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在盆栽条件下,以等量不同种类氮肥作基肥施用于油菜,硫铵的利用率为58.66％,碳铵为55.94％。在添加ASU后,利用率分别为63.83％和59.10％,比不加ASU的提高5.17％和3.16％.植株中基肥氮在籽粒中的比率,硫铵的为67.88％,碳铵的为66.13％;添加ASU后,分别提高到74.52％和73.54％,表明油菜所吸收的氮大部分用来形成籽粒;同时在基肥中添加ASU后叶片中的氮素比率相对减少,说明ASU有利于氮向籽粒运转,碳铵尤为明显.用15N-碳铵作追肥施于油菜表土层,其利用率为27.40％,仅为基肥的50％左右,说明碳铵作基肥深施显著优于追肥。
Under potted condition, the same amount of different types of nitrogen fertilizer as the base fertilizer applied to rape, the utilization rate of ammonium sulfate was 58.66%, ammonium bicarbonate was 55.94%. After adding ASU, the utilization rates were 63.83% and 59.10%, respectively, 5.17% and 3.16% higher than those without ASU.The ratio of basal fertilizer N and N in the grains was 67.88% for ammonium sulfate and 66.13% for ammonium bicarbonate, ; ASU increased to 74.52% and 73.54% respectively, indicating that most of the nitrogen uptake by rapeseed was used to form seeds. At the same time, the proportion of nitrogen in leaves decreased with the addition of ASU, which indicated that ASU was beneficial to the accumulation of nitrogen Operation, ammonium bicarbonate is particularly evident.Using 15N-ammonium bicarbonate as topdressing applied topsoil, the utilization rate of 27.40%, only about 50% of basal fertilizer, indicating that ammonium bicarbonate as a base fertilizer was significantly better than top dressing.