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预报作物对大气ＣＯ２浓度变化和全球可能变暖的响应，是重要问题。ＣＯ２对作物发育过程的影响，是ＣＯ２和其它主要气候变量对作物发育的相互作用的结果，对此还报道甚少。本项试验的目的是要确定ＣＯ２环境的变化及ＣＯ２与温度间的相互作用对皮马棉发育速度的影响。皮马棉（ＧｏｓｙｐｉｕｍｂａｒｂａｄｅｎｓｅＬ．ｃｖ．ｓ－６）从播种开始就生长于有日光照射的作物生长箱内。白天／夜间气温控制在２０／１２～４０／３２℃，每隔５℃一个处理。白天ＣＯ２保持在３５０或７００μＬＬ－１。在第二个试验中，温度维持在３０／２２℃（白天／夜间），ＣＯ２为３５０、４５０、７００μＬＬ－１。并测定了主茎节发育所需天数、出苗到初现蕾的日数、营养枝和果枝数、座果数、结铃和现蕾数以及为植株所能保持的蕾铃数。发现主茎节的形成速率、现蕾和现花的早晚对大气ＣＯ２浓度不敏感，但对温度很敏感。果枝长出之前节位的发育要比果枝长出之后的节位发育慢。不同ＣＯ２浓度对长出节的快慢没有影响。分枝数目对温度和ＣＯ２都敏感。相比之下，生长在高ＣＯ２下的植株由于提供了一个较大的光合作用汇，其下部果枝上的棉铃数要多些。这也许就是我们观察到生长在高浓度ＣＯ２下的棉株上层节的铃数减少的?
Predicting crop response to changes in atmospheric CO2 concentration and global warming is an important issue. The impact of CO2 on crop development is the result of the interaction of CO2 and other major climate variables with crop development, and little is known about this. The purpose of this experiment was to determine the effects of changes in CO2 environment and the interaction of CO2 with temperature on the development of Pima cotton. Pima cotton (GosypiumbarbadenseL.cv.s-6) was grown in sunlit crop boxes from the beginning of sowing. Day / night temperature control at 20/12 ~ 40/32 ℃, every 5 ℃ a treatment. Daytime CO2 is kept at 350 or 700 μLL-1. In the second experiment, the temperature was maintained at 30/22 ° C (day / night) with CO2 of 350, 450, 700 μLL-1. The number of days required for the development of the main stem, the number of days of emergence to early budding, the number of vegetative and fruiting branches, the number of sessile fruits, the number of bolls and buds, and the number of bolls for the plants were determined. It was found that the formation rate of the main stem node, budding and flowering sooner or later insensitive to atmospheric CO2 concentration, but very sensitive to temperature. The growth of nodes before fruiting branches grow slower than the growth of nodes after fruiting branches grow. Different CO2 concentration has no effect on the length of the festival. The number of branches is both temperature and CO2 sensitive. In contrast, plants grown in high CO2 gave more cotton bolls to the lower branches because they provided a larger pool of photosynthesis. Perhaps this is why we observed a reduction in the number of bolls in the upper stalk of cotton plants grown in high CO2 concentrations.