Data/hora: 25/09/2024 14:58:59

Biblioteca(s): 	Embrapa Tabuleiros Costeiros.	
Data corrente: 	30/09/1998	
Data da última atualização: 	30/09/1998	
Autoria: 	LYND, J. Q.; ANSMAN, T. R.	
Título: 	Soil fertility effects on nodulation, nitrogen fixation, and yields of guar, (Cyamopsis tetragonoloba (L.) Taub.)grown on a typic eutrustox	
Ano de publicação: 	1989	
Fonte/Imprenta: 	Journal of Plant Nutrition, v.12, n.8, p.1069-1084, 1989.	
Idioma: 	Português	
Conteúdo: 	Guar (Cyamopsis tetragonoloba (L.) Taub.) is a legume of unusual industrial importance due to increased utilization of Guar gum, guran, in numerous modern manufacturing and food processes. Guar has high tolerance of drought and inhibitory soil characteristics and has been utilized for many centuries within the subhumid regions of the Indo-Pakistan subcontinent. Nodulation, nitrogen fixation, and yields of high protein seed with desirable Guran content are improved by favorable soil fertility. Plant growth, seed yields, and nodulation are influenced by plant population density. Top growth quadratically increased with plants population densities of 10, 25, and 50 plants per meter for P and P+K treatments. Highest seed yield and nodule development resulted for all soil fertility treatments with 25 plant per meter. Ontogenetic response from anthesis to full seed maturity resulted with increased nodulation significantly correlated (r + 0,67) with top growth. However, nitrogenase activity levels plant declined significantly with plant maturity. Nodule cytosol enzyme activity levels at anthesis were: allantoinase (ALTN) 29.5 IU, aspartate transaminase (AST) 19.3 IU, glutamine synthase 12.5IUg uricase(URC) 2.35 IU, and allantoicase (ALTC) 0.14 IUg1fresh nodule. Cytosol composition included ureidoglycolates(ureides) 425.8 mol, amine-amide content 29.5 mol, nitrate 1.95 mol, pyruvate 0.21 mol, and ketoglutarate o.o9 mol g1 fresh nodule. Plant nutrient composition of nodule cytosol was K 394.9 g, P 59.4 g, Ca 48,9 g, Mg 39.1 g, and Na 19,0 g g1 fresh nodule. Precise histology with giemsa and PAS procedures were essential for microscopy with cellular compartmentalization of purine enzymatic transformations governing nitrogenase activity and nodule development.	
Palavras-Chave: 	Fertility; Nitrogenio fixacao; Nodulation legume.	
Thesagro: 	Cyamopsis Tetragonoloba; Fertilidade; Guar; Solo.	
Thesaurus Nal: 	nitrogen fixation; soil.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Tabuleiros Costeiros (CPATC)	
Exemplares: 	CPATC - (17070-1) - ADD - SP - -- -  -  - SP004478 - DIS