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采用小区试验 ,在不施磷 (P0 )和施磷 (P1)条件下 ,研究了 2 6个玉米自交系的磷营养效率。结果表明 :供试材料按对磷的吸收效率可划分为高效吸收型、中效吸收型和低效吸收型 ;按对磷的利用效率可划分为高效利用型、中效利用型和低效利用型。研究中发现供试材料中只有极少数属于磷高效型 ,耐低磷条件 ,绝大多数属于磷中、低效型。植株相对磷浓度可作为玉米吸磷效率的指标 ,相对产量可作为其磷利用效率指标
In a plot experiment, the phosphorus nutrient efficiency of 26 maize inbred lines was studied under the condition of no phosphorus (P0) and phosphorus (P1). The results show that the absorption efficiency of phosphorus can be divided into high efficiency absorption type, medium efficiency absorption type and low efficiency absorption type. The utilization efficiency of phosphorus can be divided into high efficiency utilization, middle utilization utilization and inefficient utilization type. The study found that only a very small proportion of the tested materials belonged to the phosphorus-efficient and low-phosphorus-tolerant conditions, and most of them belonged to phosphorus and inefficient types. Plant relative phosphorus concentration can be used as an indicator of phosphorus uptake efficiency of maize, relative yield can be used as an indicator of phosphorus use efficiency