水是构成牧草本身的主要组成成分,一般陆生植物的含水量为其鲜重的75％左右,而且牧草制造碳水化合物,吸收无机养料,运送营养物质等生理过程也必须在有水份的条件下才能进行。因此,牧草在正常生长发育过程中必需消耗大量水分。据有关资料报导,一般牧草每形成一克干物质约消耗600—700克水。牧草需水量的多寡又常因地区、土壤、气候、栽培 Water constitutes the main component of pasture itself. Generally, the terrestrial plants have a water content of about 75% of their fresh weight, and the physiological processes of forage production of carbohydrates, absorption of inorganic nutrients, transport of nutrients and the like, Under can proceed. Therefore, forage grass in the normal growth and development must consume a lot of water. According to the information reported, the general pasture formation of one gram of dry matter consumes about 600-700 grams of water. The amount of pasture water demand is often due to the region, soil, climate, cultivation