大豆不同密度对群体结构的影响

The Effect of Different Densities on Population Structure in Soybean

摘要:

本试验研究了大豆3种不同密度下,株高、叶面积指数、净同化率变化规律。研究结果表明:亚有限结实习性大豆品种成熟期最适株高90～95 cm,结荚初期最适叶面积指数为4～4.5,稳定时间40～45 d,净同化率两次高峰期应在开花盛期和鼓粒期,分别为12～14 g/m².d和7～7.5 g/m²·d,适宜密度为20万株/hm²。从中掌握大豆各个时期的丰产长相。

Abstract:

In order to research of the law of change of plant height,leaf area index (LAI)and net assimilation rate (NAR),the semi-determinate soybean cultivars were compared in different density.The results showed the optimum plant density was 2000 000 plant/hm²,plant height was 90~95 cm on maturing,leaf area index of soybean population was 4~4.5 on pod bearing,continuing 45 day, and high net assimilation rate were 12~14 g/m²·d on flowering and 7~7.5 g/m²·d on pob filling.