保墒指保持住土壤里适合种子发芽和作物生长的湿度。保持水分不蒸发，不渗漏，例如播种后地要压实，是为了减少孔隙，让上层密实的土保住下层土壤的水分。
... preservation 持续; 持续; 保存 preservation of soil moisture 保墒 preservative 防腐剂; 防腐剂 ...
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Three kinds of film Mulch is with better soil moisture conservation effect, which can regulate soil moisture space-time distribution.
3种覆膜均具有较好的蓄水保墒效应,能够调节土壤水分的空间—时间分布。
参考来源 - 渭北旱塬不同类型地膜覆盖对土壤环境和冬小麦生长的影响·2,447,543篇论文数据，部分数据来源于NoteExpress
书认为土壤管理、保墒和保肥是相互联系的。
The Book pointed out that there existed relation among soil management, preservation of soil moisture and preservation of soil fertility.
该技术的应用有利于保墒和根系的恢复与再生；
It is suitable preservation of soil moisture and poplar root recover and renew.
超过一定量反而降低土壤蓄水保墒能力，对树木生长不利。
Exceed certain quantity to turn over and reduce soil retain water to preserve soil moisture ability, for trees growth disadvantage.
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