2002 关键词：碱菀；形态结构；土壤总含盐量 [gap=1044]Key words ：Tripolium vulgare Nees;morphology and structure;total soil salt content
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Sometime the matrix potential of soil water, moisture capacity and the total content of salt capacity in the soil have the same trends of change with depth.
在包气带剖面中，在某时刻水土势、含水量、含盐量随深度变化的趋势相同。
Saline soil with salt content greater than 0.3% is widely distributed and accounts for 77.7% of the total irrigated area.
灌区盐碱土以全盐量大于0.3％的中度以上盐碱土分布较广，占灌区面积的77.7％。
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