水氮耦合对直播早籼稻苗期低温冷害的调控效应

王文霞, 吴自明, 曾勇军, 潘晓华, 石庆华, 曾研华

Regulatory Effects of Water-Nitrogen Coupling on Low Temperature Chilling Damage of Direct-Seeded Early Indica Rice at Seedling Stage

Wang Wenxia, Wu Ziming, Zeng Yongjun, Pan Xiaohua, Shi Qinghua, Zeng Yanhua

表1 水氮耦合对直播早籼稻苗期低温冷害农艺性状的影响

Table 1 Effects of water-nitrogen coupling on agronomic characteristic of direct-seeded early indica rice under low temperature chilling damage condition at the seedling stage

品种 Variety 处理 Treatment 苗高 Seedling height (cm) 根数 Root number 最大根长 Maximum root length (cm) 鲜重 Fresh weight (mg/100 plants) 干重 Dry weight (mg/100 plants) 叶长Leaf length (cm) T1 T2 T3 湘早籼6号 Xiangzaoxian 6 CK 35.2a 12.7b 3.2c 283.3a 48.3b 2.5c 10.2bc 21.3bc LT-0N 27.4d 9.7d 1.8e 195.7f 38.8d 2.3d 9.3d 19.5d LT-LN 28.5cd 11.3c 2.3d 235.7de 44.3c 2.5bc 10.7ab 20.8c LT-HN 30.2bc 13.3ab 2.4d 257.7bc 48.3b 2.6bc 11.0ab 21.6bc LTF-0N 28.3cd 10.0d 2.4d 220.3e 42.7c 2.6bc 9.7cd 20.8c LTF-LN 32.1b 14.3a 4.1a 274.7ab 50.5ab 2.8b 11.1a 23.0a LTF-HN 28.9cd 12.3bc 3.9b 252.0cd 52.9a 3.1a 9.4d 22.2ab 中嘉早17 Zhongjiazao 17 CK 31.6a 12.0c 3.2ab 275.0ab 43.2bc 2.5bc 9.9bc 19.5bc LT-0N 25.7d 9.7d 1.6d 231.0d 40.7c 2.0d 8.9d 17.1e LT-LN 27.8c 13.0bc 2.2c 259.3bc 42.5bc 2.2d 10.4bc 19.1cd LT-HN 30.3ab 15.0a 2.9b 288.3a 50.9a 2.4bc 11.0ab 20.3b LTF-0N 28.9bc 11.7c 2.3c 241.3cd 47.7ab 2.4c 9.4cd 18.3d LTF-LN 31.1a 15.3a 3.2ab 277.7ab 51.3a 2.6ab 10.4bc 19.5bc LTF-HN 31.3a 14.0ab 3.4a 266.7ab 52.1a 2.7a 11.5a 21.5a V 2.5 15.5** 13.7** 25.9** 0.2 24.7** 0.0 140.8** T 24.3** 28.8** 112.5** 31.5** 26.6** 19.3** 11.1** 27.5** V×T 4.1** 2.0 8.3** 3.0* 3.4* 1.3 5.8** 4.0**