指在地下水较深和排水良好的土地上充分灌水或降水后,允许水分充分下渗,并防止其水分蒸发,经过一定时间,土壤剖面所能维持的较稳定的土壤水含量(土水势或土壤水吸力达到一定数值),是大多数植物可利用的土壤水上限。达到田间持水量时的土水势为-50~-350毫巴,大多集中于-100~-300毫巴间。不同土质田间持水量也有差异,一般黏土>壤土>沙土。
田间持水量(field capacity)是土壤中毛管悬着水达到最大量时的土壤含水量,是在不受地下水影响的情况下土壤所能保持水分的最高数量指标。
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田间持水量(field moisture capacity)是指当土壤中重力水全部排除,而保留全部毛管水和束缚水时的土壤含水量,是大多数植物可利用的土壤水上限。
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...穿龙薯蓣;田间持水量;光合作用 [gap=1330]Key words: crop cultivation; Dioscorea nipponica Makino; field water capacity; photosynthesis ...
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田间持水量(Field water holding capacity,FWHC)为22.9%,调萎湿度(Permanent wilting coefficient,PWC)为6.2...
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There wasn’t any law between soil field capacity and soil capillary height and amount of sulfur.
土壤田间持水量和毛管上升高度变化没有表现出明显的规律性。
参考来源 - 宁夏银川平原北部盐碱土硫磺改良研究·2,447,543篇论文数据,部分数据来源于NoteExpress
当过量的水从饱和土壤中排出后,余下的水量被称为田间持水量。
The amount of water that remains after the excess has drained away from the saturated soil is known as the field capacity.
实际上,垃圾内部结构不是均一的,田间持水量在不同层次也有差异。
Actually, the internal structure of garbage body is not uniform and the field capacity is also different in different layers.
但重度水分胁迫(土壤含水量为田间持水量的35%)抑制根系的生长,根系活力下降;
The growth of root was restrained and activity of root decreased under severe water stress ( water content of soil is 35% the content of field holding water).
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