不同种源枫香磷响应指标的主成分分析

采用裂区砂培试验,研究枫香对 P 水平响应性状的相关性,进行了主成分分析,旨在找出影响其生物量的主导因子、不同种源的最适生长 P 浓度及优良耐 P 胁迫种源.相关分析表明,除 P 利用率具有一定的稳定性外,生物量与其他响应性状相关性显著;低 P 胁迫造成的 N 吸收利用的变化对枫香影响更大.主成分分析表明,枫香生物量差异的主导因子是 N、P 吸收性状,其次是 P 利用性状.标准化主成分得分排序认为南昌种源具有较好的 N、P 吸收利用机制;南丹种源具有较好的种源特性,P 利用率较稳定.根据我国土壤有效 P 含量多样性的现状筛选出具有广适性特点的南昌种源和具有较好耐低 P 胁迫特性的南丹种源.

Principal component analysis of response-related traits to phosphate rate in Formosan sweet gum provenances

Plot experiment was conducted to determine the dominant factors which influence the biomass,optimal phosphorus concentration of different provenances and excellent P stress-resistance-type provenances of Formosan sweet gum.Correlation analysis showed that,apart from stable P utilization,there were significant correlations between biomass of Formosan sweet gum and the other response-related traits,and the change of N absorption caused by low-phosphorus stress had a greater impact on the growth of Formosan sw...