Absorption of macronutrients by cassava in different harvest dates and dosages of nitrogen

Santos, Nádia Souza dos; Alves, José Maria Arcanjo; Uchôa, Sandra Cátia Pereira; Oliveira, Natália Trajano de; Albuquerque, José de Anchieta Alves de

doi:10.1590/s1806-66902014000400001

Cited by 10 publications

(13 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Concentrations of nutrients in the cassava leaves varied with the growth stage, but within a narrow range throughout the season, as previously observed by Howeler (2012). The leaf N concentrations we observed were within the sufficiency range of 45 to 60 g/kg suggested for cassava (Santos et al 2014). Contrary to the finding of Howeler (2012), stem N concentration increased at 8 MAP (dry season) (Fig.…”

Section: Nutrient Concentration In Leaves Stems and Storage Rootssupporting

confidence: 57%

Dynamics of N-P-K demand and uptake in cassava

Adiele

Schut²,

Ezui³

et al. 2020

Agron. Sustain. Dev.

View full text Add to dashboard Cite

Fertilizers are required to improve productivity of cassava and meet the increasing demand for cassava as food, feed, or raw material for processing industries. Our objective was to develop nutrition indices for N, P, and K to provide quantitative insight in the dynamics of nutrient demand and uptake of cassava. On-farm experiments were conducted at six locations in Nigeria from 2016 to 2018, across the major cassava growing agro-ecologies of West Africa. Nitrogen, P, and K were applied at different rates. Uptake of nutrients was measured in leaves, stems, and storage roots at 4, 8, and 12 or 14 months after planting (MAP) and used to construct NPK dilution curves and nutrition indices. About 67, 61, and 52% of total N, P, and K were taken up at 4 MAP, with a maximum uptake rate of 0.21, 0.03, and 0.12 g/m2/d for N, P, and K, respectively. Nutrient concentrations in stems and storage roots declined gradually, in contrast to concentrations in the leaves that fluctuated within narrow ranges. Dilution curves and nutrition indices for N, P, and K were established for the first time in cassava. Dilution curves of N, P, and K in the crop for the highest NPK application treatment were described as Nc = 82DM−0.61, Pc = 7.4DM−0.54, and Kc = 43DM−0.54, when total biomass was between 5 and 57 t/ha dry matter (DM). The nutrition indices were linearly related to relative crop biomass. Insight into the nutrient uptake and dilution patterns during the growth cycle can help to understand the temporal nutrient demands of cassava and identify sustainable management practices. Initial ample supply of N and P and moderate K, with extra K top-dress during the second growth phase, will benefit cassava growth and yield. Furthermore, such information provides a basis to develop a dynamic model to simulate nutrient-limited growth of cassava.

show abstract

Section: Nutrient Concentration In Leaves Stems and Storage Rootssupporting

confidence: 57%

Dynamics of N-P-K demand and uptake in cassava

Adiele

Schut²,

Ezui³

et al. 2020

Agron. Sustain. Dev.

View full text Add to dashboard Cite

show abstract

“…Among the soil nutrients, N is cited as the most taken up by cassava (Ayoola e Makinde, 2007;Adjei-Nsiah, 2010;Santos et al, 2014). The availability of N is affected by the low levels of organic matter present in the soil reserved for its cultivation.…”

Section: Introductionmentioning

confidence: 99%

Effect of Harvest Time and Nitrogen Doses on Cassava Root Yield and Quality

Oliveira

Uchôa

Alves

et al. 2017

Rev. Bras. Ciênc. Solo

Self Cite

View full text Add to dashboard Cite

ABSTRACT:Nitrogen is considered the most limiting nutrient for cassava, and N availability can influence the crop cycle, including earlier harvest. The aim of this study was to study the effect of harvest time on the production components of cassava, "Aciolina" cultivar, at different rates of N fertiliser. The experiment was carried out in an area newly incorporated into the productive system in a savannah ecosystem in the northern Amazon. A randomised block experimental design was used in a split plot arrangement with four replications. The N rates (0, 30, 60, 150, and 330 kg ha -1 ) were allocated to the main plots, and the harvest times (90, 120, 150, 180, 240, 300, and 360 days after emergence of the stalks -DAE) were allocated to the subplots. Plant height, shoot fresh matter yield, number of roots per plant, average root diameter, and root fresh matter yield display an increasing linear response up to 360 DAE in cassava cv. "Aciolina". For all harvest times, the N rates promote an increase in root fresh matter yield. At 300 and 360 DAE, the root fresh matter and starch yield and the harvest index show a quadratic response as a function of the N level. The greatest efficiency of N topdressing on the production of root fresh matter occurs at 300 DAE, promoting an earlier harvest. At that time, the dose of maximum technical efficiency, 226 kg ha -1 N, results in a yield of 62 Mg ha -1 of root fresh matter, 13 Mg ha -1 of starch, and a harvest index of 81 %.

show abstract

“…Concentrations of nutrients in the cassava leaves varied with the growth stage, but within a narrow range throughout the season, as previously observed by Howeler (2012). The leaf N concentrations we observed were within the sufficiency range of 45 to 60 g kg -1 suggested for cassava (Santos et al, 2014). Contrary to the finding of Howeler (2012), stem N concentration increased at 8 MAP (dry season) ( Fig.…”

Section: Discussionsupporting

confidence: 56%

Growing out of hunger: towards an improved understanding of the water and nutrient limited yield of cassava

Adiele

View full text Add to dashboard Cite

Cassava is an important staple crop for the rural population but also more and more used as a cash and industrial crop, contributing to economic development of sub-Saharan Africa (SSA). Therefore, sustainable intensification of cassava has become necessary, but the crop's yield potential is unknown. This study aimed to understand the yield potential of cassava and the dynamics of nutrient limitations in relation to water availability, to obtain better insight and a theoretical understanding of how the crop responds to nutrient availability and application of fertilizers in different agro-ecologies. Field experiments were conducted in different agro-ecologies: in Cross River (Tropical Rainforest), Edo (Forest Transition Savanna) and Benue (Guinea Savanna) in 2016 and 2017. Treatments included NPK fertilizers in four application rates, N, P and K omission plots and plots combining the highest rates of N and P (300 kg N ha-1 , 100 kg P ha-1) with respectively 60, 120, 180, 240 and 300 kg K ha-1 , and highest rate of N, P and K combined with secondary and micronutrients. Fresh and dry biomass and nutrient contents of leaves, stems and storage roots were recorded at 4 and 8 months after planting and at final harvest. At set times, light interception and detailed plant characteristics were measured, including canopy dimensions, number of leaves and leaf scars. The measured values were used to calculate other variables, including leaf angle distribution, light extinction coefficient, leaf area index (LAI) and radiation use efficiency (RUE). The LINTUL-Cassava model was recalibrated and tested for accuracy of water limited yield predictions. Further, model components were added that allowed us to compute N, P and K limited growth. Foremost, we evaluated the cassava yield potential and nutrient use efficiency when supplied with various N, P and K rates and at high N and P rates with increasing rates of K. Measured storage root dry matter (DM) yields ranged between 11 and 35 t DM ha-1. The largest yields were obtained at the largest rates of K with a mean agronomic efficiency of 60, 162 and 51 kg DM of storage roots per kg of N, P and K applied. Increasing the supply of K improved yields and therefore also the agronomic efficiency of N and P. Storage root yield responses to applied N, P and K fertilizers (2-18, 3-16 and 3-22 t DM ha-1 , respectively) varied across the agro-ecologies, reflecting variability in potential yields and applied NPK ratios. Addition of secondary and micronutrients did not affect cassava storage root yield. We found that the caloric energy yield of cassava per kg of N applied is 2.7 times larger than the value reported for maize. For the nutrient uptake dynamics in cassava, on average, 67, 61 and 52 % of total N, P and K uptake were already taken up at four months after planting (MAP), respectively. The maximum uptake rates for N, P and K were 0.21, 0.03 and 0.12 g m-2 d-1 respectively at about four MAP. Nutrient dilution curves for N, P and K at different application rates were quantified for the ...

show abstract

Absorption of macronutrients by cassava in different harvest dates and dosages of nitrogen

Cited by 10 publications

References 18 publications

Dynamics of N-P-K demand and uptake in cassava

Dynamics of N-P-K demand and uptake in cassava

Effect of Harvest Time and Nitrogen Doses on Cassava Root Yield and Quality

Growing out of hunger: towards an improved understanding of the water and nutrient limited yield of cassava

Contact Info

Product

Resources

About