【摘要】 通过１９９６年和１９９８ 年两年田间试验，研究了吉林黑土上化肥对玉米的增产效应及肥料利用率。结果表明：Ｎ肥是主导的增产因素，其最佳产量和最佳施肥量分别为１２７３８．６ｋｇ／ｈｍ ２ 和２９１．６ｋｇ／ｈｍ ２，及１１５４２．７ｋｇ／ｈｍ ２ 和２７７．８ｋｇ／ｈｍ ２；不同Ｎ肥用量下肥料利用率分别变化在３２．３％ —６４．３％ 及３５．５％ —６２．２％ 之间。根据最佳产量找出“最佳”利用率分别在４９％ 和５１％ 左右。更多还原

【Abstract】 By way of field experiment in 1996 and 1998, studied on increasing production effect of fertilizer on maize and its utilization efficiency in black soil of Jilin. Obtained a result:N is the leading factor of increase production. Its optimum yield and N optimum applying amount is 12738.6kg/hm 2,291.6kg N/hm 2,and 11542.7kg/hm 2,277.8kg N/hm 2 respectively. The changeable range of its utilization efficiency of the different applying amount is 32.3%64.3% and 35.5%62.2%. On the base of the optimum yield, reaching a conclusion of the N optimum utilization efficiency is 49% and 51%.更多还原