תפריט נגישות
ניגודיות עדינהניגודיות גבוהה
מונוכרום
הדגשת קישורים
חסימת אנימציה
פונט קריא
סגור
איפוס הגדרות נגישות
להורדת מודול נגישות חינם תפריט נגישותניגודיות עדינהניגודיות גבוההמונוכרוםהדגשת קישוריםחסימת אנימציהפונט קריאסגוראיפוס הגדרות נגישותלהורדת מודול נגישות חינםBiochar is thought to have great potential as a supplemental amendment in nursery growing media. The knowledge of how to optimize the use of biochar in the nursery setting during the most vulnerable pre-emergence and early seedling stages of the plant, however, is underdeveloped. The current study involves pre-emergence trials in the Pythium aphanidermatum-cucumber pathosystem using a commercial nursery potting mixture amended with up to 3% w:w wood-derived biochar. The major questions were: (i) is pre-conditioning required to elicit suppression of pre-emergence damping-off disease in the Pythium-cucumber system; (ii) what are the changes in bacterial community composition and diversity due to pre-conditioning of the biochar-amended potting medium; and (iii) can the pre-conditioning stage be shortened from 45 days and still provide disease suppression. Pre-conditioning, consisting of pre-planting fertigation of the nursery medium, was found to be needed to achieve suppression of damping-off disease by biochar, with a reduction in pre-emergence damping-off caused by P. aphanidermatum by up to 71%. Illumina sequencing of 16s bacterial gene revealed a significant enrichment in the abundance of bacteria in general and potentially beneficial microorganisms in particular, as well as shifts in microbial community structure as a result of biochar addition. These changes may play an important role in the overall effects of biochar on disease suppression in young seedlings. A pre-conditioning period of only 14 days was found to be effective for disease suppression, which can substantially improve its practical utility for nurseries. © 2019 Elsevier Ltd
Department of Plant Pathology and Weed Research, Institute of Plant Protection, Agricultural Research Organization (ARO), The Volcani Center, Rishon-Letzion, 7505101, Israel; Department of Soil Chemistry, Plant Nutrition and Microbiology, Institute of Soil, Water and Environmental Sciences, The Volcani Center, Rishon-Letzion, 7505101, Israel; Department of Plant Pathology and Microbiology, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, 761001, Israel; Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, United States
Biochar is thought to have great potential as a supplemental amendment in nursery growing media. The knowledge of how to optimize the use of biochar in the nursery setting during the most vulnerable pre-emergence and early seedling stages of the plant, however, is underdeveloped. The current study involves pre-emergence trials in the Pythium aphanidermatum-cucumber pathosystem using a commercial nursery potting mixture amended with up to 3% w:w wood-derived biochar. The major questions were: (i) is pre-conditioning required to elicit suppression of pre-emergence damping-off disease in the Pythium-cucumber system; (ii) what are the changes in bacterial community composition and diversity due to pre-conditioning of the biochar-amended potting medium; and (iii) can the pre-conditioning stage be shortened from 45 days and still provide disease suppression. Pre-conditioning, consisting of pre-planting fertigation of the nursery medium, was found to be needed to achieve suppression of damping-off disease by biochar, with a reduction in pre-emergence damping-off caused by P. aphanidermatum by up to 71%. Illumina sequencing of 16s bacterial gene revealed a significant enrichment in the abundance of bacteria in general and potentially beneficial microorganisms in particular, as well as shifts in microbial community structure as a result of biochar addition. These changes may play an important role in the overall effects of biochar on disease suppression in young seedlings. A pre-conditioning period of only 14 days was found to be effective for disease suppression, which can substantially improve its practical utility for nurseries. © 2019 Elsevier Ltd
