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为明确杂交稻机插适宜取秧量,选取大面积种植的杂交稻品种Y两优1号及中浙优1号为材料,设置2、4、6、8、10档5个机插取秧量,研究其对杂交稻生长及产量的影响。结果表明,随着机插取秧量的增大,杂交稻机插质量明显上升,漏秧率显著减小,田间基本苗数及群体茎蘖数均有所增加。同时,机插取秧量的增大引起植株群体干物质积累量增加,但其干物质主要集中在茎叶部位,穗部干物质积累量没有明显提高。从最终产量表现来看,随着机插取秧量的增大,产量呈先上升后下降的趋势,较小的取秧量导致田间水稻有效穗数不足,而较大的取秧量则降低了水稻结实率。综合两品种试验结果,机插最适取秧量为6档,成穗率高的品种可降至4档。
In order to determine the appropriate seedling yield of hybrid rice plants, we selected 5 hybrid rice varieties Y Liangyou 1 and Zhongzheyou 1 which were grown in large area as material, To study its effect on the growth and yield of hybrid rice. The results showed that the quality of hybrid rice increased significantly with the increase of seedling transplanting capacity, the leakage trapping rate decreased significantly, and the number of basic seedlings and the number of stalks and tillers increased. At the same time, the increase of machine-inserted seedling increased the dry matter accumulation of plant population, but the dry matter mainly concentrated in stem and leaf parts, and the dry matter accumulation of ear did not increase obviously. From the perspective of final yield performance, the yield increased first and then decreased with the increase of machine-inserted seedling volume. The smaller seedling yield led to insufficient number of effective panicles in field and lower seedling yield The rate of rice seed set. Based on the test results of two varieties, the optimum planting capacity is 6 stalls, and the varieties with high spike rate can be reduced to 4 stalls.