摘要
以新大豆1号为供试品种,研究了超高产大豆在不同种植密度下的植株性状以及叶面积指数、光合势、干物质积累、光合生产率的动态及其与经济产量的相关关系。结果表明:收获株数在28.87万株/hm2时,产量达到5695.2 kg/hm2;叶面积指数在出苗后84 d达到最高,为5.29,总光合势达到2602 269 m2.d/hm2;光合生产率在出苗后105 d达到最大,为5.19 g/m2.d。新大豆1号在较低种植密度条件下,生长前期各项主要群体生理参数均优于较高种植密度;初花期和盛花期的叶面积指数、光合势和作物生长率与经济产量具有显著的相关性。
The changes of plant height, leaf area index, dry matter accumulation, crop growth rate and the correlation between those colony parameters and seed yield were studied in this experiment. The results indicated that the yield reached to the highest, 5 695. 2 kg/hm^2, with the planting density of 288 700/hm^2. The biggest leaf area index was gained after 84 days of emergence while the leaf area duration was 2 602 269 m^2 · d/hm^2. The net photosynthetic rate was 5.19 g/m^2 ·d after the 105 days of emergence, which was the biggest in the whole growth period. The results also showed that those main colony physiological parameters of Xindadou 1 in the early growth period were superior to that in the later. There were significant correlativities between most of parameters in the period of beginning bloom and full bloom.
出处
《中国油料作物学报》
CAS
CSCD
北大核心
2007年第3期272-276,共5页
Chinese Journal of Oil Crop Sciences
基金
国家863"大豆超高产栽培技术研究"课题攻关(2001BA507A05-02-05)
关键词
大豆
超高产
群体生理参数
经济产量
Soybean
Super high-yield
Canopy physiological parameter
seed yield
