傾斜地 果樹園의 開園方法과 土壤管理法이 土壤의 粒團化와 腐埴含量에 미치는 影響 = Effects of Different Establishment Methods and Soil Management Systems for Slope-land Orchard on Granulation and Humas Quantity

국문 초록 (Abstract)

傾斜地 果樹園에 알맞은 合理的인 開園方法과 土壤管理法을 摸索하기 위하여, 이와같은 곳에 알맞으리라 假想되는 몇가지의 開園方法과 土壤管理法을 選定하여, 이들이 果樹園의 地力과 가장 關係가 깊은 土壤의 粒團形成과 腐埴含有量에 미치는 影響을 調査하였다.
Split plot design에 依據하여, 主區로서는 等高線難立區와 階段田構築區 및 標準區를 두고, 細區로서는 淸耕區와 草生區, 敷草區의 3種類를 두어 試驗하였는데, 試驗結果의 大要는 다음과 같았다.
1. 各 試驗區의 粒團分析 結果는 開園方法間에서는 階段田構築區가 粒團含量이 越等히 높고, 等高線難立區도 標準區에 比하여 높은 傾向이 있었으며, 土壤管理法間에서는 敷草區가 다른 區보다 높은 傾向이 있었다.
2. 本 試驗地의 腐埴含有量은 平均 1.85%에 不過하였으며, 年中의 腐埴消耗量은 全腐埴量의 15%에 達하는 아주 높은 消耗量을 나타내고 있었다.
3. 試驗區에 따른 腐埴含有量은 開園方法間에서는 階段田構築區와 等高線難立區가 標準區에 比하여 越等히 높았고, 土壤管理法間에서는 草生區-敷草區-淸耕區의 順位로 높았다.

다국어 초록 (Multilingual Abstract)

As a trial to find an effective establishment method and soil management system for slope-land orchard, this study was made to investigate effects of those on granule formation and humas quantity in orchard soil.
The author established three main plots-control, contour tillage and bench terrace plot-and three split plots-clean culture, sod culture and grass mulch plot-according to split plot design. Sample soil of each experimental plot was gathered on November 2 this year and analysed.
The results obtained as follows:
1. Granule formation among establishment methods was most excellent in bench terrace plot soil, also one in contour tillage plot soil was considerably good compared with that in control plot soil. Among soil management systems, one in grass mulch plot soil tended to be good than those in other plot soil.
2. The slope land used as experimental plots had humas quantity of only 1.85 percent, and this land exhausted a largy humas quantity amounted to 15 percent of total humas in a year.
3. Humas quantities in both bench terrace and contour tillage plot soil were much more compared with that in control plot soil. Among soil management systems, one in sod culture plot soil was most and one in grass mulch plot soil more than that in clean culture soil