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Response of Mungbean Root System Architecture to Phosphorus Application Methods

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Singh, V., Collins, M., Douglas, C. A. and Bell, M. (2019) Response of Mungbean Root System Architecture to Phosphorus Application Methods. Proceedings, 36 (1). p. 173. ISSN 2504-3900

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Article Link: https://doi.org/10.3390/proceedings2019036173


In recent years phosphorus application methods have become an important management strategy for optimising the uptake of the immobile nutrient phosphorus (P). Root system architecture (RSA) could play a particularly important role in the uptake of P by grain legumes, due to their relatively coarse root systems. The objective of this study was to understand the response of mungbean root systems to P application methods. Four mungbean varieties were grown in purpose-built soil filled root chambers that received five P application methods. Phosphorus treatments consisted of a control (no application of P) compared with 30 mg P/kg soil throughout the soil volume (high P treatment) or restricted to 10cm deep layers in the topsoil or in a layer from 20-30cm deep. A fifth treatment consisted of the same amount of P as applied in deeper dispersed layer applied in a concentrated band at 25cm depth. After 50 days of growth, plant were destructively harvested and shoot and root parameters were measured. Mungbean varieties responded differently to P application methods, with Jade and Berken varieties showing greater root proliferation at depth and greater shoot growth in response to banded and deeper dispersed P applications, relative to the late maturing variety Putland. Shallow dispersed P and the no-P control both resulted in poor root growth in all the genotypes except Celera II, which did not respond to P application from any placement strategy. Results suggest that P application strategies may need to vary with variety to maximize the uptake of P.

Item Type:Article
Business groups:Crop and Food Science
Keywords:phosphorus acquisition mungbean varieties root system architecture phosphorus application methods deep banding
Subjects:Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Agriculture > Agriculture (General) > Fertilisers
Plant culture > Seeds. Seed technology
Plant culture > Food crops
Plant culture > Vegetables
Live Archive:28 Jul 2020 06:00
Last Modified:02 Nov 2022 00:20

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