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采用土壤深松 45cm、30 cm处理打破犁底层 ,1 996～ 1 998年连续进行 2个年度的冬小麦保墒、增产效应田间试验 .试验结果表明 :土壤深松处理后可减少冬小麦全生育期 0～ 1 0 0 cm的作物耗水量 ,促进根系对 1 0 0～ 2 0 0 cm土层土壤水分的利用 ,提高冬小麦的产量耗水比 .土壤深松处理能明显增加 0～ 30 cm土层的土壤湿度和含水量 ,降低 0～ 50 cm土层的土壤容重 .有利于冬小麦根系、茎、叶的生长发育和总生物量的累积 .土壤深松 45cm处理 2年平均冬小麦增产 7.0 % ,土壤深松 30 cm处理第一年增产 7.7% .冬小麦土壤深松保墒增产效应的适宜深松深度为 30 cm.
The soil was subsoiled for 45 cm and 30 cm to break the bottom layer of the plow and field experiments were conducted continuously for two years from 1996 to 1998. The results showed that soil subsoiling reduced winter wheat 0 ~ The water consumption of 100 cm soil layer promoted the utilization of soil moisture in the soil layer of 100 ~ 200 cm soil layer and increased the water consumption ratio of winter wheat. Soil subsoiling treatment significantly increased the soil of 0 ~ 30 cm soil layer Moisture content and water content of soil, and reduce soil bulk density in 0-50 cm soil layer, which is beneficial to the growth and total biomass accumulation of winter wheat roots, stems and leaves. Soil subsoiling 45 cm treatment 2-year average winter wheat yield 7.0% The yield increase of 7.7% in the first year of 30 cm treatment.