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Agriculture 2018, 8(3), 43; https://doi.org/10.3390/agriculture8030043

Hungry Plants—A Short Treatise on How to Feed Crops under Stress

Institute for Crop and Soil Science, Julius Kühn-Institut, Bundesallee 69, D-38116 Braunschweig, Germany
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Received: 31 January 2018 / Revised: 13 March 2018 / Accepted: 15 March 2018 / Published: 17 March 2018
(This article belongs to the Special Issue Plant Nutrient Dynamics in Stressful Environments)
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Abstract

Fertilisation is as old as is the cultivation of crops. In the 19th century, plant nutrition became an area of research in the field of agricultural chemistry. Liebig’s “Law of the Minimum” (1855) is still the basis for plant nutrition. It states that the exploitation of the genetically fixed yield potential of crops is limited by that variable, which is insufficiently supplied to the greatest extent. With a view to abiotic and biotic stress factors, this postulation should be extended by the phrase “and/or impaired by the strongest stress factor”. Interactions between mineral elements and plant diseases are well known for essential macro- and micronutrients, and silicon. In comparison, the potential of fertilisation to alleviate abiotic stress has not been compiled in a user-orientated manner. It is the aim of this chapter to summarise the influence of nutrient deficiency in general, and the significance of sodium, potassium, and silicon, in particular, on resistance of crop plants to abiotic stress factors such as drought, salinity, and heavy metal stress. In addition, the significance of seed priming with various nutrients and water to provide tolerance against abiotic stress is discussed. Underlying physiological mechanisms will be elaborated, and information on fertiliser application rates from practical experiences provided. View Full-Text
Keywords: drought; heavy metal pollution; no-effect value; potassium; salinity; seed priming; silicon; sodium drought; heavy metal pollution; no-effect value; potassium; salinity; seed priming; silicon; sodium
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Haneklaus, S.H.; Bloem, E.; Schnug, E. Hungry Plants—A Short Treatise on How to Feed Crops under Stress. Agriculture 2018, 8, 43.

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