Data/hora: 21/09/2024 12:01:29

Biblioteca(s): 	Embrapa Unidades Centrais.	
Data corrente: 	18/10/2018	
Data da última atualização: 	25/02/2019	
Autoria: 	YAGI, R.	
Afiliação: 	Renato Yagi, Instituto Agronômico do Paraná - IAPAR/Polo Regional de Pesquisa de Ponta Grossa.	
Título: 	Occasional soil tillage, liming, and nitrogen fertilization on long-term no-tillage system.	
Ano de publicação: 	2018	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 53, n. 7, p. 833-839, July, 2018.	
Idioma: 	Inglês	
Notas: 	Título em português: Revolvimento ocasional do solo, calagem e adubação nitrogenada sobre sistema plantio direto de longa duração.	
Conteúdo: 	The objective of this work was to evaluate the residual effects of occasional soil tillage in a 17-year&#8209;old, no-tillage system, associated with liming and nitrogen fertilization, on the crop yields and chemical properties of a very clayey Oxisol in the South of Brazil. A randomized complete block design in split-split plots was used, with two soil managements (with or without plowing), two liming treatments (with or without the required dose to raise base saturation to 70%), five N doses applied on side-dress (0, 1, 2, 4, and 6 times the recommended amounts), and four replicates. A rotation system was used with corn and soybean in the summer, and with wheat and black oats in the winter. The residual effects of occasional soil tillage in a consolidated no-tillage system do not supplant those of liming applied on soil surface, in periods of water deficit, which subsidizes the recommendation to maintain the system consolidated. Excess N fertilization in no-tillage, with liming applied only on soil surface, may harm wheat yield, acidifying the topsoil and leaching Mg2+ to the subsurface soil layers. Without liming, soil acidification is more intense with N fertilization, which, however, favors the accumulation of organic matter on soil surface in a consolidated no-tillage system.	
Palavras-Chave: 	Calagem superficial; Consolidated no-tillage system; Deficit hídrido; Matéria orgânica do solo; Plantio direto consolidado; Soil acidity; Superficial liming.	
Thesagro: 	Acidez do Solo; Manejo do Solo.	
Thesaurus Nal: 	Soil management; Soil organic matter; Soil water deficit.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/184596/1/Occasional-soil-tillage.pdf	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (63186-1) - UPE - AP - DD -  -  -  - DIS