Effect of nitrogen on growth and total alkaloids of Sophora flavescens

Abstract

Abstract: The effect of nitrogen on growth, total alkaloids concentration and total alkaloids yield of Sophora flavescens was studied. Four levels of N (50, 100, 150, 200 mg/kg) were applied using urea (N 46%) in a pot experiment. The control was no N. Plant height, root diameter, root dry weight, aerial dry weight, Chl concentration and total alkaloids concentration increased relative to the amount of N applied. The root dry weight was 26.7 g/plant at 150 mg/kg N applied, an increase of 42% compared with the control. Root dry weight/root fresh weight and root dry weight/total plant dry weight decreased with amount of N applied. Nitrogen application had significant positive effect on root diameter. The root diameter was highest at 150 mg/kg N applied, an increase of 21.1% compared with the control. The percentage of xylem diameter increased with N applied while the percentage of root bark depth decreased. Chl concentration and total alkaloids concentration increased with N applied. Chl concentration was highest at 100 mg/kg N applied, an increase of 33.8% compared with the control. Total alkaloids concentration (4.4%) was also highest at 100 mg/kg N applied, an increase of 35.7% compared with the control. Total alkaloids concentration increased by improving Chl concentration. The total alkaloids yield per plant (1.18 g/plant) was highest at 150 mg/kg N applied, an increase of 90.5% compared with the control.

CLC Number:

JI Ying, ZHANG Qing-xia, LIN Hai-ming, CAI Wei. Effect of nitrogen on growth and total alkaloids of Sophora flavescens[J]. Acta Prataculturae Sinica, 2009, 18(3): 159-164.

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