北方高渗漏稻田阻渗节水效果

为了减少北方高渗漏稻田的过量水分流失,利用2001～2002年在中国科学院沈阳生态实验站水田试验基地开展的稻田土壤阻渗试验,分析了四种处理(包括对照、薄膜阻渗、厚膜阻渗和犁底层夯实阻渗处理)的阻渗效果。结果表明．与对照处理相比,厚膜和夯实两种处理均表现出良好的阻渗效果,节水量在400～500mm之间,节永达50％以上。为了有效指导开展北方节水稻作,在最后指出今后在水稻生产中应注意的一些问题。

Effect of field anti-percolation practices on water saving in a high percolation paddy field in North China

To reduce the high percolation amount in a paddy field in North China, a field experiment was conducted at the Shenyang Experimental Station of Ecology, Chinese of Sciences from 2001 to 2002, to study the effect of field anti-percolation practices on water saving with four treatments including the CK, thin and thick polyethylene film anti-percolation and subsoil compaction treatments. Results indicate that compared with the CK treatment, there had got a significant water saving in the thick polyethylene film and subsoil compacting treatments with water-saving amounts of 400~500mm, and the percentage of water saving of more than 50%. In order to guide effectively to develop water-saving cultivation in paddy field in North China, some problems to which should be paid attention in practice are pointed out at the end of this paper.