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http://dx.doi.org/10.11625/KJOA.2016.24.4.719

No-Tillage Agriculture of Korean-Style on Recycled Ridge II. Changes in Physical Properties : Water-Stable Aggregate, Bulk density, and Three Phase Ratio to Retain Water at Plastic Film Greenhouse Soil in No-Tillage System  

Yang, Seung-Koo (전라남도농업기술원 친환경농업연구소)
Shin, Gil-Ho (전라남도농업기술원 친환경농업연구소)
Kim, Sun-Kook (전라남도농업기술원 친환경농업연구소)
Kim, Hee-Kwon (전라남도농업기술원 친환경농업연구소)
Kim, Hyun-Woo (전라남도농업기술원 친환경농업연구소)
Jung, Woo-Jin (전남대학교 농업생명과학대학 농화학과 친환경농업연구소)
Publication Information
Korean Journal of Organic Agriculture / v.24, no.4, 2016 , pp. 719-733 More about this Journal
Abstract
This study was carried out to investigate the effect of no-tillage on sequential cropping supported from recycling of first crop ridge on the productivity of crop and physical properties of soil under green house condition. This study is a part of "No-tillage agriculture of Korea-type on recycled ridge". From results for distribution of soil particle size with time process after tillage, soil particles were composed with granular structure in both tillage and no-tillage. No-tillage soil in distribution of above 2 mm soil particle increased at top soil and subsoil compared with tillage soil. Tillage and one year of no-tillage soil were not a significant difference at above 0.25 mm~below 0.5 mm, above 0.5 mm~below 1.0 mm, and above 1.0 mm of water-stable aggregate. Two years of no-tillage soil was significantly increased by 8.2%, 4.5%, and 1.7% at above 0.25 mm~below 0.5 mm, above 0.5 mm~below 1.0 mm, and above 1.0 mm of water-stable aggregate, respectively, compared with one year of no-tillage. Bulk density of top soil was $1.10MG\;m^3$ at tillage and $1.30MG\;m^3$ at one year of no-tillage. Bulk density of top soil was $1.14MG\;m^3$ at two years and $1.03MG\;m^3$ at three years of no-tillage, respectively. Bulk density of subsoil was a similar tendency. Solid phase ratio in top soil and subsoil was increased at one year of no-tillage compared with tillage soil, while soil phase ratio decreased at two and three years of no-tillage. Pore space ratio in tillage top soil (58.5%) was decreased by 8.5% at compared with no-tillage soil (51.0%). Pore space ratio was 56.9% and 61.2% at two and three years of no-tillage soil, respectively. Subsoil was a similar tendency. Gaseous phase ratio was decreased at one year of no-tillage soil, and increased at two and three years of no-tillage soil compared with tillage soil. Liquid phase ratio in top soil was increased at one year of no-tillage (28.3%), and decreased at two years (23.4%) and at three years (18.3 %) of no-tillage soil compared with tillage soil (24.2%). Subsoil was a similar tendency. Liquid phase ratio in subsoil was increased than top soil.
Keywords
aggregate; bulk density; correlation; no-tillage; three phase ratio;
Citations & Related Records
Times Cited By KSCI : 10  (Citation Analysis)
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