迟播和密度对不同油菜品种抗倒伏及产量的影响

doi:10.3724/SP.J.1006.2023.24248

Abstract

Abstract:

To study the effects of late sowing and density on the lodging resistance and yield of rapeseed, and to provide the theoretical and technical support for the mechanized production of rapeseed, using three canola varieties (Shaanyou 28, Qinyou 28, and Qinyou 7) as the experimental materials, three sowing dates (T1: September 24, T2: October 1, and T3: October 8), and three densities (D1: 225,000 plants hm^-2, D2: 450,000 plants hm^-2, and D3: 675,000 plants hm^-2) were set up to analyze the yield and constituent factors, the indexes related to lodging, the main components of the stem and the microstructure of the stem. The results showed that: (1) Under T1 and T2 treatments, with the increase of plant density, the yield of each plant of the three varieties decreased, the group yield increased first and then decreased, the lodging index decreased first and then increased, the vascular bundle and stem cross-sectional area decreased, the vascular bundle area/stem cross-sectional area, stem lignin, and cellulose content increased first and then decreased, the group yield was the largest at D2, while the lodging index was the smallest, and the yield and lodging resistance increased synergistically. Under the late sowing condition (T3), with the increase of density, the yield, lodging index, stem lignin, and cellulose content, above-ground fresh weight, vascular bundle area, stem cross-sectional area, and their ratios of the three cultivars decreased significantly, the group yield and lodging resistance increased, the lignin content was significantly positively correlated with the lodging resistance of stems, and the population yield and material resistance reached the maximum at D3. Compared with the normal sowing period (T1), the effective pods per plant, seeds per pod, yield per plant, population yield, and above-ground fresh weight the lodging index of each plant decreased significantly under the late sowing condition (T3), but the lodging resistance was enhanced. (2) Under the normal sowing period (T1), when the yield of the three variety groups was the highest, planting density was 450,000 plants hm^-2. When the sowing date was delayed from T1 to T3, the yield of the three varieties was the highest at the density of 675,000 plants hm^-2, among which Shaanyou 28 had the best density tolerance and late sowing resistance. In conclusion, under the late sowing condition, selecting dense and late sowing tolerant varieties and moderately increasing the density can compensate for the lack of yield, significantly increase the lignin and cellulose content of the stem, enhance the lodging resistance of rapeseed, effectively coordinate the contradiction between high yield and lodging, and achieve high yield and lodging resistance of late sowing rapeseed by compensating late with dense.

Key words: rapeseed, sowing date, planting density, yield, lodging resistance

GONG Ruo-Lin, SONG Bo, YANG Zhi-Ye, LU Li-Jing, DONG Jun-Gang. Effects of sowing date and density on lodging resistance and yield of different rapeseed cultivars[J].Acta Agronomica Sinica, 2023, 49(10): 2777-2792.

Figures/Tables 11

Table 1

Fig. 1

Table 2

Effects of different sowing dates and planting densities on rapeseed agronomic characters"

品种 Variety	播期 Sowing date	密度 Density	根颈粗 Thick rhizome (mm)	株高 Plant height (cm)	分枝高度Branch height (cm)	主花序长度 Main inflorescence length (cm)	地下干重Underground dry weight (g)	地上干重 Dry weight above ground (g)
2019-2020
S28	T1	D1	25.37 ab	183.85 c	78.31 j	58.28 f	5.42 a	112.17 b
		D2	23.92 cd	178.35 de	79.81 hi	54.89 hi	5.07 ab	100.30 de
		D3	23.17 def	174.47 f	82.40 ef	53.41 j	4.90 abc	96.99 e
	T2	D1	24.17 cd	168.92 gh	77.85 j	53.96 ij	4.71 abcde	105.22 c
		D2	23.31 cde	166.42 hi	78.26 j	51.41 kl	4.36 bcdefg	101.66 d
		D3	23.30 cde	159.12 j	80.74 gh	50.49 lm	4.00 efghi	97.44 e
	T3	D1	19.27 i	153.02 k	78.87 ij	49.88 m	3.99 efghi	88.56 g
		D2	22.30 efgh	149.30 l	82.45 ef	51.83 k	4.36 bcdefg	92.53 f
		D3	23.74 cd	141.13 n	84.16 cd	52.17 k	4.62 cde	98.88 de
Q28	T1	D1	25.70 a	188.20 b	75.09 l	64.06 c	5.10 ab	115.81 a
		D2	24.39 bc	184.58 c	76.28 k	58.80 ef	4.84 abcd	97.78 e
		D3	23.35 cde	176.89 ef	79.76 hi	55.77 gh	4.39 bcdefg	85.80 g
	T2	D1	24.17 cd	171.26 g	78.57 j	59.68 e	4.75 abcde	100.60 de
		D2	24.05 cd	168.07 hi	80.76 gh	56.07 g	4.48 bcdefg	92.60 f
		D3	21.69 gh	165.16 i	81.66 fg	53.91 ij	4.24 cdefgh	88.82 g
	T3	D1	19.75 i	152.68 k	79.74 hi	51.01 kl	4.07 defghi	72.14 j
		D2	21.30 h	149.20 l	83.20 de	52.19 k	4.35 bcdefg	77.92 i
		D3	22.07 fgh	142.51 mn	85.11 bc	55.30 gh	4.56 bcdef	80.51 hi
Q7	T1	D1	25.46 ab	193.15 a	81.71 fg	66.36 b	5.12 ab	115.14 ab
		D2	24.39 bc	185.98 bc	80.90 gh	67.54 a	4.77 abcde	97.23 e
		D3	23.10 def	180.95 d	83.48 de	63.77 c	4.25 cdefgh	81.53 h
	T2	D1	24.01 cd	176.07 ef	80.05 h	63.21 c	4.05 defghi	97.48 e
		D2	23.93 cd	152.69 k	82.66 ef	61.45 d	3.81 fghi	85.65 g
		D3	23.28 cde	144.29 m	85.96 b	57.99 f	3.56 hi	70.17 jk
	T3	D1	22.38 efgh	160.89 j	83.77 d	53.48 j	3.33 i	68.62 k
		D2	22.52 efg	143.67 mn	85.81 b	54.00 ij	3.49 hi	70.93 jk
		D3	22.34 efgh	134.41 o	89.06 a	53.90 ij	3.61 ghi	79.37 hi
2020-2021
S28	T1	D1	22.44 a	180.17 bc	76.25 fghij	58.23 def	4.67 a	94.65 b
		D2	21.41 b	174.62 def	78.12 bcde	55.65 ghij	4.37 bc	85.66 efg
		D3	20.79 c	164.71 hi	78.41 bcd	52.81 l	3.81 fg	80.60 hij
	T2	D1	21.49 b	169.46 fgh	75.64 ghijk	57.77 def	4.69 a	87.23 def
		D2	20.54 c	162.69 i	76.50 efghi	54.51 ijk	4.50 ab	74.69 k
		D3	18.90 e	156.47 j	76.61 defghi	53.25 kl	3.92 ef	67.86 m
	T3	D1	19.00 e	148.23 kl	75.37 hijk	53.21 kl	3.72 fgh	72.85 kl
		D2	20.51 c	152.76 jk	75.92 ghijk	54.08 jkl	4.17 cd	77.75 j
		D3	21.17 b	147.74 kl	76.51 efghi	55.80 ghi	4.53 ab	86.52 efg
Q28	T1	D1	19.64 d	183.12 ab	74.25 kl	60.26 b	4.21 cd	96.02 b
		D2	18.63 ef	176.89 cd	75.43 hijk	57.93 def	3.83 fg	84.69 fg
		D3	17.89 g	173.74 def	76.83 defgh	56.67 fgh	3.59 hij	78.07 ij
Q28	T2	D1	18.74 e	172.03 defg	71.31 m	58.46 cde	3.83 fg	90.54 c
		D2	17.49 h	163.84 i	73.60 l	56.71 fgh	3.66 ghi	86.13 efg
		D3	16.76 jk	156.13 j	74.53 jkl	55.22 hij	3.52 ijk	70.82 lm
	T3	D1	17.04 ij	149.04 kl	71.56 m	54.50 ijk	3.31 lm	64.20 n
		D2	17.54 h	152.58 jk	73.21 l	55.37 ghij	3.65 ghi	72.84 kl
		D3	18.34 f	156.28 j	74.82 ijkl	56.11 ghi	3.87 efg	83.56 gh
Q7	T1	D1	17.18 hi	187.28 a	78.14 bcde	63.40 a	4.05 de	101.31 a
		D2	17.09 ij	175.70 cde	78.67 bc	60.42 c	3.73 fgh	90.92 c
		D3	15.90 mn	171.08 efg	80.66 a	58.44 cde	3.74 fgh	80.94 hi
	T2	D1	16.87 ij	167.52 ghi	77.30 cdefg	60.49 b	3.85 efg	96.56 b
		D2	16.22 lm	156.54 j	78.34 bcde	59.82 bc	3.70 fghi	88.32 cde
		D3	15.92 mn	152.35 jk	79.49 ab	58.13 def	3.38 kl	68.68 m
	T3	D1	15.43 o	146.33 l	75.65 ghijk	56.93 efg	3.15 m	70.23 lm
		D2	15.72 no	150.00 kl	77.75 bcdef	59.05 bcd	3.40 jkl	81.03 hi
		D3	16.43 kl	155.90 j	78.01 bcdef	60.43 b	3.79 fgh	90.27 cd
品种V			**	**	**	**	**	**
播期T			**	**	**	**	**	**
种植密度D			**	**	**	**	NS	**
V×T			**	**	**	**	*	**
V×D			**	**	NS	**	NS	**
T×D			**	**	**	**	**	**
V×T×D			**	**	**	**	NS	**
品种V			**	**	**	**	**	**
播期T			**	**	**	**	**	**
种植密度D			**	**	**	**	**	**
V×T			**	**	NS	*	**	**
V×D			**	*	NS	NS	**	**
T×D			**	**	NS	**	**	**
V×T×D			**	NS	NS	NS	**	**

Table 2

Table 3

Effects of different sowing dates and planting densities on rapeseed yield and yield composition"

年份 Year	品种 Variety	播期 Sowing date	密度 Density	单株角果数Effective pods per plant	每角果粒数 Seeds per pod	千粒重 1000-seed weight (g)	单株产量 Yield per plant (g)	实收产量 Yield (kg hm^-2)
2019-2020	S28	T1	D1	266.05 a	21.73 a	4.37 a	23.08 a	3766.47 b
			D2	191.04 g	20.90 b	4.07 b	14.58 d	4271.16 a
			D3	105.97 n	20.27 cd	3.97 bc	7.67 h	3290.40 c
		T2	D1	257.88 b	20.79 b	3.98 bc	19.20 b	2951.13 de
			D2	175.49 i	20.08 de	3.80 cde	12.06 e	3246.03 c
			D3	100.51 opq	19.41 ghij	3.72 defg	6.61 ij	2647.15 fgh
		T3	D1	189.50 g	19.66 efg	3.56 ghij	12.09 e	1906.04 klm
			D2	144.53 k	19.43 fghi	3.38 ijklm	8.52 g	2372.30 hi
			D3	96.33 q	18.49 lm	3.36 jklmn	5.46 kl	2503.15 ghi
	Q28	T1	D1	250.45 c	21.41 a	3.99 bc	19.55 b	3071.99 cd
			D2	196.24 f	20.05 de	3.96 bc	14.22 d	3959.96 b
			D3	101.26 op	19.58 fgh	3.90 bcd	6.96 hi	2916.53 def
		T2	D1	243.15 d	19.88 def	3.86 bcd	17.16 c	2744.31 efg
			D2	172.86 i	19.36 ghij	3.55 ghij	10.74 f	3235.41 c
			D3	98.73 pq	18.78 klm	3.48 hijkl	6.01 jk	2280.73 ij
		T3	D1	176.70 hi	19.44 fghi	3.26 lmno	10.26 f	1653.44 m
			D2	126.63 l	18.98 jkl	3.16 no	6.95 hi	1900.72 klm
			D3	96.43 q	17.91 m	3.10 o	4.91 lm	2058.85 jk
	Q7	T1	D1	229.48 e	20.86 b	3.79 cdef	16.61 c	2560.91 ghi
			D2	180.15 h	20.63 bc	3.59 efghi	12.23 e	3314.77 c
			D3	103.60 no	19.44 fghi	3.40 ijklm	6.19 ijk	2531.39 ghi
		T2	D1	187.37 g	20.59 bc	3.57 fghij	12.57 e	1917.35 klm
			D2	142.59 k	19.74 efg	3.50 ghijk	9.04 g	2497.28 ghi
			D3	91.38 r	19.14 hijk	3.32 klmn	5.22 lm	2043.14 jk
		T3	D1	164.39 j	19.10 ijk	3.63 efgh	10.60 f	1676.16 m
			D2	115.35 m	18.58 lm	3.47 hijkl	6.55 ij	1739.68 lm
			D3	87.02 s	18.00 m	3.25 mno	4.54 m	1976.85 kl
2020-2021	S28	T1	D1	242.70 a	20.58 a	4.26 a	19.28 a	3062.74 a
			D2	172.11 cd	19.58 de	3.81 bc	11.38 d	3284.82 a
			D3	94.89 ij	18.74 gh	3.80 bc	6.02 hij	2415.76 bc
		T2	D1	239.71 a	19.85 cd	3.69 d	15.64 b	2376.56 bc
			D2	159.16 e	19.24 ef	3.53 ef	9.60 ef	2558.25 b
			D3	90.48 jk	18.48 ghi	3.47 g	5.19 jkl	2005.97 def
		T3	D1	180.18 c	19.42 e	3.26 j	10.33 e	1636.10 hijk
			D2	139.24 f	18.19 ijk	3.16 lm	6.71 h	1826.40 fghi
2020-2021			D3	86.29 jkl	17.56 m	3.14 m	4.29 mno	1975.98 defg
	Q28	T1	D1	232.13 ab	20.25 ab	3.81 b	16.18 b	2568.00 b
			D2	177.51 c	19.28 ef	3.76 bc	11.37 d	3281.50 a
			D3	93.02 jk	18.56 ghi	3.75 cd	5.75 ij	2367.90 bc
		T2	D1	232.63 ab	19.19 ef	3.80 bc	15.50 b	2503.75 b
			D2	158.22 e	18.60 ghi	3.38 hi	8.98 fg	2611.15 b
			D3	88.33 jkl	17.86 klm	3.33 i	4.84 klm	2087.25 de
		T3	D1	162.40 de	18.87 fg	3.12 m	8.68 g	1348.63 lm
			D2	116.39 gh	17.98 jkl	2.93 o	5.50 jk	1400.61 klm
			D3	83.08 jkl	17.02 n	2.83 p	3.63 o	1637.36 hijk
	Q7	T1	D1	223.22 b	20.02 bc	3.58 e	14.52 c	2222.13 cd
			D2	162.93 de	19.17 ef	3.40 h	9.61 ef	2613.72 b
			D3	84.29 jkl	18.61 ghi	3.25 jk	4.55 lmn	1861.85 efgh
		T2	D1	172.50 cd	19.30 e	3.26 j	9.77 ef	1431.02 klm
			D2	123.12 g	18.38 hij	3.13 m	6.45 hi	1745.68 ghij
			D3	80.55 kl	17.66 lm	3.06 n	3.86 no	1518.82 jklm
		T3	D1	152.99 e	18.22 ijk	3.49 fg	8.96 fg	1307.36 m
			D2	106.15 hi	17.45 m	3.25 jk	5.19 jkl	1433.84 klm
			D3	75.87 l	16.95 n	3.20 kl	3.69 o	1595.42 ijkl
2019-2020		品种V		**	**	**	**	**
		播期T		**	**	**	**	**
		种植密度D		**	**	**	**	**
		V×T		**	**	**	**	**
		V×D		**	NS	NS	**	NS
		T×D		**	NS	NS	**	**
		V×T×D		**	*	NS	**	*
2020-2021		品种V		**	**	**	**	**
		播期T		**	**	**	**	**
		种植密度D		**	**	**	**	**
		V×T		**	**	**	**	**
		V×D		**	NS	NS	**	NS
		T×D		**	NS	*	**	**
		V×T×D		**	NS	**	**	NS

Table 3

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Table 4

Table 5

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品种 Variety	播期 Sowing date	密度 Density	2019-2020			2020-2021
品种 Variety	播期 Sowing date	密度 Density	生育期 Growth days (d)	有效积温 Effective accumulated temperature (℃)	降雨量 Rainfall (mm)	生育期 Growth days (d)	有效积温 Effective accumulated temperature (℃)	降雨量 Rainfall (mm)
S28	T1	D1	248	2860.4	109.6	248	2111.7	116.8
		D2	246	2806.1	109.6	246	2067.2	116.8
		D3	244	2759.2	66.4	244	2025.3	116.8
	T2	D1	239	2677.5	109.6	239	1942.8	115.8
		D2	238	2650.4	109.6	238	1921.9	115.8
		D3	237	2626.1	66.4	237	1900.6	115.8
	T3	D1	231	2521.7	109.6	231	1825.1	108.1
		D2	229	2470.5	109.6	229	1787.2	108.1
		D3	228	2443.1	66.4	227	1751.1	107.1
Q28	T1	D1	240	2677.6	109.6	240	1930.3	115.8
		D2	238	2521.9	109.6	238	1805.7	114.8
		D3	237	2375.3	66.4	237	1692.5	107.1
	T2	D1	233	2635.3	109.6	233	1892.6	115.8
		D2	231	2479.6	109.6	231	1786.6	114.8
		D3	230	2350.5	66.4	230	1675.2	107.1
	T3	D1	225	2610.5	109.6	225	1875.3	115.8
		D2	224	2454.8	109.6	224	1768.0	114.8
		D3	222	2296.6	66.4	222	1643.9	107.1
Q7	T1	D1	250	2942.7	109.6	250	2163.2	117.8
		D2	248	2886.5	109.6	248	2111.7	116.8
		D3	246	2833.2	66.4	246	2067.2	116.8
	T2	D1	241	2730.8	109.6	241	1987.1	115.8
		D2	240	2704.7	109.6	240	1964.4	115.8
		D3	238	2650.4	66.4	237	1900.7	115.8
	T3	D1	236	2654.7	109.6	237	1963.1	109.1
		D2	235	2626.5	109.6	235	1911.6	108.1
		D3	234	2600.4	66.4	234	1888.8	108.1

相关系数 Correlation index	木质素 Lignin	纤维素 Cellulose	倒伏指数 Lodging index	茎秆抗折力 Stem mechanical strength
木质素Lignin	1.000
纤维素Cellulose	0.821	1.000
倒伏指数Lodging index	0.766^**	-0.404^**	1.000
茎秆抗折力Stem mechanical strength	0.813^**	0.766^**	-0.791^**	1.000

Effects of sowing date and density on lodging resistance and yield of different rapeseed cultivars

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处理 Treatment		木质素Lignin					纤维素Cellulose
处理 Treatment		初花期 Initial blooming stage	终花期 Final flowering stage	角果期 Silique stage		成熟期 Maturity stage	初花期 Initial blooming stage	终花期 Final flowering stage	角果期 Silique stage	成熟期 Maturity stage
2019-2020	品种V	**	**		**	**	**	**	**	**
2019-2020	播期T	**	**		**	**	**	**	**	**
	种植密度D	**	**		**	**	NS	**	**	**
	V×T	NS	NS		NS	NS	NS	NS	NS	NS
	V×D	NS	NS		NS	**	NS	*	NS	NS
	T×D	*	**		NS	*	NS	*	NS	*
	V×T×D	NS	NS		NS	NS	NS	NS	NS	NS
2020-2021	品种V	**	**		**	**	**	**	**	**
2020-2021	播期T	**	**		**	**	**	**	**	**
	种植密度D	**	**		**	**	**	**	**	**
	V×T	**	NS		NS	NS	**	**	NS	NS
	V×D	**	**		**	**	**	**	NS	**
	T×D	**	**		**	**	**	**	**	**
	V×T×D	**	**		**	NS	NS	**	NS	*

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