【摘要】 研究了秸秆还田、深松两项技术及其交互效应对土壤肥力、玉米产量及其养分分配的影响。结果表明,与单施化肥相比,秸秆还田和深松措施能显著降低土壤容重,同时提高土壤田间持水量,其中,深松耕作对表层土壤(0~20 cm)作用大于深层土壤(20~40 cm)。秸秆还田措施明显增加土壤养分含量,而深耕措施对土壤养分含量无显著影响。另外,秸秆还田和深耕措施都能显著提高玉米籽实和秸秆产量,但是深松只在干旱年份能提高玉米的养分利用率。因此,秸秆还田配施NPK肥+深耕措施可成为该地区的提高产量和地力的推广技术。更多还原

【Abstract】 This study investigated the effects of deep loosening, straw returning and their interaction on soil fertility,maize yield and nutrient distribution. Our results showed that compared with fertilization of chemical fertilizer, straw returning and deep loosening measures could significantly reduce the soil bulk density and improve soil field capacity.The effect of deep loosening cultivation(0 ~ 20 cm) on surface soil was greater than that of the deep soil(20 ~ 40 cm).Straw returning significantly increased soil nutrients content, while deep loosening cultivation had no significant effect on soil nutrients content. In addition, straw returning and deep loosening measures could significantly increase the corn yield, but deep loosening could only increase nutrient utilization rate in a drought year. Therefore, straw returning with NPK fertilizer plus deep loosening measures could become one technology of increasing production and soil fertility in the study region.更多还原