摘要
通过不同稻作生态环境(热带、亚热带)条件下,不同类型水稻品种的产量及产量构成因素的比较分析,结果表明导致云南水稻高产的主要因子是单位面积上颖花量较多。无论与热带还是亚热带不同稻区相比,云南都具有较高的颖花量。与热带的IRRI相比,云南稻区能同时提高水稻的穗粒数和有效穗,达到提高颖花量;而与亚热带的杭州相比,云南主要通过增加有效穗,同时提高穗粒数来提高颖花量。不同生态条件下结实率和千粒重的变化较小。云南水稻增产的主要因子是穗粒数和有效穗,其次是结实率,单位面积的颖花量是导致产量差异的主要原因。
Experiments were conducted at tropic (IRRI) and subtropical environment (Taoyuan Township, Yongsheng County, Binchuan County, Yunnan province and Fuyang county, Zhejiang province) from 1995 to 2000. The yield and its components of several varieties were compared. The most efficiency factor of high yield of rice was huge spikelets per unit field. Compared with IRRI and Fuyang, rice plant could produce more grain when planted at Taoyuan or Binchuan through increasing panicle per unit field or spikelets per panicle. The variation of seed weight and seed setting rate were puniness under different environments. The spikelets per unit field were the main reason of different yield. The efficiency of yield components for yield were spikelets per panicle > panicles per unit field > seed setting rate > seed weight.
出处
《西南农业学报》
CSCD
2004年第B05期35-39,共5页
Southwest China Journal of Agricultural Sciences
关键词
生态条件
水稻
产量
云南
穗粒数
品种
rice
high yield
yield components
different environments
