氮供應形態、強度、及容量因子對水稻生育的影響

Abstract

以自動循環水耕栽培法，比較在大容積但低濃度的氮肥源源不斷地供應下，氮濃度及氮源型態對水稻生育的影響。並觀察台農38號(梗稻)及台大育43號(秈稻)對氮肥的反應是否有異。氮濃度變級為銨態氮分2, 4, 8, 16 ppmN四級，硝酸態氮分10, 20 ppmN兩級，漁網室中台北之天然氣候環境下進行一、二級作試驗，其結果摘述如下。 In this study, one indica varieity (NTU43) and one japonica variety (TN38) were grown in continuously circulated hydroponic solutions. Nitrogen concertrations were kept at 2, 4, 8 and 16 ppm of NH4-N or 10 and 20 ppm of NO3-N. Two crops were grown during the first and second rice crop seasons.