חיפוש מתקדם
IOBC/WPRS Bulletin

Biochar (charcoal) is the solid co-product of biomass pyrolysis (thermal decomposition in the absence of oxygen). Amendment of soil with biochar is known to improve soil tilth, nutrient retention and crop productivity. We studied the effect of soil-applied biochar on plant productivity and plant foliar diseases. Biochar amendments to sand at levels of 1-3 weight % enhanced the growth of tomato and pepper plants. In addition, suppression of the powdery mildew caused by Podosphaera aphanis on strawberry plants grown in commercial coconut fiber:tuff growing mix was observed. Resistance was maximal with 3% biochar amendment as long as 6 months following planting. Reduction rates were 20 to 93% depending on the biochar percentage and sampling date. However, gray mold caused by Botrytis cinerea on strawberry leaves was not reduced upon biochar treatment. Similarly, root-nematode Meloidogyne javanica was not affected by biochar amendments in tomato grown in sandy soil. Biochar amendments moderately enhanced abundances of culturable general bacteria and Bacillus spp. but had no apparent effect on other tested culturable microorganisms. Studies designed to clarify the important systemic resistance metabolic pathways and its elicitors are underway. Biochar in soil has a very slow turnover (half-life of 1000s of years), and therefore, when introduced to soil it results in quasi-permanent sequestration of carbon. Soil treatment with biochar can thus serve as a climate change mitigation tool and an agriculture adaptation tool.

פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
Biochar impact on plant development and disease resistance in pot trials
78

Biochar (charcoal) is the solid co-product of biomass pyrolysis (thermal decomposition in the absence of oxygen). Amendment of soil with biochar is known to improve soil tilth, nutrient retention and crop productivity. We studied the effect of soil-applied biochar on plant productivity and plant foliar diseases. Biochar amendments to sand at levels of 1-3 weight % enhanced the growth of tomato and pepper plants. In addition, suppression of the powdery mildew caused by Podosphaera aphanis on strawberry plants grown in commercial coconut fiber:tuff growing mix was observed. Resistance was maximal with 3% biochar amendment as long as 6 months following planting. Reduction rates were 20 to 93% depending on the biochar percentage and sampling date. However, gray mold caused by Botrytis cinerea on strawberry leaves was not reduced upon biochar treatment. Similarly, root-nematode Meloidogyne javanica was not affected by biochar amendments in tomato grown in sandy soil. Biochar amendments moderately enhanced abundances of culturable general bacteria and Bacillus spp. but had no apparent effect on other tested culturable microorganisms. Studies designed to clarify the important systemic resistance metabolic pathways and its elicitors are underway. Biochar in soil has a very slow turnover (half-life of 1000s of years), and therefore, when introduced to soil it results in quasi-permanent sequestration of carbon. Soil treatment with biochar can thus serve as a climate change mitigation tool and an agriculture adaptation tool.

Scientific Publication
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