soil organic matter (SOM) (Khan et al, 2001;Roberts et al, 2011). The finding that soils, rather than fertilizers, are the main source of N to plants (Dourado-Neto et al, 2010;Franco et al, 2011) underscores the practicality of this approach.…”

Section: Introductionmentioning

confidence: 99%

Incubation methods for assessing mineralizable nitrogen in soils under sugarcane

Mariano

Leite

Megda

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYConsidering nitrogen mineralization (N) of soil organic matter is a key aspect for the efficient management of N fertilizers in agricultural systems. Long-term aerobic incubation is the standard technique for calibrating the chemical extraction methods used to estimate the potentially mineralizable N in soil. However, the technique is laborious, expensive and time-consuming. In this context, the aims of this study were to determine the amount of soil mineralizable N in the 0-60 cm layer and to evaluate the use of short-term anaerobic incubation instead of longterm aerobic incubation for the estimation of net N mineralization rates in soils under sugarcane. Five soils from areas without previous N fertilization were used in the layers 0-20, 20-40 and 40-60 cm. Soil samples were aerobically incubated at 35 °C for 32 weeks or anaerobically incubated (waterlogged) at 40 °C for seven days to determine the net soil N mineralization. The sand, silt and clay contents were highly correlated with the indexes used for predicting mineralizable N. The 0-40 cm layer was the best sampling depth for the estimation of soil mineralizable N, while in the 40-60 cm layer net N mineralization was low in both incubation procedures. Anaerobic incubation provided reliable estimates of mineralizable N in the soil that correlated well with the indexes obtained using aerobic incubation. The inclusion of the pre-existing NH 4 + -N content improved the reliability of the estimate of mineralizable N obtained using anaerobic incubation.Index terms: Saccharum spp., net N mineralization, aerobic incubation, anaerobic incubation.(

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Nitrogen in sugarcane derived from fertilizer under Brazilian field conditions

Cited by 185 publications

References 28 publications

Stalk and sucrose yield in response to nitrogen fertilization of sugarcane under reduced tillage

Stalk and sucrose yield in response to nitrogen fertilization of sugarcane under reduced tillage

Contribution of nitrogen from sugarcane harvest residues and urea for crop nutrition

Incubation methods for assessing mineralizable nitrogen in soils under sugarcane

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