论文部分内容阅读
以传统常规翻耕为对照(CK),设置秋季覆膜前深松整地处理,研究了农机深松对陇东旱塬区耕层土壤蓄水保墒性能及玉米生长和产量的影响。结果表明,深松整地蓄水保墒效果明显,能显著提高耕层15 cm以下土壤含水量;能打破土壤犁低板结层,显著降低犁底层25~35 cm土壤容重,改善土壤通透性,提高水的入渗性能,促进玉米健壮生长,增产效果显著。与传统耕作相比,玉米深松处理耕层15~35 cm土壤含水量提高13.89%、蓄水量增加65.25 m3/hm~2,相当于多增加6.53 mm的降水,耕层25~35 cm土壤容重下降率13.7%,玉米单产平均增加1 265.7 kg/hm~2,增产率13.04%。是黄土高原旱作农业区破解水分限制因子、提升农田水资源利用效率和促进粮食稳产增产的有效途径之一。
The conventional conventional tillage was used as control (CK), and the soil subsidence and soil preparation before planting in autumn were set up to study the effect of subsoiling of agricultural machinery on soil water storage, soil moisture retention and corn growth and yield. The results show that soil subsidence under deep subsoiling is obvious, which can significantly increase the soil water content below 15 cm. It can break the low ply layer in plow layer, significantly reduce the bulk density of soil layer at 25 ~ 35 cm in plow, and improve soil permeability Water infiltration performance, to promote the robust growth of corn, yield significant effect. Compared with the traditional tillage, the moisture content of 15 ~ 35 cm soil layer in subsoiling maize increased by 13.89% and the water storage increased by 65.25 m3 / hm ~ 2, equivalent to an increase of 6.53 mm more precipitation, 25 ~ 35 cm soil layer The rate of bulk density reduction was 13.7%. The average yield per hectare of maize was 1 265.7 kg / hm ~ 2, and the increase rate was 13.04%. Is one of the effective ways to solve the water limitation factor in the dry farming area of the Loess Plateau, enhance the utilization efficiency of farmland water resources and increase grain yield steadily.