Influence of NPK Fertilization on the Growth and Nutrition of Parica in the Field

Resumo

Abstract

When it comes to forest species it is known that fertilization increases the biomass of the plants, their development and nourishes them, leaving them more strengthened to cope with environmental weather and produce. Therefore, a study was carried out to analyze the growth of S. amazonicum in the field, after fertilization. The seedlings were produced by seeds, when reached 15 cm were transplanted to plastic bags containing soil that was limed and fertilized, according each tested treatment. The fertilizations tested were: N = 0, 40, 80 and 120 kg ha^-1; P₂O₅ = 0, 50, 100 and 200 kg ha^-1 e; K₂O = 0, 50, 100 and 200 kg ha^-1. At 180 days the seedlings on the 20 treatments that presented the highest growth were planted in the field. The soil was limestoned and fertilized, and the seedlings were distributed in randomized blocks with six replicates. Growth of the seedlings was analyzed at 3, 6, 9 and 12 months. After 12 months, the plants were submitted to analyze of dry biomass, macro and micronutrient contents. The fertilization influenced the growth of S. amazonicum, recommending 80 kg ha^-1 of N, 200 kg ha^-1 of P₂O₅ and 50 kg ha^-1 of K₂O.

Keywords: Schizolobium amazonicum. Mineral Fertilizer. Forest Soil.

Resumo

Quando se trata de espécies florestais sabe-se que a adubação aumenta a biomassa das plantas, seu desenvolvimento e as nutre, deixando-as mais fortalecidas para enfrentar as intempéries ambientais e produzir. Portanto, foi realizado um estudo para analisar o crescimento de S. amazonicum no campo, após a fertilização. As mudas foram produzidas a partir de sementes, quando atingiram 15 cm foram transplantadas para sacos plásticos contendo solo, que foi corrigido e adubado, de acordo com cada tratamento testado. As adubações testadas foram: N = 0, 40, 80 e 120 kg ha^-1; P₂O₅ = 0, 50, 100 e 200 kg ha^-1 e; K₂O = 0, 50, 100 e 200 kg ha^-1. Aos 180 dias, as mudas dos 20 tratamentos que apresentaram maior crescimento foram plantadas no campo. O solo foi calcareado e adubado conforme as doses citadas, e as mudas foram distribuídas em blocos casualizados com seis repetições. O crescimento das mudas foi analisado aos 3, 6, 9 e 12 meses. Após 12 meses, as plantas foram submetidas à análise de biomassa seca e teores de macro e de micronutrientes. A adubação influenciou o crescimento de S. amazonicum, recomendando-se 80 kg ha^-1 de N, 200 kg ha^-1 de P₂O₅ e 50 kg ha^-1 de K₂O.

Palavras-chave: Schizolobium amazonicum. Fertilizante Mineral. Solo Florestal.