摘要
以汕优 63和武育粳 3号为材料 ,分析不同环境条件下旱育秧苗生长状况 ,研究多水寡照条件下旱育秧秧田最佳播量和不同播量的最适秧龄 ,探讨特殊气候条件下秧田壮苗技术。结果表明 :多水寡照对旱育秧秧苗素质影响较大 ,表现为茎蘖滞增叶龄期变小 ,移栽适期提前。在江苏里下河地区 ,旱育秧田播量中籼杂交稻以 30～ 4 0 g/ m2 、粳稻以 50～70 g/ m2较为适宜。多水寡照旱育秧秧田期使用高吸水种子包衣剂或水稻秧苗健壮素 ,苗高、单株次生根数、单株叶面积、发根力、单株干物重等主要秧苗素质指标达到或接近常规旱育秧 。
Shanyou 63 and Wuyujing 3 were employed in this experiment to investigate the effects of some special environmental conditions on growth status of dry raised rice ( Oryza sativa L.) seedlings. The optimum sowing norm under the condition of more water and less sunlight radiation and the optimum seedling age for transplanting under different sowing norm were also studied. The result obtained showed that more water and less sunlight radiation treatments resulted in the decrease of leaf age for stagnant increase of stems and tillers and earlier seedling age suitable for transplanting. According to the local weather condition, the optimum sowing norm of Japonica and hybrid Indica rice on the dry raising bed was 50~70 and 30~40 g/m 2, respectively. Seedling quality under the condition of more water and less sunlight radiation could be improved obviously by using seed coating material with high water absorbing capacity and using seedling strengthening agents.
基金
江苏省"九五"重点攻关项目! (BE96 3181)
