播期对直播水稻产量、花后各器官干物质和氮素积累及转运的影响

孙琪, 耿艳秋, 金峰, 刘丽新, 郑浣彤, 郭丽颖, 邵玺文

Effects of Sowing Dates on Yield, Dry Matter and Nitrogen Accumulation and Translocationin Organs after Anthesis of Direct Seeding Rice

Sun Qi, Geng Yanqiu, Jin Feng, Liu Lixin, Zheng Huantong, Guo Liying, Shao Xiwen

表5 播期对直播稻抽穗至成熟期各器官氮素转运的影响

Table 5 Effects of sowing date on nitrogen translocation in stem-sheath and leaves of direct seeding rice from the heading to maturity stage

年份 Year	品种 Cultivar	播期 Sowing date	茎鞘Stem-sheath		叶片Leaf		穗部氮增加量 Increase of nitrogen in panicle (kg/hm²)	氮素转运对穗部的贡献率 Contribution of nitrogen translocation to panicle (%)
年份 Year	品种 Cultivar	播期 Sowing date	转运量 Translocation amount (kg/hm²)	转运率 Translocation rate (%)	转运量 Translocation amount (kg/hm²)	转运率 Translocation rate (%)	穗部氮增加量 Increase of nitrogen in panicle (kg/hm²)
2018	白粳1号	SD1	2.97c	14.97b	10.85b	46.03a	38.87b	35.55c
	Baijing 1	SD2	6.44a	27.39a	16.13a	50.53a	44.93a	50.23a
		SD3	5.49b	24.49a	13.47b	49.11a	41.79ab	45.37b
	长白9号	SD1	4.04a	21.00a	10.19c	44.91a	36.37b	39.13b
	Changbai 9	SD2	6.51a	26.65a	14.45a	47.72a	44.63a	46.96a
		SD3	5.57a	25.27a	12.54ab	46.81a	42.14a	42.98ab
	龙粳31号	SD1	4.13a	24.60a	8.55b	42.73b	42.99b	29.50b
	Longjing 31	SD2	5.80a	29.01a	12.72a	48.44a	48.44a	38.23a
		SD3	4.92a	27.56ab	11.57ab	47.44a	45.11b	36.56a
2019	白粳1号	SD1	2.57b	18.01c	5.51a	41.00a	27.74c	29.13b
	Baijing 1	SD2	7.09a	29.69a	8.78a	43.75a	41.24a	38.48a
		SD3	5.06a	25.21b	6.82a	42.79a	34.67b	34.27ab
	长白9号	SD1	3.63b	21.34a	4.98b	46.59a	31.64b	27.21c
	Changbai 9	SD2	6.47a	26.20a	10.96a	50.86a	40.68a	42.85a
		SD3	5.80a	25.15a	6.91b	47.75a	36.97ab	34.38b
	龙粳31号	SD1	3.91c	26.82a	4.13b	40.29b	22.57b	35.62b
	Longjing 31	SD2	6.20a	28.55a	8.06a	47.19a	32.25a	44.22a
		SD3	4.74b	27.21a	6.54ab	42.83ab	30.40a	37.11b