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Type: Journal article
Title: Dry matter production and uptake of zinc and phosphorus in two oilseed rape genotypes under differential rates of zinc and phosphorus supply
Author: Lu, Zhonggui Lu
Grewal, Harsharn Singh
Graham, Robin David
Citation: Journal of Plant Nutrition. 21(1):25-38
Issue Date: 1998
ISSN: 0190-4167
Statement of
Zhonggui Lu, Harsharn Singh Grewal & Robin D. Graham
Abstract: The effects of varied supply of zinc (Zn) (0, 0.1, 0.2, 1.0, and 10 mg Zn kg⁻¹ soil) and phosphorus (P) (low P: 50 mg P kg⁻¹ soil and high P: 150 mg P kg⁻¹ soil) on vegetative growth, plant tissue Zn and P concentration and their uptake were studied in six weeks old plants of two oilseed rape (Brassica napus) genotypes (92–13, a traditional genotype from China high in both erucic acid and glucosinolate, and Xinza‐2, a hybrid from China low in erucic acid and glucosinolate) grown in Laffer sand (low in Zn and P) under controlled environmental conditions. Two oilseed rape genotypes had a differential response to Zn application. Xinxa 2 responded significantly for shoot and root dry matter only up to 0.1 mg applied Zn kg⁻¹ soil, while 92–13 responded up to 0.2 mg Zn kg⁻¹ soil. Zinc at 10 mg kg⁻¹ soil slightly reduced shoot dry matter and drastically reduced root dry matter of both the genotypes. Shoot and root dry matter production at 0, 0.1, 0.2, and 1 mg Zn kg⁻¹ soil were significantly greater under high P supply compared with low P supply. High P supply did not accentuate Zn deficiency symptoms compared with low P supply even at nil Zn. Phosphorus concentration in plant parts was significantly higher at nil Zn compared with Zn application. An increase in P supply had a non‐significant effect on Zn concentration, but significantly increased the P concentration and P uptake in shoots. The results suggest that an increased supply of P at lower rates of Zn application was not detrimental for early vegetative growth and Zn uptake of two oilseed rape genotypes.
Rights: Copyright © 1998 by Marcel Dekker, Inc.
DOI: 10.1080/01904169809365380
Appears in Collections:Agriculture, Food and Wine publications

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