Densidade de plantio e idade de colheita de quebra-pedra [Phyllanthus amarus (Schumach. & Thonning) genótipo Unicamp-CPQBA 14] na produtividade de filantina

• Autor(a) principal: Almeida, Chrystian Iezid Maia e [UNESP]
• Data de Publicação: 2011
• Outros Autores: Ming, Lin Chau [UNESP], Marques, Márcia Ortiz Mayo, Magalhães, Pedro Melillo de, Queiroz, Sonia Claudia do Nascimento de, Scramin, Shirley, Mischan, Martha Maria [UNESP], Montanari Júnior, Ílio, Pereira, Benício, Ferreira, Maria Izabela [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S1516-05722011000500021; http://hdl.handle.net/11449/141443; http://hdl.handle.net/11449/141869
• topic: Cultivation of medicinal plants; Ecophysiology; Phytochemical quality; Stone breaker; Quebra-pedra; Cultivo de plantas medicinais; Ecofisiologia; Qualidade fitoquímica

The effect of planting density and age of Phyllanthus amarus- genotype CPQBA-14, on the content and productivity of phyllanthin were evaluated. The experimental design was randomized blocks in factorial scheme 4 x 6, with five replicates, consisting of 4 treatments of planting density (400.000 pl ha-1; 200.000 pl ha-1; 100.000 pl ha-1 and 66667.68 pl ha-1) with six ages of plants (30, 45, 60, 75, 90 and 105 days after transplanting (DAT)). Data were subjected to analysis of variance and regression (P>0.005). For phyllanthin content independent and significant effects of harvest and planting density were observed. The phyllanthin contents increased with plant age, peaking at 105 DAT, with a content of 11.52 g kg-1. The estimated population density that provided the high phyllanthin contents (8.66 g kg-1) was at 299.860 pl ha-1. The productivity of phyllanthin showed significant interaction between planting density and plants ages. It was observed during the plant growth, the treatments with 200 and 400.000 pl ha -1 had the highest yield of phyllanthin (39.3 and 37.8 kg ha-1) with 95.17 and 97.12 DAT, respectively. We conclude that the proper spacing for best spatial arrangement of the cultivation is 299.860 pl ha-1 for the yield of 3974.19 kg (dry weight leaf) x 0.00866 kg (phyllanthin contents) = 34.416 kg ha-1 of phyllanthin with harvest scheduled at 97 DAT.