摘要
春优658在浙西南山区作单季晚稻种植，5月20日-6月9日播种均可正常抽穗结实，以5月30日播种产量最高，5月20日播种产量最低，5月30日、6月4日、6月9日、5月25日四期播种产量间不存在显著差异，但5月30日、6月4日、6月9日三期播种产量与5月20日播种产量存在显著差异。春优658每期播种产量均高于对照，五期播种平均产量达7441．5kg·hm-2，高于对照7．45％，与对照存在极显著差异。试验表明：春优658具有产量高、结实率高、植株矮、穗大粒多、经济系数高的优势，适宜在浙西南山区种植。但应根据当地实陆军掌握适期播种，秧龄以25—30天较宜。
Chunyou 658 in Western Zhejiang Nanshan District for a single season rice planting, 5/20-6/9 sow-ing can be heading and filling, to 5/30. The highest yield, seed yield was lowest in 5/20, there was no significant difference of 5/30, 6/4, 6/9, 5/25 four seed yield, but there were significant differences in 5/30, 6/4, 6/9 three seed yield and 5/20 seed yield. Chunyou 658 each seed yield was higher than that of the control, the average yield of five sowing was 7441.5/hm2, higher than that of the control 7.45%, there was significant difference with control. Experiments show that： Spring 658 with high yield, high seed setting rate, plant height, big panicle, high eeonom- ic efficiency advantages, suitable for planting in Western Nanshan District, the sowing date in May 30-6 month 4 days, seedling age of 25-30 days 4s appropriate.
