以玉米品种吉祥1号为指示品种，在旱作农业区会宁县太平乡大山川村试验观察了全膜双垄沟播二茬种植不同施肥量对玉米的影响，结果表明，施N 300 kg/hm2、P2O5 225 kg/hm2、K2O 60 kg/hm2为当地全膜双垄沟播二茬膜栽培玉米的最佳施肥量，其折合籽粒产量最高，为10 879.63 kg/hm2，较当地传统施肥水平(对照)增产8.80%；产值最高，为20 671.3元/hm2，较对照增加1 442.6元/hm2；收益最好，达17 798.8元/hm2，较对照增加437.6元/hm2。

A field experiment had been conducted in rain-fed Dashanchuan village， Taiping town， Huining county， the Jixiang1 used as the experimental cultivar， to investigate the effects of fertilizer rate on ditch sowing the second corn in double ridge mulched with plastic film. The result shows that the optimize chemical fertilizer rate are N application 300 kg/hm2， P2O5 225 kg/hm2 and K2O 60 kg/hm2， where ridge-furrow cultivation and plastic mulching for two years corn continuous planting， it grain yield is the highest， reached to 10 879.63 kg/hm2， increased by 8.80% compared with check. Its total income and net profit is also highest， reached to 20 671.3 Yuan/hm2 and 17 798.8 Yuan/hm2， which is 1 442.6 and 437.6 Yuan/hm2 higher than that of the check， respectively.

S513；S147.2