Growth rate and nutritional status of an organic coffee cropping system

Ricci, Marta dos Santos Freire; Alves, Bruno José Rodrigues; Miranda, Simone Cordeiro de; Oliveira, Fábio Freire de

doi:10.1590/s0103-90162005000200008

Cited by 20 publications

(17 citation statements)

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“…Em café orgânico cultivado em consórcio com a C. juncea, Ricci et al (2005) verificaram, por ocasião do corte aos 175 DAS da leguminosa, aporte de 444; 21; 241; 191 e 44 kg ha -1 de N, P, K, Ca e Mg, respectivamente, presentes em 16 t ha -1 de massa de matéria seca. Em consórcio taro com C. juncea , Puiatti et.…”

Section: Resultsunclassified

Desempenho da araruta ‘Viçosa’ consorciada com crotalária

Vieira

Colombo

Puiatti

et al. 2015

Agraria

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RESUMOO objetivo do trabalho foi avaliar o desempenho produtivo e o teor de amido nos rizomas da araruta comum 'Viçosa' cultivada em consórcio com a Crotalaria juncea. O delineamento utilizado foi o de blocos ao acaso, com quatro repetições. Constou-se de quatro tratamentos resultantes de três cultivos consorciados da araruta com Crotalaria juncea, com o corte da crotalária efetuado aos 90, 120 e 150 dias após a semeadura (DAS) e o controle (monocultura da araruta). Em cada época de corte da crotalária foram avaliados comprimento das plantas de araruta, aporte de massa e de nutrientes pela crotalária e incidência de plantas invasoras. Na colheita, além da produtividade de rizomas, foram estimadas a exportação de nutrientes e produção de amido pelos rizomas. O consórcio proporcionou maior comprimento das plantas de araruta e menor incidência de plantas invasoras na área. O corte da crotalária realizado aos 90 DAS proporcionou maior produtividade de rizomas de araruta e de amido, com aporte, pela crotalária, de 29,7 t ha -1 de matéria fresca e de 120; 18; 127; 46 e 6 kg ha -1 de N, P, K, Ca e Mg, respectivamente. Para a maioria desses nutrientes a quantidade exportada pelos rizomas da araruta foram inferiores aos aportados pela crotalária indicando a possibilidade de melhorias na fertilidade do solo. Palavras-chave: adubação verde, Crotalaria juncea, Maranta arundinacea, produtividade Performance of arrowroot 'Viçosa' intercropped with sunnhemp ABSTRACTThe aim of this study was to evaluate the productive performance and starch content of rhizomes from common arrowroot 'Viçosa' cultivated in an intercropping with sunnhemp (Crotalaria juncea). A randomized-blocks experimental design with four replicates was adopted. Treatments consisted of three crops of arrowroot intercropped with sunnhemp, with the sunnhemp being harvested at 90, 120, and 150 days after seeding (DAS), plus a control treatment (arrowroot monocrop). At each sunnhemp harvesting time, the length of arrowroot plants, mass and nutrient production by sunnhemp, and incidence of invasive plants were evaluated. At harvesting, in addition to rhizome productivity, nutrients and starch production by the rhizomes were evaluated. The intercropping provided a greater arrowroot plant length and lower incidence of invasive plants in the area. The sunnhemp harvest performed at 90 DAS provided greater productivity of arrowroot rhizomes and starch, with the sunnhemp producing 29.7 t ha -1 of fresh matter, and 120, 18, 127, 46, and 6 kg ha -1 of N, P, K, Ca, and Mg, respectively. For most of these nutrients, the amount exported by the arrowroot rhizome was lower than that produced by the sunnhemp, indicating the possibility of improvements in soil fertility.

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Section: Resultsunclassified

Desempenho da araruta ‘Viçosa’ consorciada com crotalária

Vieira

Colombo

Puiatti

et al. 2015

Agraria

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“…The use of vigorous seeds is essential for ensuring economic viability and sustainability of agro-ecosystems, specially for species such as sunn hemp (Crotalaria juncea L.), which has contributed to performance of various crops: coffee (RICCI et al, 2005), rice (JESUS et al, 2007), sugarcane (DUARTE-JUNIOR & RABBIT, 2008) and maize (AMBROSANO et al, 2009). Sunn hemp also contributes to control weeds and nematodes (COLLINS et al, 2008) in addition to reduction of agricultural inputs used, because it can provide considerable amount of nitrogen for other crops (DINIZ et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Accelerated aging as vigor test for sunn hemp seeds

2017

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This study aimed to determine the most appropriate method to assess the sunn hemp ( Crotalaria juncea L.) seed vigor in the accelerated aging test. Five seed lots from harvest 2007/2008 were evaluated for germination, vigor and seedling emergence in the field. Accelerated aging test was performed at 41°C during 48, 72 and 96 hours, with and without sodium chloride saturated solution. Then, the promising procedure was also performed for 2008/2009 and 2009/2010 harvests. In the traditional accelerated aging test, the no-uniform water acquisition by the seeds adversely affected results. Accelerated aging test with sodium chloride saturated solution is the most appropriate method to evaluate the physiological potential of sunn hemp seeds, and the combination of 41°C and 96 hours is efficient for separating of seed lots in different vigor levels.

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“…In addition to the high demand for fossil fuels and energy for their acquisition, the use of synthetic N fertilizers increases the costs of production (EFMA, 2000), which compromises their sustainable use. Green manuring is an agricultural practice that may benefit the agroecosystem by improving soil fertility through the contribution of N via biological fixation and the increase of soil organic matter (SOM) (RICCI et al, 2005;DELARMELINDA et al, 2010;PERIN et al, 2010;PARTELLI et al, 2011;ARAÚJO et al, 2014). Therefore, green manuring is a strategic tool in soil fertility management, especially in production systems that excel in sustainability.…”

Section: Introductionmentioning

confidence: 99%

Changes in the stocks of C and N in organic matter fractions in soil cropped with coffee and fertilized with sunn hemp and ammonium sulfate

Pereira

Neto

Santos

et al. 2018

SCA

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Despite the potential to provide N to crops, the rapid incorporation of green manure nutrients into stable fractions of organic matter in the soil (SOM) may reduce the efficiency of green manuring. Thus, the objective of this work was to characterize the changes of C and N stocks in fractions of SOM cultivated with coffee (Coffea arabica L.) and fertilized with sunn hemp (Crotalaria juncea) and ammonium sulfate. To study the changes in organic C (OC) and total N (TN) in soil and fractions of SOM over time, soil samples were collected in the 0-5 and 5-10 cm layers, with the initial sampling done prior to the application of sunn hemp residues and ammonium sulfate. Five samples were collected every 2 months after the application of the legume and ammonium sulfate. The soil samples were submitted to densimetric and granulometric fractionation, obtaining the free light organic matter (F-LOM), particulate organic matter (POM), and organic matter associated with minerals (MAM). OC and TN stocks were then determined in soil and the SOM fractions. The changes in the stocks of OC (ΔStcC) in the soil in relation to time zero were positive in the evaluations carried out in the two layers. The fractions of SOM showed positive ΔStcC at almost all of the evaluated times. The N supplied to the soil in the form of mineral and organic fertilizer promoted an increase of 0.24 Mg ha -1 of N in the 0-5 cm layer until after 60 days. Of this total, 0.03 Mg ha -1 was associated with F-LOM, 0.07 Mg ha -1 with POM, and the remainder was associated with MAM. Nearly 60% of the N that was supplied to the soil was drawn to the stable fractions of the SOM, indicating a rapid stabilization of this nutrient in the most recalcitrant organic compartments. Despite that, the variations in N stocks of MAM became smaller over time, and eventually became negative, in relation to time zero. This indicates the mineralization of N of this compartment. In the 5-10 cm layer, no effect of time was observed in the soil TN, N-POM, or N-MAM stocks. Additionally, under the conditions of this experiment, the majority of the N supplied to the soil was rapidly incorporated into the most stable fraction of SOM, and this might can reduced the efficiency of the green manuring. ResumoApesar do potencial para fornecer N aos cultivos, a rápida incorporação dos nutrientes do adubo verde em frações estáveis da matéria orgânica do solo (MOS) pode reduzir a eficiência da adubação verde. Portanto, objetivou-se com este trabalho caracterizar as alterações temporais dos estoques de C e N em frações da matéria orgânica de solo cultivado com cafeeiro (Coffea arabica L.) e adubado com crotalária (Crotalaria juncea) e sulfato de amônio. Para estudar o comportamento do C orgânico (CO) e N total (NT) no solo e nas frações da MOS ao longo do tempo, foram coletadas amostras de solo nas camadas de 0-5 e 5-10 cm, sendo a primeira amostragem antes da aplicação dos resíduos de crotalária e sulfato de amônio. Outras cinco amostras foram coletadas a cada dois meses após a aplicação ...

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Growth rate and nutritional status of an organic coffee cropping system

Cited by 20 publications

References 1 publication

Desempenho da araruta ‘Viçosa’ consorciada com crotalária

Desempenho da araruta ‘Viçosa’ consorciada com crotalária

Accelerated aging as vigor test for sunn hemp seeds

Changes in the stocks of C and N in organic matter fractions in soil cropped with coffee and fertilized with sunn hemp and ammonium sulfate

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