Potassium Conversion Characteristics of Mineral Potassium Fertilizer in Chinese Typical Tobacco-planting Soil and Preliminary Evaluation of Increasing Potassium Content in Tobacco Leaves

doi:10.11924/j.issn.1000-6850.casb2023-0724

Abstract

Abstract:

This study aimed to investigate the impact of different forms of potassium fertilizers on enhancing the soil quality and productivity of tobacco fields. Through a combination of indoor incubation experiments and field trials, the bioavailability of soil potassium after the application of various potassium fertilizers was assessed. The indoor incubation experiments analyzed the changes in the content of non-exchangeable potassium (NEK), exchangeable potassium (EK), and water-soluble potassium (WSK) in the soil after treatment with three types of potassium fertilizers. The results showed that these three forms of potassium constituted 17.7% to 83.9%, 11.1% to 56.0%, and 2.3% to 36.3% respectively. Applying Silicon-based potassium fertilizer (Si-K) raised the content of EK and NEK in the southwest, Huang-huai and northeast by 26.3% and 18.1%, 30.8% and 24.5%, and 36.3% and 42.7%, respectively. Grey correlation analysis revealed that the total K, texture, and mineral composition of soil were the primary variables influencing the amount of K extracted by NaBPh₄. Field experiment indicated that, compared with 0K, the partial substitution of K₂SO₄ by Si-K could increase tobacco leaf yield (8.7%), and K content (66.6%) while lowering residual K in the soil. In conclusion, Si-K could aid soil K maintenance. Partial substitution of K₂SO₄ by Si-K could increase tobacco quality and quantity. Partial substitution with Si-K merits further study.

Key words: soil potassium, EK, NEK, silicon-based potassium fertilizer, NaBPh₄, bioavailability, tobacco yield, soil quality, tobacco

LI Dongxue, LIU Xinyuan, SONG Zhengxiong, LI Haohao, ZHAO Shimin, WANG Yiliu, HUAN Weiwei, WANG Huoyan, LU Dianjun, CHEN Xiaoqin, WANG Yujie. Potassium Conversion Characteristics of Mineral Potassium Fertilizer in Chinese Typical Tobacco-planting Soil and Preliminary Evaluation of Increasing Potassium Content in Tobacco Leaves[J]. Chinese Agricultural Science Bulletin, 2024, 40(21): 84-90.

Figures/Tables 5

References 26

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地点	东经	北纬	质地	pH	粘粒/ %	粉粒/ %	砂粒/ %	有机质/ (g/kg)	全钾/ (g/kg)	水溶性钾/ (mg/kg)	速效钾/ (mg/kg)	缓效钾/ (mg/kg)	阳离子交换量/ (cmol/kg)
西南1	101°57′3″	23°59′8″	粉砂壤土	6.23	7.7	77.8	14.6	13.9	6.3	56	310	461	12.4
西南2	101°55′48″	23°58′44″	粉砂壤土	5.8	5.6	77.7	16.7	17.7	6.5	91	332	537	11.2
西南3	101°49′20″	26°11′52″	粉砂壤土	8.44	6.7	79.0	14.2	6.9	10.7	19	78	552	11.3
黄淮1	111°49′18″	34°32′47″	粉砂壤土	8.66	10.9	84.2	4.9	9.9	10.8	21	237	676	21.3
黄淮2	120°34′44″	36°26′56″	粉砂壤土	6.37	5.4	53.8	40.9	4.4	2.7	12	98	212	11.5
黄淮3	120°40′52″	37°25′22″	壤土	5.13	3.8	47.8	48.4	12.8	4.9	18	167	704	16.0
东北1	126°47′11″	47°16′0″	粉砂壤土	6.31	7.1	86.9	6.0	22.4	8.9	5	221	436	35.5
东北2	125°49′42″	45°42′23″	粉砂壤土	7.94	7.2	77.5	15.3	26.7	3.1	9	143	350	26.6
东北3	125°59′10″	46°1′32″	粉砂壤土	9.05	7.5	77.2	15.3	31.5	6.0	10	198	371	21.0

地点	东经	北纬	质地	pH	粘粒/ %	粉粒/ %	砂粒/ %	有机质/ (g/kg)	全钾/ (g/kg)	水溶性钾/ (mg/kg)	速效钾/ (mg/kg)	缓效钾/ (mg/kg)	阳离子交换量/ (cmol/kg)
西南1	101°57′3″	23°59′8″	粉砂壤土	6.23	7.7	77.8	14.6	13.9	6.3	56	310	461	12.4
西南2	101°55′48″	23°58′44″	粉砂壤土	5.8	5.6	77.7	16.7	17.7	6.5	91	332	537	11.2
西南3	101°49′20″	26°11′52″	粉砂壤土	8.44	6.7	79.0	14.2	6.9	10.7	19	78	552	11.3
黄淮1	111°49′18″	34°32′47″	粉砂壤土	8.66	10.9	84.2	4.9	9.9	10.8	21	237	676	21.3
黄淮2	120°34′44″	36°26′56″	粉砂壤土	6.37	5.4	53.8	40.9	4.4	2.7	12	98	212	11.5
黄淮3	120°40′52″	37°25′22″	壤土	5.13	3.8	47.8	48.4	12.8	4.9	18	167	704	16.0
东北1	126°47′11″	47°16′0″	粉砂壤土	6.31	7.1	86.9	6.0	22.4	8.9	5	221	436	35.5
东北2	125°49′42″	45°42′23″	粉砂壤土	7.94	7.2	77.5	15.3	26.7	3.1	9	143	350	26.6
东北3	125°59′10″	46°1′32″	粉砂壤土	9.05	7.5	77.2	15.3	31.5	6.0	10	198	371	21.0

土壤性质	原始土壤		KCl		杂卤石		硅基钾肥
土壤性质	关联度	关联序	关联度	关联序	关联度	关联序	关联度	关联序
pH	0.70	5	0.72	2	0.71	5	0.72	5
SOM	0.58	12	0.58	13	0.56	14	0.57	14
全钾	0.75	1	0.72	3	0.71	6	0.70	6
WSK	0.54	17	0.49	19	0.50	19	0.49	19
NH₄OAc-K	0.72	4	0.68	5	0.71	3	0.66	9
HNO₃-K	0.72	3	0.71	4	0.70	7	0.74	3
有效钙	0.62	11	0.59	12	0.61	12	0.61	13
有效镁	0.53	19	0.53	16	0.53	17	0.56	15
砂粒	0.57	13	0.54	15	0.54	16	0.53	17
粉粒	0.64	10	0.65	8	0.74	2	0.77	1
粘粒	0.75	2	0.74	1	0.77	1	0.77	2
蒙脱石	0.57	14	0.62	11	0.70	8	0.73	4
蛭石	0.55	16	0.51	18	0.55	15	0.54	16
水云母	0.56	15	0.53	17	0.53	18	0.51	18
闪石	0.68	7	0.64	9	0.65	10	0.61	12
高岭石	0.67	8	0.63	10	0.63	11	0.61	11
绿泥石	0.67	9	0.65	7	0.67	9	0.68	8
石英	0.69	6	0.65	6	0.71	4	0.68	7
长石	0.53	18	0.56	14	0.57	13	0.63	10

土壤性质	原始土壤		KCl		杂卤石		硅基钾肥
土壤性质	关联度	关联序	关联度	关联序	关联度	关联序	关联度	关联序
pH	0.70	5	0.72	2	0.71	5	0.72	5
SOM	0.58	12	0.58	13	0.56	14	0.57	14
全钾	0.75	1	0.72	3	0.71	6	0.70	6
WSK	0.54	17	0.49	19	0.50	19	0.49	19
NH₄OAc-K	0.72	4	0.68	5	0.71	3	0.66	9
HNO₃-K	0.72	3	0.71	4	0.70	7	0.74	3
有效钙	0.62	11	0.59	12	0.61	12	0.61	13
有效镁	0.53	19	0.53	16	0.53	17	0.56	15
砂粒	0.57	13	0.54	15	0.54	16	0.53	17
粉粒	0.64	10	0.65	8	0.74	2	0.77	1
粘粒	0.75	2	0.74	1	0.77	1	0.77	2
蒙脱石	0.57	14	0.62	11	0.70	8	0.73	4
蛭石	0.55	16	0.51	18	0.55	15	0.54	16
水云母	0.56	15	0.53	17	0.53	18	0.51	18
闪石	0.68	7	0.64	9	0.65	10	0.61	12
高岭石	0.67	8	0.63	10	0.63	11	0.61	11
绿泥石	0.67	9	0.65	7	0.67	9	0.68	8
石英	0.69	6	0.65	6	0.71	4	0.68	7
长石	0.53	18	0.56	14	0.57	13	0.63	10

处理	产量/(t/hm²)	烟叶钾含量/%	土壤速效钾/(mg/kg)
CK	2.92 b	0.55 c	178 b
K₂SO₄	2.91 b	0.95 a	380 a
2/5硅基钾肥	3.18 a	0.92 a	211 b
硅基钾肥	2.88 b	0.76 b	183 b