Effect of fertilization on weeds and on the period before weed interference in the peanut culture

Planta Daninha

Universidade Estadual Paulista Júlio Mesquita Filho¹  Nepomuceno, M.¹  Yamauti, M.S.¹  Alves, P.L.C.A.¹  UNESP, Jaboticabal¹  Martins, J.V.F.¹  UNESP¹ 

关键词: Arachis hypogaea;    competition;    fertilization;    plant sociology.;   

DOI  :  10.1590/S0100-83582010000500011

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

This experiment was carried out to study the effect of fertilization on weed community and on the period before weed interference (PBI) in peanut culture, IAC Runner 886, under a conventional till system. The weed control periods studied were: 0, 7, 15, 20, 30, 45, 55, and 126 days after emergence (DAE), totaling eight treatments, arranged in a randomized block design, with four replications and two levels of fertilization (0 and 150 kg ha-1 of formulation 00-20-20 (N-P-K)). Fertilization did not affect the weed community, with the species Cyperus rotundus, Eleusine indica, Indigofera hirsuta, Portulaca oleracea and Sida rhombifolia being the most prominent at all levels of fertilization. However, weed density was higher in the non- fertilized area, but without particularly affecting the dry mass accumulated by these species. Peanut can grow along with the weed community, with and without fertilization, up to 15 and 17 DAE, without significant yield losses. Weed interference reduced peanut productivity between 31 and 34% for both the fertilized area and the area without fertilization, respectively.

【 授权许可】

Unknown