Effects of phosphorus and iron on biomass production and nutrients partitioning in soybean cultivars under water stress condition
Institute of Genetics, Physiology and Plant Protection, 20 Padurii str., MD 2002, Chisinau, Republic of Moldova.
Research Article
World Journal of Advanced Research and Reviews, 2021, 12(03), 414–422
Article DOI: 10.30574/wjarr.2021.12.3.0686
Publication history:
Received on 07 November 2021; revised on 20 December 2021; accepted on 22 December 2021
Abstract:
A pot experiment was conducted to investigate the effects of P and Fe application on the biomass production and nutrients partitioning of two soybeans (Glycine max. L. Merr) cultivars grown in carbonated chernoziom (low in Fe and P) under water stress conditions. P and Fe were applied at two levels (0 and 100 mg P kg-1 soil; 0 and 5 mg Fe kg-1 soil). Control plants were grown at 70% water holding capacity (WHC) while their counterparts were subjected to 35% WHC water stress at initial flowering stage for two weeks. Considerable variability was observed in leaves, roots dry mass accumulation and nodulation among the soybean cultivars (Zodiac, Licurici) at both P and Fe levels in relation to water regimes. The results showed that drought significantly reduced biomass production irrespective of nutrient supply and its adverse effect was more pronounced at low nutrient supply. Leaf development and nodules growth were the most sensitive to water deficit and insufficient nutrient supply. Adequate P and Fe supply increased dry matter production and nutrient concentrations for soybean cultivars. Phosphorus concentration in plant parts was significantly higher at nil Fe compared with Fe application. Phosphorus application decreased Fe allocation to the leaves. The experimental results demonstrated that there was a positive effect of P and Fe adequate nutrition on P use efficiency. Hence, the sufficient phosphorus and iron supply maintained growth at high level, improved P and Fe status and partially alleviated drought effect on soybean plants.
Keywords:
Biomass; Phosphorus; Iron; Phosphorus use efficiency; Soybean; Water stress
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