红麻光合特性和干物质生产的品种间差异的初步研究 Ⅰ.净同化率

利用盆栽和大田试验在不同生长季节、不同生长期测定30多个红麻品种的净同化率.结果表明,品种间净同化率存在显著差异;目前大面积种植的两个品种的净同化率接近于所测品种的平均值;不同季节测定的净同化率显著正相关,且表明有相似的遗传力;苗期与生长中期的净同化率显著正相关。因此,可以认为在不同季节性气候条件下以及在苗期和生长中期都可能根据净同化率测定值选择和鉴定具较高光合能力的品种或品系,且有可能找出净同化率比目前大面积种植的品种高的品种或品系。

STUDY ON VARIETAL DIFFERENCE OF PHOTOSYNTHETIC CHARACTER AND DRY MATTER PRODUCTION IN KENAF (HIBISCUS CANKABINUS L. ) I. NET ASSIMILATION RATE

The net assimilation rate (NAR) of more than 30 varieties of kenal (Hibiscus cannabnns L. ) was measured in different growing seasons and growing stages under pot culture and field condiction. The results indicated that, the significantly varietal difference in NAR is found; the NAR of two varieties cultivated in larger acreage recently is in the proximity of the average NAR -value of all varieties used in this experiment ; the NAR of varieties in two growing seasons show a positive correlation and a similar heritability; and that a positive correlation is found in NAR between seedling and mid -growing stage. Therefore, it is possible to select and identify the high - photo synthesis - potential varieties or genotypes according to their NAR value either in different growing stages or in different growing seasons. Moreover, it is possible to find out the varieties or genotypes which are higher in NAR than the varieties cultivated in larger acreage recently.