施用光合菌对4种油茶品种生长及养分含量的影响

Effects of Application of Photosynthetic Bacteria and Fertilizer on Growth and Nutrient Content in Camellia vietnamensis

为给油茶的施肥管理提供科学依据,比较研究施用2种不同浓度的光合菌对不同品种油茶(‘海油1号’‘海油2号’‘海油3号’‘海油4号’)的生长、光合作用和叶片养分含量变化的影响。结果表明,除‘海油1号’外,其他油茶品种的苗高净生长量以光合菌稀释30倍最高;‘海油3号’的苗高和地径净生长量高于其他油茶品种。4个油茶品种的瞬时净光合速率随着光合菌浓度的增大呈先上升后下降趋势,也以光合菌稀释30倍最高;但4个油茶品种瞬时蒸腾速率在不同处理组间的变化存在差异。‘海油1号’‘海油2号’和‘海油4号’叶片N、K含量均随着光合菌浓度的增大呈上升趋势,而P含量则随着光合菌浓度的增大呈先上升后下降的趋势。相关性分析结果显示,苗高与瞬时净光合速率、瞬时蒸腾速率呈极显著相关,与叶片TP含量显著相关;叶片TN含量与TK含量极显著相关。可见,施用光合菌能促进油茶的生长和提高光合作用及叶片元素含量,其通过影响叶片三要素含量和光合作用而影响苗木生长。

In order to provide scientific basis for fertilization and management of Camellia vietnamensis,the growth,photosynthesis and nutrient content effect of photosynthetic bacteria(PB)of two concentrations on Camellia vietnamensis(C.vietnamensis vs.‘Haiyou 1’,‘Haiyou 2’,‘Haiyou 3’and‘Haiyou 4’)were studied.The net growth of most cultivars was the highest,except‘Haiyou1’,with the dilution 30 times.The height and diameter growth of‘Haiyou 3’was higher than that of other varieties.The instantaneous net photosynthetic rate of the four varieties showed a trend of increase first then decrease under increasing the concentration of PB,and the performance of dilution 30 times was better than that of dilution 60 times.However,there were differences in the instantaneous transpiration rate of the four varieties under different treatment.The content of N and K in the leaves of‘Haiyou 1’,‘Haiyou 2’and‘Haiyou 4’showed an upward trend,and the content of P showed a trend of increase first then decrease under increasing the concentration of PB,respectively.The correlation analysis results showed that the height was extremely significantly related to the instantaneous net photosynthetic rate and the instantaneous transpiration rate,and was significantly related to the P content.The N content was extremely significantly related to the K content.It indicates that PB could significantly promote the seedling growth and increase photosynthesis,leaf element content on C.vietnamensis.