江淮下游不同播期对稻-麦周年作物产量、品质及温光资源利用的影响

陈天晔, 袁嘉琦, 刘艳阳, 许轲, 郭保卫, 戴其根, 霍中洋, 张洪程, 李国辉, 魏海燕

Effects of different sowing dates on crop yield, quality, and annual light-temperature resources utilization for rice-wheat double cropping system in the lower reaches of the Yangtze-Huaihe Rivers valley

Tian-Ye CHEN, Jia-Qi YUAN, Yan-Yang LIU, Ke XU, Bao-Wei GUO, Qi-Gen DAI, Zhong-Yang HUO, Hong-Cheng ZHANG, Guo-Hui LI, Hai-Yan WEI

表4 播期对稻麦周年有效积温资源分配的影响

Table 4 Effect of sowing date on the distribution of accumulated temperature resources of rice-wheat double cropping system

水稻品种 Rice cultivar 水稻播期 Rice sowing date 小麦播期 Wheat sowing date 水稻季Rice season 小麦季Wheat season 周年Annual 有效积温 Accumulated temperature (℃ d) 分配率 Distribution date (%) 有效积温 Accumulated temperature (℃ d) 分配率 Distribution date (%) 周年有效积温 Annual accumulated temperature (℃ d) degree-days (℃·d) 两季比 Wheat season/rice season 南粳9108 Nanjing 9108 R-I W-I 3945.9 a 1969.8 a 34.14 5656.7 a 0.50 W-II 68.38 1886.0 b 32.68 5549.1 b 0.48 W-III — — — — R-II W-I 3827.6 b 1969.8 a 34.14 5678.1 a 0.51 W-II 66.33 1886.0 b 32.68 5570.5 b 0.49 W-III 1824.0 c 31.61 5459.8 c 0.48 R-III W-I 3737.8 c — — — — W-II 64.77 1886.0 a 32.68 5598.7 a 0.50 W-III 1824.0 b 31.61 5536.7 b 0.49 连粳11 Lianjing 11 R-I W-I 3851.9 a 1969.8 a 34.14 5562.7 a 0.51 W-II 66.75 1886.0 b 32.68 5455.1 b 0.49 W-III — — — — R-II W-I 3756.4 b 1969.8 a 34.14 5606.9 a 0.52 W-II 65.10 1886.0 b 32.68 5499.3 b 0.50 W-III 1824.0 c 31.61 5388.6 c 0.49 R-III W-I 3531.7 c 1969.8 a 34.14 5476.4 a 0.56 W-II 61.20 1886.0 b 32.68 5392.6 b 0.53 W-III 1824.0 c 31.61 5330.6 c 0.52