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以液培、土培盆栽法结合大田试验对我国不同时代陕西关中地区的小麦品种进行了有效利用土壤潜在磷特性的鉴定.结果表明:小麦有效利用土壤潜在磷的特性不是随品种的更替而呈递增或递减趋势,新、老品种中均有高效利用土壤潜在磷的基因型;含有异源基因的小麦品种对土壤潜在磷的利用能力较强;土培盆栽法是一个较能代表大田试验的筛选小麦有效利用土壤潜在磷特性的方法,而液培法的干物质重不适用于作为该特性筛选的指标;土培盆栽法中选择压力(即缺磷程度)是筛选成败的关键,3年的试验结果证明,缺磷处理中土壤有效磷在8mg/kg左右是小麦有效利用土壤潜在磷特性筛选的适宜的选择压力.
The soil potential phosphorus characteristics of wheat cultivars in Guanzhong region of Shaanxi in different periods were studied by liquid culture, soil-cultivated pot culture and field experiments.The results showed that the characteristics of potential phosphorus in soil were not changed with the varieties Increasing or decreasing trends, new and old varieties are efficient use of soil potential phosphorus genotypes; wheat varieties containing heterologous genes on soil potential phosphorus utilization ability; soil culture potting method is a representative of field trials Screening wheat effective use of soil potential phosphorus characteristics of the method, and hydroponic dry weight is not suitable for use as an indicator of the characteristics of screening; Soil culture potting selection pressure (ie, the lack of phosphorus) is the key to screening success or failure, 3 years The experimental results show that phosphorus deficiency treatment of soil available phosphorus at about 8mg / kg wheat is the appropriate choice of soil available phosphorus selection potential pressure.