氮肥对非充分灌溉下棉花花铃期光合特性及产量的补偿作用

石洪亮,严青青,张巨松,李春艳,窦海涛

Compensation Effect of Nitrogen Fertilizer on Photosynthetic Characteristics and Yield during Cotton Flowering Boll-setting Stage under Non-sufficient Drip Irrigation

Hong-Liang SHI,Qing-Qing YAN,Ju-Song ZHANG,Chun-Yan LI,Hai-Tao DOU

表3 棉花花铃期功能叶(倒三叶) Pn的比较

Table 3 Comparison of functional leaf (third leaf from the top) Pn during cotton flowering and boll-setting stage (μmol m-2 s-1)

灌溉量 Drip irrigation amount 氮肥处理 N treatment 2015 2016 初花期 FP 盛花期 FF 盛铃期 FB 吐絮期 OB 初花期 FP 盛花期 FF 盛铃期 FB 吐絮期 OB 2800 m3 hm-2 N0 32.5 e 35.3 f 28.8 d 15.1 f 31.9 f 33.4 f 25.1 d 5.5 d N150 34.7 d 38.4 d 34.8 c 17.6 de 33.8 de 37.6 de 25.7 d 6.4 cd N300 40.5 ab 45.9 b 44.8 a 22.7 a 40.5 ab 43.9 ab 42.9 a 9.5 a N450 38.2 c 43.1 c 41.8 b 19.9 bc 37.8 c 41.3 c 38.0 b 7.3 bc 3800 m3 hm-2 N0 34.1 d 36.6 e 30.1 d 17.1 e 33.5 e 35.8 e 27.1 cd 7.3 bc N150 35.0 d 38.9 d 35.1 c 18.8 cd 34.8 d 38.8 d 28.1 c 7.7 bc N300 41.6 a 46.8 a 45.8 a 23.4 a 41.2 a 44.6 a 43.6 a 10.3 a N450 39.8 b 43.9 c 42.6 b 20.8 b 39.7 b 42.3 bc 38.6 b 8.8 ab