超高产大豆主要群体生理参数与 经济产量关系的研究

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5695.2kg/hm2；叶面积指数在出苗后84天达到最高，为5.29，总光合势达到2602269 m2.d/hm2；光合生产率在出苗后105天达到最大，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。

A study of relation between canopy physiological parameter and seed yield in super high-yield soybean

The objective of study was to determine the changing trends of plant height, leaf area index, dry matter accumulation, crop growth rate and the correlation between those colony parameters and seed yield. The results indicated that the yield reached to the highest, 5695.2kg/hm2, with the planting density of 288700/hm2; the biggest leaf area index was gained after 84 days of emergence while the leaf area duration was 2602269g.m2/hm2; the net photosynthetic rate was 5.19 g/m2.d after the 105 days of emergence, which is the biggest in the whole growth period. The results also showed that those main colony physiological parameters of “Xin Dadou 1” in the early growth period were superior to that in the later. There were significant correlativities between most of parameters in the periods of beginning bloom and full bloom.