The annual dynamic changes of nutrient content in soil and leaves of adult Areca catechu trees in the A.catechu producing area Tunchang were studied by fixed point observation method to provide the scientific basis fo...The annual dynamic changes of nutrient content in soil and leaves of adult Areca catechu trees in the A.catechu producing area Tunchang were studied by fixed point observation method to provide the scientific basis for the rational fertilization of A.catechu.The results showed that the soil of the A.catechu plantation was weakly acidic on the whole,and soil pH was 5.53.Soil phosphorus content was extremely low,only 5.46 mg/kg.Nitrogen content in A.catechu leaves was the highest( up to 20.24 g/kg),while phosphorus content was the lowest( only 0.31 g/kg).The differences in nutrient content were related to the characteristics of nutrient demand.There was a difference in nutrient content of A.catechu leaves during the annual growth period.Because the maximum nutrient requirement period of A.catechu trees was from April to September,the important fertilization period of A.catechu trees was also from April to September.展开更多
目的基于实时直接分析-四极杆飞行时间质谱法(direct analysis in real time-quadrupole time-of-flight mass spectrometry,DART-QTOF-MS)结合非靶向代谢组学,快速分析青果槟榔与烟果槟榔代谢物差异。方法通过单因素实验,考察影响DART...目的基于实时直接分析-四极杆飞行时间质谱法(direct analysis in real time-quadrupole time-of-flight mass spectrometry,DART-QTOF-MS)结合非靶向代谢组学,快速分析青果槟榔与烟果槟榔代谢物差异。方法通过单因素实验,考察影响DART离子源电离效率的关键因素;结合QTOF-MS以TOFMS和信息依赖采集模式分别在正离子和负离子模式下获得质谱数据,采用多元统计学软件建立无监督和有监督的判别模型并筛选差异化合物。采用MarkerView 1.3.1、PeakView软件及在线数据库对差异化合物进行初步鉴定。结果在正负两种扫描模式下,DART离子源的最佳工作条件为:离子化温度500℃、样品传输速度0.2 mm/s。在此条件下发现两种食用槟榔化学成分存在差异,获得了25种差异化合物;烟果槟榔中有20种化合物的相对含量高于青果槟榔,有5种化合物的相对含量低于青果槟榔。结论本研究采用实时直接分析质谱技术,具有操作方便、分析速度快、准确度高和稳定性好的优点。同时,该研究从代谢组学角度初步揭示了青果槟榔与烟果槟榔代谢物的差异性,可为食用槟榔的加工工艺研究及品质提升提供参考依据。展开更多
基金Supported by National Nonprofit Institute Research Grant of CATAS-TCGRI(1630032016015)Natural Science Foundation of Hainan Province(317264)
文摘The annual dynamic changes of nutrient content in soil and leaves of adult Areca catechu trees in the A.catechu producing area Tunchang were studied by fixed point observation method to provide the scientific basis for the rational fertilization of A.catechu.The results showed that the soil of the A.catechu plantation was weakly acidic on the whole,and soil pH was 5.53.Soil phosphorus content was extremely low,only 5.46 mg/kg.Nitrogen content in A.catechu leaves was the highest( up to 20.24 g/kg),while phosphorus content was the lowest( only 0.31 g/kg).The differences in nutrient content were related to the characteristics of nutrient demand.There was a difference in nutrient content of A.catechu leaves during the annual growth period.Because the maximum nutrient requirement period of A.catechu trees was from April to September,the important fertilization period of A.catechu trees was also from April to September.
文摘目的基于实时直接分析-四极杆飞行时间质谱法(direct analysis in real time-quadrupole time-of-flight mass spectrometry,DART-QTOF-MS)结合非靶向代谢组学,快速分析青果槟榔与烟果槟榔代谢物差异。方法通过单因素实验,考察影响DART离子源电离效率的关键因素;结合QTOF-MS以TOFMS和信息依赖采集模式分别在正离子和负离子模式下获得质谱数据,采用多元统计学软件建立无监督和有监督的判别模型并筛选差异化合物。采用MarkerView 1.3.1、PeakView软件及在线数据库对差异化合物进行初步鉴定。结果在正负两种扫描模式下,DART离子源的最佳工作条件为:离子化温度500℃、样品传输速度0.2 mm/s。在此条件下发现两种食用槟榔化学成分存在差异,获得了25种差异化合物;烟果槟榔中有20种化合物的相对含量高于青果槟榔,有5种化合物的相对含量低于青果槟榔。结论本研究采用实时直接分析质谱技术,具有操作方便、分析速度快、准确度高和稳定性好的优点。同时,该研究从代谢组学角度初步揭示了青果槟榔与烟果槟榔代谢物的差异性,可为食用槟榔的加工工艺研究及品质提升提供参考依据。
