Nutrient Content of Tobacco Leaves and Root Zone Soil Affected by Citrate Soluble Potassium Fertilizer in Yuxi

doi:10.11924/j.issn.1000-6850.casb2021-0448

Abstract

Abstract:

The paper aims at the problems of potassium content limits and unbalanced content of potassium, calcium and magnesium in Yuxi tobacco leaves. Two field experiment plots were selected to study the nutrient content of tobacco leaves and root zone soil affected by different fertilizer formulas, and five fertilization treatments (T₁ farmers’ conventional fertilization, T₂ potassium-free, T₃ potassium sulfate, T₄ citrate soluble potassium fertilizer substituting 1/4 potassium and T₅ citrate soluble potassium fertilizer substituting 1/2 potassium) were set up. The results showed that T₄ in Tadian area, and T₄ and T₅ in Xinping area had the highest tobacco yield, which increased by 3.43%, 49.7% and 61.1%, respectively. In the two areas, besides increasing the content of potassium and calcium in tobacco leaves, the application of citrate soluble potassium fertilizer (T₄) could increase the content of magnesium, reduce the content of sulfur, and coordinate the content ratio of potassium, calcium and magnesium in tobacco leaves, and the ratio was 1.4 in Tadian and 1.1 in Xinping, respectively. The application of citrate soluble potassium fertilizer significantly increased the content of soil available Ca and Mg of the root zone. In the two study areas, T₄ could increase the soil available Ca by 37.6% and 31.8% respectively, while T₅ could increase the soil available Mg by 112.1% and 46.4% respectively. Based on the effects of different fertilization formulas on tobacco leaves and soil nutrient content, it could be concluded that T₄ treatment has a better effect in Tadian and Xinping, and the quality of tobacco leaves and soil available nutrients in root zone are effectively improved.

Key words: citrate soluble potassium fertilizer, tobacco leaf, root zone nutrients, Yuxi, new potassium fertilizer

CLC Number:

S143.3

LI Dongxue, WANG Yiliu, HUAN Weiwei, BU Lingduo, WANG Ruizhi, LIU Hao, LU Dianjun, WANG Huoyan, CHEN Xiaoqin. Nutrient Content of Tobacco Leaves and Root Zone Soil Affected by Citrate Soluble Potassium Fertilizer in Yuxi[J]. Chinese Agricultural Science Bulletin, 2022, 38(7): 67-73.

Figures/Tables 6

References 26

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试验点	pH	有机质/(g/kg)	无机氮/(mg/kg)	有效磷/(mg/kg)	速效钾/(mg/kg)	土壤类型	质地
塔甸	5.99	43.20	17.44	14.95	632.48	红壤	壤土
新平	5.57	18.50	21.29	2.62	411.09	红壤	壤土

试验点	pH	有机质/(g/kg)	无机氮/(mg/kg)	有效磷/(mg/kg)	速效钾/(mg/kg)	土壤类型	质地
塔甸	5.99	43.20	17.44	14.95	632.48	红壤	壤土
新平	5.57	18.50	21.29	2.62	411.09	红壤	壤土

处理	T₁	T₂	T₃	T₄	T₅
塔甸	2489.7b	2263.8c	2504.9a	2575.5a	2535.0a
新平	1500.2d	1083.5e	1861.2c	2245.5b	2416.8a

处理	T₁	T₂	T₃	T₄	T₅
塔甸	2489.7b	2263.8c	2504.9a	2575.5a	2535.0a
新平	1500.2d	1083.5e	1861.2c	2245.5b	2416.8a

处理	K/%		Ca/%		Mg/%		K/(Ca+Mg)		S/%
处理	塔甸	新平	塔甸	新平	塔甸	新平	塔甸	新平	塔甸	新平
T₁	3.2c	3.0b	2.0b	3.3ab	0.17b	0.42ab	1.5	0.8	0.56a	0.61a
T₂	3.5bc	3.8a	2.2ab	2.6bc	0.17b	0.30b	1.5	1.3	0.39bc	0.55ab
T₃	4.3a	3.9a	2.6a	2.3c	0.23a	0.30b	1.5	1.5	0.40bc	0.58a
T₄	3.8ab	3.9a	2.5a	3.2ab	0.22a	0.38ab	1.4	1.1	0.36c	0.43bc
T₅	3.9ab	3.7ab	2.4a	3.2a	0.21ab	0.45a	1.5	1.0	0.54ab	0.37c