期刊
HORTSCIENCE
卷 50, 期 10, 页码 1572-1581出版社
AMER SOC HORTICULTURAL SCIENCE
DOI: 10.21273/HORTSCI.50.10.1572
关键词
biochar; soilless; hydroponics; tomato
类别
Greenhouse tomato (Lycopersicum esculentum Mill.) producers are urged to reduce their environmental footprint. Here, the suitability of biochar produced from tomato crop green waste as a substrate for soilless, hydroponic tomato production was evaluated. Substrates containing different combinations of biochar (BC) and pine (Finns radiata D. Don) sawdust (SD) were produced (BC0-SD100, BC25-SD75, BC50-SD50, BC75-SD25, and BC100-SD0) and characterized. The effect of these substrates on tomato growth, yield, and fruit quality was studied. Most of the measured properties of substrates containing biochar were suited to use as a soilless substrate. The electrical conductivity (EC) of substrates containing biochar was initially high (>4.6 mS.cm(-1)), but was easily reduced to <0.5 mS.cm(-1) by rinsing with water before use. The pH of substrates containing biochar was higher than is considered acceptable for tomato production (7.5-.9.3) but did not significantly (P<0.05) affect any plant growth, yield, and fruit quality indicators measured compared with those of plants grown in pine sawdust. The results support the concept of creating a closed loop system whereby biochar produced from tomato crop green waste is used as a substrate for soilless, hydroponic tomato production, providing a sustainable means to support the growth of high-value food crops.
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