Knowledge on the ideal conditions for the formation of high quality seedlings is fundamental to guarantee establishment success of crops in a safe and efficient manner. Here, we evaluate the effect of different substrates and irrigation frequencies on the initial growth of parica (Schizolobium parahyba var. amazonicum) seedlings. The experiment was conducted in a greenhouse at the Federal Rural University of Amazônia, Capitão Poço, PA. Several variables were analyzed including seedling height, stem diameter, number of leaflets, shoot dry matter, root dry matter, total dry matter, height and stem diameter ratio, shoot dry matter ratio and root dry matter. We found significant differences in seedling development between the applied treatments, including a significant interaction between substrate type and irrigation regime on seedling height, stem diameter, the number of leaflets and plant growth indices, with the best response for proportions 75% soil + 25% bovine manure and 50% soil + 50% bovine manure. Therefore, the substrates containing organic compounds resulted in a higher quality of the seedlings, while the sand consistently presented the lowest increases in seedling production under the three experimental irrigation frequencies, and thus is not recommended as a substrate for the development of Schizolobium parahyba var. amazonicum.
RESUMO Com o aumento da preocupação com reflorestamento é de grande importância o conhecimento sobre o sistema de produção das espécies florestais nativas com potencial para esse setor. Nesse sentido, objetivou-se avaliar diferentes substratos no crescimento de mudas de guapuruvú. O experimento foi conduzido em casa de vegetação na Universidade Federal Rural da Amazônia, campus de Capitão Poço, durante maio à julho de 2014. O delineamento experimental adotado foi o inteiramente casualizado, constituído de 5 substratos: a) solo local; b) areia lavada; c) 75% de solo + 25% de esterco bovino; d) 50% de solo + 50% esterco bovino e; e) 75% de solo + 25% de esterco caprino, com 4 repetições. As variáveis avaliadas foram altura de planta (AP), número de folíolos (NFOL), massa seca da parte aérea (MSPA), da raiz (MSRA) e massa seca total (MST). Os dados experimentais foram submetidos à analise de variância e as médias foram submetidas ao teste de Tukey, à 5% de probabilidade. Para as variáveis analisadas os substratos 50% solo + 50% esterco bovino e 75% solo + 25% esterco bovino apresentaram as melhores respostas. A areia não é recomendada como substrato. PALAVRAS-CHAVE: agricultura, biomassa, povoamento florestal EFFECT OF SUBSTRATES IN GUAPURUVU SEEDLINGS GROWTH (Schizolobium parahyba (VELL.) S. F. BLAKE) ABSTRACT The increasing concern over reforestation, it´s very important knowledge about the system of production of native species potential for this sector. In this sense, the objective was to evaluate different substrates on growth guapuruvú seedlings. The experiment was conducted in a greenhouse at the Federal Rural University of Amazonia, Capitão Poço campus, during May to July 2014. The experimental design was completely randomized, consisting of 5 substrates: a) local soil; b) washed sand; c) 75% soil + 25% of cattle manure; d) 50% soil + 50% cattle manure and; e) 75% soil + 25% goat manure, with four repetitions. The evaluated variables is plant height
RESUMOObjetivou-se, neste estudo, realizar a avaliação morfológica de ovinos tipo Santa Inês, adotando-se a análise fatorial. Foram utilizados 22 carneiros, 12 fêmeas e 10 machos inteiros. As medidas foram feitas, quinzenalmente, quando os animais atingiram peso vivo médio de 26,8 ± 5,2 kg e uma faixa etária de 4,5 meses. Foram medidos: altura da cernelha, da garupa e do costado; comprimento do corpo, da garupa, do dorso e escrotal; largura de garupa, do peito e púbis; perímetro escrotal e torácico. A analise fatorial foi empregada para verificar a existência de relações importantes entre as medidas morfométricas. Foram obtidos 5 fatores e as respectivas comunalidades. A análise fatorial foi eficiente em agrupar as medidas lineares, facilitando a visualização de relações importantes entre as medidas morfométricas, o que pode ser de grande importância para a determinação dos atributos corporais de carneiros destinados à reprodução e recria. SUMMARYThis study was made with the objective of realize a morphological evaluation of Santa Inês like ovines using the factorial analysis. Twenty two sheeps were used: 12 ewes and 10 rams. The measurements were taken every fifteen days, after the animals reached the average live weight of 26.8 ± 5.2 kg and were 4.5 months old. The following variables were measured: withers height, hindquarters height, back height; body length, hindquarters length, back length, scrotum length; hindquarters width, breast width; scrotal perimeter and thoracic perimeter. The factorial analysis was used in order to verify the existence of main relationships among morphometric measurements. Five factors were found and their respective communalities. The factorial analysis was efficient to group the linear measurements made ease the visualization of the main relationships among morphological measurements. These results can be of great importance in the determination of body attributes of sheep in both reproduction and meat production. INTRODUÇÃOO controle zootécnico é fundamental para se ter sucesso na ovinocultura, sendo o controle do desenvolvimento ponderal importante para o acompanhamento dos animais jovens que serão destinados à reprodução e abate.A análise fatorial tem como principal propósito avaliar as relações entre as variáveis observadas em função dos fatores, os quais são variáveis aleatórias latentes
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