施肥对油松生长及针叶光合速率的影响

Effect of Fertilization on the Growth and Needle Photosynthetic Rate of Pinus Tabulaeformis

为探究不同施肥方案对油松生长及针叶光合速率的影响,以甘肃省子午岭林业管理局正宁分局刘家店林场为试验点,以尿素和有机肥为肥料,对不同施肥方式下油松生长状况及针叶的色素含量和净光合速率2个方面进行评估,比较不同施肥方案对油松生长及其针叶色素含量和净光合速率的影响。结果表明:处理组C(有机肥,200 g/株)油松生长状况及其针叶的色素含量和净光合速率较好,其株高、胸径、根部生物量、茎部生物量、叶部生物量和整株生物量分别为:143.17 cm、4.26 cm、158.26 g/株、169.65 g/株、89.49 g/株和669.65 g/株;油松针叶的叶绿素a、叶绿素b、类胡萝卜素、总叶绿素含量和净光合速率分别为:0.89、0.27、0.11、1.35 mg/(g·FW)和10.03μmol/(m^(2)·s)。研究可为油松的科学施肥方式提供参考。

Objective:To investigate the effects of different fertilization schemes on the growth and needle photosynthetic rate of Pinus tabulaeformis.Method:This study used Liujiadian Forest Farm of Zhengning Branch of Ziwuling Forestry Management Bureau in Gansu Province as the experimental site,and used urea and organic fertilizer as fertilizers to evaluate the growth status of Pinus tabulaeformis under different fertilization methods,as well as the pigment content and net photosynthetic rate of its needles.The effects of different fertilization schemes on the growth of Pinus tabulaeformis and the pigment content and net photosynthetic rate of its needles were compared.Conclusion:The growth status,pigment content,and net photosynthetic rate of Pinus tabulaeformis in treatment group C(organic fertilizer,200 g/plant)were good.The plant height,diameter at breast height,root biomass,stem biomass,leaf biomass,and whole plant biomass were 143.17 cm,4.26 cm,158.26 g/plant,169.65 g/plant,89.49 g/plant,and 669.65 g/plant,respectively;The chlorophyll a,chlorophyll b,carotenoids,total chlorophyll content,and net photosynthetic rate of Pinus tabulaeformis needles are 0.89,0.27,0.11,1.35 mg/(g·FW),and 10.03μmol/(m^(2)·s),respectively.This study provides a theoretical basis for the scientific fertilization method of Pinus tabulaeformis.