早春施肥对油松生长与针叶色素含量、净光合速率的影响

为了研究施肥对油松幼苗生长、色素含量以及净光合速率的影响,在田间条件下,设置4个施肥处理,即FH1～FH4,氮肥用量分别是15、30、45、60kg/hm2,磷肥用量分别是30、30、50、50kg/hm2,钾肥用量分别是40、60、60、40kg/hm2,1个对照,3次重复。结果表明:油松幼苗高度随施氮量增加而增加,FH2～FH4之间无显著差异,显著高于对照;FH3和FH4的根茎叶、总干物质积累量之间无显著差异,显著高于对照,除根系外,FH1、FH2以及对照之间无显著差异;所有施肥处理叶绿素a含量无显著差异,显著高于对照;FH2～FH4的叶绿素b含量均无显著差异,显著高于对照;FH3和FH4的类胡萝卜素含量之间无显著差异,显著低于对照;总叶绿素含量所有施肥处理之间无显著差异;FH3与FH4的净光合速率之间无显著差异,显著高于其他处理和对照。综合分析认为,FH3处理为最佳的施肥配比,FH4与FH2次之,生产中应用FH3处理较好。

Effects of Fertilizer Application in Early Spring on Growth, Pigment Content and Photosynthetic Rate of Pinus tabulaeformis Carr

In order to study the growth, pigment content and photosynthetic rate of Pinus tabulaeformis Carr. under fertilizer application in early spring, a field trial with four fertilizer treatments were conducted in 2011 in Taiyuan, Shanxi, China. The designed four treatments ( FH1-FH4) were FH1, FH2, FH3 and FH4 (N 15 P 30 K 40 , N3P 30 K 60 , N 45 P 50 K 60 andN 60 P 50 K 40 kg/hm 2 ). It was found that the seedling height of Pinus tabulaeformis increased with the amount of nitrogen, the treatments FH2, FH3 and ...