目前台灣小麥的種植區域，仍以中南部海岸為最佳種植區域，主要原因為濕 度較低，而台灣北部與東部因為濕度太高，植株生長勢較差，連帶影響產量與品 質。同時，小麥種植期，農民通常僅在初期灌水，但大雅農民張景洲先生在小麥 充實期灌水一至兩次，可以有效延長穀粒充實期，增加產量，提供充足水分使細 胞分裂與生長，雖然在模擬田間溫室氣體排放過程中此灌水記錄並沒有影響田間 溫室氣體排放，但卻有實際增加產量之效果，此與澳洲農部與美國 Nebraska 在 推廣生產高產量小麥之方針相似，應將此水分管理知識推廣給農民，提升產量後 也可更加強農民種植意願，以建立高產、高品質及環境親和的稻麥輪作系統。
柒、 總結與未來展望
本試驗目的為建立台灣本土氣候智慧型稻麥輪作栽培系統，經過兩年七期作 的調查與生命週期評估結果，台灣稻麥輪作整體的環境衝擊較國外為大，而稻麥 輪作整體環境衝擊的主要熱點為田間排放影響，而田間排放有諸多影響因子，如 農業操作、土壤性質、氣候、作物等。其中二期水稻與前人研究相似，其較一期 水稻生產所造成之環境衝擊為高，而小麥在三期作之間則變異較大，單期作最高 及最低環境衝擊皆在小麥種植期，代表小麥栽培有改善空間。而後以 DNDC 模 式模擬不同組合操作可能會調適的環境衝擊，調整施肥型態仍為目前最簡單也最 有效之調適方法，可以有效減少一至兩成的碳足跡；調整植株殘株殘留的比例短 期主要可以減少二氧化碳的排放，但與整地的效應一樣，都是屬於要長期操作才 能更確定影響整體排放之情況，因為像是土壤碳庫的改變及土壤性質改變都非一 兩年內可以表現的。不過已經有諸多研究關於長期田間操作對土壤影響，因此未 來發展低整地、精準施肥的稻麥輪作仍具有兼顧糧食安全及氣候變遷調適的能力。
目前台灣有採行稻麥輪作之地區主要是一年三作，不過未來推廣一年兩作的 稻麥輪作若僅照目前模擬情況，二期水稻休耕，一期水稻的種植時間仍被限縮，
因此有人提出育成稻麥輪作專用的水稻品種的想法，約五月插秧至九月收穫，這 樣可以避免水稻、小麥兩個期作互相擠壓，不乏為未來可利用的一種方法。
稻麥輪作具有諸多優點，期望本試驗提出環境親和的方針可以在實際田間應 用，以便建立未來台灣本土的氣候智慧型稻麥輪作系統。
捌、 文獻
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附表 一 大雅稻麥輪作試驗田之栽培曆
附表 一大雅稻麥輪作試驗田之栽培曆(續)
附表 二 台中場稻麥輪作試驗田之栽培曆
附表 二 台中場稻麥輪作試驗田之栽培曆(續) 5/31~6/3 6/6~6/12 6/20~6/26 7/2~7/6
7/25~7/31 8/5~8/9 8/12~8/16 5/31~6/5 6/6~6/10 6/20~6/26 7/2~7/7
7/31~8/6