Approaches to Improving Salt Tolerance in Maize

Chellamma, Sreekala; Pillai, Bhinu V. S.

doi:10.1007/978-1-4614-6108-1_11

Cited by 3 publications

(2 citation statements)

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“…For maize, the values obtained were 82.6 and 44.5% for D1 and D2, respectively, probably due to the salinity effect of the digestate on this salt-sensitive crop (Chellamma and Pillai 2013) and greater fertility of S2 with respect to S1. High N replacement values for digestate applied to a maize crop were reported by Grillo et al (2021), but Häfner et al (2022 reported mineral fertiliser equivalents for digestates of between 27.6 and 49.0% in the first year for a maize crop in a field experiment (the greatest value was for food waste digestate, 69.9% in the second harvest).…”

Section: Discussionmentioning

confidence: 92%

“…In cardoon, Na + and K + show distinct effects: high concentrations of the latter produce stronger adverse effects than the same concentrations of Na + , so that high accumulation of K + in the plant is more toxic (Benlloch-González et al 2005). However, maize is considered a saltsensitive crop plant, and its yield is affected even by low concentrations of salt (Chellamma and Pillai 2013). Salinity causes osmotic and ionic stresses in maize plants, leading to reduced shoot extension and limited plant growth as well as nutrient imbalances.…”

Section: Discussionmentioning

confidence: 99%

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Carbon and Nitrogen Mineralisation in Soils and Nutrient Efficiency of Digestates from Fruit and Vegetable Wastes

Álvarez-Alonso

Clemente

Bernal

2022

J Soil Sci Plant Nutr

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A significant amount of fruit and vegetable wastes is generated annually in markets, supermarkets, restaurants and households. Anaerobic digestion allows their appropriate management and helps to complete the cycle of the circular economy as it converts wastes into resources: biogas, a renewable source of energy, and digestate, rich in nutrients of interest for agriculture. The aim of this study was to define the agronomic value of digestate from fruit and vegetable wastes. Two digestates from fruit and vegetable residues were used in incubation experiments for C and N mineralisation in the soil, and in a pot experiment with crops (cardoon and maize), to calculate their fertiliser potential in comparison with a mineral fertiliser. The digestate quickly mineralised in the soil and nitrification processes led to fast formation of NO3−-N. However, increasing the digestate application rate enhanced N-immobilisation and reduced N-mineralisation in the soil. The addition of digestates to the soil resulted in adequate plant growth and nutrient composition, without any negative effects on the plants or soil. However, special attention should be paid to the salt accumulation in the soil for long-term digestate application. The nutrient recovery efficiency indicated that digestate could replace mineral fertiliser completely in cardoon crops and partially (44.5–82.6%) for maize, with an associated economic benefit. The salinity of the digestates limits their quality and their agricultural use to salt-sensitive crops should be limited.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%