暗管排水治理渍害田初探

暗管排渍改良低产稻田的试验结果表明,暗管排水显著降低地下水埋探,提高了土壤通透性,减少了土壤中的有毒物质,改善了水稻生长的土壤环境。在宾阳试区和环江试区采用不同水稻品种试验结果表明。与改良前的1989年相比,分别增产53.8％和36.5和36.5％;比同年农艺措施相同的明沟排水田分别增产11.15％和19.93％。

AMELIORATION OF WATERLOGGING PADDY FIELD BY CLOSED DRAINAGE

This paper deals with the amelioration of waterlogging paddy field by closed drainage. The results indicated that the level of groundwater can be notably lowered, the perviousness of soil can be increased, the toxic substances in soil can he reduced, and soil environment improved. The experiments with different variety of rice in Binyang and Huanjiang showed that the average output of rice increased by 53.8% and 36.5% respectively, compared with that in 1989 before closed drainage was applied; or increased by 11.15% and 19.9% respectively if compared with that of open ditch drainage under the same agroteehnical measures in the same year. So the closed drainage is an effective way to ameliorate waterlogging, low-productive paddy fields.