轉作玉米田土壤肥力限制因子研究
Other Title
Study on Fertility Constraints of the Paddies Converted for Corn Production
Journal
中華農業研究
Journal Volume
37
Journal Issue
2
Pages
165-176
Date Issued
1988-06-07
Date
1988-06-07
Author(s)
李子純
Tze-Shun Lee
Abstract
本研究係利用廳屬各農改場設於全省之轉作玉米田適栽標準栽培區進行者，研究期作及地點包括73年秋作共46點，74年春作共32點。進行方法爲於各標準栽培區整地施肥前採取其土壤樣本及剖面，前者作各項理化性質分析，後者爲瞭解各試區土系及底土性質、排水狀況等。玉米發芽後30-45 日採取值株樣本作葉片分析，以明瞭其營養狀況，並利用「診斷推薦綜合系統」(DRIS)方法計算各養分之指數(DRIS indices)，尋找限制因子，以與土壤分析資料對照。收獲後記錄其產量，目的爲探討本省各地轉作田之土壤肥力限制因子。同時在各標準栽培設無磷區，不施磷肥，以比較磷肥效果，期能獲得轉作田之玉米磷肥診斷標準。This study was carried out on all the standardized corn cultivation plots laid out islandwide for corn adaptation on the converted paddies. Fourty-six plots in the autumn crop, 1984, and thirty-two plots in the spring crop, 1985 were included in this study.
Surface and sub-soil samples were collected from each of these plots be-fore land preparation and fertilization, physical and chemical properties were analyzed. Plant samples were taken twice: once for whole corn plants 30 to 45 days after emergence, and once for ear leaf at the silking stage. Nutrient concentration were determined and DRIS indices calculated for each element. To evaluate P response and P diagnostic criteria, 100m^2 within each of the 500m^2 plots applied no phosphorus. Yields were recorded after harvesting.
Publisher
農業試驗所
Type
journal article
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