论文部分内容阅读
以松辽平原玉米带高产培育土壤与平产土壤(常规耕作土壤)为研究对象,在田间调查采样的基础上,研究土壤有机碳与全氮在松辽平原不同地区两种土壤中的含量分布状况。结果表明,乾安、公主岭和扶余3地的高产土壤有机碳与全氮含量较高,而在其他地区高产土壤的有机碳与全氮含量则低于平产土壤。各采样地区之间C/N差异较大,对于C/N较低的土壤,高产培育措施可以有效提高其C/N。相同采样地区的高产土壤与平产土壤的C/N较为相近,没有显著差异。松辽平原玉米带耕层与犁底层的交界面随耕作方式的不同而呈现“波浪”和“平面”两种形态,平面型耕地作物产量更高。高产土壤不同深度下的碳氮含量分布也不同,呈现表面聚集的趋势。因此,改善松辽平原玉米带土壤肥力特征,需要综合考虑施肥方式、土壤特性等多种因素。
Based on field survey and sampling, the content distribution of soil organic carbon and total nitrogen in two kinds of soils in different areas of Songliao Plain was studied with high-yielding and normal-yield soils (conventional tillage soils) situation. The results showed that the organic carbon and total nitrogen contents of high yielding soil were higher in the areas of Qian’an, Gongzhuling and Fuyu, while the contents of organic carbon and total nitrogen in high yielding soils in other areas were lower than those in the plain soil. The differences of C / N between sampling areas are larger. For the soil with lower C / N, high-yielding cultivation measures can effectively increase C / N. The C / N ratio of high-yielding soil and flat-producing soil in the same sampling area is similar, with no significant difference. The interface of maize belt plow and bottom layer of plow in Songliao Plain showed two patterns of “wave” and “plane” with different tillage patterns, and the output of flat-type cropland was higher. The distributions of carbon and nitrogen in different depths of high-yielding soils were also different, showing the tendency of surface aggregation. Therefore, to improve the soil fertility characteristics of the maize belt in Songliao Plain, we need to consider various factors such as fertilization mode, soil characteristics and so on.