结瘤固氮和氮肥对红桤木生理指标及生物量的影响

以红桤木扦插苗为研究材料，进行放线菌结瘤处理并喷施无氮Hoagland营养液（T1），以及不结瘤处理但喷施硝态氮Hoagland营养液（T2）、无氮Hoagland营养液（T3）和混合氮Hoagland营养液（T4）等试验，比较研究了结瘤处理和氮形态对红桤木生长和生理指标的影响。结果表明，放线菌结瘤处理对红桤木生长和生...

Effects of nodulation and nitrogen fertilizer on physiological characteristics and biomass of Alnus rubra

The cutting seedlings of Alnus rubra were treated by nodulation ＋ non-nitrogen Hoagland culture solution, non- nodulation ＋ nitrate-nitrogen Hoagland solution, non-nodulation ＋ non-nitrogen Hoagland solution, and non-nodulation ＋ mixed-nitrogen Hoagland solution respectively, to show the different effects between nodulation and non-nodulation, and be- tween nitrate- and mixed-nitrogen on physiological characteristics and biomass of Alnus rubra. The results indicated that nodulation markedly improved the growth and biomass,increased the chlorophyll content and adjusted the chlorophyll con- stituents. After nodulation,A, rubra maintained fairly high activities of nitrate reductase and glutamine synthetase, but the lowest activity of peroxide enzyme. Nitrogen forms also had remarkable effects on the physiological characteristics and bio- mass.