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应用~(32)p示踪盆栽试验和室内化学分析,对3种类型酸性水稻上的供磷能力与磷肥吸收利用进行了研究。结果表明:土壤有效磷“A”值与Al—Abbas法速效磷达极显著正相关,同时“A”值与水稻主要磷源磷酸铁测得值很相近,表明两法均可作为水稻土供磷能力的指标;在供磷比较充足的水稻土上,施用磷肥,水稻增产不显著或不增产;水稻各生育期稻株所吸收的磷主要来自土壤,占稻株总吸磷量的80—90％;在盆栽条件下,土壤速效磷利用率平均38％,过磷酸钙利用率平均22％;不同磷源在水稻体内分配规律是一致的,绝大部分磷积累在子粒中,茎叶和根中很少。
The application of ~ (32) p tracing pot experiment and laboratory chemical analysis were carried out to study the phosphorus supply ability and phosphate fertilizer utilization of three types of acid rice. The results showed that there was a significant positive correlation between soil available phosphorus “A” value and Al-Abbas fast-available phosphorus, and the value of “A” was similar to that of main phosphate source of iron phosphate, indicating that both methods could be used as paddy soil Phosphorus ability index; Phosphate fertilizer adequate in paddy soil, the application of phosphate fertilizer, rice yield increase is not significant or not increase; Rice growth period of rice plants absorb phosphorus mainly from the soil, accounting for total phosphorus uptake of 80- 90%. Under potted condition, the availability of available phosphorus in soil was 38% on average and the utilization of superphosphate was 22% on average. The distribution of different phosphorus sources in rice was consistent, most of the phosphorus accumulated in the seeds, Few roots.