Effects of Different Dosages of Silicon-Calcium-Potassium-Magnesium Fertilizer on Root Development and Tobacco Quality

doi:10.11924/j.issn.1000-6850.casb20191100817

Abstract

Abstract:

The main objective is to investigate the effect of a new soil conditioner on root development and tobacco quality and explore the fertilizer’s role in improving acidified soil. With ‘NC55’ as the test material, different dosages of silicon calcium potassium magnesium fertilizer gradient (0, 750, 1500, 2250 kg/hm²) treatment were set up in field to determine the agronomic indexes and root morphology and root physiological activity indexes by systematic sampling according to different organs of the plant. Experimental results showed that: the addition of silicon calcium potassium magnesium fertilizer improved the root development and tobacco quality within the range of gradient treatment. It showed that the root was stronger, the agronomic characters were significantly improved, tobacco quality and economic benefits were improved, and the chemical composition was more coordinated. With the increase of the dosage of silicon calcium potassium magnesium fertilizer, all the tested indexes showed a trend of rising first and then decreasing. Among them, the treatment dosage of 1500 kg/hm²was the best. Compared with the treatment without the application of silicon calcium potassium magnesium fertilizer, the morphological index of root increased by 25.06%, the physiological activity of root increased by 28.62%, the potassium content of leaves increased by 0.35 percentage points, the potassium content of leaves decreased by 0.35 percentage points, the output value increased by 3486.88 yuan/hm², the average price increased by 1.23 yuan/kg, and the proportion of topped tobacco increased by 6.9 percentage points. But the dosage should be adjusted according to the soil pH and the specific acidification degree.

Key words: tobacco, silicon calcium potassium magnesium fertilizer, root development, agronomic character, tobacco quality

CLC Number:

S156.2

Ma Cunjin, Ren Shiwei, Zheng Lei, Chen Jianqiu. Effects of Different Dosages of Silicon-Calcium-Potassium-Magnesium Fertilizer on Root Development and Tobacco Quality[J]. Chinese Agricultural Science Bulletin, 2020, 36(31): 7-12.

Figures/Tables 6

References 30

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处理	根长密度/(m/m³)	根表面积/(m²/m³)	根系体积/(cm³/m³)	根尖数/(×10⁴/m³)
T0	2745.00c	2.23c	745.45b	73.34c
T750	2995.04b	2.69b	770.02b	86.55b
T1500	3335.50a	2.98a	826.58a	98.44a
T2250	3235.20a	2.79ab	812.50a	94.55a

处理	根长密度/(m/m³)	根表面积/(m²/m³)	根系体积/(cm³/m³)	根尖数/(×10⁴/m³)
T0	2745.00c	2.23c	745.45b	73.34c
T750	2995.04b	2.69b	770.02b	86.55b
T1500	3335.50a	2.98a	826.58a	98.44a
T2250	3235.20a	2.79ab	812.50a	94.55a

处理	根系TTC还原强度/[μg/(g·h)]	根系TTC还原量/(μg/h)	根系吸收面积/(m²/m³)	根系活跃吸收面积/(m²/m³)
T0	34.50b	765.50b	601.45b	198.80c
T750	38.92ab	808.25b	634.55b	231.50b
T1500	45.45a	949.64a	735.00a	271.34a
T2250	43.88a	927.49a	693.90a	262.55a

处理	根系TTC还原强度/[μg/(g·h)]	根系TTC还原量/(μg/h)	根系吸收面积/(m²/m³)	根系活跃吸收面积/(m²/m³)
T0	34.50b	765.50b	601.45b	198.80c
T750	38.92ab	808.25b	634.55b	231.50b
T1500	45.45a	949.64a	735.00a	271.34a
T2250	43.88a	927.49a	693.90a	262.55a

处理	最大叶长/cm	最大叶宽/cm	最大叶面积/cm²	株高/cm	茎围/cm	节距/cm
T0	61.00b	26.10b	1009.39b	99.20b	8.10b	4.15b
T750	62.90b	26.70b	1064.76b	103.50b	8.40ab	4.20b
T1500	68.00a	29.20a	1258.87a	113.00a	8.70a	4.75a
T2250	67.40a	27.30ab	1166.57a	112.00a	8.50a	4.70a