Effect of supplemental UV-B radiation during dark period on eggplant seedling production in protected cultivation

doi:10.16178/j.issn.0528-9017.20250321

Abstract

Abstract:

Using seedlings of three eggplant varieties as experimental materials，a quadratic saturated D-optimal design was employed to investigate the regulatory effects of supplemental UV-B radiation during the dark period on eggplant seedling growth in protected cultivation. Mathematical models between seedling growth indicators and the seedling vigor index and UV-B radiation dose （including intensity and duration） were established，and the biological effects of UV-B radiation were systematically analyzed. The results showed that UV-B radiation significantly affected the growth indicators of eggplant seedlings，and the sensitivity to UV-B radiation varied among varieties. Model analysis revealed that with increasing UV-B radiation intensity or duration，plant height，shoot dry weight per plant，and root dry weight per plant of eggplant seedlings exhibited varying trends，while the seedling vigor index first increased and then decreased in all cases. There was a significant interaction between UV-B radiation intensity and treatment duration，and this interaction effect showed specificity among different varieties. Through simulation，the optimal UV-B radiation intensity and duration for cultivating vigorous seedlings of common eggplant in this experiment were 16.9-17.8 μW·cm^-2 and 4.2 h·d^-1，respectively；and for rootstock eggplant vigorous seedlings，the optimal values were 22.0-25.0 μW·cm^-2 and 1.6-3.3 h·d^-1，respectively.

Key words: UV-B radiation, eggplant, dark-period supplemental lighting, seedling vigor index

CLC Number:

S641.1

GUO Ziqing, ZHOU Qin, YANG Aiyi, SHAO Lei, ZHENG Tao, WANG Tao, XU Cheng, XU Henghui, ZHU Pu. Effect of supplemental UV-B radiation during dark period on eggplant seedling production in protected cultivation[J]. Journal of Zhejiang Agricultural Sciences, 2026, 67(10): 2427-2433.

Figures/Tables 5

References 23

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处理	辐射强度			辐射时间
处理	编码	强度/（μW·cm^-2）	距离/m	编码	时间长度/（h·d^-1）
1	-1	5.0	1.00	-1	1.0
2	1	25.0	0.30	-1	1.0
3	-1	5.0	1.00	1	6.0
4	-0.131 5	13.7	0.50	-0.131 5	3.2
5	1	25.0	0.30	0.394 5	4.5
6	0.394 5	18.9	0.38	1	6.0

处理	辐射强度			辐射时间
处理	编码	强度/（μW·cm^-2）	距离/m	编码	时间长度/（h·d^-1）
1	-1	5.0	1.00	-1	1.0
2	1	25.0	0.30	-1	1.0
3	-1	5.0	1.00	1	6.0
4	-0.131 5	13.7	0.50	-0.131 5	3.2
5	1	25.0	0.30	0.394 5	4.5
6	0.394 5	18.9	0.38	1	6.0

品种	处理	株高/ cm	茎粗/ mm	单株地下部干重/mg	单株地上部干重/mg	全株干重/mg	壮苗指数
茄砧2号	1	14.35±0.69 a	2.33±0.05 a	86.62±3.31 d	830.40±86.35 bc	917.02±87.08 b	110.66±4.19 c
	2	12.43±0.46 c	2.32±0.09 a	107.26±7.23 a	779.28±91.04 c	886.54±91.53 b	138.83±8.98 a
	3	13.45±0.45 b	2.40±0.13 a	82.08±4.16 d	861.66±52.33 b	943.74±53.15 b	106.76±5.21 c
	4	12.46±0.66 c	2.40±0.13 a	94.68±3.16 bc	871.66±51.28 b	966.34±48.58 b	123.73±3.82 b
	5	11.39±0.96 d	2.34±0.21 a	99.76±4.21 b	1 034.44±34.49 a	1 134.20±35.20 a	132.72±4.49 a
	6	11.51±0.43 d	2.23±0.09 a	92.38±3.83 c	828.78±14.82 bc	921.16±12.68 b	120.54±4.95 b
	CK	10.99±0.80 d	2.22±0.15 a	70.88±3.72 e	524.02±27.48 d	594.90±29.48 c	92.62±4.44 d
先锋	1	9.84±0.19 bc	2.33±0.03 d	18.48±1.33 f	192.82±11.08 d	211.30±12.33 c	25.26±1.86 e
	2	11.37±0.70 a	2.63±0.11 b	27.37±1.62 e	243.96±18.79 bc	271.32±20.40 b	36.71±1.90 d
	3	10.62±0.22 ab	2.51±0.01 bc	30.69±0.77 d	224.90±26.74 cd	255.59±27.23 b	40.96±1.04 c
	4	9.34±0.30 c	2.57±0.10 b	35.48±1.11 bc	285.81±9.27 ab	321.29±10.32 a	48.72±1.68 a
	5	11.32±0.15 a	2.82±0.15 a	37.56±1.00 ab	270.87±30.56 ab	308.42±31.56 a	50.54±1.77 a
	6	10.33±0.38 b	2.39±0.05 cd	38.38±1.02 a	305.80±12.75 a	344.18±11.97 a	51.18±1.59 a
	CK	11.36±0.68 a	2.58±0.09 b	33.26±1.87 c	299.32±37.39 a	332.58±38.78 a	44.51±2.29 b
紫仙	1	21.11±1.20 abc	3.28±0.17 bc	62.83±1.74 e	461.25±37.80 c	524.07±37.65 c	79.59±2.44 f
	2	20.04±0.72 c	2.85±0.14 d	80.48±1.94 c	398.12±20.33 d	478.60±20.65 d	103.58±2.83 d
	3	21.70±0.83 a	3.63±0.31 a	76.14±2.13 d	493.46±23.66 bc	569.60±24.40 b	97.47±2.39 e
	4	21.28±0.53 ab	3.37±0.22 abc	92.70±5.50 a	504.42±13.85 b	597.12±16.80 b	119.23±6.94 a
	5	20.32±0.97 bc	3.35±0.30 abc	83.12±4.50 c	500.82±31.27 b	583.94±34.15 b	106.59±6.10 cd
	6	22.14±0.32 a	3.49±0.11 ab	87.52±3.22 b	561.26±31.40 a	648.78±30.63 a	111.46±4.19 bc
	CK	22.00±0.76 a	3.13±0.05 c	90.93±2.29 ab	544.87±27.12 a	635.80±28.79 a	115.18±2.87 ab

品种	处理	株高/ cm	茎粗/ mm	单株地下部干重/mg	单株地上部干重/mg	全株干重/mg	壮苗指数
茄砧2号	1	14.35±0.69 a	2.33±0.05 a	86.62±3.31 d	830.40±86.35 bc	917.02±87.08 b	110.66±4.19 c
	2	12.43±0.46 c	2.32±0.09 a	107.26±7.23 a	779.28±91.04 c	886.54±91.53 b	138.83±8.98 a
	3	13.45±0.45 b	2.40±0.13 a	82.08±4.16 d	861.66±52.33 b	943.74±53.15 b	106.76±5.21 c
	4	12.46±0.66 c	2.40±0.13 a	94.68±3.16 bc	871.66±51.28 b	966.34±48.58 b	123.73±3.82 b
	5	11.39±0.96 d	2.34±0.21 a	99.76±4.21 b	1 034.44±34.49 a	1 134.20±35.20 a	132.72±4.49 a
	6	11.51±0.43 d	2.23±0.09 a	92.38±3.83 c	828.78±14.82 bc	921.16±12.68 b	120.54±4.95 b
	CK	10.99±0.80 d	2.22±0.15 a	70.88±3.72 e	524.02±27.48 d	594.90±29.48 c	92.62±4.44 d
先锋	1	9.84±0.19 bc	2.33±0.03 d	18.48±1.33 f	192.82±11.08 d	211.30±12.33 c	25.26±1.86 e
	2	11.37±0.70 a	2.63±0.11 b	27.37±1.62 e	243.96±18.79 bc	271.32±20.40 b	36.71±1.90 d
	3	10.62±0.22 ab	2.51±0.01 bc	30.69±0.77 d	224.90±26.74 cd	255.59±27.23 b	40.96±1.04 c
	4	9.34±0.30 c	2.57±0.10 b	35.48±1.11 bc	285.81±9.27 ab	321.29±10.32 a	48.72±1.68 a
	5	11.32±0.15 a	2.82±0.15 a	37.56±1.00 ab	270.87±30.56 ab	308.42±31.56 a	50.54±1.77 a
	6	10.33±0.38 b	2.39±0.05 cd	38.38±1.02 a	305.80±12.75 a	344.18±11.97 a	51.18±1.59 a
	CK	11.36±0.68 a	2.58±0.09 b	33.26±1.87 c	299.32±37.39 a	332.58±38.78 a	44.51±2.29 b
紫仙	1	21.11±1.20 abc	3.28±0.17 bc	62.83±1.74 e	461.25±37.80 c	524.07±37.65 c	79.59±2.44 f
	2	20.04±0.72 c	2.85±0.14 d	80.48±1.94 c	398.12±20.33 d	478.60±20.65 d	103.58±2.83 d
	3	21.70±0.83 a	3.63±0.31 a	76.14±2.13 d	493.46±23.66 bc	569.60±24.40 b	97.47±2.39 e
	4	21.28±0.53 ab	3.37±0.22 abc	92.70±5.50 a	504.42±13.85 b	597.12±16.80 b	119.23±6.94 a
	5	20.32±0.97 bc	3.35±0.30 abc	83.12±4.50 c	500.82±31.27 b	583.94±34.15 b	106.59±6.10 cd
	6	22.14±0.32 a	3.49±0.11 ab	87.52±3.22 b	561.26±31.40 a	648.78±30.63 a	111.46±4.19 bc
	CK	22.00±0.76 a	3.13±0.05 c	90.93±2.29 ab	544.87±27.12 a	635.80±28.79 a	115.18±2.87 ab

生长指标		茄砧2号
生长指标	模型		F值
株高	y₁=12.24-1.05X₁-0.54X₂+0.42X₁²+0.19X₂²-0.09X₁X₂		3.21
茎粗	y₂=2.39-0.05X₁-0.01X₂+0.04X₁²-0.12X₂²-0.05X₁X₂		0.27
单株地下部干重	y₃=95.32+8.43X₁-4.16X₂-1.41X₁²-1.13X₂²-1.89X₁X₂		3.99^**
单株地上部干重	y₄=880.34+13.64X₁+54.63X₂+126.22X₁²-146.89X₂²+39.20X₁X₂		0.28
全株干重	y₅=975.66+22.07X₁+50.67X₂+124.80X₁²-148.02X₂²+37.31X₁X₂		2.09
壮苗指数	y₆=124.83+11.77X₁-4.27X₂-0.71 X₁²-3.64 X₂²-2.32 X₁X₂		4.96^**
生长指标		先锋
生长指标	模型		F值
株高	y₁=9.44+0.63X₁+0.26X₂+1.17X₁²+0.26X₂²-0.13X₁X₂		4.67^**
茎粗	y₂=2.45+0.10X₁+0.04X₂+0.31X₁²-0.24X₂²-0.05X₁X₂		2.78^*
单株地下部干重	y₃=33.54+3.32X₁+4.98X₂+0.05X₁²-5.69X₂²-1.12X₁X₂		4.87^**
单株地上部干重	y₄=240.96+23.65X₁+14.13X₂+3.26X₁²-11.7X₂²-1.91X₁X₂		2.65^*
全株干重	y₅=274.5+26.98X₁+19.11X₂+3.31X₁²-17.39X₂²-3.04X₁X₂		3.79^*
壮苗指数	y₆=50.48+4.73X₁+6.85X₂-5.94X₁²-6.71X₂²-1.00X₁X₂		36.88^**
生长指标		紫仙
生长指标	模型		F值
株高	y₁=21.31-0.31X₁+0.44X₂-0.92X₁²+0.64X₂²+0.15X₁X₂		2.97^*
茎粗	y₂=3.38-0.15X₁+0.24X₂+0.02X₁²-0.09X₂²+0.06X₁X₂		3.43^*
单株地下部干重	y₃=94.00+4.43X₁+2.58X₂-13.43X₁²-6.66X₂²-4.40X₁X₂		8.91^**
单株地上部干重	y₄=510.15-2.47X₁+45.20X₂-36.33X₁²+1.07X₂²+29.69X₁X₂		3.84^*
全株干重	y₅=604.15+1.96X₁+47.46X₂-49.76X₁²-5.60X₂²+24.69 X₁X₂		4.36^**
壮苗指数	y₆=120.92+5.78X₁+2.72X₂-17.29X₁²-9.32X₂²-6.21X₁X₂		9.07^**