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为了摸清旱塬耕地土壤物理性状,对耕层厚度、土壤容重和紧实度做了调查与分析。结果显示,耕层和犁底层土壤厚度均值分别为16.9、19.6 cm,耕层土壤较薄、犁底层土壤较厚。耕层和犁底层土壤容重均值分别为1.24、1.47g/cm~3,耕层土壤容重适宜、犁底层土壤容重较大。耕层和犁底层土壤紧实度均值分别为747、2 620 k Pa,耕层土壤紧实度尚合适、犁底层土壤紧实度过大。鉴于旱塬农田土壤紧实障碍严重程度,根据障碍形成原因,有针对性地采取适当措施以改良土壤。
In order to find out the soil physical characteristics of dryland plateau, the thickness of tillage, soil bulk density and compaction were investigated and analyzed. The results showed that the average soil thickness of the top layer of plow and plow was 16.9 and 19.6 cm, respectively. The topsoil was thinner and the bottom plow was thicker. The average bulk density of top soil and plow was 1.24 and 1.47 g / cm ~ 3, respectively. The suitable bulk density of topsoil and the large bulk density of plow bottom soil. Soil compaction average of plow and plow was 747,2 620 kPa, respectively. Soil compaction of topsoil was still suitable, and soil compaction of bottom plow was too large. Due to the seriousness of soil compaction barriers in dryland, the appropriate measures should be taken to improve the soil according to the causes of the obstacles.