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对新疆沿天山一带高产油葵群体光合特性的初步研究结果表明 :油葵群体光合日变化呈单峰曲线 ,峰值一般出现在 1 2∶0 0～ 1 3∶0 0 ,光合持续时间为 1 3h。不同叶层的透光率以中上层叶片较大 ,且对光合产物的贡献率达 85 %。对比春播与夏播油葵的群体光合 ,春播高于夏播 ,故表现出春播油葵的生殖器官干物质积累速率 ,灌浆速率及产量分别比夏播高出 2 9.7%、5 .6 %及 1 0 .6 %
The preliminary study on the photosynthetic characteristics of high yield oil sunflower population along the Tianshan Mountains in Xinjiang showed that the daily variation of photosynthetic rate of oil sunflower population showed a single peak curve with peaks at 1 2:0 0 ~ 1 3:0 0 and photosynthetic duration of 13 h . The light transmittance of different leaf layers in the upper leaves larger, and contribution to photosynthetic products up to 85%. Compared with the spring seeding and summer seeding sunflower population photosynthesis, spring sowing higher than summer sowing, it shows spring oil sunflower reproductive organs dry matter accumulation rate, filling rate and yield were higher than the summer sowing 2 9.7%, 5.6% and 1 0 .6%