Received: 20-12-2022
Accepted: 04-08-2023
DOI:
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Effects of Nitrogen Fertilizers on Yield and Pharmaceutical Substances of Javanese Ginseng (Talinum paniculatumJacq.)
,
Nguyen Thu Ha
1
,
Ha Van Tu
1
,
Nguyen Phuong Mai
2
Keywords
Javanese ginseng, ni_trogen rate, nitrogen form, yield, medicinal substances
Abstract
The study aimed to evaluate the effects of different levels and forms of nitrogen fertilizer on the growth, yield and contents of pharmaceutical substances of Javanese ginseng. The experiment was laid out in a randomized complete block design with three levels of nitrogen (60, 75 and 90kg N/ha) and three ratios of N-NH4+:N-NO3-(0:100, 50:50 and 100:0) with three replications. The results showed that the height, number of leaves, leaf area, SPAD index, fresh weight of roots and dry matter of Javanese ginseng increased significantly with the increase of nitrogen rate. Different ratios of N-NH4+:N-NO3- did not significantly affect the growth and development parameters of Javanese ginseng. In both harvest seasons, the NH4+form at 75kg N/ha resulted in the highest yield and saponin and flavonoid content, while maintaining NO3-content at optimal range.
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