播期对江西晚稻产量及温光资源利用的影响

张崇华, 段里成, 王尚明, 张清霞, 王成孜, 吴风雨, 杨林

Effects of Sowing Date on Late-Rice Yield and Utilization of Heat-Light Resources in Jiangxi Province

Zhang Chonghua, Duan Licheng, Wang Shangming, Zhang Qingxia, Wang Chengzi, Wu Fengyu, Yang Lin

表5 播期对双季晚稻温光资源利用的影响

Table 5 Effects of seeding date on accumulative temperatures and light hours of double late-rice

年份 Year 播期 Sowing date 积温Accumulative temperature (℃) 日照时数Light hours (h) 播种―抽穗 Sowing- heading 抽穗―成熟 Heading- maturity 全生育期Growth duration 播种―抽穗 Sowing- heading 抽穗―成熟 Heading- maturity 全生育期Growth duration 总积温 Total accumulative temperature (℃) 利用率 Utilization ratio (%) 总日照时数 Total light hours (h) 利用率 Utilization ratio (%) 2018 Ⅰ 2541.8 972.7 3514.5 100.0 655.8 229.8 885.6 100.0 Ⅱ 2460.4 984.1 3444.5 98.0 622.7 219.6 842.3 95.1 Ⅲ 2272.4 1051.6 3324.0 94.6 587.2 243.5 830.7 93.8 Ⅳ 2266.8 875.9 3142.7 89.4 598.3 208.6 806.9 91.1 2019 Ⅰ 2597.9 916.3 3514.2 100.0 541.2 272.4 813.6 100.0 Ⅱ 2450.8 985.4 3436.2 97.8 534.1 286.5 820.6 100.9 Ⅲ 2347.4 917.6 3265.0 92.9 552.2 236.9 789.1 96.9 Ⅳ 2363.2 806.3 3169.5 90.2 634.2 202.5 836.7 102.8