Effects of Combined Application of Potassium and Silicon Fertilizer on Dry Matter Accumulation and Grain Filling of Oil Flax

doi:10.11924/j.issn.1000-6850.casb2021-0263

Abstract

Abstract:

To explore the regulation effect of potassium (K) and silicon (Si) coupling on yield, two oil flax varieties were used to study the effects of K (0, 52.5 and 105 kg K₂O/hm²) and Si (0 and 90 kg SiO₂/hm²) amount on dry matter accumulation (DMA) and grain filling (GF) characteristics by split plot design. The results showed that there were significant differences in DMA and GF characteristics between the varieties. K application significantly increased the DMA after emergence stage, which was increased by 11.85%-20.49% on average under the two dosage levels than that under no K treatment. K amount increase enhanced the growth promoting effect during the period from branching to green fruit; K increased the average grain filling rate, prolonged the duration of rapid growth period, slow growth period and active grouting period, and increased grain yield by 10.79%-19.52%. Si had no significant main effect on DMA and GF, however, low K supply accompanied by Si increased DMA by 27.96%, and the interaction between K and Si affected GF rate of rapid growth period. Under the same soil fertility condition as the test area, K fertilizer dosage of 52.5 kg K₂O/hm² has a significant growth-promoting and yield-increasing effect, and low K supply combined with Si fertilizer has a certain growth-promoting effect.

Key words: oil flax, potassium fertilizer, silicon fertilizer, dry matter accumulation, grain filling

CLC Number:

S565.9

Gou Zhenyu, Guo Lizhuo, Gao Yuhong, Xia Zhangxiang, Wang Yueping, Liu Yahui. Effects of Combined Application of Potassium and Silicon Fertilizer on Dry Matter Accumulation and Grain Filling of Oil Flax[J]. Chinese Agricultural Science Bulletin, 2021, 37(20): 17-25.

Figures/Tables 9

References 40

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处理	出苗期	分茎期	现蕾期	开花期	青果期	成熟期
V	0.82	0.59	0.35	19.22^**	2.99	37.33^**
K	0.44	4.55^*	10.70^**	3.75^*	15.29^**	4.43^*
Si	0.45	0.54	0.00	0.02	3.67	0.05
V*K	0.20	3.49^*	0.46	0.43	1.07	8.81^**
V*Si	1.27	0.67	0.03	0.45	0.41	7.01^*
K*Si	0.65	3.12	0.37	1.50	1.41	7.37^*
VKSi	0.56	0.85	0.43	1.33	6.54^*	1.47

处理	出苗期	分茎期	现蕾期	开花期	青果期	成熟期
V	0.82	0.59	0.35	19.22^**	2.99	37.33^**
K	0.44	4.55^*	10.70^**	3.75^*	15.29^**	4.43^*
Si	0.45	0.54	0.00	0.02	3.67	0.05
V*K	0.20	3.49^*	0.46	0.43	1.07	8.81^**
V*Si	1.27	0.67	0.03	0.45	0.41	7.01^*
K*Si	0.65	3.12	0.37	1.50	1.41	7.37^*
VKSi	0.56	0.85	0.43	1.33	6.54^*	1.47

品种	施肥	出苗期	分茎期	现蕾期	开花期	青果期	成熟期
V₁	K₀Si₀	0.07±0.01a	1.07±0.20d	6.03±0.35c	12.70±3.02bcd	13.77±0.97f	16.90±0.68bc
	K₀Si₁	0.08±0.00a	1.32±0.12bcd	6.44±0.25bc	13.31±2.54bcd	16.50±0.15def	18.49±1.45b
	K₁Si₀	0.08±0.01a	1.40±0.13abcd	6.65±0.09bc	15.21±3.90abc	18.99±0.96cde	17.08±2.20bc
	K₁Si₁	0.08±0.02a	1.61±0.11ab	6.12±0.31c	18.38±3.18a	20.01±1.09bc	17.93±2.90b
	K₂Si₀	0.08±0.01a	1.79±0.29a	7.43±0.31abc	16.83±2.87ab	23.73±1.61a	23.29±2.41a
	K₂Si₁	0.08±0.01a	1.68±0.26ab	7.14±0.54abc	13.25±1.66bcd	19.10±0.66cd	17.08±1.73bc
V₂	K₀Si₀	0.08±0.01a	1.15±0.28cd	6.49±0.79bc	9.73±0.55d	16.72±1.21def	11.76±1.97e
	K₀Si₁	0.08±0.03a	1.54±0.40abc	5.76±1.15c	10.33±1.02d	16.25±0.48def	15.40±2.48bcd
	K₁Si₀	0.09±0.01a	1.39±0.24abcd	8.17±2.22ab	10.10±1.29d	16.84±1.14de	17.73±1.04b
	K₁Si₁	0.09±0.02a	1.48±0.25abcd	7.59±1.03abc	10.97±0.83cd	16.02±0.31ef	22.70±1.98a
	K₂Si₀	0.09±0.01a	1.63±0.11ab	8.70±1.09a	10.76±2.37cd	19.25±0.28cd	13.78±1.04cde
	K₂Si₁	0.07±0.01a	1.13±0.25cd	8.81±1.30a	11.59±2.8cd	22.09±4.62ab	13.15±1.12de
因素及互作
V		0.66	1.36	8.49^**	29.84^**	2.38	18.93^**
K		1.31	4.57^*	10.63^**	2.59	32.44^**	9.11^**
Si		0.03	0.46	0.67	0.27	0.04	1.26
V*K		0.36	3.45^*	2.66	1.50	5.72^**	20.31^**
V*Si		1.36	0.66	0.16	0.19	0.57	9.86^**
K*Si		0.86	5.6^**	0.20	1.51	1.21	10.98^**
VKSi		0.46	1.00	0.49	1.52	9.9^**	0.67

品种	施肥	出苗期	分茎期	现蕾期	开花期	青果期	成熟期
V₁	K₀Si₀	0.07±0.01a	1.07±0.20d	6.03±0.35c	12.70±3.02bcd	13.77±0.97f	16.90±0.68bc
	K₀Si₁	0.08±0.00a	1.32±0.12bcd	6.44±0.25bc	13.31±2.54bcd	16.50±0.15def	18.49±1.45b
	K₁Si₀	0.08±0.01a	1.40±0.13abcd	6.65±0.09bc	15.21±3.90abc	18.99±0.96cde	17.08±2.20bc
	K₁Si₁	0.08±0.02a	1.61±0.11ab	6.12±0.31c	18.38±3.18a	20.01±1.09bc	17.93±2.90b
	K₂Si₀	0.08±0.01a	1.79±0.29a	7.43±0.31abc	16.83±2.87ab	23.73±1.61a	23.29±2.41a
	K₂Si₁	0.08±0.01a	1.68±0.26ab	7.14±0.54abc	13.25±1.66bcd	19.10±0.66cd	17.08±1.73bc
V₂	K₀Si₀	0.08±0.01a	1.15±0.28cd	6.49±0.79bc	9.73±0.55d	16.72±1.21def	11.76±1.97e
	K₀Si₁	0.08±0.03a	1.54±0.40abc	5.76±1.15c	10.33±1.02d	16.25±0.48def	15.40±2.48bcd
	K₁Si₀	0.09±0.01a	1.39±0.24abcd	8.17±2.22ab	10.10±1.29d	16.84±1.14de	17.73±1.04b
	K₁Si₁	0.09±0.02a	1.48±0.25abcd	7.59±1.03abc	10.97±0.83cd	16.02±0.31ef	22.70±1.98a
	K₂Si₀	0.09±0.01a	1.63±0.11ab	8.70±1.09a	10.76±2.37cd	19.25±0.28cd	13.78±1.04cde
	K₂Si₁	0.07±0.01a	1.13±0.25cd	8.81±1.30a	11.59±2.8cd	22.09±4.62ab	13.15±1.12de
因素及互作
V		0.66	1.36	8.49^**	29.84^**	2.38	18.93^**
K		1.31	4.57^*	10.63^**	2.59	32.44^**	9.11^**
Si		0.03	0.46	0.67	0.27	0.04	1.26
V*K		0.36	3.45^*	2.66	1.50	5.72^**	20.31^**
V*Si		1.36	0.66	0.16	0.19	0.57	9.86^**
K*Si		0.86	5.6^**	0.20	1.51	1.21	10.98^**
VKSi		0.46	1.00	0.49	1.52	9.9^**	0.67

处理	T₁	T₂	T₃	T₄	T₅	T₆	T₇
V	0.9	0.94	0.28	12^**	0.41	4.06	14.01^**
K	5.54^*	2.84	27.98^**	17.16^**	0.71	0.66	1.95
Si	0.03	4.55^*	25.89^**	10.66^**	0.07	4.16	0.07
V*K	8.07^**	1.48	17.36^**	17.9^**	4.32^*	0.16	2.14
V*Si	5.65^*	0.05	6.62^*	0.95	7.09^*	3.87	0.04
K*Si	0.07	1.66	25.58^**	10.42^**	1.97	0.8	12.13^**
VKSi	2.4	0.24	20.15^**	17.74^**	1.84	2.42	8.22^**