Data/hora: 01/06/2024 00:52:56

Biblioteca(s): | Embrapa Soja.
Data corrente: | 27/11/1992
Data da última atualização: | 27/10/2004
Autoria: | HANSON, R. G.; CHARLES, K. E.
Afiliação: | Department of Agronomy University of Missouri, Columbia, MO, 65211 [USA].
Título: | Potassium and CL nutrition of soybean cultivar with genetic resistance to soybean cyst nematode.
Ano de publicação: | 1989
Fonte/Imprenta: | In: CONFERENCIA MUNDIAL DE INVESTIGACION EN SOJA, 4., 1989, Buenos Aires. Actas... Buenos Aires: AASOJA, 1989.
Volume: | t.1
Páginas: | p.352-362.
Idioma: | Inglês
Conteúdo: | Greenhouse and laboratory research studied K and Cl nutrition of four soybean, [Glycine max (L.) Merrill], cultivars with differential resistance to Soybean Cyst Nematode (SCN, Heterodera glycines Ichinohe). The cultivars: Forrest (Group V, resistant to races 1 and 3), Bradley (Group VI, resistant to races 1, 3 and 4), Essex (Group V, susceptible), and Davis (Group VI, susceptible) were used. Potassium treatments were zero K, K2SO4 and KCl and SCN treatment was zero and 500 eggs/100 g of previously sterilized soil. Single plants were grown for 30-days in 400 g of soil in 3.5 cm pots maintained at 23oC. Plants were separated into roots and shoots for analysis. Post harvest SCN cyst counts were completed to evaluate cultivar-K treatment effect on SCN population dynamics and treatment effects on root and shoot K, Ca, Mg and Cl. Cyst counts were a function of cultivar resistance and inoculation, and were not affected by K treatment. Root and shoot weights of all cultivars were lower in the SCN inoculated pots. Potassium treatments did not alter the SCN negative effect on root weight, but KCl appeared to reverse the negative effect that SCN inoculation had on shoot weight of Bradley. SCN inoculation appeared to reduce Cl concentration in the roots of all cultivars, increase root K of Bradley and no effect on root K of Davis. Essec and Forrest. Translocation of K from roots to shoots was not adversely affected by SCN inoculation. The KCl treatment increased shoot Cl concentration of cultivars in order Essex > Davis > For
Palavras-Chave: | Cyst; Genetic; Heterodera glycine; Mematode; Resistance; Soybean.
Thesagro: | Cisto; Genética; Nutrição; Potássio; Resistência; Soja.
Thesaurus Nal: | nutrition; potassium.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)