Interactive Effects of N-, P- and K-Nutrition and Drought Stress on the Development of Maize Seedlings

Studer, Christoph; Hu, Yuncai; Schmidhalter, Urs (2017). Interactive Effects of N-, P- and K-Nutrition and Drought Stress on the Development of Maize Seedlings Agriculture, 7(11), p. 90. MDPI 10.3390/agriculture7110090

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Global climate change is likely to increase the risk of frequent drought. Maize, as the principal global cereal, is particularly impacted by drought. Nutrient supply may improve plant drought tolerance for better plant establishment during seedling growth stages. Thus, this study investigated the interactive effects of drought and the application of the nutrients N, P and K either individually or in combination. The maize seedlings were harvested between 12 and 20 days after sowing, and the leaf area, shoot fresh and dry weight and root dry weight were determined, and shoot water content and root/shoot dry weight ratio were calculated. Among the N, P and K fertilization treatments applied individually or in combination, the results showed that there was generally a positive effect of combined NPK and/or NP nutrient supply on shoot growth such as leaf area, shoot fresh and dry weight at day 20 after sowing under both well-watered and drought conditions compared with no nutrient supply. Compared with the effect of N and P nutrient supply, it seems that K was not limiting to plant growth due to the mineralogical characteristics of the illitic-chloritic silt loam used, which provided sufficient K, even though soil tests showed a low K nutrient status. Interestingly, the root/shoot ratio remained high and constant under drought regardless of NPK application, while it decreased with NPK applications in the well-watered treatment. This suggests that the higher root/shoot ratios with N, NP, PK and NPK under drought could be exploited as a strategy for stress tolerance in crop plants.

Item Type:

Journal Article (Original Article)

Division/Institute:

School of Agricultural, Forest and Food Sciences > Abteilung Agronomie

Name:

Studer, Christoph; Hu, Yuncai and Schmidhalter, Urs

Subjects:

S Agriculture > SB Plant culture

ISSN:

2077-0472

Publisher:

MDPI

Language:

English

Submitter:

Simon Lutz

Date Deposited:

04 Oct 2019 12:08

Last Modified:

04 Oct 2019 12:08

Publisher DOI:

10.3390/agriculture7110090

ARBOR DOI:

10.24451/arbor.8459

URI:

https://arbor.bfh.ch/id/eprint/8459

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