中文摘要：

以传统耕作为对照（CK）、设置深松还田（DS）、免耕还田（Ns）和翻耕还田（MS）3种保护性耕作措施，研究保护性耕作对夏玉米苗期土壤水热及玉米产量构成因素的影响。结果表明，与CK相比，DS、NS和MS三种保护性耕作措施均能不同程度的抑制土壤蒸发和增加耕层土壤含水量，而以NS处理效果最好，较CK依次减少和增加50．00％和11．48％（P〈0．05）。5-20cm土层地温大小顺序为MS〉CK〉DS〉NS。与CK相比，DS处理显著地增加了（P〈0．05）玉米穗数、穗粒数和百粒重，并且显著地提高了产量33．30％（P〈0．05）。

英文摘要：

Different tillage methods were designed using chisel ploughing with mulch（DS）, zero tillage with mulch（NS）, mould board plough with mulch（MS） and conventional tillage without mulch（CK） as tillage practices, meanwhile, their influences on soil moisture, soil temperature and crop growth were analyzed. The results showed that all three conservation tillage practices （DS, NS and MS） reduced soil evaporation and increased the soil moisture of soil layer. The performance of NS treatment was the best compared to other treatments, with a decrease up to 50% of soil evaporation and a increase up to 11.48 % of soil evaporation （P 〈 0.05） compared tthe control. The order of temperature in 5 - 20 cm soil layer was MS 〉 CK 〉 DS 〉 NS. The DS treatment not only significantly improved efficient ear, grains per ear and 100-grain weight, but also significantly increased the yield of 33.30%（P 〈 0.05 ）.