期刊
EUROPEAN JOURNAL OF AGRONOMY
卷 53, 期 -, 页码 38-44出版社
ELSEVIER
DOI: 10.1016/j.eja.2013.11.003
关键词
Biochar; Leaf water potential; Soil amendment; Vineyard; Water retention
类别
资金
- Eurochar project [265179]
Soil water status plays an important role in growth-yield and grape quality of Vitis vinifera (L.). In some cases, periods of moderate water stress have been indicated to exert a positive effect on the quality of grape production. However, prolonged water stress may have a strong negative affect grapevine photosynthesis and grape yield, especially in dry Mediterranean environments. Biochar is a co-product of a thermochemical conversion of biomass that is recognized to be a beneficial soil amendment, which when incorporated into the soil increases soil water retention. We investigated the effect of two rates of biochar application (22 and 44 ton ha(-1)) on plant water relations of V. vinifera in a field experiment in central Italy. Biochar obtained from the carbonization of orchard pruning waste was applied to the soil over two consecutive growing seasons. The treatments did not show a significant increase in soil hydrophobicity. Moreover, soil analysis and ecophysiological measurements indicated a substantial relative increases in available soil water content compared to control soils (from 3.2% to 45% in the 22 and 44 ton ha(-1) application rates, respectively) and in leaf water potential (24-37%) during droughts. (C) 2013 Elsevier B.V. All rights reserved.
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