期刊论文

Effects of shade and nutrient level on plant growth, module biomass allocation and PSII functions of Wedelia trilobata

中文

生态科学

1008-8873

2018

37

4

160-167

10.14108/j.cnki.1008-8873.2018.04.020

国家自然科学基金项目（31770584） 广东省科技发展专项资金（2016A030303063）

本校为其他机构

为探查外来入侵植物三裂叶蟛蜞菊(Wedelia trilobata)对遮荫和氮养分的响应及其入侵性,采用盆栽实验研究了遮荫(轻度遮荫-相对光强为42%;重度遮荫-相对光强为12%)和不同氮养分(0、0.1、0.2和0.4 g·kg~(–1))对三裂叶蟛蜞菊生长、生物量分配以及叶片PSⅡ功能的影响。结果表明: 1)经轻度遮荫的植物叶片数、分枝数、总生物量、生长速率显著大于重度遮荫;同一遮荫条件下,随氮养分的增加,茎生物量比增加、叶生物量比下降。2)重度遮荫降低了三裂叶蟛蜞菊叶片实际光化学效率(ФPSⅡ)和表观光合电子传递速率(ETR),对叶片PSⅡ反应中心有一定破坏作用;对最大光化学量子产量(Fv/Fm)的影响不显著(除0.2 g·...

In order to research the response of alien species Wedelia trilobata to shading condition and nitrogen nutrient and further to reveal the invasion, the effects of shade and nutrient levels on plant growth, biomass allocation patterns, and PSII functions of invasive W. trilobata were studied by using a series of greenhouse pot experiment. Two shading conditions and four nitrogen level were set up with relative light intensity of 42% (mild shade) and of 12% (heave shade), and with nitrogen level of 0, 0.1, 0.2, and 0.4 g·kg~(–1). The results sh...