开封引黄灌区灌溉条件下稻田土壤盐分阈值研究

结合各生育期水稻耐盐度、各处理实际种前初始土壤含盐量和对应生育期最高的土壤含盐量,分析了各灌溉处理条件下的稻田土壤含盐量在水稻各生育期的动态变化规律和允许初始土壤含盐量阈值.结果表明:控制灌溉及控制灌溉加淋洗条件下,各水稻生育期土壤含盐量均有不同程度降低,随着淋洗水量的增加土壤含盐量逐渐降低,并获得了不同灌溉方式下的允许稻田初始土壤含盐量阈值.此结论对实际应用有指导意义.

Study on Threshold Values of Soil Salinity in Rice Field Under Different Irrigation Conditions

Combined with the salt-tolerant degree of every rice growing period, the actual initial soil salinity before planting rice using every processing methal,and the corresponding highest soil salinity of the corresponding growth period of rice,the dynamic changes laws and the tolerant initial soil salinity threshold of rice fiold were studied in every rice growth period under eveng irrigation processing condition.The results show that,the soil salinity of every rice growth period has decreased with different degree,with raising the pouring-washing water,the soil salinity decreases little by little,and the ,threshold values of original soil salinity of rice is acquired.This has some reference significance for actural application.