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利用盆栽试验研究了夏谷单株在不同生育期的氮、磷、钾矿质营养元素在不同器官中的分配与转移规律。结果表明,苗期根中氮、磷、钾的分配比率均在65％～75％,拔节后逐渐下降,至成熟期仅为3％～5％。抽穗开花后,穗中养分含量急剧增加,其中96％的氮增量、48.2％的磷增量和全部的钾增量可通过营养器官的养分运转来获得。叶片与叶鞘的氮磷素运转率与运转量均最高。叶片中的钾从开花期开始明显减少,根与叶鞘中的钾前期最多,以后逐渐减少,部分被排出体外。收获时分配于穗部的氮、磷、钾分别占全株总量的68.39％、67.95％和24.91％,茎秆中的钾占总量的36.33％。
The pot experiment was conducted to study the distribution and translocation of N, P and K mineral nutrients in different organs of summer rice at different growth stages. The results showed that the distribution ratios of nitrogen, phosphorus and potassium in seedling roots were between 65% and 75%, decreased gradually after jointing and reached only 3% to 5% in mature period. After heading and flowering, the nutrient content of spike increased sharply, of which 96% nitrogen increment, 48.2% phosphorus increment and total potassium increment could be obtained by nutrition operation of vegetative organs. Nitrogen, phosphorus and leaf turnover rates and leaf turnover rate were the highest. Potassium in leaves from the beginning of flowering significantly reduced, root and leaf sheath in the early period of potassium, and then gradually reduced, some were excreted. Nitrogen, phosphorus and potassium were distributed in the ear at the time of harvest, accounting for 68.39%, 67.95% and 24.91% of the total amount of the whole plant, and the amount of potassium in the stem accounted for 36.33% of the total.