中文摘要：

合理的种植方式可以在不增加灌溉耗水量的前提下,利用植物个体间的正相互作用关系和群体适应特点来达到提高作物产量和水分利用效率的目的。通过田间试验,研究了河西走廊黑河中游边缘绿洲区1穴1株、1穴2株和1穴3株种植方式对青贮玉米产量及水肥利用效率的影响。结果表明,1穴2株和1穴3株的地上生物产量均高于1穴1株,1穴2株最高,鲜重为102.9 t/hm~2,比1穴1株提高了29.4%;1穴2株与1穴1株之间存在显著差异（P〈0.05）,1穴3株与1穴1株之间差异不显著（P〉0.05）。同样,1穴2株和1穴3株的地上生物产量水肥利用效率也均高于1穴1株,1穴2株的水分和氮肥利用效率也均最高,分别为9.3 kg/m~3和342.9 kg/kg;1穴2株与1穴1株之间存在显著差异（P〈0.05）,1穴3株与1穴1株之间差异不显著（P〉0.05）。在河西走廊边缘绿洲区,采用1穴2株的种植方式能显著提高青贮玉米的地上生物产量和水肥利用效率,可在生产中推广应用。

英文摘要：

The high yield and water use efficiency would be acquired in a reasonable planting mode which utilizing positive mutual relationship among individuals and adapted characteristic in population without increased irrigation amount.Effects of different planting mode on yield and water and fertilizer use efficiencies were studied by field experiment in the marginal oasis regions of northern part of Linze in middle reach of Heihe River Basin.The results showed that：the above-ground biomass yield of two plants in one hole and three plants in one hole were higher than one plants in one hole,it was maximum in two plants in one hole and the fresh weight was 102.9 t/hm~2,and increased by 29.4%compared with one plant in one hole,the results of variance analysis showed the above-ground biomass yield of two plants in one hole had significant difference with that in one plant in one hole,but no significant difference between three plants in one hole and one plant in one hole.The water use efficiency and nitrogen use efficiency of two plants in one hole and of three plants in one hole were also higher than that of one plant in one hole,The water use efficiency and nitrogen use efficiency of two plants in one hole were also maximum and the values was 9.3 kg/m~3、342.9 kg/kg, respectively,they had significant difference with one plant in one hole,but three plants in one hole had no significant difference with one plant in one hole,this shows the high biomass yield and water and fertilizer use efficiencies would be acquired in two plants in one hole in the marginal oasis regions in middle reach of Heihe River Basin.