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 1.播種期播種期關(guān)系到能否培育壯苗和適期移栽。適宜的播種期應(yīng)以氣候條件、移栽時(shí)期、育苗方法和適時(shí)成苗為依據(jù),根據(jù)當(dāng)?shù)匾圃詴r(shí)間向前推定。從播種到成苗所需時(shí)間的長(zhǎng)短,因各地育苗期氣溫高低、覆蓋保溫條件和性能及直播 (共 728 字) [閱讀本文] >>