%0 Journal Article
%T Growth and nodulation of soybean plants fertilized with poultry litter Desenvolvimento e nodula  o de plantas de soja adubadas com cama de aves
%A Vilmar Antonio Ragagnin
%A Darly Geraldo de Sena J¨²nior
%A Danyllo Santos Dias
%A Weslley Fernandes Braga
%J Ci¨ºncia e Agrotecnologia
%D 2013
%I Universidade Federal de Lavras
%X Nowadays much of the chemical fertilizers used in Brazil come from imports, what creates the necessity to seek for alternative fertilizers. One possibility is organic fertilizers, including poultry litter, which presents increasing availability in various regions of the country, due to the expansion of the poultry industry. Despite its availability, there are no enough studies that show the benefits of using poultry litter on soybeans in substitution of mineral fertilizer. The present study aimed to evaluate the effect of different doses of poultry litter on leaf chlorophyll content, nodulation, and development of soybean plants. It was used a completely randomized design with five doses of poultry litter (0, 1, 2, 4 and 8 t ha-1) and a control with mineral fertilizer with four repetitions. On stages R1 and R5, chlorophyll readings were done using a portable meter and also the measurement of plant height. Plants were cut near the surface, roots were washed and the nodules were detached and counted. After that, it was determined the dry weight of plant roots, nodules, and shoots. Soybean fertilization with poultry litter increases the chlorophyll content of leaves, plant height, shoot dry matter, root dry matter, and nodulation. The use of poultry litter on soybean favors its growth with decreasing increments, except for root dry matter, and with an optimum dose for each variable. The supply of poultry litter can replace mineral fertilizers in terms of soybean growth. Atualmente, boa parte dos fertilizantes utilizados no Brasil ¨¦ importada, o que cria a necessidade de busca por fertilizantes alternativos. Uma possibilidade s o os fertilizantes organicos, incluindo a cama de aves, que apresenta crescente disponibilidade em v¨¢rias regi es do pa¨ªs, em raz o da expans o da ind¨²stria av¨ªcola. Apesar da disponibilidade e potencial, n o h¨¢ estudos suficientes que mostrem os benef¨ªcios do uso da cama de aves na cultura da soja em substitui  o ao fertilizante mineral. No presente trabalho, objetivou-se avaliar o efeito de diferentes doses de cama de aves no teor de clorofila nas folhas, nodula  o e desenvolvimento de plantas de soja cultivadas em casa de vegeta  o. Foi utilizado um delineamento inteiramente casualizado com cinco doses de cama de aves (0, 1, 2, 4 e 8 t ha-1) e testemunha com fertilizante mineral com quatro repeti  es. Nos est¨¢gios R1 e R5, leituras do teor de clorofila foram realizadas com um medidor port¨¢til bem como a medi  o de altura de plantas. As plantas ent o foram cortadas rente ao solo, as ra¨ªzes lavadas e os n¨®dulos destacados e contados
%K Fertilizantes organicos
%K Glycine max
%K clorofila
%K Organic fertilizer
%K Glycine max
%K chlorophyll
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000100002