PRODUCTION OF LETTUCE UNDER GREEN MANURING WITH Calotropis procera IN TWO CULTIVATION SEASONS

Souza, Ênio Gomes Flôr; Lima, Edson Ferreira De; Júnior, Aurélio Paes Barros; Silveira, Lindomar María da; Neto, Francisco Bezerra; Cruz, Ellen Abreu da

doi:10.1590/1983-21252017v30n214rc

Cited by 11 publications

(11 citation statements)

References 16 publications

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“…12 t ha -1 on a fresh weight basis. These amounts are in line with green manure produc- tion rates (Sakai et al, 2011;Souza et al, 2017). In the 32 Pi-only treatments, 150 µL of 10 mg 32 P mL -1 was well mixed with 25 g of soil and added to each sub-compartment to again provide a total of 3 mg 32 P per rhizotron.…”

Section: Rhizotron Designmentioning

confidence: 72%

Phosphorus acquisition by wheat from organic and inorganic sources labelled with 32P and 33P radioisotopes

Scrase

Sinclair

Farrar

et al. 2020

Sci. agric. (Piracicaba, Braz.)

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Investment in soil phosphorus (P) capital in the tropics is often constrained by poor availability of mineral fertiliser to small-scale farmers. Consequently, new sustainable agricultural cropping strategies are required to maintain fertility and maximise crop yields. The co-application of Tithonia diversifolia (Tithonia) green manure and mineral fertiliser (KH 2 PO 4 ) together (integrated nutrient management) in comparison to the addition of one or the other alone has been hypothesized to promote crop P uptake. The aim of this study was to critically evaluate the benefits of integrated nutrient management practices in laboratory experiments. Wheat was grown as a test crop in microcosms to which either 32 P-labelled mineral fertiliser or 33 P-labelled Tithonia was added either singly or in combination. Exclusion meshes were used to determine the role of arbuscular mycorrhizal (AM) fungi in P uptake from the different P sources. The rate of uptake of both 32 P and 33 P by mycorrhizas was similar, and the rate of mycorrhizal P capture was comparable to that of roots. Generally, there was little difference in wheat P acquisition under integrated nutrient management treatments in comparison to P acquisition from 32 P-mineral fertiliser or the addition of 33 P-Tithonia alone. Overall, Tithonia residues were not very effective in supplying P to wheat over a short time evaluation period, suggesting that mineral fertilisers will still be required to satisfy crop demand.

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Section: Rhizotron Designmentioning

confidence: 72%

Phosphorus acquisition by wheat from organic and inorganic sources labelled with 32P and 33P radioisotopes

Scrase

Sinclair

Farrar

et al. 2020

Sci. agric. (Piracicaba, Braz.)

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“…thus resulting in the reduction of the characteristic under analysis after the maximum point (Almeida et al, 2015). Another factor that may be related to this behavior of the tuberous vegetable is the proper synchrony between the decomposition and mineralization of green manures added to soil and time of the greatest nutritional demand of the culture (Souza et al, 2017).…”

Section: Agronomic Characteristics Of Beetroot Culturementioning

confidence: 99%

Beetroot and radish production under different doses of green manures

Lino

Neto

Lima

et al. 2021

RSD

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Green manuring with spontaneous species from Caatinga biome has become an important strategy in production vegetables. One of the great challenges in tuberous vegetables production is to define an optimized quantity that provides a high productive yield with economic efficiency of production system. The objective of this study was to optimize agronomically and economically the production and its components of tuberous crops of beetroot and radish when manured with different amounts of green manures biomass, Merremia aegyptia and Calotropis procera from Caatinga biome, in two cropping seasons. The experimental design was a randomized complete block with five treatments and five replications. Treatments consisted of green manures amounts (16, 26, 36, 46, 56 t ha-1). The maximum agronomic efficiency of beetroot and radish was obtained with incorporation of 49.87 and 39.43 t ha-1 of M. aegyptia and C. procera, respectively, and the production maximum economic efficiency was reached when 36.14 and 36.48 t ha-1, respectively, of biomass of these green manures were added to the soil. The returns rate obtained in beetroot and radish cultivation using the manures optimized amounts were 1.42 and 1.32 reais obtained for each real invested in the production of these tuberous.

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“…] stand out due to their availability, ease of obtaining, high fresh mass production, and high N contents (BATISTA et al, 2016). Some studies have been conducted using these species, which have shown good results as soil fertilizers for leafy and root vegetables and increased commercial yields for single crops (GÓES et al, 2011;SILVA et al, 2011;BEZERRA NETO et al, 2014;OLIVEIRA et al, 2015a;SOUZA et al, 2016;SOUZA et al, 2017;SILVA et al, 2017;SOUZA et al, 2019;NUNES et al, 2020) and intercrops (ALMEIDA et al, 2015;OLIVEIRA et al, 2015b;BEZERRA NETO et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

ECONOMIC VIABILITY OF BEET CROPS USING Calotropis procera BIOMASS AS SOIL FERTILIZER IN TWO GROWING SEASONS1

Santana¹,

Souza

Santos

et al. 2021

Rev. Caatinga

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The use of green manure from spontaneous species has gained prominence for vegetable crops focused on environmental sustainability and is an alternative method for the Semiarid region in the Northeast of Brazil. Two experiments were conducted in two growing seasons (autumn and spring-summer), in Serra Talhada, PE, Brazil, to evaluate the effects of different amounts of biomass of Calotropis procera (roostertree) and incorporation times on the agro-economic performance of beet crops. A randomized block experimental design was used, with three replications, in a 4 × 4 factorial arrangement; the first factor consisted of amounts of C. procera biomass (5.4, 8.8, 12.2, and 15.6 Mg ha-1 on a dry basis) and the second factor consisted of times of incorporation into the soil (0, 10, 20, and 30 days before planting beet). Commercial root yield, production costs, and the following economic indicators were determined: gross income, net income, return rate, and profitability index. The use of 15.6 Mg ha-1 of C. procera biomass resulted in the highest gross and net incomes and the use of 5.4 and 12.2 Mg ha-1 resulted in the best return rates and profitability indexes in autumn and spring-summer seasons, respectively; the planting time was considered as ideal for the biomass incorporation. The spring-summer growing season resulted in a higher economic return than the autumn growing season. The use of C. procera as a green manure for beet production is economically viable, regardless of the factors evaluated.

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PRODUCTION OF LETTUCE UNDER GREEN MANURING WITH Calotropis procera IN TWO CULTIVATION SEASONS

Cited by 11 publications

References 16 publications

Phosphorus acquisition by wheat from organic and inorganic sources labelled with 32P and 33P radioisotopes

Phosphorus acquisition by wheat from organic and inorganic sources labelled with 32P and 33P radioisotopes

Beetroot and radish production under different doses of green manures

ECONOMIC VIABILITY OF BEET CROPS USING Calotropis procera BIOMASS AS SOIL FERTILIZER IN TWO GROWING SEASONS1

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