行距与氮肥或甲哌鎓化控对棉花冠层结构、温度和相对湿度的影响

颜为, 李芳军, 徐东永, 杜明伟, 田晓莉, 李召虎

Effects of row spacings and nitrogen or mepiquat chloride application on canopy architecture, temperature and relative humity in cotton

YAN Wei, LI Fang-Jun, XU Dong-Yong, DU Ming-Wei, TIAN Xiao-Li, LI Zhao-Hu

表4 行距和施氮量对2016-2018年棉花不同生育时期叶倾角(MTA)的影响

Table 4 Effect of row spacing and nitrogen rate on MTA during 2016-2018 growing seasons in cotton

处理Treatment 2016 2017 2018 蕾期 Squaring stage (6/23) 初花期 Early blooming stage (7/1) 盛花期 Full blooming stage (7/15) 盛铃期 Boll-fill- ing stage (8/1) 吐絮期 Boll-open- ing stage (9/18) 蕾期 Squaring stage (6/18) 初花期 Early blooming stage (7/3) 盛花期 Full blooming stage (7/14) 盛铃期 Boll-fill- ing stage (8/1) 吐絮期 Boll- opening stage (9/20) 初花期 Early blooming stage (6/29) 盛花期 Full blooming stage (7/12) 盛铃期 Boll-fill- ing stage (7/29) 吐絮期 Boll-open- ing stage (9/12) 行距 Row spacing (R) (cm) 76 39.6 b 41.4 a 44.4 a 44.5 a 45.0 a 44.9 a 50.5 b 45.7 a 42.9 b 49.8 a 44.2 a 49.1 a 52.9 a 50.0 a 92 44.8 a 41.4 a 46.3 a 44.4 a 44.3 a 37.6 a 53.4 ab 45.9 a 44.2 a 48.3 a 44.4 a 49.6 a 52.2 a 50.4 a 102 40.7 ab 40.6 a 46.5 a 44.4 a 44.2 a 37.2 a 55.3 a 48.0 a 45.1 a 47.5 a 45.5 a 52.1 a 50.3 a 47.7 a 氮肥 Nitrogen (N) (kg hm-2) 0 41.5 a 41.3 a 46.4 a 44.1 a 44.7 a 40.1 a 52.4 a 48.0 a 44.9 a 51.1 a 44.2 a 50.3 a 54.7 a 48.7 a 105 40.5 a 41.2 a 47.3 a 44.7 a 44.1 a 39.9 a 52.9 a 45.8 a 43.9 a 48.0 b 45.4 a 50.8 a 50.5 a 50.3 a 210 43.1 a 40.8 a 44.7 a 44.5 a 44.6 a 39.7 a 53.8 a 45.8 a 43.5 a 46.6 b 44.4 a 49.7 a 50.1 a 49.0 a 变异来源 Source of variation R 0.027 0.672 0.168 0.962 0.747 0.153 0.049 0.275 0.013 0.320 0.903 0.268 0.642 0.443 N 0.370 0.874 0.185 0.670 0.876 0.996 0.738 0.321 0.169 0.019 0.912 0.865 0.230 0.756 R×N 0.259 0.344 0.692 0.772 0.027 0.638 0.374 0.172 0.406 0.563 0.203 0.311 0.959 0.349