关键词: 连作晚稻, 产量, 种植, 浙江

Abstract: More than 123 farmers’ fields planted with various yield levels of late rice were targeted for survey in 2008 in Yuyao，Ruian and Quzhou. The three main varieties there were Ning3-88，Xieyou92 and Tianyouhuazhan. The main cultivation patterns were throwing，machine-transplanting and hand-transplanting. The yield and its components of samples with different yield level were investigated. The results showed that the average output per mu of later rice was 445.2 kg，and yield gap between the max yield and the min yield was more than 300 kg. The yield was positively and significantly correlated with spikelet number and effective panicle number. The effective panicle number and higher spikelet fertility should be ensured for transplanting rice，and the spikelet number was very important for throwing seedling. When the rice was transplanted by machine，it was important to improve the 1000-grain weight on the basis of enough effective panicle number.

Key words: later rice, yield, plant model, Zhejiang Province