DPC+化学封顶对不同施氮量下棉花叶片光合生理特性的影响

时晓娟, 韩焕勇, 王方永, 郝先哲, 高宏云, 罗宏海

Effects of chemical topping with fortified mepiquat chloride on photosynthetic characteristics of cotton leaves under different nitrogen rates

Xiao-Juan SHI, Huan-Yong HAN, Fang-Yong WANG, Xian-Zhe HAO, Hong-Yun GAO, Hong-Hai LUO

表2 DPC+剂量对不同施氮量下棉花ФPSII的影响

Table 2 Effects of chemical capping on cotton ФPSII under different nitrogen rates

处理 Treatment 2013 2014 盛花期 Full flowering 盛铃期 Full boll 吐絮期 Boll opening 盛花期 Full flowering 盛铃期 Full boll 吐絮期 Boll opening N1 0.49 a 0.38 a 0.32 b 0.36 c 0.29 c 0.16 c N2 0.57 a 0.43 a 0.36 a 0.50 a 0.35 a 0.26 a N3 0.49 a 0.38 a 0.34 ab 0.47 b 0.31 b 0.22 b P1 0.50 a 0.40 a 0.35 a 0.45 b 0.31 b 0.22 b P2 0.52 a 0.39 a 0.34 a 0.47 a 0.35 a 0.22 b P3 0.52 a 0.39 a 0.33 a 0.43 bc 0.31 b 0.16 c P0 0.53 a 0.40 a 0.35 a 0.41 c 0.29 b 0.25 a N1P0 0.51 abc 0.38 a 0.33 a 0.33 ef 0.26 f 0.20 ef N1P1 0.61 abc 0.42 a 0.37 a 0.43 cd 0.34 b 0.30 b N1P2 0.44 abc 0.34 a 0.32 ab 0.36 e 0.31 cd 0.09 h N1P3 0.39 c 0.33 a 0.28 b 0.30 f 0.25 f 0.05 i N2P0 0.63 ab 0.42 a 0.37 a 0.47 bc 0.33 bc 0.30 b N2P1 0.46 abc 0.40 a 0.34 a 0.51 b 0.31 bcd 0.19 fg N2P2 0.68 a 0.43 a 0.37 a 0.59 a 0.41 a 0.34 a N2P3 0.52 abc 0.41 a 0.37 a 0.42 d 0.34 bc 0.21 de N3P0 0.42 abc 0.38 a 0.35 a 0.43 cd 0.29 de 0.24 c N3P1 0.43 bc 0.34 a 0.33 a 0.41 d 0.27 ef 0.17 g N3P2 0.44 abc 0.37 a 0.34 a 0.47 bc 0.32 bcd 0.23 cd N3P3 0.64 ab 0.40 a 0.37 a 0.57 a 0.34 b 0.23 cd N ns ns * * * * P ns ns ns * * * N×P * ns * * * *