REMOVAL OF N, P, K AND CA BY AN ONION CROP (Allium cepa L.) IN A SILTY-CLAY SOIL, IN A SEMIARID REGION OF VENEZUELA

Pire, Reinaldo; Ramírez, Hugo; Riera, Josep Boatella; deGomez, T.N.

doi:10.17660/actahortic.2001.555.12

Cited by 18 publications

(8 citation statements)

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“…, varying according to the cultivar, climate, density and productivity levels (Odet et al, 1989;Brown, 2000;Sullivan et al, 2001;Pire et al, 2001). …”

Section: Resultsmentioning

confidence: 99%

“…In onions, the potential for nitrogen (fertilizer) loss by leaching, applied during the vegetative growth phase, is high because the root system of onion grows slowly (Thorup- Kristensen, 2001), not exceeding a 10 cm depth up to 32 days after transplantation (DAT) (Machado et al, 2009) and nitrogen needs during the vegetative growth phase (40 to 55% of the crop-cycle length) are very low: less than 5 % to 8 % of total N uptake (Brown, 2000;Halvorson et al, 2002;Machado et al, 2012;Pire et al, 2001). For intermediate-day onions that are planted at the end of the winter, in the Mediterranean climate, when soil temperature is more favourable for organic matter mineralisation, it is not advisable to apply pre-plant N in most soils (Machado et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Organic matter fractions and N mineralization in vegetable‐cropped sandy soils

Jegajeevagan

Sleutel

Ameloot

et al. 2013

Soil Use and Management

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Soil organic nitrogen mineralization rates and possible predictors thereof were investigated for vegetable‐growing soils in Belgium. Soil organic matter (SOM) was fractionated into sand (> 53 μm) and silt+clay (< 53 μm) fractions. The latter fraction was further separated into 6%NaOCl‐oxidation labile (6%NaOCl‐ox) and resistant N and C and subsequently into 10%HF‐extractable (mineral bound) and resistant (recalcitrant) N and C. The N mineralization turnover rate (% of soil N/year) correlated with several of the investigated N or C fractions and stepwise linear regression confirmed that the 6%NaOCl‐ox N was the best predictor. However, the small R² (0.42) of the regression model suggests that soil parameters other than the soil fractions isolated here would be required to explain the significant residual variation in N mineralization rate. A next step could be to look for alternative SOM fractionations capable of isolating bioavailable N. However, it would appear that the observed relationships between N fractions and N mineralization may not be causal but indirect. The number of vegetable crops per rotation did not influence N mineralization, but it did influence 6%NaOCl‐ox N, probably as an effect of differences in crop residues returned and organic manure supply. However, the nature of this relation between management, SOM quality and N mineralization is not clear. Explanation of correlations between N mineralization and presumed bioavailable N fractions, like the 6%NaOCl‐ox N, requires further mechanistic elucidation of the N mineralization process.

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“…, varying according to the cultivar, climate, density and productivity levels (Odet et al, 1989;Brown, 2000;Sullivan et al, 2001;Pire et al, 2001). …”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Organic matter fractions and N mineralization in vegetable‐cropped sandy soils

Jegajeevagan

Sleutel

Ameloot

et al. 2013

Soil Use and Management

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“…Also, it can increase the cation exchange capacity (CEC) of the soil and improve fertilization efficiency. Organic fertilizer addition can increase the weight of the fruit and also improve soil properties through increasing soil water content, soil organic carbon, cation exchange capacity and pH as well as the increase of P and K in plants and reduce the use of inorganic fertilizers by 50% (Agegnehu et al, 2016;Gobbi et al, 2016;Kaplan et al, 2016;Sumarni et al, 2009;Yuliana et al, 2015;Salo, 2002;Sorensen, 1996;Pire et al, 2001).…”

Section: Discussionmentioning

confidence: 99%

Improvement of soil quality using bokashi composting and NPK fertilizer to increase shallot yield on dry land

Lasmini¹,

Nasir²,

Hayati³

et al. 2018

Aust J Crop Sci

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The use of NPK fertilizer and bokashi composting, which is a fermented organic matter combined with microbial stock, have been reported as potential agricultural practices to enhance the farming land and crop production. The aim of this research is to understand the type of bokashi fertilizer and the correct dosage of NPK inorganic fertilizer in improving entisol soil quality and shallot yield in the dry land. The research used the split-plot design, which was divided into two factors. The first factor of the main plot was the bokashi type consisting of two levels: 3 t ha-1 of bokashi compost of Gliricidia sp. tree leaves (B1); and bokashi cow manure 3 t ha-1 (B2). The second factor as the subplot was the NPK inorganic fertilizer dose which were consisted of four levels: without fertilizers (K0), NPK 100 kg ha-1 (K1), NPK 200 kg ha-1 (K2), and NPK 300 kg ha-1 (K3). By combination of these two factors 8 combined treatments with 3 replications totally 24 units were obtained. The result of the research showed that application of 3 t ha-1 bokashi cow manure (B2) coupled with NPK inorganic fertilizer at 200 kg ha-1 (K2) caused a decrease in evaporation of its land and soil temperature, while increase shallot bulb yield compared with other treatments. The analysis of soil and soil microbes showed an increase in soil fertility by elevated levels of C-organic from 0.66 % to 3.28 %, N-fixing bacteria from 27 x 10 5 CFU ml-1 to 47 x10 6 CFU ml-1 and phosphate solubilizing bacteria from 20 x10 3 CFU ml-1 to 90 x10 3 CFU ml-1. The shallot bulb yield increased from 4.79 t ha-1 to 11.74 t ha-1 .

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“…In soils that are moderately low in P, garlic growth and yield can be enhanced by applied P. Results of long-term fertilizer trials on loamy sand soils in Germany have shown a strong response of onions to P fertilization in the range 0-52 kg P ha -1 (Alt et al, 1999). Depending on yield levels, P uptake rates in onion estimated to be about 15-30 kg ha -1 (Pire et al, 2001;Salo et al, 2002). In western Kenya, as reported by Jamma (1998) soil, water and nutrient losses tremendously reduced by P addition because of the rapid formation of soil cover.…”

Section: The Use Of Mineral Fertilizers In Garlic Productionmentioning

confidence: 99%

“…Onions take up K in quantities nearly equivalent to N (Pire et al, 2001;Singh and Verma, 2001;Salo et al, 2002). Moreover, like N, K is easily leached from soils and fertilization may be needed for high yields (Brewster, 1994;Marschner, 1995).…”

Section: The Use Of Mineral Fertilizers In Garlic Productionmentioning

confidence: 99%

Review of Management Strategies of Constraints in Garlic (Allium sativum L.) Production

Diriba-Shiferaw¹

2016

J Agric Sciences

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The main aim of this review is to provide an overview of the garlic crop productivity and its production management requirements like soil, climate and fertilization in general and specifically in Ethiopia, comparing them with current research trends and to indicate future benefits of soil nutrient management investigations and their importance for agronomic and cultural practices. This paper reviewed that application of balanced nutrients under optimum moisture availability in different soil types is an important crop management strategy, which may help maximizing crop yield and quality. Also, lack of optimum nutrients and moisture in the soil has been the major bottlenecks of garlic production and productivity; since the crop has a very shallow root system that requires frequent irrigation and fertilization with different types of fertilizers under various soil types. Low soil fertility is one of the principal and pervasive constraints to garlic production in Ethiopia; thus, there are differences among soil types in yielding ability under different nutrients and soil characteristics. Most smallholder farmers in Ethiopia appreciate the value of fertilizers, but they are seldom able to apply them at the recommended rates and at the appropriate time according to the soil characteristics. These are because of high cost, lack of credit, delivery delays, and low and variable returns. In addition, the traditional organic inputs, crop residues and animal manures, identified that it cannot meet crop nutrient demand over large areas because of the limited quantities available, the low nutrient content of the materials, and the high labor demands for processing and application. However, there was felt that could exist an opportunity to increase garlic crop yields through identification/selection of soil type and balanced nutrients application or searching for other nutrients sources beyond Urea and Diammonium phosphate especially in Ethiopian condition. Therefore, the integrated use of both the organic and inorganic fertilizers continuum inputs was felt the best option to increase both yield potential and quality of garlic crop and environment-friendly sustainable farming systems and increase of profit margins for growers.

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REMOVAL OF N, P, K AND CA BY AN ONION CROP (Allium cepa L.) IN A SILTY-CLAY SOIL, IN A SEMIARID REGION OF VENEZUELA

Cited by 18 publications

References 0 publications

Organic matter fractions and N mineralization in vegetable‐cropped sandy soils

Organic matter fractions and N mineralization in vegetable‐cropped sandy soils

Improvement of soil quality using bokashi composting and NPK fertilizer to increase shallot yield on dry land

Review of Management Strategies of Constraints in Garlic (Allium sativum L.) Production

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