Palis, R.K. and Norcio, N.V. (1974) Net carbon exchange, nitrate reductase and total available carbohydrates of two sorghum varieties at three nitrogen levels. Philippine Agriculturist, 58 (5-6). pp. 181-191.
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Abstract
The relationship between total available carbohydrate content, N metabolism and photosynthesis was examined in plants of sorghum cv. Cosor 1 and Cosor 2 given 0, 45 or 90 kg N + 60 kg P2O5 + 60 kg K2O/ha. In the 2nd leaf from the panicle in both cultivars, net C exchange and nitrate reductase activity increased whereas the total available carbohydrate content decreased with increasing rates of applied N. Specific leaf weight and leaf nitrate reductase activity were significantly correlated with net C exchange, but there was an inverse relationship between the total available carbohydrate content and nitrate reductase activity of the leaf. At maturity, the head accounted for 50-75% of the total plant DM. Total available carbohydrates were lowest in the leaves and stems since most of the carbohydrate had been translocated to the head. The 2 cultivars differed in their ability to accumulate carbohydrates in the roots depending on the rate of applied N. It was suggested that the total available carbohydrate content of the roots would influence tillering and could therefore give an indication of regrowth ability and ratooning capacity of particular cultivars
| Item Type: | Article |
|---|---|
| Author Affiliation: | Department . of Agronomy, College of Agriculture, Philippines University, College, Laguna |
| Subjects: | Plant Physiology and Biochemistry > Plant Physiology Plant Physiology and Biochemistry > Biochemistry |
| Divisions: | Sorghum |
| Depositing User: | Ms K Syamalamba |
| Date Deposited: | 04 Sep 2012 09:29 |
| Last Modified: | 04 Sep 2012 09:30 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/7703 |
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