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http://dx.doi.org/10.7740/kjcs.2016.62.1.073

Effects of Mulching Materials on Platycodon grandiflorum Root Growth and Weed Occurrence  

Jeon, Seung-Ho (Research Center for Seed Utilization, Gyeongnam National University of Science and Technology)
Rho, Il-Rae (Department of Agronomy, Gyeongsang National Universsity)
Kim, Young-Guk (Department of Herbal Crop Research, NIHHIS, RDA)
Cho, Young-Son (Division of Agronomy & Medicinal Plant Resources, Gyeongnam National University of Science & Technology)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.62, no.1, 2017 , pp. 73-78 More about this Journal
Abstract
This study was conducted to elucidate the effects of mulching materials on root growth characteristics and weed occurrence of Platycodon grandiflorum transplants (3 years old) in organic farming. After transplanting, roots were mulched with one of three mulching materials (biodegradable film, sawdust, or rice husks) or a control (no mulching). The average root diameter of all mulching groups was 28.1 mm, which was 5.1 mm thicker than the no-mulching treatment. Roots with the biodegradable film treatment were the thickest at 30.9 mm. Root length was the shortest, 22.0 cm, with rice husk mulching. The number of rootlets was the highest with film mulching (36.0 rootlets/root) and the lowest with no mulching. For root fresh weight, which directly affects yield, the average of treated and untreated roots was 100 and 56 g/root, respectively. The highest fresh weight was in the biodegradable film plot (130 g/root). The mulching treatment groups showed a weed inhibition effect compared with the no-mulching treatment. The dominant weeds with the no-mulching treatment were Setaria viridis and Digitaria ciliaris, and that with the mulching treatment was Setaria viridis. Average annual weed occurrence across all treatments was 72%. Weed occurrence was the highest with the no-mulching treatment ($125weeds/m^2$), and there were no weeds with the biodegradable film treatment.
Keywords
biodegradable film; Platycodon grandiflorum; sawdust; transplanting culture; weed occurrence;
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