Improvement of flue-cured tobacco LY1306 quality through different structural optimization methods

doi:10.16178/j.issn.0528-9017.20230424

Abstract

Abstract:

By adjusting the topping height and the number of leaves retained in flue-cured tobacco LY1306, the structure of the tobacco plant was optimized to improve the yield and quality of the cured leaves after roasting, providing a technical basis for the production of high-quality flue-cured tobacco LY1306 in Luoyang. This experiment used a two-factor randomized block design, with the two factors being the topping height and the number of leaves retained. The topping heights were 1.40, 1.55 and 1.70 m, and the number of leaves retained were 14, 16, 18 and 20. The results showed that when the topping height was greater than 1.55 m and the number of leaves retained was more than 16, the traits were superior to conventional treatment. The physical properties of the upper leaves were more excellent when the topping height was 1.40 m with 16 leaves retained, and the middle leaves were best treated with a topping height of 1.55 m and 16 leaves retained. The treatment with a topping height of 1.70 m and 20 leaves retained had poorer data for all items. The treatment with a topping height of 1.70 m and 20 leaves retained had longer and wider leaves and a lower stem rate, with the best data. The treatment with a topping height of 1.40 m and 14 leaves retained had smaller leaves and slightly worse traits. The appearance quality scores of different treatments were all better than the control, and the treatment with a topping height of 1.55 m and 18 leaves retained had the highest comprehensive score for all parts. The economic traits of the tobacco plant treated with a topping height of 1.55 m and 18 leaves retained were the best, with a yield of 128.96 kg per 667 m², a value of 3 410.99 yuan, and the highest proportion of top-grade tobacco. In summary, when the topping height of flue-cured tobacco LY1306 was 1.55 meters and the number of leaves retained was 18, the cured leaves had better physical properties, suitable chemical component content, good coordination, improved appearance quality, increased leaf grade, and a higher proportion of top-grade leaves, which could meet the needs of the cigarette industry.

Key words: flue-cured tobacco, LY1306, topping height, number of leaves retained, yield and quality

CLC Number:

S572

LI Lihua, YUE Xiuqiang, SONG Zhengxiong, KONG Dehui, DONG Kunle, XUE Gang. Improvement of flue-cured tobacco LY1306 quality through different structural optimization methods[J]. Journal of Zhejiang Agricultural Sciences, 2024, 65(10): 2461-2469.

Figures/Tables 9

References 26

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处理	茎围/ cm	节距/ cm	最大叶长/ cm	最大叶宽/ cm	最大叶面积/ cm²
CK	12.00 ab	6.70 a	70.50 c	31.58 cd	1 412.79 bc
T1	10.20 c	6.30 b	60.70 e	29.42 d	1 132.96 d
T2	11.80 b	5.80 d	66.58 d	32.67 c	1 380.07 c
T3	12.67 a	5.47 e	74.00 a	35.58 ab	1 670.74 ab
T4	12.33 a	6.00 c	72.75 abc	37.13 a	1 714.07 a
T5	12.03 ab	6.00 c	73.27 ab	34.10 bc	1 585.23 b
T6	12.53 a	5.50 e	73.83 ab	36.43 ab	1 706.80 a

处理	茎围/ cm	节距/ cm	最大叶长/ cm	最大叶宽/ cm	最大叶面积/ cm²
CK	12.00 ab	6.70 a	70.50 c	31.58 cd	1 412.79 bc
T1	10.20 c	6.30 b	60.70 e	29.42 d	1 132.96 d
T2	11.80 b	5.80 d	66.58 d	32.67 c	1 380.07 c
T3	12.67 a	5.47 e	74.00 a	35.58 ab	1 670.74 ab
T4	12.33 a	6.00 c	72.75 abc	37.13 a	1 714.07 a
T5	12.03 ab	6.00 c	73.27 ab	34.10 bc	1 585.23 b
T6	12.53 a	5.50 e	73.83 ab	36.43 ab	1 706.80 a

打顶后天数/d	处理	长度/cm	宽度/cm	叶面积/cm²	单片叶鲜重/g	单片叶干重/g	鲜干比
10	CK	64.26 c	34.27 b	1 397.29 b	71.38 c	16.69 a	4.28 e
	T1	65.63 c	30.43 c	1 267.17 c	68.54 c	13.11 c	5.23 cd
	T2	75.28 a	36.70 a	1 752.98 a	97.42 a	14.74 b	6.61 a
	T3	73.22 ab	33.59 b	1 560.53 ab	84.26 b	14.16 bc	5.95 b
	T4	70.40 b	37.26 a	1 664.36 a	90.51 ab	16.96 a	5.34 c
	T5	65.47 c	34.56 b	1 435.65 b	73.25 c	14.84 b	4.94 d
	T6	66.59 c	31.87 c	1 346.55 bc	66.31 c	13.06 c	5.08 cd
20	CK	71.78 b	37.02 b	1 686.05 c	77.97 c	18.67 c	4.18 c
	T1	75.44 a	39.17 ab	1 874.94 b	86.09 b	17.94 d	4.80 ab
	T2	76.44 a	38.39 b	1 861.96 b	88.50 b	17.49 d	5.06 a
	T3	75.56 a	41.67 a	1 997.78 a	98.21 a	20.52 a	4.79 ab
	T4	74.17 a	38.39 b	1 709.23 c	85.44 b	19.87 b	4.30 bc
	T5	70.43 b	35.64 c	1 592.67 d	74.22 cd	16.42 e	4.52 b
	T6	70.26 b	34.90 c	1 555.84 d	71.59 d	16.69 e	4.29 bc
30	CK	62.46 d	33.00 c	1 307.82 e	64.23 e	14.78 c	4.35 c
	T1	81.28 a	40.44 a	2 085.58 a	115.30 a	20.64 a	5.59 a
	T2	81.22 a	39.06 ab	2 012.92 a	110.86 a	20.19 ab	5.49 a
	T3	77.50 b	38.38 b	1 887.29 b	106.79 ab	19.59 b	5.45 a
	T4	76.50 b	40.89 a	1 855.05 b	98.97 bc	19.59 b	5.05 b
	T5	71.08 c	38.24 b	1 724.63 c	90.30 c	18.73 b	4.82 b
	T6	68.72 c	36.28 bc	1 581.91 d	75.14 d	16.34 bc	4.60 bc
40	CK	62.00 d	35.06 c	1 379.23 d	69.33 e	17.06 c	4.06 d
	T1	78.67 a	43.50 a	2 171.35 a	133.69 a	26.77 a	4.99 a
	T2	76.83 ab	37.11 bc	1 809.06 b	97.22 bc	19.62 bc	4.95 a
	T3	74.81 b	38.62 b	1 833.17 b	106.37 b	20.71 b	5.14 a
	T4	74.39 b	36.50 bc	1 722.82 bc	94.39 c	21.23 b	4.45 b
	T5	68.33 c	37.94 b	1 644.90 b	85.33 d	20.52 b	4.16 cd
	T6	64.06 cd	31.28 d	1 271.41 d	63.70 e	14.76 d	4.32 bc

打顶后天数/d	处理	长度/cm	宽度/cm	叶面积/cm²	单片叶鲜重/g	单片叶干重/g	鲜干比
10	CK	64.26 c	34.27 b	1 397.29 b	71.38 c	16.69 a	4.28 e
	T1	65.63 c	30.43 c	1 267.17 c	68.54 c	13.11 c	5.23 cd
	T2	75.28 a	36.70 a	1 752.98 a	97.42 a	14.74 b	6.61 a
	T3	73.22 ab	33.59 b	1 560.53 ab	84.26 b	14.16 bc	5.95 b
	T4	70.40 b	37.26 a	1 664.36 a	90.51 ab	16.96 a	5.34 c
	T5	65.47 c	34.56 b	1 435.65 b	73.25 c	14.84 b	4.94 d
	T6	66.59 c	31.87 c	1 346.55 bc	66.31 c	13.06 c	5.08 cd
20	CK	71.78 b	37.02 b	1 686.05 c	77.97 c	18.67 c	4.18 c
	T1	75.44 a	39.17 ab	1 874.94 b	86.09 b	17.94 d	4.80 ab
	T2	76.44 a	38.39 b	1 861.96 b	88.50 b	17.49 d	5.06 a
	T3	75.56 a	41.67 a	1 997.78 a	98.21 a	20.52 a	4.79 ab
	T4	74.17 a	38.39 b	1 709.23 c	85.44 b	19.87 b	4.30 bc
	T5	70.43 b	35.64 c	1 592.67 d	74.22 cd	16.42 e	4.52 b
	T6	70.26 b	34.90 c	1 555.84 d	71.59 d	16.69 e	4.29 bc
30	CK	62.46 d	33.00 c	1 307.82 e	64.23 e	14.78 c	4.35 c
	T1	81.28 a	40.44 a	2 085.58 a	115.30 a	20.64 a	5.59 a
	T2	81.22 a	39.06 ab	2 012.92 a	110.86 a	20.19 ab	5.49 a
	T3	77.50 b	38.38 b	1 887.29 b	106.79 ab	19.59 b	5.45 a
	T4	76.50 b	40.89 a	1 855.05 b	98.97 bc	19.59 b	5.05 b
	T5	71.08 c	38.24 b	1 724.63 c	90.30 c	18.73 b	4.82 b
	T6	68.72 c	36.28 bc	1 581.91 d	75.14 d	16.34 bc	4.60 bc
40	CK	62.00 d	35.06 c	1 379.23 d	69.33 e	17.06 c	4.06 d
	T1	78.67 a	43.50 a	2 171.35 a	133.69 a	26.77 a	4.99 a
	T2	76.83 ab	37.11 bc	1 809.06 b	97.22 bc	19.62 bc	4.95 a
	T3	74.81 b	38.62 b	1 833.17 b	106.37 b	20.71 b	5.14 a
	T4	74.39 b	36.50 bc	1 722.82 bc	94.39 c	21.23 b	4.45 b
	T5	68.33 c	37.94 b	1 644.90 b	85.33 d	20.52 b	4.16 cd
	T6	64.06 cd	31.28 d	1 271.41 d	63.70 e	14.76 d	4.32 bc

打顶后天数/d	处理	长度/cm	宽度/cm	叶面积/cm²	单片叶鲜重/g	单片叶干重/g	鲜干比
10	CK	65.39 cd	30.51 b	1 265.86 c	70.73 c	12.71 ab	5.57 d
	T1	64.28 d	31.13 ab	1 269.66 c	72.93 bc	11.47 bc	6.36 c
	T2	73.44 b	34.72 a	1 617.87 a	96.03 a	14.08 a	6.82 b
	T3	76.20 a	33.62 a	1 625.49 a	90.86 a	11.87 bc	7.65 a
	T4	72.92 b	35.50 a	1 642.50 a	94.37 a	14.02 a	6.73 b
	T5	68.50 c	32.76 ab	1 423.86 b	78.54 b	12.00 b	6.54 bc
	T6	67.92 c	31.39 ab	1 352.76 bc	69.98 c	10.32 c	6.78 b
20	CK	71.14 b	32.60 d	1 471.51 c	67.67 d	11.89 d	5.69 bc
	T1	74.00 ab	35.94 cd	1 687.49 b	74.75 c	13.40 bc	5.58 c
	T2	76.44 a	38.33 ab	1 859.05 a	87.32 b	14.22 ab	6.14 ab
	T3	77.00 a	40.94 a	2 000.19 a	98.71 a	15.46 a	6.39 a
	T4	74.50 ab	36.40 bc	1 674.45 b	77.40 c	13.59 bc	5.70 bc
	T5	70.77 b	32.81 d	1 473.29 c	71.51 cd	12.08 d	5.92 b
	T6	73.22 ab	33.08 cd	1 536.83 c	73.33 c	12.98 c	5.65 c
30	CK	65.83 c	30.36 c	1 268.11 c	66.93 c	11.04 c	6.06 d
	T1	77.89 a	37.11 ab	1 834.02 a	99.97 ab	13.59 b	7.36 b
	T2	81.78 a	35.67 b	1 850.90 a	106.21 a	15.91 a	6.68 c
	T3	77.53 a	39.23 a	1 929.83 a	110.31 a	13.18 b	8.37 a
	T4	76.11 a	36.56 b	1 672.76 b	94.86 b	13.12 b	7.23 b
	T5	70.58 b	35.80 b	1 603.23 b	88.17 b	13.19 b	6.69 c
	T6	67.72 bc	29.61 c	1 272.29 c	67.41 a	10.54 c	6.40 cd
40	CK	66.94 c	32.67 c	1 387.61 c	66.74 cd	12.69 c	5.26 d
	T1	80.50 a	42.39 a	2 165.16 a	133.73 a	19.00 a	7.04 b
	T2	74.83 b	37.06 b	1 759.60 b	100.24 b	15.01 b	6.68 b
	T3	73.96 b	37.54 b	1 761.66 b	98.14 b	12.75 c	7.70 a
	T4	75.06 b	37.37 b	1 779.77 b	97.65 b	15.17 b	6.44 bc
	T5	66.06 c	33.94 c	1 422.60 c	70.55 c	11.43 c	6.17 c
	T6	62.33 d	31.17 c	1 232.72 c	58.09 d	9.71 d	5.98 c