Effect of prohexadione-calcium on the growth and quality of cauliflower seedlings

doi:10.16178/j.issn.0528-9017.20230872

Abstract

Abstract:

The problem of seedling succulent growth seriously affects the quality of seedlings, and effectively preventing seedling succulent growth is of great significance for cauliflower seedling cultivation. This study focuses on cauliflower as the experimental object. There are a total of 9 treatments in this experiment, and different concentrations of calcium cyclamate (Pro Ca) are sprayed at different stages to study the impact on the growth of cauliflower seedlings. The results showed that spraying a suitable concentration of Pro-Ca at a suitable time could not only effectively inhibit the seedlings height, increase stem diameter, growth function(G value), root-to-shoot ratio, and seedling strength index, and improve the seedling quality, but also significantly increase the chlorophyll content, net photosynthetic rate, transpiration rate, intercellular CO₂ concentration, and stomatal conductance of cauliflower seedlings. However, it had no significant effect on the root morphological characteristics of cauliflower seedlings. Comprehensive analysis showed that the best effect was to apply 150 mg·L^-1 calcium cyclamate to the A1B2 group when the seedlings were fully grown (one week after sowing). Therefore, reasonable application of calcium cyclamate can effectively regulate the seedling type, improve seedling quality, and facilitate the cultivation of strong seedlings.

Key words: cauliflower, prohexadione-calcium, seedling succulent growth, quality of seedings, photosynthesis

CLC Number:

S635.3

ZHOU Tiantian, YANG Wenjie. Effect of prohexadione-calcium on the growth and quality of cauliflower seedlings[J]. Journal of Zhejiang Agricultural Sciences, 2024, 65(5): 1153-1158.

Figures/Tables 6

References 20

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处理	处理时间A	处理浓度B
CK		清水
A1B1	齐苗时	120
A1B2	齐苗时	150
A1B3	齐苗时	180
A2B1	齐苗后1周	120
A2B2	齐苗后1周	150
A2B3	齐苗后1周	180
A3B1	齐苗后2周	120
A3B2	齐苗后2周	150
A3B3	齐苗后2周	180

处理	处理时间A	处理浓度B
CK		清水
A1B1	齐苗时	120
A1B2	齐苗时	150
A1B3	齐苗时	180
A2B1	齐苗后1周	120
A2B2	齐苗后1周	150
A2B3	齐苗后1周	180
A3B1	齐苗后2周	120
A3B2	齐苗后2周	150
A3B3	齐苗后2周	180

指标	处理时间	处理浓度	处理时间×处理浓度
株高	16.30^***	4.87^*	1.32 ns
茎粗	13.80^***	5.11^*	1.81 ns
G值	1.02 ns	7.86^**	0.66 ns
根冠比	0.15 ns	3.28 ns	0.06 ns
壮苗指数	2.04 ns	6.02^**	0.54 ns
叶绿素含量	4.19^*	0.57 ns	1.95 ns
净光合速率	11.70^***	1.16 ns	1.45 ns
气孔导度	29.90^***	0.69 ns	1.22 ns
胞间CO₂浓度	6.91^**	4.23^*	2.20 ns
蒸腾速率	27.20^***	0.43 ns	4.11^**
根长	0.83 ns	0.37 ns	1.41 ns
根表面积	1.14 ns	0.26 ns	0.50 ns
根直径	1.68 ns	0.40 ns	2.91 ns
根体积	1.85 ns	0.15 ns	2.05 ns

指标	处理时间	处理浓度	处理时间×处理浓度
株高	16.30^***	4.87^*	1.32 ns
茎粗	13.80^***	5.11^*	1.81 ns
G值	1.02 ns	7.86^**	0.66 ns
根冠比	0.15 ns	3.28 ns	0.06 ns
壮苗指数	2.04 ns	6.02^**	0.54 ns
叶绿素含量	4.19^*	0.57 ns	1.95 ns
净光合速率	11.70^***	1.16 ns	1.45 ns
气孔导度	29.90^***	0.69 ns	1.22 ns
胞间CO₂浓度	6.91^**	4.23^*	2.20 ns
蒸腾速率	27.20^***	0.43 ns	4.11^**
根长	0.83 ns	0.37 ns	1.41 ns
根表面积	1.14 ns	0.26 ns	0.50 ns
根直径	1.68 ns	0.40 ns	2.91 ns
根体积	1.85 ns	0.15 ns	2.05 ns

处理	D+	D-	C	结果
CK	0.784	0.327	0.294	9
A1B1	0.655	0.644	0.496	5
A1B2	0.377	0.709	0.653	1
A1B3	0.413	0.770	0.651	2
A2B1	0.546	0.612	0.528	4
A2B2	0.513	0.674	0.568	3
A2B3	0.660	0.603	0.478	6
A3B1	0.843	0.293	0.258	10
A3B2	0.600	0.455	0.431	8
A3B3	0.643	0.489	0.432	7