摘要
为探讨播期对桂中地区晚稻生长发育及产量的影响,以野香优莉丝为晚稻试验材料,于2022 年在广西柳州市郊沙塘镇沙塘村进行分期播种试验,共设置4 个播期,比较了不同播期下晚稻的发育期、株高、干物重及产量的差异性.结果表明:在前期营养阶段,S1-S4 所需时间基本相同,在生殖阶段,S3、S4 需时较S1、S2 明显变长;S1、S2 的株高和地上总干物重明显高于S3、S4,S1、S2 的产量因素明显优于S3、S4;然而,S1、S2 生长发育及产量形成的各项指标差异不明显.桂中地区晚稻于 7 月上、中旬播种生长发育及产量差异不大,但在7 月下旬播种生长发育较差,产量偏低,甚至有可能绝收,为充分利用光温资源,缓解双抢压力,晚稻在桂中地区于7 月中旬播种较佳.
Abstract
To investigate the effect of sowing dates on the growth,development,and yield of late rice in the central Guangxi region,the experiment was conducted using the late rice variety"Yexiang Youlisi"in the suburb of Shatang Town,Liuzhou City in 2022.Four sowing dates were set,and the differences in the developmental stages,plant height,dry weight,and yield of late rice under different sowing dates were compared.The results showed that during the early nutritional stage,the time required for S1-S4 was basically the same.During the re-productive stage,the time needed for S3 and S4 was significantly longer than that for S1 and S2.The plant height and aboveground dry weight of S1 and S2 were significantly higher than those of S3 and S4,and the yield factors of S1 and S2 were significantly better than those of S3 and S4.However,the various indicators of growth,development,and yield formation for S1 and S2 showed no significant differences.In the central Guangxi region,there was little difference in the growth,development,and yield of late rice sown in mid to late July,but there was poorer growth and development,and lower yield when sown in late July,and there was even a possibility of complete crop failure.To make full use of light and temperature resources,and alleviate the pressure of simulta-neous harvesting and planting of double cropping rice,mid-July is the optimal sowing period for late rice in the central Guangxi region.
基金项目
中国气象局发展创新专项(CXFZ2022J051)
NETL
NSTL
万方数据