玉米株型与群体光合作用的关系研究

Studies on Relationship between Plant Type and Canopy Photosynthesis in Maize

通过人工改型的办法测定5种不同密度下的群体光合速率.结果表明,同一基因型的不同株型对玉米群体光合速率有显著的影响,特别是高密度下影响更明显.改为紧凑株型后的最高群体光合速率及其最适密度高于平展型,平均群体光合速率改为紧凑型比改为平展型的高19.09%.玉米最佳茎叶夹角为10°,最适叶向值为64.63.

The plant-type was proved to be a more important element for canopy photosynthesis of maize by artificially altering plant-type. The maximum canopy photosynthetic rate (CPR) and the optimum density of the compact type were higher than those of the horizontally spreading type. The average CPR of compact type was 19.08% more average CPR than that of the horizontally spreading type in whole day. The best plant-type of maize was determined the optimum angle between leaf and stem was 10°, and the optimum leaf orientation value was 64.63.