Smith, F.W. (1972) Potassium nutrition, ionic relations, and oxalic acid accumulation in three cultivars of Setaria sphacelata. Australian Journal of Agricultural Research, 23 (6). pp. 969-980.
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Abstract
In glasshouse trials, S. sphacelata cv. (a) Nandi, (b) Kazungula and (c) Narok were given all combinations of 50, 200 or 400 kg N + 0-360 kg K/ha. DM yields were highest in (c) and with 200 kg N/ha. The pattern of K response was similar for all cv. and for all rates of N; the optimum rate of K was about 120 kg/ha. Levels of Ca, Mg, Na and NH4 were higher in (b) and (c) when grown under limiting K conditions than when supplied with adequate K; Nandi was similarly affected, but did not accumulate Na. Plants with high contents of K also contained high levels of nitrate when N was in adequate supply. The cation-anion balance increased with increasing rate of K in all cv., but there was an interaction between rates of applied K and N. Increases in application rates of both K and N increased the oxalic acid concentration in the leaves of all cv.; the highest levels were in (b). The amount of oxalic acid accumulated was related to the cation-anion balance
| Item Type: | Article |
|---|---|
| Author Affiliation: | Division of Tropical Pastures, CSIRO, Cunningham Laboratory, St. Lucia, Queensland |
| Subjects: | Plant Protection Soil Science and Microbiology |
| Divisions: | General |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 23 May 2012 13:23 |
| Last Modified: | 23 May 2012 13:23 |
| Official URL: | http://dx.doi.org/10.1071/AR9720969 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/5664 |
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