根系氧化力不同的水稻品种磷锌营养状况的研究

采用琼脂培养和土壤培养试验研究了根系氧化能力不同的水稻品种磷、锌的营养状况。 结果表明, 在选用的 5 个水稻品种中, 根系氧化力较高的品种 LR-2、TZ88-145 和 YY-1, 其根表铁膜数量明显高于根系氧化力较弱的品 种KZ89-113 和KZ89-112。 根系氧化能力高, 根表形成的铁膜数量多, 富集的磷、锌数量也多, 反之则少。 这就构成 了“ 根系氧化力不同的水稻品种—根表形成的铁氧化物胶膜数量不同—富集在铁膜上的磷、锌数量不同—水稻的 磷、锌营养状况不同” 的连锁关系。

The nutritional status of P and Zn on rice cultivars with different oxidizing power of roots

Results of agar culture and soil culture indicated that the amounts of plaque iron on rice cultivars with different oxidizing power of roots were different. Rice cultivars with high oxidizing power of roots, such as LR-2,TZ88-145 and YY-1,formed much more plaque on roots than cultivars with low oxidizing power of roots, such as KZ89-113 and KZ89-112. The amounts of P and Zn accumulated in plaque of rice cultivars with high oxidizing power of roots were more than cultivars with low oxidizing power of roots, which caused that nutritional status of P and Zn in the rice cultivars with high oxidizing power of roots were better than that of cultivars with low oxidizing power of roots.