Ecophysiology and multivariate analysis for production of Tachigali vulgaris in Brazil:Influence of rainfall seasonality and fertilization  

作　　者：Pedro Henrique Oliveira Simoes Candido Ferreira de Oliveira Neto Manoel Tavares de Paula Dênmora Gomes de Araújo Rodrigo Silva do Vale Joao Olegário Pereira de Carvalho 

机构地区：[1]Universidade Federal de Mato Grosso,Campus Universitario de Sinop,Sinop 78550728,Mato Grosso,Brazil [2]Universidade Federal Rural da Amazonia,Campus Belem,Belem 66077830,Para,Brazil [3]Universidade do Estado do Para,Centro de Ciencias Naturais e Tecnologia,Belem 66095015,Para,Brazil [4]Universidade Federal Rural da Amazonia,Campus Capitao-Poco,Capitao Poco 68650000,Para,Brazil

出　　处：《Journal of Forestry Research》2023年第5期1289-1305,共17页林业研究（英文版）

基　　金：financed in part by the Coordenacao de Aperfeicoamento de Pessoal de Nível Superior–Brasil (CAPES)—Finance Code 001;supported by the Fundacoo Amazonia de Amparo a Estudos e Pesquisas—FAPESPA。

摘　　要：Studies on fertilization management of species native to the Amazon for energy plantations contribute to the diversity of species use and reduce biological risk due to the excessive use of clones or hybrids of Eucalyptus.This study evaluates the effect of precipitation seasonality and phosphorus and potassium fertilization on gas exchange in a Tachigali vulgaris plantation.Three levels of P(zero,65.2,130.4 kg ha^(-1))and three of K(zero,100.0,200.0 kg ha^(-1))were applied in a 3×3 factorial randomized block design.Gas exchange measurements were conducted in April and November 2018.In low rainfall,high irradiance period,photo synthetic rates were up to four times higher than in the high rainfall period,reaching 20.3μmol m^(-2)s^(-1)in the treatment with 130.4 g kg^(-1)of P and 100.0 g kg^(-1)of K.Factor analysis and principal component analysis reduced the initial eight gas exchange variables to two and three principal components in periods of high and low rainfall,respectively.The multivariate method used in this study readily identified variations in the variables as a function of rainfall,with high reliability in explaining the data set.

关 键 词：Photosynthesis rate Stomatal conductance Principal component analysis Factor analysis Tachigali vulgaris 

分 类 号：S718.5[农业科学—林学]