Data/hora: 09/06/2024 06:49:26

Biblioteca(s): 	Embrapa Unidades Centrais.	
Data corrente: 	05/08/2002	
Data da última atualização: 	14/06/2019	
Autoria: 	ALAA-ELDIN, M.N.; MAHMOUD, S. A. Z.; MAKAWI, A.; ABDEL-NASSER, M.; HERZALLAH, N. A.	
Título: 	Effect of pre-emergence application of some herbicides on nodulation, nitrogen fixation and growth of soybean.	
Ano de publicação: 	1981	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 16, n. 6, p. 833-839, nov./dez. 1981	
Idioma: 	Inglês	
Notas: 	Título em português: Efeito da aplicação de alguns herbicidas à pré-emergência sobre a nodulação, a fixação de nitrogênio e o crescimento da soja.	
Conteúdo: 	Aretit at the reconimended rate (XI) and treflan, especiaily at high concentration (x 5 foids), stimulated nodulation of soybean 'Ciark' , while planavin, cobex or linuron, especiaily at high concentration inhibited nodule formation and even, in some instances, prevented plant growth. In all herbicidal treatments, the dry matter content of whole plant on the second harvest (92 days or pod filling) was lower, even those which showed stimulation at the First harvest (49 days or full bloom) than the control; the yields of pods obtained on maturíty were also lower. In general, total-N conterits of shoots, roots and pods as well as yield of total-N seemed to be affected by the appljcation of herbicides. The cffect differed according to herbicides concentration and growth stages of the plant. Nitrogenase activity as a measure of biological fixation of atmospheric nitrogen using the acetylene-reduction technique was also carríed out for root nodules to investigate effect of aretit or treflan on the symbiotic N-fixation processes. The dehydrogenase (DHA) activity in nodule homogenate was also determined in presence or absence of succinate, citrate or ethanol to investigate the effect of herbicidal treatments on respiratory chain of bacteroids. nis was claimed to thraw light on effect of herbicidal treatrnents on capacity of the legume plant (soybean 'Clark' ) to supply the symbiont (R. japonicum) in the root nodules with some products (hydrogen doners) of the Kreb's cycle and consequently thus affects nitrogen fixation efficieney ofroot nodules.	
Thesaurus Nal: 	Nodulation; Plant growth; Soybeans.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/198615/1/Effect-of-pre-emergence-application.pdf	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (22971-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS