摘要
在小麦花生两熟制条件下 ,全年氮肥两作 3次施用 (小麦基肥、追肥和花生基肥 )氮素利用率为 3 2 52 % ,一作两次施用 (小麦基肥和追肥 )氮素利用率为 3 7 0 1 % ,但前者土壤残留多 ,损失少 ,氮肥回收率为 69 2 4% ,较后者高 1 2 0 3个百分点。且前者有利于小麦、花生产量的形成 ,是小麦花生两熟制适宜的施肥方式。小麦当茬氮肥利用率为 1 6 80 %～ 3 5 63 %。夏直播花生当茬及前茬小麦基肥和追肥 (拔节期 )的氮肥利用率分别为 2 3 70 %、6 57%～ 7 70 %和 1 0 0 3 %～ 1 2 73 % ;
Under the condition of wheat peanut(summer) cropping system, the nitrogenous fertilizer utilization ratio(NFUR) was 32 52% when the total annual nitrogenous fertilizer was applied to both crops by three times (base and top dressing to wheat and base fertilizer to peanut, M 3) and was 37 01% when the total annual nitrogenous fertilizer was applied to wheat by twice(base and top dressing to wheat, M 2). The nitrogen fertilizer recovery ratio was 69 24% in M 3, 12 03% higher than that in M 2. The yields of wheat and peanut in M 3 were 7 7% and 3 4%, respectively, higher than that in M 2, showing that the M 3 was ideal fertilizer application mode under the wheat peanut cropping system. The NFUR was 16 08%～35 63% for wheat and was 23 70% for peanut. The NFUR was 6 57%～7 70% for wheat with the base fertilizer and was 10 03%～12 73% for wheat with top dressing fertilizer (elongation stage). Great effects of fertilizer applying time and rate on the NFUR were observed.
出处
《核农学报》
CAS
CSCD
北大核心
2002年第2期98-102,共5页
Journal of Nuclear Agricultural Sciences
基金
山东省科委 (94 )第 8号
关键词
小麦
花生
两熟制
氮肥分配
产量
^15N示踪
氮肥利用率
氮同位素示踪
wheat, Peanut
two cropping system
nitrogenous fertilizer distribution
yields
15 N trace
nitrogenous fertilizer utilization ratio
