期刊论文

中文

湖南农业大学学报(自然科学版)

1007-1032

2006

32

6

581-584

10.3321/j.issn:1007-1032.2006.06.004

2004BA520A01:国家科技攻关计划 2003-01-03B:农业部农业结构调整技术研究专项基金

本校为第一机构

选用有代表性的水稻品种(组合)两优培九(两系杂交稻)、绵2优838(三系杂交稻)、湘晚籼11号(优质常规稻)、扬稻6号(高产常规稻)为试验材料,采用裂区设计,通过直播栽培与育秧移栽比较试验,研究不同水稻品种(组合)农艺性状、产量构成因素的差异.结果表明,两种栽培方式下各品种产量之间存在显著差异,直播栽培相比育秧移栽产量高;从产量构成因素上分析,直播栽培增产的原因是水稻有效穗数增多、结实率和千粒重略有增加,其中有效穗数对产量贡献最大,其直接通径系数为0.867 7.直播栽培对水稻分蘖、株高、生育期及叶面积有一定影响.

Four typical rice varieties （or combinations） were grown under direct-seeding cultivation and transplantation cultivation by split plot design, and the effects of direct-seeding cultivation on agronomic characters, yield components were investigated. The results showed that there were significant differences between yield of different varieties under different cultivations. It increased markedly under direct-seeding cultivation. The main reasons for the yield increasing under direct-seeding cultivation were that there were more effective pani...