Data/hora: 01/06/2024 01:06:53

Biblioteca(s): 	Embrapa Gado de Corte.	
Data corrente: 	16/06/2004	
Data da última atualização: 	16/06/2004	
Autoria: 	FUKUDA, E.; KANNO, T.; MACEDO, M. C. M.; MIRANDA, C. H. B.; NAKAMURA, T.	
Afiliação: 	JIRCAS (Owashi, Japão).	
Título: 	Effects of termite activities on nutrient recycling in agro-pastoral system.	
Ano de publicação: 	2004	
Fonte/Imprenta: 	In: SUENAGA, K.; OSHIBE, A.; TANIGUHI, T. (Ed.). Development of sustainable agro-pastoral systems in the subtropical zone of Brazil. Tsukuba: JIRCAS, 2004.	
Páginas: 	p. 35-41.	
Série: 	(JIRCAS. Working Report, 36).  
	
Idioma: 	Inglês	
Notas: 	CNPGC. Proceedings of the Workshop on the results and prospects of comprehensive studies on the development of sustainable agro-pastoral systems in the subtropical zone of Brazil, 2003. 
	
Conteúdo: 	Termites play lading roles i the organic  matter decomposition and nutrient eycling in tropical and subtropical  zones. It is one of the most important subjects to know the effects of the termite activities on the soil fertility, grass growth and grazing cattle in the  subtropical pastures  in order to predict the dynamics of agro-pasotral systems and to ehance the  productivity and sustainability. The soil fertility, productivity and nutrient value of a grass Brachiaria decumbens, and grazing behavior of cattle were compared between the surroundings of mounds of a termite Cornitermes cumulans and the control areas remote from the mounds in subtropical pastures in Brazil. The total carbon and totral nitrogen rates of the surrounding soil increased with decreasing distance to mounds in the lower soil layers, while a clear tendency was not recognized in the upper layers The rates of height elongation, dry matter production and crude  protein production of the grasses per nit area were approximately 1,4, 1.6 and 2.1 times higher, respectively, around termite mounds than those at the control areas. It was observed that cattle grazed these nutritious and productive grasses around monds with much more frequency than those at the control areas, using cameras with an infrated rays sensor. As a result, the height of grasses was always maintained lower within 68cm, on average, of the margins of termite mounds. In the  surroundings of termite mounds, incrases in productivity and nutient value of grasses due to soil nutrient encrichment would cause the frequent and perferential grazing by cattle. It suggests that the occurrences of termite mounds would exert important influences on the grazing behavior and intake of nutrition, especially crude protein, of cattle and therefore beef production in subtropical pstures. This should be taken into consideration for management of subtropical pastures where C4 grasses with low crude protein content are predominant and persistence of legumes as major nitrogen sources for cattle is often difficult.  	
Palavras-Chave: 	Agropastoral systems; Cycling; Integração agricultura pecuária; Termites.	
Thesagro: 	Cupim; Disponibilidade de Nutriente; Isoptera; Pastagem.	
Thesaurus Nal: 	pastures.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Gado de Corte (CNPGC)	
Exemplares: 	CNPGC - (10500-1) - UPC - PL - -- - 630 - S944d -  - DIS