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在辽宁省昌图县开展了深松对旱地玉米农田土壤容重、水分状况和作物产量影响的研究,结果表明深松使亚耕层土壤(20~40 cm)容重有降低趋势,但未达到显著水平。深松有效打破了犁底层,显著提高了水分输入初期(前2小时)水分入渗量,但对土壤田间持水量与玉米苗期和收获期1 m土层土壤水分含量没有显著影响。深松在干旱年份显著提高了玉米水分利用效率和籽实产量,但在降雨丰沛年份对玉米产量没有显著贡献。与正常深松相比,隔行深松同样利于籽实产量与水分利用效率的提高,二者间无显著差异,加之隔行深松具有节能、高效等优点,因此,可对隔行深松耕作模式加以推广。
The study on the effects of subsoiling on the soil bulk density, water status and crop yield of maize farmland in dry land in Changtu County, Liaoning Province showed that the subsoiling soil bulk density (20-40 cm) decreased with subsoiling, but did not reach significant Level. Subsoiling effectively broken the plow bottom and significantly increased water infiltration in early stage of water input (before 2 hours), but had no significant effect on field water holding capacity and soil water content in 1 m soil layer at maize seedling stage and harvest stage. Nongsong significantly increased maize water use efficiency and seed yield in drought years, but did not make any significant contribution to maize yield in abundant rainfall years. Compared with normal subsoiling, interlacing subsoiling also favored the improvement of seed yield and water use efficiency, with no significant difference between the two, combined with the advantages of energy saving and high efficiency of interlacing subsoiling, so that the interlacing subsoiling model could be popularized .