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1996～ 1999年对新疆棉花超高产 (皮棉 2 2 50kg·hm-2 以上 )光合性能研究结果表明 ,盛铃期群体光合速率 (CAP)生育期变化为单峰型曲线 ,盛花结铃期达最大值 4 .0 5gCO2 ·m-2 h-1 ,平均值为 2 .63gCO2 ·m-2 h-1 ,盛花、结铃、吐絮期的 CAP 与生物学产量、皮棉产量呈显著正相关。盛铃期叶面积指数最大值为 3 .7～ 3 .9。一天内棉叶净光合时间长达 13 .5h,早晚比普遍棉田光合延长 2 0min左右。未发现光合午休和光饱和现象。高产棉田夜间 (2 1:2 0 )呼吸速率最大值为 4 .33mgCO2 ·dm-2 h-1 ,平均值为 3 .0 0mgCO2 ·dm-2 h-1 ,分别比普通棉田低2 2 %和 17.6 % ,扣除呼吸消耗 ,净光合比普通棉田高 58.4 %。其呼吸消耗占白天总光合的 8.4 %。低于普通棉田 15.5 % ,也低于内地棉区 12 %～ 2 0 %。新疆高产棉田群体的库容量增加 ,光合产物的贮备能力强 ,生物学产量高达 1.14× 10 4～ 1.44× 10 4kg·hm-2 ,有效铃 (5g以上 )高达 12 0×10 4个·hm-2 ,经济系数 41.52 %～ 44 .1% ;单位叶面积的果节数、有效铃、生殖器官干重分别为10 4～ 137个·m-2 ,32～ 49个·m-2 ,0 .2 30 3～0 .3361kg·m-2 。源强库大 ,源库协调是新疆棉花高产的生理基础。
The results of photosynthetic performance of Xinjiang cotton super high yield (2250kg · hm-2 lint cotton) from 1996 to 1999 showed that the peak photosynthesis rate (CAP) The average CAP was 2.63 gCO2 · m-2 h-1, and the CAP, flowering, boll opening and boll opening stages were significantly positively correlated with the biological yield and lint yield. The maximum leaf area index of Shengling period was 3.7 ~ 3.0. Net photosynthetic cotton leaves in a day up to 13.5h, sooner or later than the common cotton field about 20min extension of photosynthesis. No photosynthesis midday break and light saturation were observed. The maximum respiration rate of high-yield cotton field at night (21:20) was 4.33mgCO2dm-2h-1 with the average value of 3.0mgCO2.dm-2h-1, which was 22% lower than that of normal cotton field 17.6%, net of respiratory consumption, net photosynthesis than ordinary cotton high 58.4%. Its respiratory expenditure accounted for 8.4% of total photosynthesis during the day. 15.5% less than normal cotton fields, but also lower than the mainland cotton 12% ~ 20%. The population of high-yielding cotton population in Xinjiang increased, the photosynthate storage capacity was as high as 1.14 × 10 4 ~ 1.44 × 10 4 kg · hm-2, and the effective bell (above 5 g) was up to 120 × 104 hm- 2, economic coefficient 41.52% ~ 44.1%; leaf number per unit area, effective bell, genital dry weight were 104 ~ 137 · m-2, 32 ~ 49 · m-2, 2 30 3 ~ 0.3361 kg · m-2. Source strong library, source library coordination is the physiological basis of Xinjiang cotton yield.