Effects of Row Spacing and Chlormequat Chloride on Lodging and Yield of Foxtail Millet in Southeast Shanxi

doi:10.7668/hbnxb.20196036

Abstract

Abstract:

To investigate the effects of row spacing and chlormequat chloride application on lodging resistance and yield performance of foxtail millet in Southeastern Shanxi,a two-factor randomized block design was employed,utilizing Jingu 21 as the experimental material.The experimental design included three row spacing levels(30,40,and 50 cm,designated as D30,D40,and D50,respectively)and three chlormequat chloride treatment regimes:spraying with water only(CK),single application at the six-leaf stage(T1),and sequential applications at both the six-and eight-leaf stages(T2).This resulted in a total of nine treatment combinations.The study evaluated the impacts of these treatments on stem morphological characteristics,lodging incidence,grain yield,and its component traits.Results showed that chlormequat chloride application under varying row spacing conditions significantly improved stem breaking resistance while significantly reducing plant height,center-of-gravity height,and field lodging rate.The D40+T2 treatment exhibited the highest stem breaking resistance(94.59 N)and concurrently achieved the lowest values for plant height(161.53 cm),center-of-gravity height(80.3 cm),and lodging rate(16.31%).In terms of yield,as row spacing increased,the yield of CK,T1,and T2 treatments all showed a decreasing trend.Among them,the D30+T1 treatment achieved the highest yield of 4 923.83 kg/ha.Correlation analysis indicated that under different row spacing and chlormequat treatments,millet yield was mostly positively correlated with plant height and panicle traits,while consistently negatively correlated with lodging rate.This demonstrates that optimizing row spacing and chlormequat application can effectively regulate key agronomic traits.In conclusion,optimizing row spacing along with appropriate chlormequat treatment can effectively minimize the risk of lodging while maintaining yield.The D30+T1 treatment demonstrated superior overall performance and is therefore recommended for broader adoption in foxtail millet cultivation in Southeastern Shanxi.

Key words: Foxtail millet, Row spacing, Chlormequat chloride, Lodging, Yield

CLC Number:

GUO Wei. Effects of Row Spacing and Chlormequat Chloride on Lodging and Yield of Foxtail Millet in Southeast Shanxi[J]. Acta Agriculturae Boreali-Sinica, 2026, 41(1): 105-110. doi: 10.7668/hbnxb.20196036.

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References 21

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处理 Treatment		穗长/cm Panicle length	穗粗/cm Panicle diameter	单穗质量/g Weight per ear	穗粒质量/g Grain weight per ear	千粒质量/g 1000-grain weight	产量/(kg/hm²) Yield
D30	CK	21.99±0.87a	2.66±0.08a	26.40±1.64ab	20.65±0.80ab	3.03±0.13a	4 844.52±90.88a
	T1	23.09±1.48a	2.70±0.22a	28.49±2.04a	21.57±1.09a	3.03±0.29a	4 923.83±120.80a
	T2	21.13±1.37a	2.77±0.30a	25.18±0.38b	19.39±0.29b	3.12±0.21a	4 497.82±15.04b
D40	CK	22.74±1.50ab	2.72±0.19a	26.47±1.50a	20.70±0.80a	2.92±0.09a	4 696.93±48.48a
	T1	24.00±1.69a	2.73±0.13a	26.13±1.25a	19.78±0.40ab	3.00±0.08a	4 571.51±245.43ab
	T2	20.91±1.08b	2.78±0.11a	25.07±0.87a	19.30±0.77b	2.97±0.16a	4 265.30±160.71b
D50	CK	23.41±0.86a	2.68±0.09a	25.73±1.75a	19.81±1.33a	2.91±0.14a	4 351.50±138.55a
	T1	23.73±2.44a	2.62±0.23a	25.18±1.97a	20.05±1.21a	2.81±0.09a	4 135.50±172.00a
	T2	21.00±0.53a	2.78±0.31a	20.95±1.47b	16.84±0.41b	2.87±0.09a	4 078.50±159.11b

处理 Treatment		穗长/cm Panicle length	穗粗/cm Panicle diameter	单穗质量/g Weight per ear	穗粒质量/g Grain weight per ear	千粒质量/g 1000-grain weight	产量/(kg/hm²) Yield
D30	CK	21.99±0.87a	2.66±0.08a	26.40±1.64ab	20.65±0.80ab	3.03±0.13a	4 844.52±90.88a
	T1	23.09±1.48a	2.70±0.22a	28.49±2.04a	21.57±1.09a	3.03±0.29a	4 923.83±120.80a
	T2	21.13±1.37a	2.77±0.30a	25.18±0.38b	19.39±0.29b	3.12±0.21a	4 497.82±15.04b
D40	CK	22.74±1.50ab	2.72±0.19a	26.47±1.50a	20.70±0.80a	2.92±0.09a	4 696.93±48.48a
	T1	24.00±1.69a	2.73±0.13a	26.13±1.25a	19.78±0.40ab	3.00±0.08a	4 571.51±245.43ab
	T2	20.91±1.08b	2.78±0.11a	25.07±0.87a	19.30±0.77b	2.97±0.16a	4 265.30±160.71b
D50	CK	23.41±0.86a	2.68±0.09a	25.73±1.75a	19.81±1.33a	2.91±0.14a	4 351.50±138.55a
	T1	23.73±2.44a	2.62±0.23a	25.18±1.97a	20.05±1.21a	2.81±0.09a	4 135.50±172.00a
	T2	21.00±0.53a	2.78±0.31a	20.95±1.47b	16.84±0.41b	2.87±0.09a	4 078.50±159.11b

处理 Treatment		穗长 Panicle length	穗粗 Panicle diameter	单穗质量 Weight per ear	穗粒质量 Grain weight per ear	千粒质量 1000-grain weight	倒伏率 Lodging rate	株高 Plant height	抗折力 Breaking resistance	茎秆重心高度 Height of centre gravity
D30	CK	0.265	0.198	0.857^*	0.756^*	0.660	-0.683	0.904^**	-0.222	-0.152
	T1	0.285	0.138	0.301	0.871^**	0.258	-0.784^*	0.719	-0.885^**	-0.769^*
	T2	0.607	0.922^**	0.955^**	0.968^**	0.982^**	-0.420	0.809	0.154	0.440
D40	CK	0.816^*	0.767^*	0.223	0.584	0.863^*	-0.804^*	0.782^*	0.149	-0.656
	T1	0.750	0.371	0.659	0.516	0.236	-0.556	0.685	-0.642	-0.170
	T2	0.466	0.420	0.378	0.414	0.406	-0.373	0.634	-0.130	-0.152
D50	CK	0.576	0.325	0.750	0.742	0.356	-0.344	0.913^**	-0.951^**	0.105
	T1	0.950^**	0.435	0.993^**	0.949^**	0.444	-0.949^**	0.735	-0.699	-0.895^**
	T2	0.505	0.350	0.272	0.473	0.295	-0.734	0.723	0.429	0.126

处理 Treatment		穗长 Panicle length	穗粗 Panicle diameter	单穗质量 Weight per ear	穗粒质量 Grain weight per ear	千粒质量 1000-grain weight	倒伏率 Lodging rate	株高 Plant height	抗折力 Breaking resistance	茎秆重心高度 Height of centre gravity
D30	CK	0.265	0.198	0.857^*	0.756^*	0.660	-0.683	0.904^**	-0.222	-0.152
	T1	0.285	0.138	0.301	0.871^**	0.258	-0.784^*	0.719	-0.885^**	-0.769^*
	T2	0.607	0.922^**	0.955^**	0.968^**	0.982^**	-0.420	0.809	0.154	0.440
D40	CK	0.816^*	0.767^*	0.223	0.584	0.863^*	-0.804^*	0.782^*	0.149	-0.656
	T1	0.750	0.371	0.659	0.516	0.236	-0.556	0.685	-0.642	-0.170
	T2	0.466	0.420	0.378	0.414	0.406	-0.373	0.634	-0.130	-0.152
D50	CK	0.576	0.325	0.750	0.742	0.356	-0.344	0.913^**	-0.951^**	0.105
	T1	0.950^**	0.435	0.993^**	0.949^**	0.444	-0.949^**	0.735	-0.699	-0.895^**
	T2	0.505	0.350	0.272	0.473	0.295	-0.734	0.723	0.429	0.126

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