Abstract:

Committed to improving the large-scale popularization and application of super rice mechanized production technology, the experiment was carried out to study different seed dressing treatments on seedling quality of super rice, using Wufengyou 615 as material. The result showed that 4 seed dressing treatments had a significant effect on the seedlings. The seedlings using seed dressing could effectively reduce the height, significantly increased the number of green leaves, leaf age and SPAD value. When seedling age was 28 days, the average stem base width were increased by 8.21%~32.70% compared to CK. The root system of seedling treated by seed dressing was more developed, the white roots and total root number and underground dry weight were improved. The seedling establishment rate were increased by 5.49%~24.73%. In addition, compared with CK, the POD activity, the average free proline content and the soluble protein content were increased by 32.61%, 163.42% and 14.67% respectively. Among them, the effect of B4 treatment was better.

Key words: super rice, seed dressing agent, mechanical transplanting, seedling quality

摘要：

为研究不同拌种剂拌种对超级稻机插秧苗素质的影响，以广东省主推超级杂交稻品种五丰优615为材料，设置了在露白期进行拌种的试验。结果表明，4种参试拌种剂配方对秧苗素质均有显著影响，能有效降低秧苗高度，显著提高绿叶数、叶龄及SPAD值，28 d秧龄时秧苗茎基宽比未用拌种剂拌种的对照增加8.21%～32.70%；与对照相比，经拌种剂处理的秧苗根系发达，白根数、总根数以及地下部干质量均有提高，成秧率提高5.49%～24.73%，有效提高了壮秧指数和苗高干质量；同时，拌种剂处理的秧苗POD活性、游离脯氨酸含量和可溶性蛋白含量比对照平均分别提高了32.61%、163.42%和14.67%。可见，用拌种剂拌种有利于改善机插水稻秧苗素质，提高抗逆能力，其中，以B4配方处理的效果较好。

关键词: 超级稻, 拌种剂, 机插秧, 秧苗素质