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为了研究不同利用方式紫花苜蓿地土壤含水量和土壤容重的季节和剖面变化特征,试验采用样点定位、季节动态监测的方法,对苜蓿种子田和苜蓿生产田的土壤含水量和土壤容重进行了测定。结果表明:0~<10 cm土层紫花苜蓿种子田和紫花苜蓿生产田土壤含水量总体表现为随着月份的增加呈现“W”型变化趋势,最大值均在7月下旬出现,分别为27.30%和23.79%;≥10~<20 cm土层和≥20~<30 cm土层土壤含水量各月份差异不大。0~<10 cm土层苜蓿种子田和苜蓿生产田土壤容重随着月份的增加呈现先降低后增加之后又降低的趋势,总体表现为苜蓿种子田>苜蓿生产田;≥10~<20 cm和≥20~<30 cm土层变化比较平稳。苜蓿种子田和苜蓿生产田土壤含水量和容重在垂直方向随着土层深度的增加表现出不同的变化规律。
In order to study the seasonal and profile changes of soil moisture content and soil bulk density of alfalfa land under different utilization patterns, the soil moisture content and soil bulk density of alfalfa field and alfalfa field were studied by sampling location and seasonal dynamic monitoring Determination. The results showed that the soil water content of alfalfa field and alfalfa field in 0 ~ <10 cm soil layer showed the trend of “W ” with the increase of the month, the maximum appeared in late July, respectively Which is 27.30% and 23.79% respectively. There was no significant difference in soil moisture content between ≥10 ~ <20 cm soil layer and ≥20 ~ <30 cm soil layer in each month. The soil bulk density of alfalfa seedling and alfalfa production fields in 0 ~ 10 cm soil layer decreased at first and then decreased and then decreased with the increase of the month. The overall performance was alfalfa seed field> alfalfa production field; ≥10 ~ <20 cm and The soil layer changes more stable from 20 to <30 cm. Soil moisture content and bulk density of alfalfa field and alfalfa field showed different variation along with the increase of soil depth in the vertical direction.