无耗能控水袋释水规律及其特性研究

该文采用温室盆栽法，研究了无耗能控水袋释水规律。控水袋技术是采用无耗能水泵原理向植物提供水分，通过控水头释放水量。研究表明，控水袋的释水量主要取决于控水头规格与土壤接触面积的大小、植物需水状况以及土壤含水量。处理50 d后，刺槐、侧柏和国槐的土壤含水量分别维持在9.1%～12.2%、9.3%～12.1%和6.8%～11.6%，不浇水的对照土壤含水量仅为0.6%～0.9%，已处于严重的干旱状态；处理50 d后，刺槐、侧柏和国槐的释水总量分别为3 345、2 849、2 122 g，分别为正常浇水量的28.3%、23.3%和17.5%。说明在干旱条件下使用控水袋可明显改善土壤水分状况，减轻水分胁迫，且使用控水袋后能达到很好的节水目的。 

Water-releasing regulations and characteristics of energy-free water-controlled bag

The water-releasing regulations of water-controlled bag were studied by pot method in greenhouse.The water-controlled bag can persistently provide water to plants by the principle of energy-free pump and release water by a water-controlled head.The results show that the water-releasing quantity of water-controlled bag was mainly decided by the contact areas between pump and soil,the water requirement of the seedlings and soil water content.After 50 days,the soil water contents of Robinia pseudoacacia,Platyc...