甬优系列籼粳杂交稻产量及氮素吸收利用的差异

doi:10.3724/SP.J.1006.2020.92051

Abstract

Abstract:

A field experiment was conducted with 24 indica-japonica hybrid rice varieties (lines) of Yongyou series, from which three types (high yield and high AE (agronomic nitrogen use efficiency) [HH], high yield and medium AE [HM], medium yield and medium AE [MM]) were selected to explore the characteristics of varieties with high yield and high AE. The yield of HH type was 4.04%-4.38% and 13.37%-13.41% higher than that of HM type and MM type respectively, owing to the larger number of total spikelets, which was 5.87×10 ⁸-6.20×10 ⁸ hm ^-2. Compared with HM and MM type, HH type had a high percentage of tiller rate, which was 68.83%-70.05%. The LAI of HH type was maximum at heading stage and declined slowly after heading. As a result, the LAI of HH type was above 3.85 at maturity stage. The dry matter accumulation of HH type was 7.91-7.99 t hm ^-2from heading to maturity, which was the highest in three types, and its dry matter accumulation was more than 21.15-21.46 t hm ^-2 in the whole growth period. The total nitrogen uptake of HH type showed 5.07%-5.14% and 4.50%-5.96% increase than that of HM type and MM type respectively at maturity stage. The nitrogen sbsorption rate from jointing to heading stage and from heading to maturity stage showed HH type > HM type > MM type, as well as NTSH (N transportation from stem after heading), NIPH (N increase in panicle after heading) and NHI (N harvest index). HH type had the highest NRE (nitrogen recovery use efficiency), AE, PE (physiological nitrogen use efficiency) and PFP (partial factor productivity of applied N). Expect for NRE and NRG (nitrogen requirement for 100 kg grain), all the other nitrogen utilization indexes of HM type were higher than that of MM type.

Key words: indica-japonica hybrid rice varieties of Yongyou series, high yield and high agronomic nitrogen use efficiency, yield, nitrogen

Lei ZHOU,Qiu-Yuan LIU,Jin-Yu TIAN,Meng-Hua ZHU,Shuang CHENG,Yang CHE,Zhi-Jie WANG,Zhi-Peng XING,Ya-Jie HU,Guo-Dong LIU,Hai-Yan WEI,Hong-Cheng ZHANG. Differences in yield and nitrogen absorption and utilization of indica-japonica hybrid rice varieties of Yongyou series[J].Acta Agronomica Sinica, 2020, 46(5): 772-786.

Figures/Tables 9

Table 1

Table 2

Table 3

Table 4

Differences in dry matter accumulation and its ratio at main growing stages of indica-japonica hybrid rice varieties of Yongyou series ..."

品种类型 Type	品种名称 Variety	移栽-拔节 T-J		拔节-抽穗 J-H		抽穗-成熟 H-M		群体总干物重 Total dry matter accumulation (t hm^-2)	收获指数 Harvest index
品种类型 Type	品种名称 Variety	积累量 Accumulate (t hm^-2)	比例 RBT (%)	积累量 Accumulate (t hm^-2)	比例 RBT (%)	积累量 Accumulate (t hm^-2)	比例 RBT (%)	群体总干物重 Total dry matter accumulation (t hm^-2)	收获指数 Harvest index
2017
高产氮高效	甬优1662 Yongyou 1662	4.62	21.82	8.60	40.56	7.97	37.62	21.19	0.5251
HH	甬优4949 Yongyou 4949	4.67	22.11	8.59	40.71	7.85	37.17	21.11	0.5226
高产氮中效	甬优2640 Yongyou 2640	4.73	22.81	8.40	40.55	7.59	36.64	20.72	0.5160
HM	甬优4953 Yongyou 4953	4.70	22.64	8.54	41.13	7.53	36.23	20.77	0.5112
中产氮中效	甬优6715 Yongyou 6715	5.00	25.42	8.13	41.33	6.54	33.25	19.67	0.4964
MM	甬优6760 Yongyou 6760	4.95	25.28	8.10	41.33	6.54	33.39	19.59	0.4978
	HH平均值 HH mean	4.64 b	21.97 b	8.60 a	40.63 a	7.91 a	37.40 a	21.15 a	0.5239 a
	HM平均值 HM mean	4.72 b	22.73 b	8.47 a	40.84 a	7.56 b	36.44 a	20.75 b	0.5136 ab
	MM平均值 MM mean	4.97 a	25.35 a	8.11 b	41.33 a	6.54 c	33.32 b	19.63 c	0.4971 b
2018
高产氮高效	甬优1662 Yongyou 1662	4.82	22.45	8.64	40.22	8.02	37.33	21.48	0.5218
HH	甬优4949 Yongyou 4949	4.79	22.36	8.68	40.49	7.97	37.16	21.44	0.5213
高产氮中效	甬优2640 Yongyou 2640	4.81	23.19	8.59	41.42	7.34	35.39	20.74	0.5192
HM	甬优4953 Yongyou 4953	4.85	23.27	8.52	40.91	7.46	35.82	20.83	0.5121
中产氮中效	甬优6715 Yongyou 6715	5.11	25.93	8.19	41.54	6.41	32.54	19.71	0.5018
MM	甬优6760 Yongyou 6760	5.17	26.26	8.07	40.97	6.45	32.77	19.69	0.5002
	HH平均值 HH mean	4.80 b	22.41 c	8.66 a	40.35 a	7.99 a	37.24 a	21.46 a	0.5216 a
	HM平均值 HM mean	4.83 b	23.23 b	8.56 a	41.17 a	7.40 b	35.60 b	20.78 b	0.5156 a
	MM平均值 MM mean	5.14 a	26.09 a	8.13 b	41.26 a	6.43 c	32.65 c	19.70 c	0.5010 b

Table 4

Table 5

Table 6

Differences in photosynthetic potential, crop growth rate and net assimilation rate of indica-japonica hybrid rice varieties of Yongyou series..."

品种类型 Type	品种名称 Variety	光合势Photosynthetic potential (m² d m^-2)			群体生长率Crop growth rate (g m^-2 d^-1)			净同化率Net assimilation rate (g m^-2 d^-1)
		移栽-拔节	拔节-抽穗	抽穗-成熟	移栽-拔节	拔节-抽穗	抽穗-成熟	移栽-拔节	拔节-抽穗	抽穗-成熟
		T-J	J-H	H-M	T-J	J-H	H-M	T-J	J-H	H-M
2017
高产氮高效HH	甬优1662 Yongyou 1662	103.92	166.01	363.74	9.63	33.07	13.51	3.26	5.37	2.30
		移栽-拔节	拔节-抽穗	抽穗-成熟	移栽-拔节	拔节-抽穗	抽穗-成熟	移栽-拔节	拔节-抽穗	抽穗-成熟
		T-J	J-H	H-M	T-J	J-H	H-M	T-J	J-H	H-M
	甬优4949 Yongyou 4949	106.58	166.01	355.54	9.52	33.05	13.53	3.22	5.36	2.32
高产氮中效 HM	甬优2640 Yongyou 2640	108.05	171.45	336.28	9.64	31.11	13.55	3.25	5.06	2.38
高产氮中效 HM	甬优4953 Yongyou 4953	107.07	171.32	337.96	9.60	31.65	13.44	3.24	5.16	2.34
中产氮中效 MM	甬优6715 Yongyou 6715	116.03	185.02	293.00	9.81	28.05	13.09	3.27	4.52	2.37
中产氮中效 MM	甬优6760 Yongyou 6760	112.25	183.72	297.59	9.91	27.94	12.83	3.31	4.54	2.33
	HH平均值 HH mean	105.25 a	166.01 c	359.64 a	9.57 a	33.06 a	13.52 a	3.24 a	5.36 a	2.31 a
	HM平均值 HM mean	107.56 a	171.38 b	337.12 b	9.62 a	31.38 b	13.49 a	3.24 a	5.11 b	2.36 a
	MM平均值 MM mean	114.14 a	184.37 a	295.30 c	9.86 a	28.00 c	12.96 b	3.29 a	4.53 c	2.35 a
2018
高产氮高效 HH	甬优1662 Yongyou 1662	107.56	174.42	353.69	9.84	32.00	14.07	3.32	5.13	2.38
高产氮高效 HH	甬优4949 Yongyou 4949	107.07	168.22	359.02	9.79	33.40	13.74	3.30	5.36	2.34
高产氮中效 HM	甬优2640 Yongyou 2640	105.84	172.13	341.04	9.82	31.82	13.11	3.33	5.18	2.27
高产氮中效 HM	甬优4953 Yongyou 4953	106.58	165.62	347.13	9.89	32.78	13.10	3.34	5.33	2.26
中产氮中效 MM	甬优6715 Yongyou 6715	114.50	179.62	300.65	10.02	29.24	12.57	3.35	4.70	2.27
中产氮中效 MM	甬优6760 Yongyou 6760	115.26	179.62	300.14	10.14	28.81	12.65	3.38	4.63	2.29
	HH平均值 HH mean	107.32 b	171.32 a	356.36 a	9.81 a	32.70 a	13.90 a	3.31 a	5.24 a	2.36 a
	HM平均值 HM mean	106.21 b	168.88 a	344.08 b	9.85 a	32.30 a	13.10 b	3.34 a	5.26 a	2.27 b
	MM平均值 MM mean	114.88 a	179.62 a	300.39 c	10.08 a	29.02 b	12.61 b	3.37 a	4.66 b	2.28 ab

Table 6

Table 7

Differences in nitrogen accumulation and its ratio and nitrogen uptake rate at main growing stages of indica-japonica hybrid rice varieties of Yongyou series ..."

品种类型 Type	品种名称 Cultivar	移栽-拔节 T-J			拔节-抽穗 J-H			抽穗-成熟 H-M			总吸氮量 Total N accumulation (kg hm^-2)
品种类型 Type	品种名称 Cultivar	积累量 Accumulate (kg hm^-2)	所占比例 RIT (%)	吸收速率 Uptake rate (kg hm^-2 d^-1)	积累量 Accumulate (kg hm^-2)	所占比例 RIT (%)	吸收速率 Uptake rate (kg hm^-2 d^-1)	积累量 Accumulate (kg hm^-2)	所占比例 RIT (%)	吸收速率 Uptake rate (kg hm^-2 d^-1)	总吸氮量 Total N accumulation (kg hm^-2)
2017
高产氮高效	甬优1662 Yongyou 1662	86.4	35.45	1.80	108.49	44.51	4.17	48.86	20.04	0.83	243.74
HH	甬优4949 Yongyou 4949	86.81	35.77	1.77	109.43	45.09	4.21	46.47	19.15	0.80	242.71
高产氮中效	甬优2640 Yongyou 2640	88.85	38.29	1.81	100.17	43.17	3.71	43.04	18.55	0.77	232.06
HM	甬优4953 Yongyou 4953	87.50	37.94	1.79	101.04	43.81	3.74	42.06	18.24	0.75	230.60
中产氮中效	甬优6715 Yongyou 6715	95.08	40.94	1.86	102.30	44.05	3.53	34.85	15.01	0.70	232.23
MM	甬优6760 Yongyou 6760	94.64	40.58	1.89	102.80	44.07	3.54	35.81	15.35	0.70	233.24
	HH平均值 HH mean	86.60 b	35.61 c	1.79 a	108.96 a	44.80 a	4.19 a	47.66 a	19.59 a	0.81 a	243.22 a
	HM平均值 HM mean	88.17 b	38.12 b	1.80 a	100.60 c	43.49 b	3.73 b	42.55 a	18.39 a	0.76 b	231.33 b
	MM平均值 MM mean	94.86 a	40.76 a	1.88 a	102.55 b	44.06 ab	3.54 c	35.33 b	15.18 b	0.70 c	232.74 b
2018
高产氮高效	甬优1662 Yongyou 1662	89.20	36.11	1.82	110.04	44.54	4.08	47.8	19.35	0.84	247.04
HH	甬优4949 Yongyou 4949	88.23	35.77	1.80	109.90	44.56	4.23	48.51	19.67	0.84	246.64
高产氮中效	甬优2640 Yongyou 2640	89.48	38.17	1.83	102.19	43.59	3.78	42.75	18.24	0.76	234.42
HM	甬优4953 Yongyou 4953	90.17	38.30	1.84	101.95	43.30	3.92	43.31	18.40	0.76	235.44
中产氮中效	甬优6715 Yongyou 6715	96.07	41.14	1.88	103.02	44.11	3.68	34.46	14.75	0.68	233.55
MM	甬优6760 Yongyou 6760	97.21	41.84	1.91	102.62	44.16	3.67	32.53	14.00	0.64	232.37
	HH平均值 HH mean	88.71 b	35.94 c	1.81 b	109.97 a	44.55 a	4.15 a	48.16 a	19.51 a	0.84 a	246.84 a
	HM平均值 HM mean	89.83 b	38.24 b	1.83 ab	102.07 c	43.45 b	3.85 b	43.03 b	18.32 a	0.76 b	234.93 b
	MM平均值 MM mean	96.64 a	41.49 a	1.89 a	102.82 b	44.14 a	3.67 b	33.49 c	14.38 b	0.66 c	232.96 b

Table 7

Table 8

Differences in N accumulate and transportation in each organ at heading and maturity of indica-japonica hybrid rice varieties of Yongyou series..."

品种类型 Type	品种名称 Variety	氮素积累量 Nitrogen accumulation (kg hm^-2)						茎鞘氮素转运量 NTSH (kg hm^-2)	叶片氮素转运量 NTLH (kg hm^-2)	穗部氮素积累量 NIPH (kg hm^-2)	氮素收获指数 NHI (%)
		抽穗期 Heading			成熟期 Maturity
		茎鞘 Stem	叶片 Leaf	穗部 Panicle	茎鞘 Stem	叶片 Leaf	穗部 Panicle
2017
高产氮高效 HH	甬优1662 Yongyou 1662	70.87	95.14	28.88	42.27	43.62	157.85	28.60	51.52	128.97	64.76
高产氮高效 HH	甬优4949 Yongyou 4949	71.38	97.14	27.72	43.13	43.92	155.66	28.25	53.22	127.94	64.13
高产氮中效 HM	甬优2640 Yongyou 2640	69.26	93.81	25.95	47.44	42.55	142.06	21.82	51.26	116.11	61.22
高产氮中效 HM	甬优4953 Yongyou 4953	67.00	93.78	27.75	45.60	41.98	143.01	21.40	51.80	115.26	62.02
中产氮中效 MM	甬优6715 Yongyou 6715	72.28	99.37	25.73	55.49	47.47	129.27	16.79	51.90	103.54	55.66
中产氮中效 MM	甬优6760 Yongyou 6760	73.57	98.92	24.94	57.59	47.87	127.78	15.98	51.05	102.84	54.78
	HH平均值 HH mean	71.13 a	96.14 ab	28.30 a	42.70 b	43.77 b	156.76 a	28.42 a	52.37 a	128.46 a	64.44 a
	HM平均值 HM mean	68.13 a	93.80 b	26.85 a	46.52 b	42.26 b	142.54 b	21.61 b	51.53 a	115.68 b	61.62 b
	MM平均值 MM mean	72.93 a	99.14 a	25.33 a	56.54 a	47.67 a	128.52 c	16.39 c	51.47 a	103.19 c	55.22 c
2018
高产氮高效 HH	甬优1662 Yongyou 1662	74.53	96.20	28.50	46.45	46.67	153.92	28.08	49.53	125.42	62.31
高产氮高效 HH	甬优4949 Yongyou 4949	73.50	96.83	27.79	45.87	45.69	155.08	27.63	51.14	127.29	62.88
高产氮中效 HM	甬优2640 Yongyou 2640	69.68	95.04	26.95	48.43	44.24	141.74	21.25	50.80	114.79	60.47
高产氮中效 HM	甬优4953 Yongyou 4953	71.99	94.27	25.87	49.08	45.11	141.25	22.91	49.16	115.38	59.99
中产氮中效 MM	甬优6715 Yongyou 6715	72.31	101.00	25.78	57.10	50.30	126.15	15.21	50.70	100.37	54.01
中产氮中效 MM	甬优6760 Yongyou 6760	73.47	101.24	25.12	57.75	49.73	124.89	15.72	51.51	99.77	53.75
	HH平均值 HH mean	74.02 a	96.52 b	28.15 a	46.16 c	46.18 b	154.50 a	27.85 a	50.33 a	126.36 a	62.60 a
	HM平均值 HM mean	70.84 a	94.65 b	26.41 b	48.76 b	44.67 b	141.49 b	22.08 b	49.98 a	115.08 b	60.23 b
	MM平均值 MM mean	72.89 a	101.12 a	25.45 c	57.42 a	50.01 a	125.52 c	15.47 c	51.10 a	100.07 c	53.88 c

Table 8

Table 9

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品种名称/年份 Variety/year	2017			2018
	产量 Yield (t hm^-2)	氮素农学利用率 AE (kg kg^-1)		产量 Yield (t hm^-2)	氮素农学利用率 AE (kg kg^-1)
	产量 Yield (t hm^-2)	氮素农学利用率 AE (kg kg^-1)	甬优1206 Yongyou 1206	产量 Yield (t hm^-2)	氮素农学利用率 AE (kg kg^-1)	8.80	10.84	8.96	12.68
甬优1218 Yongyou 1218	9.16	11.56		9.19	10.47
甬优1271 Yongyou 1271	8.62	11.15		8.77	12.23
甬优1526 Yongyou 1526	9.59	12.56		9.71	13.46
甬优1662 Yongyou 1662	11.13	18.81		11.21	19.18
甬优1826 Yongyou 1826	9.60	13.43		9.56	12.36
甬优2519 Yongyou 2519	9.54	10.44		9.45	12.12
甬优2640 Yongyou 2640	10.69	15.88		10.77	16.94
甬优4949 Yongyou 4949	11.03	18.60		11.18	19.14
甬优4953 Yongyou 4953	10.62	15.99		10.67	16.52
甬优6715 Yongyou 6715	9.77	14.79		9.89	15.94
甬优6760 Yongyou 6760	9.76	15.09		9.85	15.43
甬优6763 Yongyou 6763	10.24	16.95		10.09	15.37
甬优7053 Yongyou 7053	8.80	11.38		8.85	12.01
甬优7722 Yongyou 7722	9.05	12.22		9.11	11.52
甬优8484 Yongyou 8484	8.88	9.32		9.03	9.43
平均 Mean	9.71	13.69		9.77	14.05
标准差 SD	0.80	2.87		0.79	2.86
变异系数CV (%)	8.22	20.98		8.07	20.34

品种类型 Type	品种名称 Variety	单位面积穗数 No. of panicles (×10⁴ hm^-2)	每穗粒数 Spikelets per panicle	总颖花量 Total spikelet number (×10⁸ hm^-2)	结实率 Percentage of filled grain (%)	千粒重 1000-grain weight (g)	产量 Yield (t hm^-2)
2017
高产氮高效	甬优1662 Yongyou 1662	241.03	243.40	5.87	81.87	24.18	11.13
HH	甬优4949 Yongyou 4949	238.39	246.23	5.87	82.33	23.90	11.03
高产氮中效	甬优2640 Yongyou 2640	234.00	221.41	5.18	85.70	24.20	10.69
HM	甬优4953 Yongyou 4953	237.08	224.75	5.33	86.04	23.67	10.62
中产氮中效	甬优6715 Yongyou 6715	218.27	215.33	4.70	81.35	28.65	9.77
MM	甬优6760 Yongyou 6760	219.08	214.78	4.71	82.02	28.47	9.76
	HH平均值 HH mean	239.71 a	244.82 a	5.87 a	82.10 b	24.04 b	11.08 a
	HM平均值 HM mean	235.54 a	223.08 b	5.26 b	85.87 a	23.83 b	10.65 b
	MM平均值 MM mean	218.68 b	215.05 c	4.71 c	81.68 b	28.56 a	9.77 c
2018
高产氮高效	甬优1662 Yongyou 1662	246.08	253.38	6.24	79.46	24.17	11.21
HH	甬优4949 Yongyou 4949	240.37	256.14	6.16	79.56	23.96	11.18
高产氮中效	甬优2640 Yongyou 2640	232.03	232.33	5.39	84.38	24.51	10.77
HM	甬优4953 Yongyou 4953	228.30	229.73	5.24	85.68	24.07	10.67
中产氮中效	甬优6715 Yongyou 6715	215.91	220.75	4.77	80.91	28.65	9.89
MM	甬优6760 Yongyou 6760	217.81	216.80	4.72	80.67	28.47	9.85
	HH平均值 HH mean	243.23 a	254.76 a	6.20 a	79.51 b	24.07 b	11.19 a
	HM平均值 HM mean	230.16 b	231.03 b	5.32 b	85.03 a	24.29 b	10.72 b
	MM平均值 MM mean	216.86 c	218.77 c	4.74 c	80.79 b	28.56 a	9.87 c

品种类型 Type	品种名称 Variety	株高 Plant height (cm)	高峰苗 Peak seeding (×10⁴ hm^-2)	单位面积穗数 No. of panicles (×10⁴ hm^-2)	成穗率 RPTT (%)
2017
高产氮高效	甬优1662 Yongyou 1662	110.4	347.06	241.03	69.45
HH	甬优4949 Yongyou 4949	111.8	349.49	238.39	68.21
高产氮中效	甬优2640 Yongyou 2640	114.5	351.42	234.00	66.59
HM	甬优4953 Yongyou 4953	116.6	352.78	237.08	67.20
中产氮中效	甬优6715 Yongyou 6715	122.6	357.97	218.27	60.97
MM	甬优6760 Yongyou 6760	121.8	358.65	219.08	61.08
	HH平均值 HH mean	111.10 b	348.27 c	239.71 a	68.83 a
	HM平均值 HM mean	115.55 b	352.10 b	235.54 a	66.89 a
	MM平均值 MM mean	122.20 a	358.31 a	218.68 b	61.03 b
2018
高产氮高效	甬优1662 Yongyou 1662	109.7	349.25	246.08	70.46
HH	甬优4949 Yongyou 4949	110.5	345.16	240.37	69.64
高产氮中效	甬优2640 Yongyou 2640	113.8	351.12	232.03	66.08
HM	甬优4953 Yongyou 4953	115.7	350.58	228.30	65.12
中产氮中效	甬优6715 Yongyou 6715	122.7	360.03	215.91	59.97
MM	甬优6760 Yongyou 6760	122.4	357.36	217.81	60.95
	HH平均值 HH mean	110.10 c	348.70 b	243.23 a	70.05 a
	HM平均值 HM mean	114.75 b	350.85 b	230.16 b	65.60 b
	MM平均值 MM mean	122.55 a	358.70 a	216.86 c	60.46 c

品种类型 Type	品种名称 Variety	氮素回收利用率 NRE (%)	氮素农学利用率 AE (kg kg^-1)	氮素生理利用率 PNUE (kg kg^-1)	氮肥偏生产力 PFP (kg kg^-1)	百千克籽粒需氮量 NRG (kg)
2017
高产氮高效	甬优1662 Yongyou 1662	45.16	18.81	41.65	41.23	2.19
HH	甬优4949 Yongyou 4949	44.22	18.6	42.05	40.85	2.2
高产氮中效	甬优2640 Yongyou 2640	39.13	15.88	40.58	39.61	2.17
HM	甬优4953 Yongyou 4953	39.38	15.99	40.61	39.34	2.17
中产氮中效	甬优6715 Yongyou 6715	42.42	14.79	34.87	36.19	2.38
MM	甬优6760 Yongyou 6760	43.16	15.09	34.96	36.15	2.39
	HH平均值 HH mean	44.69 a	18.70 a	41.85 a	41.04 a	2.19 b
	HM平均值 HM mean	39.26 b	15.94 b	40.60 b	39.47 b	2.17 c
	MM平均值 MM mean	42.79 a	14.94 c	34.92 c	36.17 c	2.38 a
2018
高产氮高效	甬优1662 Yongyou 1662	43.69	19.18	43.9	41.5	2.20
HH	甬优4949 Yongyou 4949	44.93	19.14	42.61	41.41	2.21
高产氮中效	甬优2640 Yongyou 2640	39.91	16.94	42.44	39.89	2.18
HM	甬优4953 Yongyou 4953	39.31	16.52	42.03	39.51	2.21
中产氮中效	甬优6715 Yongyou 6715	42.83	15.94	37.21	36.63	2.36
MM	甬优6760 Yongyou 6760	42.50	15.43	36.31	36.47	2.36
	HH平均值 HH mean	44.31 a	19.16 a	43.26 a	41.46 a	2.19 b
	HM平均值 HM mean	39.61 b	16.73 b	42.24 a	39.70 b	2.20 b
	MM平均值 MM mean	42.67 a	15.69 c	36.76 b	36.55 c	2.36 a

Differences in yield and nitrogen absorption and utilization of indica-japonica hybrid rice varieties of Yongyou series

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品种类型 Type	品种名称 Variety	叶面积指数 LAI			结实期叶面积衰减率 DRLA (LAI d^-1)
品种类型 Type	品种名称 Variety	拔节期 Jointing	抽穗期 Heading	成熟期 Maturity	结实期叶面积衰减率 DRLA (LAI d^-1)
2017
高产氮高效	甬优1662 Yongyou 1662	4.33	8.44	3.89	0.0771
HH	甬优4949 Yongyou 4949	4.35	8.42	3.84	0.0790
高产氮中效	甬优2640 Yongyou 2640	4.41	8.29	3.72	0.0816
HM	甬优4953 Yongyou 4953	4.37	8.32	3.75	0.0816
中产氮中效	甬优6715 Yongyou 6715	4.55	8.21	3.51	0.0940
MM	甬优6760 Yongyou 6760	4.49	8.18	3.49	0.0938
	HH平均值 HH mean	4.34 b	8.43 a	3.87 a	0.0780 c
	HM平均值 HM mean	4.39 b	8.31 b	3.73 b	0.0816 b
	MM平均值 MM mean	4.52 a	8.19 c	3.50 c	0.0939 a
2018
高产氮高效	甬优1662 Yongyou 1662	4.39	8.53	3.88	0.0816
HH	甬优4949 Yongyou 4949	4.37	8.57	3.81	0.0821
高产氮中效	甬优2640 Yongyou 2640	4.32	8.43	3.75	0.0836
HM	甬优4953 Yongyou 4953	4.35	8.39	3.79	0.0807
中产氮中效	甬优6715 Yongyou 6715	4.49	8.34	3.45	0.0959
MM	甬优6760 Yongyou 6760	4.52	8.31	3.46	0.0951
	HH平均值 HH mean	4.38 b	8.55 a	3.85 a	0.0818 b
	HM平均值 HM mean	4.34 b	8.41 b	3.77 a	0.0821 b
	MM平均值 MM mean	4.51 a	8.32 b	3.45 b	0.0955 a

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