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Effect of phosphorus sources on phosphorus and nitrogen utilization by three sweet potato cultivars

Abstract

A greenhouse experiment was conducted at the FAO/IAEA Agriculture and Biotechnology Laboratory in Seibersdorf, Austria using three sweet potato cultivars, TIS 2, TIS 3053 and TIS 1487. The three sweet potato cultivars were grown at two levels of phosphorus (0 kg P/kg soil and 60 kg P/kg soil). The fertilizer treatments consisted of two sources of phosphorus, Gafza rock Phosphate and triple super phosphate with 14.19 and 19.76% total phosphorus, respectively. {sup 15}N labelled urea was used to study the nitrogen recovery in tubers from the applied nitrogen fertilizer. The results from these preliminary studies indicate that there is considerable genotypic variation among cultivars in the efficiency with which phosphorus and nitrogen are taken up and used to produce biomass. Their response to different sources of phosphorus are also variable. TIS-2 and TIS-1487 have a greater ability to absorb phosphorus from Gafza rock phosphate and produce higher tube yields indicating their greater potential for using alternative sources of natural phosphate fertilizers more effectively. Gafza rock phosphate also increased accumulation of nitrogen in TIS-1487, a characteristic which will place this cultivar at an advantage when growing in soils low in nitrogen. On an overall basis taking into account tuber yield, phosphorus  More>>
Authors:
Montanez, A; Zapata, F; [1]  Kumarasinghe, K S [2] 
  1. FAO/IAEA Agriculture and Biotechnology Lab., Seibersdorf (Austria). Soils Science Unit
  2. Joint FAO/IAEA Div. of Nuclear Techniques in Food and Agriculture, Vienna (Austria). Soil Fertility, Irrigation and Crop Production Section
Publication Date:
Jul 01, 1996
Product Type:
Technical Report
Report Number:
IAEA-TECDOC-889
Reference Number:
SCA: 553002; PA: AIX-28:017743; EDB-97:029609; SN: 97001735671
Resource Relation:
Other Information: PBD: Jul 1996; Related Information: Is Part Of Isotope studies on plant productivity. Results of a co-ordinated research programme; PB: 213 p.
Subject:
55 BIOLOGY AND MEDICINE, BASIC STUDIES; NITROGEN; UPTAKE; PHOSPHORUS; POTATOES; PRODUCTIVITY; SPECIES DIVERSITY; AGRICULTURE; BIOLOGICAL STRESS; EXPERIMENTAL DATA; GENOTYPE; NITROGEN 15; PHOSPHATES; SOILS; TOLERANCE; TRACER TECHNIQUES; WATER REQUIREMENTS
OSTI ID:
429913
Research Organizations:
Joint FAO/IAEA Div. of Nuclear Techniques in Food and Agriculture, Vienna (Austria). Soil Fertility, Irrigation and Crop Production Section
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 1011-4289; Other: ON: DE97614129; TRN: XA9642770017743
Availability:
INIS; OSTI as DE97614129
Submitting Site:
INIS
Size:
pp. 147-154
Announcement Date:

Citation Formats

Montanez, A, Zapata, F, and Kumarasinghe, K S. Effect of phosphorus sources on phosphorus and nitrogen utilization by three sweet potato cultivars. IAEA: N. p., 1996. Web.
Montanez, A, Zapata, F, & Kumarasinghe, K S. Effect of phosphorus sources on phosphorus and nitrogen utilization by three sweet potato cultivars. IAEA.
Montanez, A, Zapata, F, and Kumarasinghe, K S. 1996. "Effect of phosphorus sources on phosphorus and nitrogen utilization by three sweet potato cultivars." IAEA.
@misc{etde_429913,
title = {Effect of phosphorus sources on phosphorus and nitrogen utilization by three sweet potato cultivars}
author = {Montanez, A, Zapata, F, and Kumarasinghe, K S}
abstractNote = {A greenhouse experiment was conducted at the FAO/IAEA Agriculture and Biotechnology Laboratory in Seibersdorf, Austria using three sweet potato cultivars, TIS 2, TIS 3053 and TIS 1487. The three sweet potato cultivars were grown at two levels of phosphorus (0 kg P/kg soil and 60 kg P/kg soil). The fertilizer treatments consisted of two sources of phosphorus, Gafza rock Phosphate and triple super phosphate with 14.19 and 19.76% total phosphorus, respectively. {sup 15}N labelled urea was used to study the nitrogen recovery in tubers from the applied nitrogen fertilizer. The results from these preliminary studies indicate that there is considerable genotypic variation among cultivars in the efficiency with which phosphorus and nitrogen are taken up and used to produce biomass. Their response to different sources of phosphorus are also variable. TIS-2 and TIS-1487 have a greater ability to absorb phosphorus from Gafza rock phosphate and produce higher tube yields indicating their greater potential for using alternative sources of natural phosphate fertilizers more effectively. Gafza rock phosphate also increased accumulation of nitrogen in TIS-1487, a characteristic which will place this cultivar at an advantage when growing in soils low in nitrogen. On an overall basis taking into account tuber yield, phosphorus use efficiency, and nitrogen use efficiency, TIS-2 may be considered the better candidate for introduction into soils poor in resources particularly phosphorus. This study was conducted with a limited number of cultivars due to limitation in the availability of germplasma. In spite of this, the differences in their abilities for phosphorus and nitrogen uptake and use are clearly visible which justifies large scale screening experiments using a broader germplasm base, in the future. (author). 14 refs, 1 fig., 3 tabs.}
place = {IAEA}
year = {1996}
month = {Jul}
}