中文摘要：

为了揭示不同水分处理及覆盖处理对夏玉米耗水及产量的影响机制,通过田间试验,研究了宽垄种植下3种水分处理[土壤水分控制下限为田间持水量的60%（L-60）、70%（L-70）、80%（L-80）]和4种覆盖处理[覆盖率分别为50%（F1）、100%（F2）、150%（F3）以及不覆盖处理（F0）]对夏玉米阶段耗水规律及产量的影响。结果表明：同一水分处理下,秸秆覆盖增加了夏玉米的产量,其中F2处理增产效果最显著,增产率可达2.68%~4.58%;出苗—拔节期覆盖处理表现出明显的保墒能力,较F0处理最高可节水8.32~9.81 mm,拔节—抽雄期和抽雄—灌浆期降雨较多,适量秸秆覆盖能增强降雨的入渗,且蓄纳较多的雨水,而覆盖过厚则阻碍降雨的入渗,使降水止于覆盖层,最终导致大量的无效水蒸发,F2覆盖处理最适宜;结合水分处理和覆盖处理,L-70水分处理和F2覆盖处理效果最优,产量高达7 815.42 kg/hm2,耗水仅为366.09 mm,水分利用效率为2.13 kg/m3,降水利用效率为5.73 kg/m3,符合节水高产的宗旨。

英文摘要：

In order to reveal the influence mechanism of different water treatments and mulching treatments on water consumption and yield of summer maize,the effects of three water treatments[60% of field capacity（ L-60）,70% of field capacity（ L-70） and 80% of field capacity（ L-80） ]and four kinds of mulching treatments[50% coverage rates（ F1）,100% coverage rates（ F2）,150% coverage rates（ F3）and no coverage（ F0） ]on the water consumption regularity and yield of summer maize were studied under wide ridge planting in field. The results showed that the straw mulching increased the yield of summer maize under the same water treatment,the yield increase of F2 treatment was the most significant,which increased by 2. 68% —4. 58%. The coverage treatment showed obvious water retention capacity during the seedling to jointing stage,saving up to 8. 32—9. 81 mm compared with F0. There was more rainfall during the jointing to heading stage and heading to filling stage,and the appropriate amount of straw mulch could increase rainfall infiltration and accept more rainwater storage. If the cover was too thick to prevent rainfall infiltration,the rainfall ended in the cover,resulting in a large number of ineffective water evaporation. F2 treatment was the most appropriate treatment. Combined water treatment with mulching treatment,the water treatment of L-70 and coverage treatment of F2 had the best effect,its yield was up to7 815. 42 kg / ha,water consumption was only 366. 09 mm,water use efficiency was 2. 13 kg / m3,rainfall use efficiency was 5. 73 kg / m3,in line with the purpose of water saving and high yield.