Effect of NH4(+) -N/NO3(-)-N ratio in applied supplementary fertilizer on nitrogen metabolism and main chemical composition of Pinellia ternata / 中国中药杂志
China Journal of Chinese Materia Medica
; (24): 2073-2077, 2013.
Article
in Chinese
| WPRIM (Western Pacific)
| ID: wpr-346440
Responsible library:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To study the effect of nitrogen forms on nitrogen metabolism and main chemical composition of Pinellia ternate.</p><p><b>METHOD</b>Through the soilless cultivation experiment and based at the same nitrogen level and different NH4(+) -N/NO3(-) -N ratios, nitrate reductase (NR) activity, glutamine synthetase (GS) activity, the content of nitrate nitrogen and ammonium nitrogen in different parts of P. ternate were determined. The contents of total alkaloid, free total organic acids and guanosine in the tuber were determined. The yield of bulbil and tuber was calculated.</p><p><b>RESULT</b>The test results showed that, with the NH4(+) -N/NO3(-) -N ratio increasing, the activity of nitrate reductase decreased, the content of nitrate nitrogen in the leaves, petioles and tuber increasing initially, then decreased, and the content of nitrate nitrogen in the root decreased. Meanwhile, with the NH4(+) -N/NO3(-) -N ratio increasing, the activity of glutamine synthetase in the leaves, petioles and root increased, the activity of glutamine synthetase in the tuber increasing initially, then decreased. The contents of ammonium nitrogen in the leaves, tuber and root increased initially, then decreased, and the contents of ammonium nitrogen in the petioles increased with the NH4(+)(-N/NO3(-)-N ratio increasing. The yield of bulbil and tuber were the highest at the NH4(+)-N/NO3(-) -N ratio of 75 25. The content of total alkaloid and guanosine in the tuber were the highest at the NH4(+)-N/NO3(-) -N ratio of 0 100, and the contents were 0.245% and 0.0197% respectively. With the NH4(+)-N/NO3(-) -N ratio of 50 50, the content of free total organic acids was the highest, it reached 0.7%, however, the content of free total organic acids was the lowest at the NH4(+) -N/NO3(-) -N ratio of 0 100.</p><p><b>CONCLUSION</b>Nitrogen fertilization significant influences the nitrogen metabolism, the yield and main chemical composition of P. ternate.</p>
Full text:
Available
Database:
WPRIM (Western Pacific)
Main subject:
Chemistry
/
Pinellia
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Fertilizers
/
Quaternary Ammonium Compounds
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Metabolism
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Nitrates
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Nitrogen
Language:
Chinese
Journal:
China Journal of Chinese Materia Medica
Year:
2013
Document type:
Article