配方施肥对刨花润楠幼苗生长和光合生理的影响  

Effects of Formulated Fertilization on the Growth and Photosynthetic Physiological Properties of Machilus pauhoi Seedlings

作　　者：胡厚臻 侯文娟[1] 潘启龙[1,2] 周袁慧子 王艺锦[1] 王凌晖[1] 滕维超[1] 

机构地区：[1]广西大学林学院,广西南宁530005 [2]中国林科院热带林业实验中心,广西凭祥532600

出　　处：《西北林学院学报》2015年第6期39-45,共7页Journal of Northwest Forestry University

基　　金：广西林业科技"十二五"项目(桂林科字[2012]第27号)

摘　　要：采用正交试验设计,研究不同配比施肥对刨花润楠幼苗生长和光合生理的影响。对生长及光合生理指标测定表明,不同处理的刨花润楠的地径生长量比对照（CK）提高9.14%-123.60%;株高生长量比CK提高10.14%-86.12%;生物量比CK提高0.85%-74.87%。对刨花润楠光合指标影响是叶绿素总含量比CK增加12.58%-67.65%;净光合速率（Pn）值比CK提高6.0%-294.33%;蒸腾速率（Tr）值比CK提高27.80%-280.51%;气孔导度（Gs）值比CK提高0-300.00%;施肥对胞间CO2浓度（Ci）值的影响呈现一定的波动,CK的胞间CO2浓度（Ci）值最高。氮肥是影响株高、生物量生长、总叶绿素含量以及光合生理指标的重要因子,钾肥是影响地径生长的重要因子。综合评价表明,施肥量为N：240mg·株^-1、P：36mg·株^-1、K：162mg·株^-1（按纯N、P、K含量计算）对刨花润楠的生长和生理指标的促进作用最显著。The fertilization experiment was carried out by using an L9 （34） orthogonal design and regression analysis to examine the effects of different combined fertilization of nitrogen （N）, phosphorus （P） and po- tassium （K） on the growth and physiological of the Machilus pauhoi seedlings. The results showed that the ground diameter, height growth, biomass of the potted seedlings increased by 9. 14%- 123. 60%, 10.14%-86.12%, and 0.85%-74.87%, respectively than those of the control. The total chlorophyll content, net photosynthetic rate （Pn）, transpiration rate （Tr）, and stomatal conductance （Gs） increased by 12.58%-67.65%, 6.00%-294.33%, 27.80%-280.51% and 0-300.00% than the control. Inter- cellular CO2 concentration （Ci） presented some fluctuation. Maximum value of Ci was found in the control seedlings. Analysis showed that the growth indices of height, biomass, total chlorophyll content and the photosynthetic physiological indices were decided by the content of nitrogen, and the ground diameter was decided by the content of potassium. The comprehensive evaluation showed that the fertilization treatment No. 2 （N1P2K2） could significantly promote the growth and photosynthetic physiological indices of M. pauhoi, and recommended application rates of N, P and K were 240, 36 mg·plant^-1 and 162 mg·plant^-1 , respectively.

关 键 词：刨花润楠 氮磷钾配比 光合生理 施肥 

分 类 号：S725.5[农业科学—林木遗传育种]