【摘要】 青海东部山旱地土壤耕作主要集中在春秋两季。据观测,春季在解冻前打耱保墒的麦田比对照0～40cm土体中共增加水分31.6mm。春翻施肥比秋施肥播前土壤水分少1.34%。播后耙地一遍和两遍的麦田比未耙地的水分高0.13%和1.76%。中耕一次和两次麦田比未中耕的水分高1.35%和1.99%。伏耕、秋耕、板茬麦田翌年播前土壤水分含量分别为22.04%、20.16%、14.28%。春小麦收后及时耕翻、收后4天翻、收后7天翻、收后10天未翻1m深土体中水分含量分别为293mm、263mm、237mm。“三九”碾地与未碾地的土壤水分相比,比播前0～10cm的高3.2%,比10～20cm的高2.1%,比出苗期0～10cm的高2.6%,比10～20cm的高1.4%。更多还原

【Abstract】 Soil tillages in dry mountain lands in the east part of Qinghai Province chiefly con-centrate on spring and autumn.Based on the deatermination and observation,before thethawing,the moisture in the pulverized wheat fields can increase 31.6mm higher thanthat in the control in the 0～40cm soil body.Spring plaughing with fertilizer applicationhas 1.3% soil moisture less than that by autumn fertilizer application perior to theplaughing.After sowing,wheat fields pulverized once and twice have 0.13% and1.76% of soil moisture higher than those in wheat fields without being pulverized.Also,wheat fields with hoeing once and twice have 1.35% and 1.99% of moisture high-er than that in wheat fields without being pulverized once and twice respectively.Soilmoisture in wheat fields with summer plaughing and autumn plaughing and withoutplaughing prior to sowing is 22.0%,20.16% and 14.2% respectively.After springwheat is harvested,fields are plaughed at the intervals of 4 days,7 days,and 19 days,moisture conditions in one meter soil body is 293mm,263mm and 237mm respectively.In cold winter days,soil moisture in 0～10 cm soil layer is 3.2% higher than that in thefields without pulverizing before sowing;2.1% higher than that in 10～20 cm and2.6% higher than that in 0～10cm in seedling emergence period;and 1.4% higher thanthat in 10～20 cm soil body.更多还原