Data/hora: 01/07/2024 15:02:34

Biblioteca(s): 	Epagri-Sede.	
Data corrente: 	25/11/2021	
Data da última atualização: 	25/11/2021	
Autoria: 	GIUMBELLI, L. D.; LOSS, A.; KURTZ, C.; MAFRA, Á. L.; PICCOLO, M. C.; TORRES, J. L. R.; LOURENZI, C. R.; COMIN, J. J.; BRUNETTO, G.	
Título: 	Combinations of Plant Species for Rotation With Onion Crops: Effects on the Light Fraction, Carbon, and Nitrogen Contents in Granulometric Fractions of the Soil Organic Matter.	
Ano de publicação: 	2021	
Fonte/Imprenta: 	Journal of Agricultural Studie, Las Vegas, v. 9, n. 1, p. 202-230, 2021.	
Idioma: 	Inglês	
Conteúdo: 	The conversion of conventional tillage system (CTS) into no-tillage system (NTS) for onion
crops with use of soil cover crops increases carbon and nitrogen contents in the soil
aggregates. The objective of this work was to evaluate the effects of combinations of different
plant species and soil management systems using rotation with soil cover crops for onion
crops on the light organic matter (LOM), carbon (C), and nitrogen (N) contents in the organic
matter granulometric fractions in soil macroaggregates and bulk soil. A nine-year experiment
(2007-2016) was conducted using the treatments (T): maize-onion in NTS (T1); soil cover
crops (winter)-onion in NTS(T2); maize-winter grasses-onion in NTS (T3); velvet
bean-onion in NTS (T4); millet-soil cover crops (winter)-onion in NTS (T5); velvet
bean-rye-onion in NTS (T6); maize-onion in CTS (T7); intercropped soil cover crops
(summer)-onion in NTS (T8). C and N contents in the LOM, particulate organic C and N
(POC and PON), and mineral- associated C and N (MOC and MON) were evaluated in soil
macroaggregates (8.0 to 2.0 mm) and bulk soil (<2.0 mm) from the 0?5 cm, 5?10 cm, and
10?20 cm layers. High diversity and combinations of plant species in T2-T6, and T8 resulted
in higher POC and MON contents in aggregates, and higher MOC and PON contents in bulk
soil, when compared to T1 and T7. T2 was a better option to increase LOM and POC
contents in aggregates (0-5 cm). The evaluation of POC (0?5 cm), PON, and MON (0-10 cm)
contents in soil aggregates showed more significant differences between the treatments than
the contents found in bulk soil. The onion crops under NTS combined with use of rotations
with soil cover crops were more efficient to improve the evaluated soil attributes than those
under CTS.	
Palavras-Chave: 	bulk soil; cover crops; nitrogen particulate; no-tillage system; particulate organic carbon; soil aggregates.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_50357.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
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