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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)。5~20 cm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)。
Three kinds of conservation tillage measures, ie, subsoiling (DS), no-till (NS) and field-returning (MS) Hydrothermal and corn yield components. The results showed that compared with CK, the three conservation tillage measures of DS, NS and MS all inhibited the soil evaporation and increased soil moisture content in topsoil, but the treatment with NS was the best, with a decrease and an increase of 50.00 % And 11.48% (P <0.05). The order of soil temperature in 5 ~ 20 cm soil layer is MS> CK> DS> NS. Compared with CK, DS treatment significantly increased (P <0.05) the number of ears, the number of grains per ear and the weight of 100 seeds, and significantly increased the yield by 33.30% (P <0.05).