微咸水和再生水对盆栽棉花土壤理化性质和根系的影响

为缓解华北水资源短缺问题,寻求代替水源,进行了微咸水和再生水灌溉条件下不同灌水量对盆栽棉花土壤理化性质和棉花根系影响的试验。试验设置灌水水质和灌水量2个试验因素,灌水水质设计为低、中、高矿化度微咸水和再生水,清水作为对照;灌水量设计为田间持水量的95%、85%、70%、55%。试验结果表明:微咸水和再生水处理增加土壤含盐量,微咸水处理的土壤含盐量随着矿化度的升高而增加;再生水处理提高土壤有机质和硝态氮的含量;微咸水和再生水促进棉花根系的生长,在盐分累积严重的情况下根系生长最快。

Effects of Brackish Water and Reclaimed Water on Soil Physical and Chemical Properties and Root System of Potted Cotton

To alleviate the problem of water shortage in North China,seek instead of water,a test based on different brackish water and reclaimed water irrigation which research soil physical and chemical properties of potted plant cotton and cotton root impact on various irrigation water contents is carried out.Irrigation water quality and irrigation water are set up as two factors in the experi-ment,the quality of brackish water and reclaimed water is designed for low,medium and high salinity which regard water as a con-trol;irrigation water is devised for 95%、85%、70%、55% of field capacity.Experimental results show that the treatment of Brackish water and reclaimed water can increase the salinity of the soil;soil salt content treated by Brackish water increases with the increase of salinity;reclaimed water treatment can improve the content of soil organic matter and nitrate nitrogen;Brackish water and re-claimed water can promoted the growth of cotton root and the root system growing fastest under salt accumulation.