At the prosperous bud stage, NPR before 14:00 in a day was more than that after 14:00, but at flower or boll stage, NPR before and after 14:00 had little difference.

• 盛蕾期14：00后的净光合速率较14：00前小，高峰值多大于花铃期，而花铃期14：00前后净光合速率无明显差异。