Influência Da Adubação Fosfatada E Coberturas Vegetais Na Qualidade De Sementes De Feijão

Abstract

Resumo: Para auxiliar empresas produtoras de sementes na Objetivou-se com este trabalho, avaliar os efeitos das palhadas formadas por diferentes cultivos sobre a qualidade fisiológica de sementes de feijoeiro submetida a doses crescentes de P em semeadura. A pesquisa foi conduzida no período de inverno de 2010 e 2011, no Município de Selvíria, MS. O delineamento experimental foi o de blocos casualizados, em esquema de parcelas subdivididas com quatro repetições. As parcelas foram constituídas por: milheto, crotalária, guandu, mucuna-preta, milheto + guandu, milheto + crotalária e milheto + mucuna e pousio. As subparcelas foram constituídas por ausência de adubação fosfatada e doses de P2O5 (60, 90 e 120 kg ha-1) na forma de monoamônio fosfato (MAP). Avaliaram-se o teste de germinação e teste de emergência de plântulas no campo. Conclui-se que apesar dos tratamentos avaliados terem influenciados a qualidade fisiológica das sementes de feijão, as sementes apresentaram boa germinação e vigor acima de 80% em todos os testes realizados. PALAVRAS-CHAVE:Phaseolus vulgaris, manejo da adubação fosfatada, germinação, vigor. Abstract:The objective of this work was to evaluate the effects of weeds formed by different crops on the physiological quality of common bean seeds subjected to increasing doses of P at sowing. The research was conducted in the winter period of 2010 and 2011, in the Municipality of Selvíria, MS. The experimental design was a randomized complete block design with four replications. The plots consisted of: millet, crotalaria, guandu, mucuna-preta, milheto + guandu, milheto + crotalaria and milheto + mucuna and fallow. The subplots were constituted by absence of phosphate fertilization and doses of P2O5 (60, 90 and 120 kg ha-1) in the form of monoammonium phosphate (MAP). The germination test and seedling emergence test were evaluated in the field. It was concluded that although the evaluated treatments influenced the physiological quality of the bean seeds, the seeds presented good germination and vigor above 80% in all the tests performed.

Common bean seed quality as affected by cover crop mixtures and nitrogen fertilization

“…The importance of cover crops in protecting the soil surface and therefore increasing plant-available water is well-known (Nielsen et al, 2015) and may have a key role in seed production. Abrantes et al (2015) and Silva et al (2017) reported that common bean plants under straw-covered soils produced seeds with higher final germination percentage (92-98%) compared to bare soils (76-88%). Furthermore, the use of cover crops may lead to an increase of nutrient availability to the parent plant during the period of seed filling, resulting in high quality seeds.…”

“…However, little is known about the influence of cover crops, primarily grass-legume mixtures, on the physiological quality of common bean seeds. To the best of our knowledge, only two studies have assessed the influence of cover crops on common bean seed quality (Abrantes et al, 2015;Silva et al, 2017). In addition, topdressing N fertilization is a widespread practice to sustain high yields of common bean.…”