蓖麻不同种植密度对群体生育动态的影响

Influence of different planting density on growth and development of canopy dynamics in castor

试验表明，蓖麻在不同种植密度下，株高、叶面积系数、净同化率等均有不同程度的变化，并对群体产量有一定影响。２０００～２１００ｋｇ／ｈｍ２的蓖麻高产群体指标以密度３３０００～４３７００株／ｈｍ２，灌浆成熟期株高２３０～２４０ｃｍ，花果期叶面积系数２．０～２．５，开花期净同化率７．９～８．４ｇ／ｍ２·ｄ为宜。

Experiment results showed: different density of castor had different effects on plant height, LAI and NAR, and had influence on yield. With yield of 2000～2100 kg/hm 2, the most suitable density of castor was 33000～43700 plants/hm 2, plant height was 230～240 cm at filling ripening stage , LAI was 2.0～2.5 at flowering fruiting and NAR was 7.9～8.4 g/m 2·d at flowering stage.