播量对缩行带状滴灌燕麦抗倒伏能力和产量的影响

doi:10.3724/SP.J.1006.2024.41012

Abstract

Abstract:

This study aimed to determine the effects of seeding rate under reduced strip irrigation on the lodging resistance and yield of oat. Five seeding rates—90 kg hm^-2, 120 kg hm^-2, 150 kg hm^-2, 180 kg hm^-2, and 210 kg hm^-2 were tested on the lodging-resistant variety ‘Bayou 1’ and the easily lodging variety ‘Yanke 2’ from 2022 to 2023. We investigated the effects on physicochemical properties, lodging resistance, yield, and constituent factors of the oat stem base. The results showed that the plant height and center of gravity height of oat initially increased and then decreased with an increasing seeding rate. For ‘Bayou 1’, the highest plant height and center of gravity height were observed under the 150 kg hm^-2 treatment, increasing by 2.63%-13.36% and 1.49%-12.30% compared to other treatments, respectively. For ‘Yanke 2’, the highest values were under the 120 kg hm^-2 treatment, with increases of 2.52%-15.20% and 4.67%-21.21%, respectively. The second internode length of both oat varieties increased with seeding rate, while the course, dry weight, fullness, and bending resistance of the second internode decreased. Compared with other treatments, the 90 kg hm^-2 treatment showed increases of 1.76%-32.81% in coarse, 9.08%-125.89% in dry weight, 26.88%-292.64% in fullness, and 6.48%-129.70% in bending resistance. With higher seeding rates, the contents of cellulose, soluble sugar, C/N ratio, potassium, and silicon in the oat stem base decreased, while nitrogen content increased. Under the 90 kg hm^-2 treatment, these chemical components increased by 5.81%-74.10%, 1.62%-24.34%, 4.78%-55.41%, 1.90%-107.78%, and 2.00%-17.37%, respectively, whereas nitrogen content decreased by 2.95%-22.66%. Lodging rates and grades varied by year and variety. Lodging occurred in ‘Bayou 1’ and ‘Yanke 2’ under seeding rates of 180-210 kg hm^-2 and 150-210 kg hm^-2, respectively, with both varieties experiencing increased lodging in 2023 as seeding rates rose. The number of grains per ear and 1000-grain weight decreased with higher seeding rates, but grain yield initially increased and then decreased. The highest grain yields for ‘Bayou 1’ and ‘Yanke 2’ were achieved at 150 kg hm^-2 and 120 kg hm^-2, respectively. Correlation analysis indicated that the morphological characteristics and chemical composition of the stem base significantly affected its folding resistance, subsequently influencing lodging rate and grade. These factors can be key indices for evaluating oat lodging resistance. Considering lodging resistance and grain yield, the optimal seeding rates for ‘Bayou 1’ and ‘Yanke 2’ were 150 kg hm^-2 and 120 kg hm^-2, respectively.

Key words: stem base morphology, the content of chemical components in stem base, bending resistance, lodging rate, yield

YANG Zhi-Xue, LIU Jing-Hui, MI Jun-Zhen, SUN Jing, ZHAO Bao-Ping, REN Chang-Zhong, TIAN Lu, ZHENG Cheng-Zhong. Effect of seeding rates on lodging resistance and yield of oat under reduced strip drip irrigation[J].Acta Agronomica Sinica, 2024, 50(11): 2831-2447.

Figures/Tables 17

Fig. 1

Table 1

Fig. 2

Table 2

Effects of different seeding rate on plant height and ear height of oat"

年份 Year	品种 Variety	播量 Seeding rate	株高Plant height (cm)			重心高度 Height of center of gravity (cm)
年份 Year	品种 Variety	播量 Seeding rate	抽穗期 Heading stage	灌浆期 Filling stage	成熟期 Maturity stage	抽穗期 Heading stage	灌浆期 Filling stage	成熟期 Maturity stage
2022	BY1	S1	104.36±0.46 ef	104.05±0.56 d	102.74±2.87 f	53.51±3.91 de	54.85±0.72 de	53.07±1.86 cd
		S2	105.51±1.95 de	108.90±0.80 c	107.92±1.02 e	58.04±1.40 abc	58.51±0.99 b	56.62±1.25 bc
		S3	110.79±3.29 c	112.59±0.77 b	112.29±2.36 d	59.53±0.93 ab	59.90±0.70 b	59.27±1.23 b
		S4	106.62±0.29 de	107.70±0.61 c	106.96±1.24 e	56.69±0.53 bc	57.55±1.25 bc	56.87±2.25 bc
		S5	95.82±1.30 g	103.85±2.00 d	103.63±0.20 f	52.44±0.70 e	52.68±2.58 e	53.82±1.66 cd
	YK2	S1	115.08±2.44 b	115.32±2.31 b	115.23±0.89 c	53.30±0.42 de	58.50±1.74 b	56.54±0.34 bc
		S2	118.46±1.58 a	121.97±1.80 a	121.89±0.55 a	60.26±0.63 a	62.68±1.40 a	68.02±3.55 a
		S3	110.72±2.80 c	121.20±1.23 a	119.52±1.88 ab	56.09±0.46 cd	58.29±1.16 b	58.08±3.03 b
		S4	108.41±1.72 cd	120.44±2.09 a	117.23±0.21 bc	53.29±1.06 de	55.40±0.92 cd	53.56±3.11 cd
		S5	101.84±0.89 f	114.52±1.81 b	115.49±1.84 c	55.26±2.34 cde	54.84±0.31 de	52.41±1.14 d
2023	BY1	S1	105.82±3.58 d	109.93±2.36 cd	106.31±3.89 d	46.17±0.87 bc	48.85±1.32 ef	47.62±1.62 f
		S2	110.26±2.92 abc	112.05±0.69 abc	110.01±3.16 bc	47.70±1.56 bc	52.02±0.76 bcd	50.19±0.96 e
		S3	113.98±2.29 a	114.13±2.02 ab	115.94±0.76 a	49.09±0.53 ab	54.45±2.02 a	55.89±1.50 ab
		S4	107.61±0.90 cd	107.62±1.63 de	101.09±3.12 e	49.08±1.19 ab	50.25±0.81 de	51.27±1.03 de
		S5	104.58±2.47 d	104.51±3.57 e	97.94±2.42 e	45.98±1.35 c	48.04±1.12 f	46.47±0.58 f
	YK2	S1	108.43±2.08 bcd	111.13±0.82 bc	111.71±3.91 ab	47.60±1.26 bc	52.00±0.29 bcd	52.64±1.33 cd
		S2	112.78±0.52 a	115.05±0.39 a	116.33±1.50 a	50.33±1.37 a	53.94±1.62 ab	57.57±1.30 a
		S3	112.25±1.96 ab	112.42±0.60 abc	113.14±1.10 ab	49.05±0.41 ab	52.98±1.09 abc	55.50±0.39 b
		S4	105.34±2.47 d	105.85±2.47 e	108.71±1.94 bc	47.86±1.47 bc	51.18±0.54 cd	54.02±0.02 bc
		S5	104.15±1.93 d	104.30±1.24 e	105.90±1.80 d	47.72±1.14 bc	47.84±1.18 f	51.11±0.87 de
方差分析ANOVA
V			**	**	**	NS	*	**
S			**	**	**	**	**	**
V×S			**	NS	**	**	**	**

Table 2

Table 3

Effects of seeding rate on internode length and thickness of different oat stem bases"

年份Year	品种Variety	播量 Seeding rate	第二节间长 Second internode length (cm)			第二节间粗 Second internode diameter (mm)
年份Year	品种Variety	播量 Seeding rate	抽穗期 Heading stage	灌浆期 Filling stage	成熟期 Maturity stage	抽穗期 Heading stage	灌浆期 Filling stage	成熟期 Maturity stage
2022	BY1	S1	8.98±0.31 e	8.45±0.65 e	9.82±0.67 g	4.36±0.11 a	4.60±0.03 a	4.81±0.07 a
		S2	9.07±0.72 e	11.34±1.22 d	10.84±0.35 fg	4.23±0.12 ab	4.47±0.12 ab	4.67±0.10 a
		S3	10.71±1.05 d	12.42±0.94 d	12.29±0.17 de	4.13±0.14 b	4.24±0.14 cd	4.38±0.11 b
		S4	14.18±0.52 ab	15.73±0.67 abc	14.69±0.45 bc	3.88±0.05 c	3.90±0.09 e	4.08±0.14 cd
		S5	15.12±0.25 a	16.45±0.79 a	15.51±0.60 ab	3.68±0.04 d	3.68±0.14 f	3.78±0.12 e
	YK2	S1	10.63±0.51 d	11.94±0.34 d	11.83±0.29 ef	4.25±0.04 ab	4.42±0.09 abc	4.39±0.18 b
		S2	12.19±0.47 c	14.50±0.82 c	13.00±0.95 de	4.20±0.04 ab	4.38±0.08 bc	4.35±0.11 b
		S3	12.44±0.32 c	14.99±0.10 bc	13.41±0.40 cd	4.10±0.01 b	4.10±0.06 d	4.21±0.18 bc
		S4	13.80±0.47 b	16.06±0.20 ab	14.90±1.12 ab	3.82±0.08 cd	3.91±0.13 e	3.90±0.06 de
		S5	15.04±1.37 a	16.86±1.06 a	16.13±1.50 a	3.73±0.18 cd	3.69±0.13 f	3.69±0.13 e
2023	BY1	S1	5.80±0.61 e	6.71±0.99 e	6.20±0.17 g	4.33±0.17 a	4.34±0.02 a	4.14±0.24 a
		S2	7.00±0.74 e	8.13±0.97 de	9.02±0.62 de	4.31±0.11 a	3.95±0.07 b	3.92±0.14 ab
		S3	8.54±0.35 cd	10.92±0.82 bc	10.30±0.69 cd	4.29±0.07 a	3.61±0.11 cd	3.77±0.15 bc
		S4	9.69±0.63 bc	12.91±0.88 a	12.12±0.98 b	3.91±0.07 c	3.39±0.25 de	3.46±0.20 d
		S5	10.15±0.24 b	13.30±0.84 a	13.21±1.13 b	3.78±0.12 cd	3.20±0.09 ef	2.99±0.12 ef
	YK2	S1	6.50±0.55 e	7.00±0.95 de	7.22±0.07 fg	4.26±0.12 a	4.04±0.02 b	4.04±0.08 ab
		S2	8.28±1.38 d	8.78±1.54 d	8.62±1.03 ef	4.15±0.07 ab	3.94±0.12 b	3.88±0.13 abc
		S3	8.61±0.46 cd	10.57±0.60 c	11.64±0.64 bc	3.99±0.13 bc	3.68±0.14 c	3.62±0.26 cd
		S4	10.74±0.60 ab	12.46±1.56 ab	12.76±1.64 b	3.79±0.12 cd	3.38±0.22 de	3.17±0.09 e
		S5	11.83±0.52 a	14.11±0.60 a	15.78±0.50 a	3.64±0.22 d	3.03±0.07 f	2.82±0.05 f
方差分析ANOVA
V			**	**	**	**	*	**
S			**	**	**	**	**	**
V×S			*	*	NS	NS	NS	NS

Table 3

Table 4

Effects of seeding rate on internode dry weight and fullness of different oat stem bases"

年份 Year	品种 Variety	播量 Seeding rate	第二节间干重 Second internode dry weight (g)			第二节间充实度 Second internode fullness (mg cm^-1)
年份 Year	品种 Variety	播量 Seeding rate	抽穗期 Heading stage	灌浆期 Filling stage	成熟期 Maturity stage	抽穗期 Heading stage	灌浆期 Filling stage	成熟期 Maturity stage
2022	BY1	S1	0.37±0.20 a	0.29±0.02 a	0.27±0.02 ab	25.56±3.47 a	31.01±2.36 a	27.18±2.13 a
		S2	0.27±0.02 ab	0.24±0.03 abc	0.27±0.05 ab	20.42±0.35 bc	21.22±4.09 bc	24.65±3.73 a
		S3	0.23±0.03 b	0.22±0.01 cde	0.22±0.01 bc	16.27±2.51 cde	17.86±1.29 cd	17.99±0.46 b
		S4	0.21±0.01 b	0.18±0.01 de	0.20±0.03 c	11.87±1.15 ef	11.44±0.53 f	13.46±1.62 c
		S5	0.20±0.02 b	0.12±0.02 fg	0.13±0.03 e	10.78±1.20 f	7.27±1.07 gh	8.26±2.14 d
	YK2	S1	0.28±0.05 ab	0.28±0.04 ab	0.30±0.04 a	23.22±4.90 ab	23.11±3.32 b	25.12±2.95 a
		S2	0.26±0.02 ab	0.23±0.07 bcd	0.20±0.01 c	17.82±2.20 cd	15.75±3.75 de	15.16±0.86 bc
		S3	0.23±0.05 b	0.19±0.02 cde	0.19±0.02 cd	15.57±2.92 de	12.38±1.32 ef	13.83±1.16 c
		S4	0.22±0.01 b	0.17±0.00 ef	0.14±0.03 de	13.50±0.53 def	10.59±0.08 fg	9.51±2.53 d
		S5	0.19±0.03 b	0.10±0.02 g	0.11±0.02 e	11.01±1.49 f	6.18±0.87 h	6.63±0.94 d
2023	BY1	S1	0.15±0.06 a	0.20±0.01 a	0.19±0.01 a	24.94±2.08 a	30.86±5.80 a	31.28±0.70 a
		S2	0.13±0.01 a	0.19±0.01 ab	0.18±0.01 ab	22.85±2.59 a	22.93±1.49 bc	23.00±3.89 c
		S3	0.12±0.02 a	0.17±0.01 bc	0.17±0.00 b	15.31±1.10 bc	15.82±0.94 de	16.28±1.10 d
		S4	0.11±0.04 a	0.16±0.01 c	0.15±0.03 c	11.98±1.63 cde	12.16±0.70 ef	11.87±0.98 e
		S5	0.10±0.01 a	0.13±0.01 d	0.13±0.01 cd	10.12±1.11 de	9.86±0.45 f	9.87±1.50 e
	YK2	S1	0.12±0.02 a	0.18±0.02 ab	0.19±0.01 a	16.84±3.96 b	26.46±3.17 b	26.93±1.09 b
		S2	0.11±0.03 a	0.17±0.02 bc	0.19±0.02 ab	13.64±3.87 bcd	19.35±0.91 cd	21.62±3.66 c
		S3	0.11±0.03 a	0.16±0.01 c	0.18±0.01 ab	13.45±2.79 bcd	14.99±0.63 e	15.46±1.41 d
		S4	0.11±0.02 a	0.15±0.02 cd	0.14±0.01 c	10.49±1.66 de	11.96±1.97 ef	10.92±0.35 e
		S5	0.10±0.01 a	0.13±0.01 d	0.11±0.01 d	8.15±1.05 e	9.22±0.70 f	7.12±0.38 f
方差分析ANOVA
V			NS	*	**	*	**	**
S			*	**	**	**	**	**
V×S			NS	NS	NS	NS	**	NS

Table 4

Table 5

Fig. 3

Table 6

Fig. 4

Table 7

Effects of different seeding rate on soluble sugar content and nitrogen content of oats (%)"

年份Year	品种Variety	播量Seeding rate	可溶性糖含量Soluble sugar content			氮含量 Nitrogen content
年份Year	品种Variety	播量Seeding rate	抽穗期 Heading stage	灌浆期 Filling stage	成熟期 Maturity stage	抽穗期 Heading stage	灌浆期 Filling stage	成熟期 Maturity stage
2022	BY1	S1	7.16±0.29 a	6.21±0.09 a	6.73±0.27 a	0.69±0.02 c	0.67±0.01 e	0.67±0.01 d
		S2	6.47±0.13 b	6.07±0.10 b	6.21±0.14 b	0.74±0.06 bc	0.67±0.01 e	0.68±0.02 cd
		S3	5.92±0.15 cde	6.03±0.04 bc	5.65±0.09 c	0.76±0.03 bc	0.72±0.01 d	0.69±0.02 cd
		S4	5.69±0.17 de	5.81±0.19 efg	5.60±0.05 c	0.77±0.05 bc	0.75±0.02 c	0.70±0.02 bcd
		S5	5.63±0.31 de	5.70±0.06 fg	5.47±0.05 c	0.78±0.06 bc	0.79±0.03 b	0.71±0.00 bc
	YK2	S1	5.94±0.04 cd	5.98±0.08 bcd	6.08±0.18 b	0.76±0.04 bc	0.66±0.02 e	0.67±0.01 d
		S2	5.92±0.09 cde	5.92±0.05 bcde	6.06±0.12 b	0.79±0.02 b	0.71±0.01 d	0.69±0.02 cd
		S3	6.10±0.23 c	5.88±0.04 cde	5.64±0.04 c	0.80±0.03 b	0.75±0.01 c	0.71±0.03 bc
		S4	5.79±0.07 cde	5.84±0.03 def	5.56±0.02 c	0.82±0.04 b	0.79±0.01 b	0.73±0.03 ab
		S5	5.60±0.06 e	5.66±0.05 g	5.46±0.22 c	0.93±0.12 a	0.83±0.01 a	0.76±0.02 a
2023	BY1	S1	6.41±0.04 a	6.53±0.05 a	6.30±0.06 a	0.75±0.04 h	0.80±0.00 f	0.82±0.02 bcd
		S2	6.06±0.02 b	6.22±0.08 b	6.23±0.02 a	0.91±0.06 g	0.87±0.06 e	0.85±0.06 abcd
		S3	5.79±0.06 e	5.92±0.01 c	6.00±0.03 b	0.96±0.07 fg	0.91±0.03 de	0.90±0.02 abc
		S4	5.57±0.05 f	5.67±0.05 e	5.63±0.02 d	1.00±0.03 def	0.95±0.04 cd	0.91±0.05 ab
		S5	5.27±0.07 g	5.48±0.06 f	5.41±0.03 e	1.03±0.02 cde	0.98±0.06 bc	0.92±0.04 ab
	YK2	S1	6.03±0.03 bc	5.91±0.01 c	6.04±0.14 b	0.97±0.04 efg	0.88±0.01 e	0.77±0.01 d
		S2	5.97±0.06 cd	5.81±0.02 d	5.86±0.06 c	1.05±0.03 cd	1.00±0.05 abc	0.80±0.06 cd
		S3	5.90±0.03 d	5.73±0.03 e	5.67±0.08 d	1.08±0.02 bc	1.03±0.01 ab	0.85±0.01 abcd
		S4	5.62±0.02 f	5.36±0.04 g	5.38±0.03 e	1.12±0.01 b	1.03±0.02 ab	0.90±0.14 abc
		S5	5.31±0.02 g	5.17±0.02 h	5.16±0.03 f	1.18±0.04 a	1.05±0.03 a	0.95±0.02 a
方差分析ANOVA
V			**	**	**	**	**	NS
S			**	**	**	**	**	**
V×S			**	**	**	NS	NS	NS

Table 7

Table 8

Fig. 5

Table 9

Effects of different seeding rate on potassium and silicon content in oat stem base (%)"

年份Year	品种Variety	播量Seeding rate	K含量K content			Si含量Si content
年份Year	品种Variety	播量Seeding rate	抽穗期 Heading stage	灌浆期 Filling stage	成熟期 Maturity stage	抽穗期 Heading stage	灌浆期 Filling stage	成熟期 Maturity stage
2022	BY1	S1	3.97±0.21 a	3.87±0.21 a	3.03±0.32 a	3.70±0.09 a	3.90±0.02 a	3.81±0.05 a
		S2	3.83±0.49 ab	3.50±0.10 bc	2.97±0.21 ab	3.61±0.04 b	3.48±0.05 b	3.69±0.03 b
		S3	3.33±0.15 bcde	3.40±0.00 bc	2.63±0.06 bcd	3.60±0.03 b	3.42±0.02 bc	3.68±0.02 b
		S4	2.93±0.32 e	3.27±0.06 c	2.37±0.25 de	3.33±0.03 cd	3.22±0.03 e	3.57±0.05 c
		S5	2.80±0.17 e	2.33±0.12 e	2.07±0.12 ef	3.28±0.02 de	3.09±0.05 g	3.21±0.02 f
	YK2	S1	3.70±0.30 abc	3.60±0.26 ab	2.90±0.30 abc	3.38±0.03 c	3.35±0.03 cd	3.55±0.03 c
		S2	3.57±0.06 abcd	3.23±0.25 cd	2.57±0.21 cd	3.33±0.01 cd	3.32±0.07 d	3.47±0.01 d
		S3	3.17±0.32 cde	2.97±0.15 d	2.30±0.10 def	3.23±0.02 e	3.15±0.01 f	3.35±0.03 e
		S4	3.10±0.46 de	2.50±0.10 e	1.97±0.06 f	3.12±0.03 f	3.08±0.04 g	3.18±0.04 f
		S5	2.83±0.06 e	1.77±0.15 f	1.57±0.12 g	3.01±0.05 g	3.00±0.02 h	2.97±0.05 g
2023	BY1	S1	3.18±0.23 a	2.70±0.14 a	2.42±0.05 a	3.71±0.13 a	3.92±0.04 a	3.97±0.04 a
		S2	3.17±0.17 a	2.56±0.06 abc	2.07±0.19 bc	3.41±0.06 bc	3.83±0.05 b	3.84±0.12 b
		S3	2.64±0.10 bcd	2.51±0.03 bc	1.83±0.08 de	3.54±0.03 ab	3.76±0.06 b	3.76±0.05 bc
		S4	2.46±0.04 de	2.51±0.06 bcd	1.73±0.10 ef	3.29±0.03 cd	3.63±0.03 cd	3.73±0.03 cd
		S5	2.32±0.07 e	2.36±0.11 d	1.29±0.22 g	3.23±0.09 de	3.61±0.02 cd	3.66±0.02 d
	YK2	S1	3.11±0.05 a	2.63±0.04 ab	2.22±0.13 ab	3.55±0.05 ab	3.79±0.07 b	3.77±0.06 bc
		S2	2.85±0.26 b	2.41±0.11 cd	1.96±0.04 cd	3.42±0.07 bc	3.68±0.04 c	3.69±0.03 cd
		S3	2.75±0.10 bc	2.06±0.03 e	1.63±0.07 ef	3.31±0.01 cd	3.56±0.04 d	3.64±0.07 d
		S4	2.56±0.12 cde	1.93±0.07 ef	1.54±0.10 f	3.15±0.03 de	3.48±0.03 e	3.46±0.04 e
		S5	2.39±0.13 de	1.79±0.12 f	0.96±0.08 h	3.09±0.23 e	3.45±0.01 e	3.38±0.06 e
方差分析ANOVA
V			NS	**	**	**	**	**
S			**	**	**	**	**	**
V×S			NS	**	NS	NS	**	**

Table 9

Table 10

Table 11

Table 12

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年份 Year	pH	有机质 Organic matter (g kg^-1)	全氮 Total nitrogen (g kg^-1)	全磷 Total phosphorus (mg kg^-1)	全钾 Total potassium (g kg^-1)	碱解氮 Alkali hydrolyzed nitrogen (mg kg^-1)	速效磷 Available phosphorus (mg kg^-1)	速效钾 Available potassium (mg kg^-1)
2022	8.01	27.60	2.02	535.67	18.70	121.33	5.13	241.67
2023	7.96	28.35	2.98	528.56	16.88	134.25	6.06	237.23

年份 Year	品种 Variety	播量 Seeding rate	收获穗数 Spike (×10⁴ hm^-2)	穗粒数 Kernel number per spike	千粒重 Thousand-grain weight (g)	籽粒产量 Grain yield (kg hm^-2)
2022	BY1	S1	481.33±32.02 de	84.11±1.92 ab	23.01±0.23 a	4100.02±173.21 bcd
		S2	530.67±21.20 bcd	77.22±11.65 bc	20.57±0.15 b	4266.69±57.74 b
		S3	546.00±22.72 bc	69.33±3.67 cd	20.30±0.42 b	4500.02±100.00 a
		S4	651.67±11.93 a	60.11±10.12 de	19.33±0.57 c	4166.69±152.75 bc
		S5	679.67±31.79 a	49.34±7.64 e	18.47±0.42 d	4033.35±57.74 cde
	YK2	S1	412.67±8.08 f	94.78±7.67 a	22.43±0.37 a	3953.85±68.62 de
		S2	483.33±28.59 de	79.78±3.87 bc	20.88±0.37 b	4143.02±60.44 bc
		S3	453.67±41.96 ef	76.34±4.51 bc	20.71±0.47 b	4035.85±23.42 cde
		S4	513.67±47.82 cd	67.00±9.68 cd	19.47±0.30 c	3886.29±22.01 e
		S5	570.67±20.03 b	57.22±2.80 de	17.96±0.32 d	3703.89±123.33 f
2023	BY1	S1	434.67±27.06 c	80.22±5.09 b	23.73±0.95 a	4148.79±92.50 cd
		S2	489.33±80.65 bc	69.67±3.00 c	22.79±0.99 a	4219.89±101.61 bc
		S3	533.67±13.58 ab	64.67±6.84 c	22.16±1.87 ab	4387.92±39.51 a
		S4	542.67±3.79 ab	52.56±5.50 d	20.14±0.43 cd	4043.75±72.81 d
		S5	592.67±39.17 a	47.56±1.17 d	19.16±0.87 de	3867.82±122.71 e
	YK2	S1	484.00±12.12 bc	90.00±3.33 a	21.11±0.54 bc	4133.85±68.62 cd
2023	YK2	S2	546.67±30.62 ab	86.34±5.13 ab	20.21±1.18 cd	4363.02±60.44 ab
		S3	511.33±11.15 b	67.56±3.36 c	19.84±0.36 cd	4025.85±23.42 bc
		S4	537.00±22.61 ab	47.78±4.17 d	18.65±0.22 de	3816.29±22.01 d
		S5	592.67±16.86 a	45.00±8.74 d	17.71±0.36 e	3653.89±123.33 e
方差分析ANOVA
V			**	**	**	**
S			**	**	**	**
V×S			*	NS	NS	*

指标 Item	抗折力 Stem bending resistance	倒伏率 Lodging rate	籽粒产量 Grain yield
株高Plant height	0.22	-0.23	0.22
重心高度Height of center of gravity	-0.06	-0.51^**	0.29^*
基部第二节间长The second internode length	-0.76^**	0.32^*	-0.51^**
基部第二节间粗The second internode stem diameter	0.54^**	-0.82^**	0.43^**
基部第二节间干重The second internode dry weight	0.77^**	-0.66^**	0.40^**
基部第二节间充实度The second internode fullness	0.27^*	-0.72^**	0.40^**
纤维素含量 Cellulose content	0.50^**	-0.51^**	0.40^**
可溶性糖Soluble sugar content	0.62^**	-0.72^**	0.43^**
氮含量N content	-0.13	0.74^**	-0.14
碳氮比 C/N	0.32^*	-0.82^**	0.25
钾含量K content	0.24	-0.71^**	0.30^*
硅含量Si content	0.75^**	-0.40^**	0.56^**
抗折力Stem bending resistance	—	-0.48^**	0.57^**
倒伏率 Lodging rate	-0.48^**	—	-0.58^**

Effect of seeding rates on lodging resistance and yield of oat under reduced strip drip irrigation

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年份 Year	品种 Variety	播种量 Seeding rate	倒伏时期 Stage of lodging	倒伏面积 Lodging area (%)	倒伏分级 Lodging grade
2022	BY1	S1	—	0±0 f	0
		S2	—	0±0 f	0
		S3	—	0±0 f	0
		S4	成熟期Maturity stage	13.29±13.29 e	1
		S5	成熟期Maturity stage	23.75±23.75 d	2
	YK2	S1	—	0±0 f	0
		S2	—	0±0 f	0
		S3	灌浆期Filling stage	27.29±27.29 c	2
		S4	灌浆期Filling stage	53.36±53.36 b	3
		S5	灌浆期Filling stage	82.31±82.31 a	3
2023	BY1	S1	灌浆期Filling stage	13.33±2.89 e	1
		S2	灌浆期Filling stage	25.00±5.00 d	2
		S3	灌浆期Filling stage	33.33±2.89 d	2
		S4	灌浆期Filling stage	51.67±7.64 c	3
		S5	灌浆期Filling stage	68.33±2.89 b	3
	YK2	S1	灌浆期Filling stage	23.33±2.89 d	2
	YK2	S2	灌浆期Filling stage	30.00±10.00 d	2
2023	YK2	S3	抽穗期Heading stage	60.00±10.00 bc	3
		S4	抽穗期Heading stage	88.33±2.89 a	3
		S5	抽穗期Heading stage	95.00±0.00 a	3
方差分析ANOVA
V				**
S				**
V×S				**

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