【摘要】 选宝坻区有代表性的潮土、湿潮土共33个样点,采用土壤养分系统研究方法对耕层土壤养分状况进行了调查。结果显示,土壤钾、硫的亏缺成为养分平衡的主要限制因子;部分地区存在锌、铁和锰的亏缺问题。多项试验结果显示,在土壤养分系统分析基础上进行平衡施肥,可实现作物增产13.9%～30.2%,增收1700～5000元/hm2,并在多方面改善了农产品品质。更多还原

【Abstract】 representative samples of Chao soil and Hydric soil in Baodi district were selected to investigate the soil nutrient status in plowed layer soil by means of systematic researching approach of soil nutrient status. The result showed that the deficiency of soil potassium and sulphur became the primary restricted factor to the nutrient- and some problems existed such as the partly deficiency of Zn- Fe and Mn. The results of many trials indicated that carrying out balanced fertilizing on the basis of systematic analysis of soil nutrient is essential to increasing yield 13.9% to 30.2% and improving income 1 700 to 5 000 yuan/hm2- and promote the crops quality.更多还原