Adubação com fósforo em cana-soca e sua interação com magnésio

Zambrosi, Fernando César Bachiega

doi:10.1590/s0006-87052012005000029

Cited by 10 publications

(9 citation statements)

References 19 publications

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“…IACSP94–2094 and IACSP95–5000 exhibited higher P efficiency (better performance under low P supply) than IAC91–1099 and IACSP94–2101. Thus, taken together, these results reveal interdependence between P efficiency of sugarcane varieties and the regrowth vigour under low P availability, which corresponds to a finding of practical relevance, as ratoon productivity is commonly impaired by P deficiency in tropical soils (Landell et al , 2003; Zambrosi, 2012). Taking into account that the difference in shoot P uptake between IACSP94–2094 and IACSP95–5000 vs .…”

Section: Discussionsupporting

confidence: 62%

“…IACSP94-2094 and IACSP95-5000 exhibited higher P efficiency (better performance under low P supply) than IAC91-1099 and IACSP94-2101. Thus, taken together, these results reveal interdependence between P efficiency of sugarcane varieties and the regrowth vigour under low P availability, which corresponds to a finding of practical relevance, as ratoon productivity is commonly impaired by P deficiency in tropical soils (Landell et al, 2003;Zambrosi, 2012). Taking into account that the difference in shoot P uptake between IACSP94-2094 and IACSP95-5000 vs. IAC91-1099 and IACSP94-2101 was of a much higher magnitude than that observed for shoot P utilization efficiency (Figures 3a and 4), we might argue that P acquisition efficiency was the component of P efficiency that drove the improved shoot biomass of IACSP94-2094 and IACSP95-5000 in a P deficient soil during the regrowth period.…”

Section: Discussionsupporting

confidence: 58%

“…In order to attain this, special attention should be given to the management of P fertilization, as the reduction of soil P availability over consecutive growth cycles is a critical factor behind the decline in stalk yield of those ratoons receiving a single dose of P at planting (Gopalasundaram et al , 2011). Indeed, the occurrence of insufficient P supply to sugarcane regrowth is supported by evidence of gains in stalk yields and improvements in the P nutritional status of the plants with the reapplication of P fertilizers (Zambrosi, 2012). Despite such positive responses and the recommendation for P reapplication in low P soils (Raij et al , 1997), the restricted P mobility in the soil solution and the strong interaction with the soil matrix (Fontes and Weed, 1996) limit the contact between plant roots and P applied at the soil surface, which, in turn, contributes to the impaired P fertilizer use efficiency of sugarcane ratoons (Singh et al , 2013).…”

Section: Introductionmentioning

confidence: 99%

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Phosphorus Deficiency Impairs Shoot Regrowth of Sugarcane Varieties

et al. 2016

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SUMMARYThe shoot regrowth vigour of sugarcane varieties having contrasting phosphorus (P) efficiency was evaluated under varying soil P availability. The P-inefficient (IAC91-1099 and IACSP94-2101) and -efficient (IACSP94-2094 and IACSP95-5000) sugarcane varieties were grown under low (25 mg P kg −1 soil) or high (400 mg P kg −1 soil) P supply at planting. After 90 days (first cycle of growth), the shoots were harvested and regrowth was studied 70-75 days later by evaluating photosynthesis, leaf area formation, biomass production and P uptake. The shoot dry matter (DM) of sugarcane regrowth subjected to a low P supply was genotype-dependent, with the P-efficient varieties exhibiting greater values than the inefficient ones. This result was explained by the greater efficiency of IACSP94-2094 and IACSP95-5000 in acquiring P rather than P utilization efficiency for shoot biomass production. The root P stored during the first cycle of growth would represent only a minor fraction (< 20%) of the total P content in the shoots at the end of the regrowth period. Thus, we argue that the improved shoot P uptake of the P-efficient varieties was related to their ability to sustain P acquisition after harvesting rather than to the remobilization of root P reserves. Moreover, our data revealed that net CO 2 assimilation per leaf area was not associated with differential performance among varieties under P deficiency, suggesting a more critical role of total leaf area in photosynthate supply for sugarcane regrowth. In conclusion, sugarcane regrowth is improved in P-efficient varieties under P deficiency conditions, a finding of practical relevance as such ability might benefit the productivity and the longevity of sugarcane ratoons in low P tropical soils.

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Section: Discussionsupporting

confidence: 62%

Section: Discussionsupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

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Phosphorus Deficiency Impairs Shoot Regrowth of Sugarcane Varieties

et al. 2016

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“…In many areas of production, overuse of fertilizer P to correct perceived poor soil P availability continues regardless of soil P fertility level. In other areas, P fertilizer is only applied when cane yields start to decline (Landell et al, ; Zambrosi, ). Considerable yield gaps, therefore, exist across Brazil: for example, in Northeast Brazil, yields remain much lower (c. 60 Mg/ha) than the national average due to the lack of regular rainfall, lower levels of mechanization, poor soils, and poorer management (CONAB, ).…”

Section: R Options For the Sustainable Management Of P In Sugarcanementioning

confidence: 99%

Improving phosphorus sustainability of sugarcane production in Brazil

et al. 2019

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Phosphorus (P) use in global food and bioenergy production needs to become more efficient and sustainable to reduce environmental impacts and conserve a finite and critical resource (Carpenter & Bennett, Environmental Research Letters, 2011, 6, 014009; Springmann et al., Nature, 2018, 562, 519). Sugarcane is one crop with a large P footprint because production is centered on P‐fixing soils with low P availability (Roy et al., Nature Plants, 2016, 2, 16043; Withers et al., Scientific Reports, 2018, 8, 2537). As global demand for processed sugar and bioethanol continues to increase, we advocate that improving P efficiency could become a key sustainability goal for the sugarcane industry. Here, we applied the 5R global P stewardship framework (Withers et al., Ambio, 2015, 44, 193) to identify more sustainable options to manage P in Brazilian sugarcane production. We show that current inputs of P fertilizer to the current crop area could be reduced by over 305 Gg, or 63%, over the next three decades by reducing unnecessary P fertilizer use, better utilization of recyclable bioresources and redesigning recommendation systems. Adoption of these 5R options would save the sugarcane industry in Brazil 528 US$ million and help safeguard global food and energy security.

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“…Interação não significativa (p < 0,05): média das doses de P para o efeito calagem e média dos tratamentos com e sem calagem para o efeito doses de P. ns e * não significativo e significativo para o teste F (efeito calagem) e para a análise de regressão (efeito doses de P), a 5% de probabilidade de erro (p < 0,05). DOI: doi.org/10.18671/scifor.v47n123.05 (NAKAGAWA;ROSOLEM, 2005) e não alteração (BOYHAN et al, 2007), não sendo possível estabelecer um padrão definido sobre o efeito da adubação fosfatada no estado nutricional de K nas plantas (ZAMBROSI, 2011).…”

Section: Parâmetros Avaliadosunclassified

Efeito da calagem e da adubação fosfatada no crescimento inicial e na nutrição das plantas de Khaya ivorensis

Ros¹,

Sestari²,

Jaeger³

et al. 2019

Sci. For.

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O mogno africano (Khaya ivorensis A. Chev.) é mais uma espécie florestal que vem se destacando em cultivos comerciais no Brasil. No entanto, são escassas as informações sobre a necessidade de correção da acidez do solo e da nutrição das plantas. O objetivo deste estudo foi avaliar a efeito da calagem e da adubação fosfatada nos atributos químicos do solo, no crescimento inicial e na nutrição das plantas. O delineamento experimental foi inteiramente casualizado, com seis repetições, no arranjo fatorial 2 x 5. Os tratamentos foram dois níveis de calagem (sem e com) e cinco doses de fósforo (0, 10, 20, 30 e 40 mg dm-3 de P). As mudas, com 16,5 cm de altura, foram plantadas em vasos de 6,0 L, preenchidos com solo seco ao ar e peneirado em malha de 4,0 mm. Em intervalos de 60 dias, foi avaliada a altura e o diâmetro do colo das plantas do mogno africano. Aos 240 dias do plantio, foi quantificado os atributos químicos do solo, a massa seca e as concentrações de nutrientes das folhas, caule e raízes. A calagem em solo com saturação de bases de 38,5% não aumentou o crescimento das plantas, mas contribuiu para a redução da acidez, aumento da concentração de Ca e Mg no solo e nas folhas. A adubação fosfatada aumentou a disponibilidade de P no solo e contribuiu para o maior crescimento das plantas de mogno africano.

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Adubação com fósforo em cana-soca e sua interação com magnésio

Cited by 10 publications

References 19 publications

Phosphorus Deficiency Impairs Shoot Regrowth of Sugarcane Varieties

Phosphorus Deficiency Impairs Shoot Regrowth of Sugarcane Varieties

Improving phosphorus sustainability of sugarcane production in Brazil

Efeito da calagem e da adubação fosfatada no crescimento inicial e na nutrição das plantas de Khaya ivorensis

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