摘要
以3～4年生盆栽芍药为试材，采用光合测定系统测定不同生长期供硅对芍药叶片SPAD值、净光舍速率、气孔导度、蒸腾速率以及水分利用效率等的影响。结果表明：随着硅肥施用量的增加，芍药叶片SPAD值、净光合速率、气孔导度以及水分利用效率在不同生长期均表现出增加的趋势，施硅量为60mg／kg干基质时达到最大值；蒸腾速率则呈逐渐降低的趋势，当施硅量为60mg／kg干基质时达到最小值。施硅量达80mg／kg干基质时，芍药叶片光合特性及水分利用效率仍优于对照，并未对芍药生长造成严重影响。
A pot culture experiment using photosynthesis test system was conducted to study the effect of different levels of silicon（Si） supply on the photosynthetic properties and water utilization efficiency in different periods of Paeonia lactiflora Pall.. The results showed that no matter what period, the SPAD value, net photosynthesis rate, stomatal conductance and water utilization efficiency of the Paeonia lactiflora Pall. leaves increased firstly, and reached the highest at the level of 60 mg/kg dry matrix, where on the contrary, the transpiration rate changed oppositely. The photosynthetic properties and water utilization efficiency were still better than CK when at the level of 80 mg/kg dry matrix, and no seriously affected were occurred on Paeonia lactiflora Pall. plants.
出处
《北方园艺》
CAS
北大核心
2015年第8期81-85,共5页
Northern Horticulture
基金
江苏农牧科技职业技术学院人才引进基金资助项目(NSFRC1305)
江苏省林业三新工程资助项目(LYSX[2014]13)
关键词
硅
芍药
光合特性
水分利用效率
silicon
Paeonia lactiflora Pall.
photosynthetic properties
water utilization efficiency
