研究结果表明，水稻品种在旱作条件下其分蘖期、拔节长穗期、抽穗开花期和灌浆期耐旱性不同，采用地膜覆盖可有效阻挡地面蒸发，节水效率达６０～８５％，生育期延长７～９ｄ，分蘖力增强，最高分蘖数比水作的多１７０１×１０４·ｈｍ－２，有效穗数增加，但每穗粒数、结实率和千粒重下降，其产量水平与水作差异不显著．覆膜旱作水稻前期生长优势强，但后期叶面积指数（ＬＡＩ）、净同化率（ＮＡＲ）、群体生长率（ＣＧＲ）和比叶重等均有所降低，灌浆速度较慢，经济系数较低 The results showed that under drought conditions, rice cultivars had different drought tolerance at tillering stage, jointing and heading stage, heading and flowering stage and grain filling stage. Covering with mulching film could effectively prevent ground evaporation, saving water efficiency of 60-85% Prolonged 7 to 9 days, tillering ability increased, the maximum number of tillers was 170.1 × 104 · hm-2 more than that of water, the effective panicles increased, but the grains per spike, seed setting rate and 1000-grain weight decreased. The differences are not significant. However, the leaf area index (LAI), net assimilation rate (NAR), population growth rate (CGR) and specific leaf weight decreased at the later stage, the filling speed was slower and the economic coefficient was lower low