CAJ | 학술논문

用不同比例A1和C层棕色针叶林土混合（A1：C=1：1）制造土壤养分缺乏条件，系统研究了养分缺乏条件下，不同浓度外源有机酸对落叶松幼苗吸收P的影响及机理。结果如下：养分缺乏条件下，0.2-10.0mmol/L草酸与柠檬酸处理后苗木根系和叶片P的含量均有所增加。草酸处理后寒温带落叶松幼苗根系和叶片磷含量变化一致。兴安落叶松幼苗根系和叶片P含量大致随草酸浓度的增加而增加（r分别为0.67和0.78）。草酸浓度10.0mmol/L时落叶松幼苗根系和叶片P含量达峰值。柠檬酸处理后寒温带落叶松幼苗根系和叶片磷含量变化一致，大致随柠檬酸浓度的增加而增加（r 分别为0.69和0.78），且在5.0mmol/L时落叶松幼苗叶片P含量达峰值。柠檬酸处理后兴安落叶松幼苗根系P含量高于草酸处理后幼苗根系P含量，而柠檬酸和草酸处理后兴安落叶松幼苗叶片P含量差异不大。柠檬酸与草酸浓度0.2mmol/L均高于1mmol/L条件下兴安落叶松幼苗根系与叶片P含量。
용불동비례A1화C층종색침협림토혼합（A1：C=1：1）제조토양양분결핍조건，계통연구료양분결핍조건하，불동농도외원유궤산대락협송유묘흡수P적영향급궤리。결과여하：양분결핍조건하，0.2-10.0mmol/L초산여저몽산처리후묘목근계화협편P적함량균유소증가。초산처리후한온대락협송유묘근계화협편린함량변화일치。흥안락협송유묘근계화협편P함량대치수초산농도적증가이증가（r분별위0.67화0.78）。초산농도10.0mmol/L시락협송유묘근계화협편P함량체봉치。저몽산처리후한온대락협송유묘근계화협편린함량변화일치，대치수저몽산농도적증가이증가（r 분별위0.69화0.78），차재5.0mmol/L시락협송유묘협편P함량체봉치。저몽산처리후흥안락협송유묘근계P함량고우초산처리후유묘근계P함량，이저몽산화초산처리후흥안락협송유묘협편P함량차이불대。저몽산여초산농도0.2mmol/L균고우1mmol/L조건하흥안락협송유묘근계여협편P함량。
Different proportion of A1 and C horizons brown coniferous forest soils (A1:C=1:1) were conducted to set the soil nutrient deficient conditions, and the effects and mechanism of different concentrations of organic acids solution on phosphorus (P) absorption of Larix gmelinii seedlings with nutrient deficiency were studied. The results as follows:All P content of cold temperate Larix gmelinii seedlings rhizosphere and needles were increased after 0.2-10.0mmol/L oxalic acid and citric acid treatments. The change of P content in seedlings rhizosphere and needles was generally similar after oxalic acid treatment, and both rhizosphere and needles P content were increased with the rise of oxalic acid concentration (r value were 0.67 and 0.78, respectively). P content in Larix gmelinii seedlings rhizosphere and needles reached the peak when oxalic acid concentration was at 10.0mmol/L. P content in Larix gmelinii seedlings rhizosphere and needles were generally increased with the rise of citric acid concentration after citric acid treatment (r value were 0.69 and 0.78, respectively), and P content in Larix gmelinii seedlings rhizosphere and needles reached the peak when citric acid concentration was at 5.0mmol/L. The effect of citric acid treatment on P content in Larix gmelinii seedlings rhizosphere was better than oxalic acid, but there was no obvious variation in P content of Larix gmelinii seedlings after oxalic acid and citric acid treatments. P content of Larix gmelinii seedlings rhizosphere and needles at 0.2mmol/L citric acid and oxalic acid was more than that of 0.2mmol/L.