浙江省连作晚稻产量水平及其种植差异分析

2008年调查了浙江省余姚市、瑞安市和衢州市衢江区连作晚稻，主要品种有宁3-88、协优92和天优华占。栽插方式主要为抛秧、机插和手插3种方式，按不同产量水平选取代表样点，调查和测定不同产量水平的产量结构，共123个调查点。结果表明：晚稻平均单产为445.2 kg/667m²，最高产量和最低产量差异超过300 kg/667m²，有效穗数和穗实粒数与产量呈极显著正相关。移栽稻提高产量应保证足穗和结实率；抛秧应提高每穗实粒数；机插秧则应在保证穗数的基础上，提高千粒重。

Analysis of planting model and yield gap of later rice in Zhejiang Province

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.