侧深施氮对水稻产量及氮素吸收利用的影响

doi:10.3724/SP.J.1006.2021.02086

Abstract

Abstract:

Lateral deep fertilization is an efficient, high-quality, and safe cultivation technology of rice mechanical transplanting. In order to improve the technical system of lateral deep fertilization, we investigated the effects of different fertilization methods on rice yield and nitrogen use efficiency under the condition of lateral deep fertilization. In this study, Nanjing 9108 and Nanjing 5718, the representative varieties of quality and delicious rice of Jiangsu, were used as materials. Four different lateral deep fertilization methods were arranged, including 100% base fertilizer side deep application FM1 (fertilization method 1), 70% base fertilizer side deep application + 30% tillering fertilizer FM2 (fertilization method 2), 70% base fertilizer side deep application + 30% panicle fertilizer FM3 (fertilization method 3), and 35% base fertilizer side deep application + 35% tillering fertilizer + 30% panicle fertilizer FM4 (fertilization method 4). In addition, the conventional fertilization method and no nitrogen treatment were added. The effects of different treatments on rice yield, leaf area index, photosynthetic potential, dry matter accumulation, population growth rate, and nitrogen use efficiency were compared. The results revealed that the yield of FM3 and FM4 were higher than those of other treatments. The main reason was that the spikelet number of the population was significantly higher than that of other treatments on the basis of stable panicle number. The leaf area index and dry matter accumulation of FM3 treatment were higher in the middle and late growth stages, especially from heading to maturity stage. Nitrogen accumulation of FM3 was less before jointing stage, but nitrogen accumulation after jointing stage and the total nitrogen uptake during the whole growth period were significantly higher than those of other treatments. Moreover, the nitrogen agronomic utilization rate, nitrogen physiological utilization rate, nitrogen absorption utilization rate, and nitrogen partial productivity of FM3 were significantly higher than those of the other treatments. At the same time, compared with CFM and FM4, FM3 can reduce fertilization times by 1-2 times, save labor and cost, and is conducive to large-scale production. It is a high-yield, simple and efficient fertilization method for rice.

Key words: side deep placement of nitrogen, japonica rice, fertilization methods, yield, nitrogen use efficiency

HUANG Heng, JIANG Heng-Xin, LIU Guang-Ming, YUAN Jia-Qi, WANG Yuan, ZHAO Can, WANG Wei-Ling, HUO Zhong-Yang, XU Ke, DAI Qi-Gen, ZHANG Hong-Cheng, LI De-Jian, LIU Guo-Lin. Effects of side deep placement of nitrogen on rice yield and nitrogen use efficiency[J].Acta Agronomica Sinica, 2021, 47(11): 2232-2249.

Figures/Tables 10

Table 1

Table 2

Table 3

Effects of different fertilization methods on tillering dynamics of rice"

年份 Year	品种 Variety	处理 Treatment	分蘖盛期 Peak seeding stage (×10⁴ hm^-2)	拔节期 Jointing stage (×10⁴ hm^-2)	抽穗期 Heading stage (×10⁴ hm^-2)	成熟期 Maturity stage (×10⁴ hm^-2)	茎蘖成穗率 Percentage of productive tiller (%)
2019	南粳9108 Nanjing 9108	0N	342.20 e	327.37 e	257.53 c	257.43 d	74.54 a
		CFM	515.20 d	503.79 d	355.11 b	353.44 c	68.29 b
		FM1	611.79 a	585.48 a	355.46 b	355.47 c	57.50 c
		FM2	622.08 a	594.71 a	381.68 a	379.14 b	60.13 c
		FM3	589.87 b	580.07 ab	408.13 a	408.34 a	68.12 b
		FM4	569.61 c	555.34 c	396.63 a	394.82 a	65.41 b
	南粳5718 Nanjing 5718	0N	366.13 d	346.88 e	268.24 d	268.41 c	72.64 a
		CFM	534.42 c	512.33 d	368.71 c	366.47 b	67.89 b
		FM1	631.77 a	622.97 a	380.50 b	377.59 b	59.31 c
		FM2	629.59 a	620.22 a	381.83 b	379.71 b	59.67 c
		FM3	604.49 b	597.85 ab	415.67 a	415.21 a	68.05 b
		FM4	589.76 b	567.67 c	410.78 a	408.88 a	68.82 b
2020	南粳9108 Nanjing 9108	0N	340.22 e	323.89 e	257.35 d	257.21 d	71.92 a
		CFM	511.02 d	500.43 d	353.11 c	350.78 c	67.30 b
		FM1	610.85 a	582.14 a	353.26 c	351.25 c	60.75 c
		FM2	618.56 a	590.85 a	377.48 b	376.22 b	60.50 c
		FM3	586.39 b	576.39 ab	402.11 a	400.12 a	67.86 b
		FM4	567.11 c	551.56 c	393.15 a	392.22 a	71.08 a
	南粳5718 Nanjing 5718	0N	361.25 d	343.58 e	264.58 c	264.23 c	76.49 a
		CFM	530.68 c	510.15 d	362.15 b	361.75 b	67.09 b
		FM1	628.55 a	620.05 a	377.22 b	376.19 b	60.44 c
年份 Year	品种 Variety	处理 Treatment	分蘖盛期 Peak seeding stage (×10⁴ hm^-2)	拔节期 Jointing stage (×10⁴ hm^-2)	抽穗期 Heading stage (×10⁴ hm^-2)	成熟期 Maturity stage (×10⁴ hm^-2)	茎蘖成穗率 Percentage of productive tiller (%)
		FM2	627.15 a	615.64 a	379.29 b	378.05 b	61.57 c
		FM3	601.25 b	592.61 ab	411.39 a	410.05 a	68.06 b
		FM4	585.28 b	564.55 c	408.12 a	407.56 a	69.24 b
方差分析Variance analysis		Y	ns	ns	ns	ns	ns
		V	**	*	*	*	ns
		T	**	**	**	**	**
		Y×T	ns	ns	ns	ns	ns
		Y×V	ns	ns	ns	ns	ns
		V×T	**	**	**	**	**
		Y×V×T	ns	ns	ns	ns	ns

Table 3

Table 4

Table 5

Table 6

Table 7

Table 8

Table 9

Table 10

Effects of different fertilization methods on nitrogen efficiency in rice"

年份 Year	品种 Variety	处理Treatment	氮素农学利用率 N agronomic efficiency (kg kg^-1)	氮素生理利用率 N physiological efficiency (kg kg^-1)	氮素吸收利用率 N recovery efficiency (%)	氮素谷物生产效率 N grain production efficiency (kg kg^-1)	氮素干物质生产效率 N dry matter production efficiency (kg kg^-1)	百千克籽粒需氮量 N requirement for 100-kg grain (kg)	氮素偏生产力 N partial factor productivity (kg kg^-1)
2019	南粳9108 Nanjing 9108	0N	—	—	—	61.31 a	107.51 a	1.63 b	—
		CFM	9.93 b	31.43 b	30.33 c	48.27 b	99.36 b	2.07 a	33.57 d
		FM1	7.47 c	25.69 c	29.07 c	46.14 c	93.07 c	2.17 a	31.50 e
		FM2	10.83 b	33.71 b	32.13 b	48.88 b	88.79 c	2.05 a	34.87 c
		FM3	13.77 a	38.35 a	35.90 a	50.33 b	99.68 b	1.99 a	37.80 a
		FM4	12.33 a	35.78 a	34.47 a	49.37 b	102.49 ab	2.03 a	36.37 b
	南粳5718 Nanjing 5718	0N	—	—	—	69.92 a	104.08 a	1.43 b	—
		CFM	8.07 b	22.91 b	35.50 c	46.19 b	98.74 b	2.16 a	34.57 b
		FM1	7.23 c	20.74 c	35.13 c	44.30 c	95.26 c	2.21 a	33.73 c
		FM2	8.33 b	24.95 b	36.77 b	45.77 b	101.99 a	2.18 a	34.83 b
		FM3	10.97 a	27.64 a	42.17 a	45.97 b	99.63 ab	2.18 a	37.47 a
		FM4	10.50 a	27.34 a	40.70 a	46.23 b	98.78 b	2.16 a	37.00 a
2020	南粳9108 Nanjing 9108	0N	—	—	—	57.47 a	105.45 a	1.74 b	—
		CFM	11.10 b	33.22 b	30.40 c	46.89 b	99.12 b	2.13 a	33.67 b
		FM1	10.43 c	25.81 c	29.13 c	48.25 c	92.63 c	2.07 a	31.00 c
		FM2	11.67 b	34.31 b	32.13 b	45.95 b	88.23 c	2.09 a	34.23 b
		FM3	13.20 a	36.77 a	35.90 a	47.58 b	99.62 b	2.10 a	35.77 a
		FM4	12.73a	36.94 a	34.47 a	47.88 b	100.45 ab	2.09 a	35.30 a
	南粳5718 Nanjing 5718	0N	—	—	—	65.63 a	101.26 a	1.52 b	—
		CFM	9.73 b	23.78 b	35.50 c	44.86 b	97.56 b	2.23 a	33.63 b
		FM1	9.03 c	21.87 c	35.13 c	42.49 c	90.54 c	2.20 a	31.93 c
		FM2	10.37 b	25.48 b	37.77 b	46.26 b	100.25 a	2.16 a	34.27 b
		FM3	11.50 a	28.94 a	42.10 a	44.63 b	98.53 ab	2.24 a	36.40 a
		FM4	10.80 a	28.08 a	40.70 a	44.53 b	96.52 b	2.25 a	35.70 a
方差分析 Variance analysis		Y	ns	ns	ns	ns	ns	ns	ns
		V	**	**	**	**	ns	ns	**
		T	**	**	**	**	**	ns	**
		Y×V	ns	ns	ns	ns	ns	ns	ns
		Y×T	ns	ns	ns	ns	ns	ns	ns
		V×T	**	**	**	**	**	ns	**
		Y×V×T	ns	ns	ns	ns	ns	ns	ns

Table 10

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[33]	邹应斌, 黄见良, 屠乃美, 李合松, 黄升平, 张杨珠. “旺壮重”栽培对双季杂交稻产量形成及生理特性的影响. 作物学报, 2001, 27: 343-350.
	Zou Y B, Huang J L, Tu N M, Li H S, Huang S P, Zhang Y Z. Effects of the VSW cultural method on yield formation and physiological characteristics in double cropping hybrid rice. Acta Agron Sin, 2001, 27: 343-350 (in Chinese with English abstract).
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处理 Treatment	基肥N Basic fertilizer N (kg hm^-2)	分蘖肥N Tiller fertilizer N (kg hm^-2)	穗肥N Earing fertilizer N (kg hm^-2)	总N Total N (kg hm^-2)	施肥次数Fertilization times
不施氮肥0N	0	0	0	0	0
常规施肥对照CFM	105	105	90	300	4
100%基肥一次性侧深施FM1	300	0	0	300	1
70%基肥侧深施+30%分蘖肥FM2	210	90	0	300	2
70%基肥侧深施+30%穗肥FM3	210	0	90	300	2
35%基肥侧深施+35%分蘖肥+30%穗肥FM4	105	105	90	300	4

年份 Year	品种 Variety	处理 Treatment	产量 Grain yield (t hm^-2)	穗数 Panicles per (×10⁴ hm^-2)	每穗粒数Spikelets per panicle	结实率 Filled grains rate (%)	千粒重 1000-grain weight (g)
2019	南粳9108 Nanjing 9108	0N	7.21 d	255.07 d	115.44 e	96.94 a	28.91 a
		CFM	10.07 bc	351.85 c	126.95 d	94.58 b	26.50 bc
		FM1	9.45 c	351.80 c	114.95 e	89.72 f	26.28 cd
		FM2	10.46 b	374.07 b	130.98 c	90.93 e	25.87 d
		FM3	11.34 a	401.82 a	138.61 a	91.85 d	26.63 b
		FM4	10.91 a	372.60 b	134.01 b	92.54 c	26.75 b
	南粳5718 Nanjing 5718	0N	8.25 d	265.95 d	112.56 e	97.68 a	30.43 a
		CFM	10.37 bc	362.82 c	121.66 d	95.74 b	28.14 bc
		FM1	10.12 c	374.73 b	109.42 f	91.03 e	27.50 c
		FM2	10.45 b	375.67 b	126.71 c	91.41 e	27.71 c
		FM3	11.24 a	411.37 a	133.96 a	92.37 d	28.35 b
		FM4	11.10 a	405.87 a	128.53 b	93.42 c	28.53 b
2020	南粳9108 Nanjing 9108	0N	6.77 c	244.68 d	114.29 d	95.91 a	28.55 a
		CFM	9.80 b	343.93 c	127.38 c	94.30 ab	26.48 bc
		FM1	9.90 b	371.12 b	118.34 d	89.24 c	26.39 c
		FM2	10.27 ab	374.21 b	129.11 bc	92.12 b	26.11 d
		FM3	10.73 a	397.91 a	132.83 ab	92.90 b	26.68 b
		FM4	10.59 a	403.12 a	133.42 a	93.15 b	26.72 b
	南粳5718 Nanjing 5718	0N	7.77 c	276.31 d	111.24 d	96.08 a	30.80 a
		CFM	10.09 b	356.03 c	121.14 c	94.73 b	28.18 b
		FM1	10.18 b	379.91 b	113.24 d	91.45 d	27.87 c
		FM2	10.58 ab	386.11 b	122.45 bc	93.17 c	27.89 c
		FM3	10.92 a	409.22 a	126.38 a	93.83 c	28.00 bc
		FM4	10.71 a	405.25 a	124.25 ab	93.64 c	28.11 b
方差分析Variance analysis		Y	**	**	**	**	**
		V	**	**	**	**	**
		T	**	**	**	**	**
		Y×T	ns	ns	**	**	ns
		Y×V	**	ns	ns	ns	ns
		V×T	**	**	**	ns	ns
		Y×V×T	**	ns	ns	ns	ns

年份 Year	品种 Variety	处理 Treatment	播种期至拔节期 S-J (×10⁴ m² d hm^-2)	拔节期至抽穗期 J-H (×10⁴ m² d hm^-2)	抽穗期至成熟期 H-M (×10⁴ m² d hm^-2)
2019	南粳9108 Nanjing 9108	0N	55.83 c	88.23 d	172.98 d
		CFM	138.55 b	174.01 c	342.01 c
		FM1	160.13 a	190.15 a	357.59 a
		FM2	156.78 a	188.72 a	356.02 a
		FM3	142.99 b	179.95 b	359.85 b
		FM4	142.73 b	179.73 b	355.96 b
	南粳5718 Nanjing 5718	0N	84.55 c	108.45 d	203.11 d
		CFM	150.24 b	189.86 c	370.95 c
		FM1	176.95 a	205.62 a	380.09 a
年份 Year	品种 Variety	处理 Treatment	播种期至拔节期 S-J (×10⁴ m² d hm^-2)	拔节期至抽穗期 J-H (×10⁴ m² d hm^-2)	抽穗期至成熟期 H-M (×10⁴ m² d hm^-2)
		FM2	177.63 a	206.88 a	381.55 a
		FM3	156.87 b	197.01 b	385.70 b
		FM4	155.68 b	196.33 b	383.45 b
2020	南粳9108 Nanjing 9108	0N	56.73 c	88.87 d	173.62 d
		CFM	139.49 b	174.47 c	342.49 c
		FM1	162.13 a	190.99 a	357.97 a
		FM2	157.28 a	189.24 a	356.44 a
		FM3	143.77 b	180.63 b	360.13 b
		FM4	143.23 b	180.19 b	356.26 b
	南粳5718 Nanjing 5718	0N	84.95 c	108.91 d	207.15 d
		CFM	151.26 b	190.18 c	373.85 c
		FM1	177.25 a	206.00 a	380.13 a
		FM2	178.13 a	207.26 a	385.59 a
		FM3	157.19 b	197.55 b	385.90 b
		FM4	156.30 b	196.59 b	384.13 b
方差分析Variance analysis		Y	ns	ns	ns
		V	**	**	**
		T	**	**	**
		Y×V	ns	ns	ns
		Y×T	ns	ns	ns
		V×T	**	**	**
		Y×V×T	ns	ns	ns

年份 Year	品种 Variety	处理 Treatment	拔节期 Jointing stage (t hm^-2)	抽穗期 Heading stage (t hm^-2)	成熟期 Maturity stage (t hm^-2)	收获指数 Harvest index (%)
2019	南粳9108 Nanjing 9108	0N	2.73 d	7.02 c	13.20 c	54.62 a
		CFM	3.37 c	10.57 b	19.77 b	50.94 b
		FM1	4.72 a	10.62 ab	18.67 b	50.62 b
		FM2	4.70 a	11.63 a	20.13 ab	51.96 b
		FM3	3.75 b	11.70 a	21.77 a	52.09 b
		FM4	3.73 b	11.63 a	21.66 a	50.37 b
	南粳5718 Nanjing 5718	0N	3.07 d	8.40 b	14.69 d	56.16 a
		CFM	3.83 c	11.37 b	21.87 b	47.42 b
		FM1	4.98 a	11.75 ab	20.60 c	49.13 b
		FM2	4.93 a	12.19 a	21.61 b	48.36 b
		FM3	4.41 b	12.56 a	23.10 a	48.66 b
		FM4	4.41 b	12.52 a	23.04 a	48.18 b
2020	南粳9108 Nanjing 9108	0N	2.43 d	6.51 c	11.95 c	56.65 a
		CFM	3.56 c	10.25 b	19.47 b	50.34 b
		FM1	4.86 a	11.01 ab	19.26 b	51.40 b
		FM2	4.89 a	11.34 a	20.23 ab	50.77 b
		FM3	4.03 b	11.28 a	20.78 a	51.64 b
		FM4	4.05 b	11.31 a	20.84 a	50.82 b
	南粳5718 Nanjing 5718	0N	2.62 d	7.59 b	13.27 d	58.54 a
		CFM	3.73 c	10.77 b	21.42 b	47.10 b
		FM1	5.31 a	12.25 ab	20.70 c	49.18 b
		FM2	5.33 a	12.82 a	22.11 ab	47.85 b
		FM3	4.42 b	12.45 a	22.86 a	47.77 b
		FM4	4.43 b	12.48 a	22.97 a	46.63 b
方差分析Variance analysis		Y	ns	ns	ns	ns
		V	ns	**	**	ns
		T	**	**	**	**
		Y×V	ns	ns	ns	ns
		Y×T	ns	ns	ns	ns
		V×T	**	**	**	*
		Y×V×T	ns	ns	ns	ns

年份 Year	品种 Variety	处理 Treatment	播种期至拔节期 S-J (g m^-2 d^-1)	拔节期至抽穗期 J-H (g m ^-2d^-1)	抽穗期至成熟期 H-M (g m^-2 d^-1)
2019	南粳9108 Nanjing 9108	0N	4.71 d	20.92 d	6.12 c
		CFM	6.79 c	24.62 b	10.72 a
		FM1	8.73 a	22.00 c	8.18 b
		FM2	8.70 a	22.08 c	7.82 b
		FM3	7.47 b	26.07 a	11.00 a
		FM4	7.46 b	26.00 a	10.95 a
	南粳5718 Nanjing 5718	0N	5.04 d	21.05 d	6.23 c
		CFM	7.16 c	25.09 b	11.41 a
		FM1	8.92 a	23.21 c	8.75 b
		FM2	8.90 a	23.28 c	9.03 b
		FM3	7.62 b	27.22 a	11.43 a
		FM4	7.63 b	27.10 a	11.42 a
2020	南粳9108 Nanjing 9108	0N	4.85 d	21.00 d	6.18 c
		CFM	6.87 c	24.70 b	10.78 a
		FM1	8.77 a	22.02 c	8.24 b
		FM2	8.74 a	22.14 c	7.88 b
		FM3	7.51 b	26.15 a	11.02 a
		FM4	7.44 b	26.02 a	10.99 a
	南粳5718 Nanjing 5718	0N	5.08 d	21.17 d	6.27 c
		CFM	7.20 c	25.15 b	11.45 a
		FM1	8.98 a	23.27 c	8.85 b
		FM2	8.92 a	23.34 c	9.09 b
		FM3	7.64 b	27.28 a	11.47 a
		FM4	7.67 b	27.14 a	11.48 a
方差分析Variance analysis		Y	ns	ns	ns
		V	**	**	**
		T	**	**	*
		Y×V	ns	ns	ns
		Y×T	ns	ns	ns
		V×T	**	*	*
		Y×V×T	ns	ns	ns

Effects of side deep placement of nitrogen on rice yield and nitrogen use efficiency

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年份 Year	品种 Variety	处理 Treatment	拔节期 Jointing stage	抽穗期 Heading stage	成熟期 Maturity stage
2019	南粳9108 Nanjing 9108	0N	1.68 c	3.69 c	1.49 c
		CFM	4.15 b	6.41 b	3.81 ab
		FM1	4.81 a	6.74 a	3.94 a
		FM2	4.69 a	6.77 a	3.96 a
		FM3	4.28 b	6.65 a	4.05 a
		FM4	4.26 b	6.65 a	3.98 a
	南粳5718 Nanjing 5718	0N	2.53 c	4.06 c	2.07 c
		CFM	4.50 b	7.02 b	4.10 ab
		FM1	5.31 a	7.19 a	4.16 a
		FM2	5.29 a	7.27 a	4.21 a
		FM3	4.69 b	7.24 a	4.25 a
		FM4	4.66 b	7.25 a	4.21 a
2020	南粳9108 Nanjing 9108	0N	1.81 c	3.81 c	1.58 c
2020	南粳9108 Nanjing 9108	CFM	4.41 b	6.62 b	4.01 b
年份 Year	品种 Variety	处理 Treatment	拔节期 Jointing stage	抽穗期 Heading stage	成熟期 Maturity stage
		FM1	4.98 a	6.62 b	4.09 b
		FM2	4.96 a	6.79 b	4.11 b
		FM3	4.52 b	6.97 a	4.35 a
		FM4	4.50 b	6.96 a	4.33 a
	南粳5718 Nanjing 5718	0N	2.88 c	4.14 c	2.21 c
		CFM	4.87 b	7.12 b	4.26 b
		FM1	5.28 a	7.12 b	4.27 b
		FM2	5.26 a	7.25 b	4.28 b
		FM3	4.98 b	7.47 a	4.46 a
		FM4	5.00 b	7.46 a	4.45 a
方差分析Variance analysis		Y	ns	ns	ns
		V	**	**	**
		T	**	**	**
		Y×V	ns	ns	ns
		Y×T	ns	ns	ns
		V×T	**	**	**
		Y×V×T	ns	ns	ns

年份 Year	品种 Variety	处理 Treatment	拔节期 Jointing stage (×10^-2 t hm^-2)	抽穗期 Heading stage (×10^-2 t hm^-2)	成熟期 Maturity stage (×10^-2 t hm^-2)
2019	南粳9108 Nanjing 9108	0N	3.97 e	9.80 d	11.76 d
		CFM	6.48 d	16.91 c	20.86 bc
		FM1	10.54 ab	16.93 c	20.48 c
		FM2	10.76 a	17.66 ab	21.40 b
		FM3	7.67 c	18.17 a	22.53 a
		FM4	7.55 c	17.90 ab	22.10 a
	南粳5718 Nanjing 5718	0N	3.85 d	9.80 d	11.80 d
		CFM	6.07 c	18.16 c	22.45 bc
		FM1	10.46 a	18.58 c	22.34 c
		FM2	10.55 a	18.93 ab	22.83 b
		FM3	7.38 b	19.67 a	24.45 a
		FM4	7.30 b	19.45 ab	24.01 a
2020	南粳9108 Nanjing 9108	0N	3.99 e	9.84 d	11.78 d
		CFM	6.52 d	16.93 c	20.90 bc
		FM1	10.58 ab	16.97 c	20.52 c
		FM2	10.80 a	17.70 ab	21.42 b
		FM3	7.69 c	18.21 a	22.55 a
		FM4	7.59 c	17.94 ab	22.12 a
	南粳5718 Nanjing 5718	0N	3.87 d	9.86 d	11.84 d
		CFM	6.11 c	18.20 c	22.49 bc
		FM1	10.50 a	18.64 c	22.38 c
年份 Year	品种 Variety	处理 Treatment	拔节期 Jointing stage (×10^-2 t hm^-2)	抽穗期 Heading stage (×10^-2 t hm^-2)	成熟期 Maturity stage (×10^-2 t hm^-2)
		FM2	10.61 a	18.97 ab	22.87 b
		FM3	7.42 b	19.71 a	24.47 a
		FM4	7.34 b	19.47 ab	24.05 a
方差分析Variance analysis		Y	ns	ns	ns
		V	**	**	**
		T	**	**	**
		Y×V	ns	ns	ns
		Y×T	ns	ns	ns
		V×T	**	**	**
		Y×V×T	ns	ns	ns

年份 Year	品种 Variety	处理 Treatment	播种期至拔节期 S-J	拔节期至抽穗期 J-H	抽穗期至成熟期 H-M
2019	南粳9108 Nanjing 9108	0N	0.43 d	1.29 c	0.21 d
		CFM	0.71 c	2.31 a	0.43 b
		FM1	1.17 a	1.47 b	0.38 c
		FM2	1.19 a	1.52 b	0.40 c
		FM3	0.84 b	2.33 a	0.47 a
		FM4	0.83 b	2.29 a	0.46 a
	南粳5718 Nanjing 5718	0N	0.42 d	1.32 c	0.21 d
		CFM	0.67 c	2.68 a	0.47 b
		FM1	1.16 a	1.57 b	0.41 c
		FM2	1.16 a	1.63 b	0.42 c
		FM3	0.80 b	2.68 a	0.51 a
		FM4	0.81 b	2.72 a	0.52 a
2020	南粳9108 Nanjing 9108	0N	0.45 d	1.31 c	0.23 d
		CFM	0.73 c	2.33 a	0.45 b
		FM1	1.17 a	1.51 b	0.42 c
		FM2	1.21 a	1.54 b	0.42 c
年份 Year	品种 Variety	处理 Treatment	播种期至拔节期 S-J	拔节期至抽穗期 J-H	抽穗期至成熟期 H-M
	南粳5718 Nanjing 5718	0N	0.44 d	1.34 c	0.23 d
		FM3	0.86 b	2.35 a	0.49 a
		FM4	0.85 b	2.31 a	0.48 a
		CFM	0.69 c	2.70 a	0.49 b
		FM1	1.18 a	1.59 b	0.43 c
		FM2	1.20 a	1.65 b	0.44 c
		FM3	0.82 b	2.72 a	0.53 a
		FM4	0.83 b	2.74 a	0.54 a
方差分析Variance analysis		Y	ns	ns	ns
		V	**	**	**
		T	**	**	**
		Y×V	ns	ns	ns
		Y×T	ns	ns	ns
		V×T	**	**	**
		Y×V×T	ns	ns	ns

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