應用綠肥建立水稻—硬質玉米環境親和型輪作模式(建立硬質玉米環境親和型輪作模式)

Abstract

為因應氣候變遷對台灣硬質玉米生產之考驗及現行耕作制度的衝擊，以硬質玉米品種選擇搭配環境親和型栽培方式，規劃二年一輪環境親和型水旱田輪作模式，規劃重點為輪作綠肥與水旱田輪作。試驗結果，輪作綠肥可減施化學肥料避免土壤酸化、提升土壤有效性磷含量及降低土壤電導度，減緩土壤鹽化。以土壤地力維護及輪作收益為評估指標，輪作模式B：一期水稻－二期青皮豆－裡作晚熟玉米 (第一年) －一期青皮豆－二期水稻－裡作早熟玉米 (第二年) 為較佳之輪作模式。 In response to the impact of climate change on the feed corn production and existing farming systems in Taiwan, applied different feed corn varieties with environment-friendly cultivation methods, planned for 2-years a round crop rotation patterns. The rotation patterns focuses on paddy field and dry land rotation and green manure application. The results showed that compared with the control, green manure application can reduce chemical fertilizer usage to avoid acidification, improve soil phosphorus content, reduce soil EC value and slow down soil salinization. Soil fertility maintain and cash earnings of crop rotation for the assessment index, rotation model B is the preferred mode of rotation. Model B：first crop season Rice →second crop Green manure →winter crop late variety Feed corn (First year)→first crop Green manure →second crop Rice →winter crop-f early variety Feed corn (Second year).