论文部分内容阅读
目的:分析不同氮素形态及不同浓度氮素施肥对大青叶生物量与生物碱类成分的影响,为研究提高菘蓝对氮素的利用效率提供理论依据。方法:采用大棚砂培种植菘蓝,正交设计L25(56),以大青叶的生物量及靛蓝、靛玉红含量为指标,分析3因素硝态氮(N03--N)、铵态氮(NH4+-N)和酰胺态氮[CO(NH2)2]和5种不同氮素浓度对菘蓝的影响。结果:不同的氮素形态和浓度对大青叶生物量与生物碱类成分含量的影响存在较大差异,酰胺态氮对大青叶生物量的影响最大,铵态氮对靛玉红影响更大;综合考虑其生物量与生物碱成分含量,优选出1个最佳的施氮组合,即17号组合(NH4)2SO4浓度为7.5mmol·L-1,KNO3浓度为2.5 mmol·L-1,CO(NH2)2浓度为5 mmol·L-1。结论:菘蓝前期以促生长为主,经济有效的平衡施氮组合能合理促进菘蓝植株生长,提高大青叶的活性成分的含量和单株生物量。
OBJECTIVE: To analyze the effects of different nitrogen forms and nitrogen fertilization on the biomass and alkaloids of Folium Isatidis, and to provide a theoretical basis for the study on improving the utilization efficiency of Nitraria species. Methods: Soybean was cultivated in a greenhouse and crossed with L25 (56) for orthogonal design. The biomass of three leaves and the contents of indigo and indirubin were used as indices to analyze the effects of three factors (nitrate nitrogen (N03 - N) Effects of Nitrogen (NH4 + -N) and Amide Nitrogen [CO (NH2) 2] and Five Different Nitrogen Concentrations on. Results: The effects of different nitrogen forms and concentrations on the contents of biomass and alkaloids in the leaves were quite different. Amide nitrogen had the greatest effect on the biomass of Folium Isatidis, and the effect of ammonium nitrogen on indirubin was more significant Considering the contents of biomass and alkaloids, 1 optimal combination of nitrogen application was selected, that is, 7.5 mmol·L-1 of 2SO4 and 7.5 mmol·L-1 of KNO3 , CO (NH2) 2 concentration of 5 mmol·L-1. CONCLUSION: The main content of A. tuber is growth-promoting in the early stage, and the economic and effective balanced nitrogen application can promote the growth of A. purpurea plant and increase the content of active ingredients and the biomass per plant.