3种氨基酸对火炬松苗期生长的影响

Effects of Three Kinds of Amino Acids on the Seedling of Pinus taeda

分析1 a生火炬松(Pinus taeda)幼苗施复合肥前后氨基酸含量变化,筛选出含量变化较大的3种氨基酸,设置3种氨基酸不同浓度组合,采用土壤施肥和叶面喷施,通过方差分析及Duncan多重比较检验,筛选出合适火炬松的氨基酸浓度组合和施肥方法。结果表明:(1)施用复合肥前后氨基酸含量变化较大的有9种,其中缬氨酸、组氨酸、天冬酰胺含量较大,且均为水溶性氨基酸;(2)总整体来看,芭田复合肥对苗木的生长促进效果不如氨基酸施肥;(3)采用土壤施肥,缬氨酸0.192 g/L+组氨酸0.163 g/L+天冬酰胺0.309 g/L对苗高和生物量的促进效果最好;采用叶面喷施,缬氨酸0.256 g/L+组氨酸0.163 g/L+天冬酰胺0.412 g/L对苗高和生物量的促进效果最好;(4)在5项生长量指标测定中,叶面喷施的指标值大部分高于土壤施肥。综上所述,对火炬松幼苗生长促进效果最优的施肥方式为叶面喷施缬氨酸0.256 g/L+组氨酸0.163 g/L+天冬酰胺0.412 g/L。

Through the annual loblolly pine（Pinus taeda） seedlings compound fertilizer applied to the analysis of amino acid content, screening of three amino acids with a large change in content. Setting different combinations of amino acid concentrations, and sprayed with two different methods of soil and foliar fertilization for processing. By ANOVA and Duncan＇s multiple comparison test of different fertilization methods, differences in the concentration of amino acid composition of seedling growth, and select the best combination of amino acid concentration and fertilization. The results showed that：（1） There were nine kinds of amino acids had a great change in content, which meet the test requirements to select three amino acids including valine, histidine and asparagine;（2） Overall, amino acid fertilizer was better than compound fertilizer for seedlings;（3） In terms of soil fertilization, the optimal combination was valine 0.192 g/L ＋ histidine 0.163 g/L ＋ asparagine 0.309 g/L, in terms of foliar fertilization, the best combination was valine 0.256 g/L ＋ histidine 0.163 g/L ＋ asparagine 0.412 g/L for the effect of promoting the height and biomass;（4） Between the optimal combinations of biological indicators, foliar fertilization are better than soil fertilization. In summary, the optimal combination of loblolly pine seedling growth-promoting effect was valine 0.256 g/L ＋ histidine 0.163 g/L ＋ asparagine 0.412 g/L combination, spraying foliar application.