Strawberry Growth Regulation & Fruit Development
隐藏域元素占位
Strawberry Growth Regulation & Fruit Development
Application of Regulators for Strawberry Growth Regulation and Fruit Development
Sodium Nitrophenolate
After transplanting strawberries, applying a solution of 6 mg/L sodium nitrophenolate supplemented with 0.1%–0.3% urea—either as a foliar spray or root drench every 5–7 days—can extend the harvest period and increase sugar content.
Brassinolide
Foliar spraying with a 0.02–0.05 mg/L brassinolide solution once during full bloom and again 15 days after flowering significantly promotes strawberry growth and development while improving fruit quality.
Triacontanol
Spraying a 0.1 mg/L triacontanol solution during the green-up stage and the onset of flowering increases chlorophyll content, enhances the efficiency of leaf light energy utilization, and boosts yield.
Gibberellic Acid (GA3)
Spraying 10 mg/L gibberellic acid twice—at the early bud stage of the primary inflorescence and again 10 days later—significantly reduces fruit rot and increases inflorescence length (averaging 20.8 cm). This positions the fruit to hang conveniently over the edge of the planting furrow, facilitating management; the harvest period is advanced by 13 days compared to the control, thereby increasing economic value.
DCPTA
Uniformly spraying the entire plant with a 20–30 mg/L DCPTA solution during early flowering, post-fruit set, and the fruit expansion stage results in improved flavor and juiciness, higher sugar content, increased individual fruit weight, earlier harvest, higher yields, and enhanced stress resistance. Diethyl aminoethyl hexanoate
Foliar spraying with a 20 mg/L diethyl aminoethyl hexanoate solution during the young leaf growth stage of strawberry cultivars such as 'Sweet Charlie', 'Hongyan', and 'French No. 3' regulates leaf stomatal conductance, increases chlorophyll content and net photosynthetic rate, delays leaf senescence, and promotes leaf growth. Spraying the entire plant three times at 7-day intervals—specifically targeting the inflorescences—with a 20 mg/L solution before and after flowering (on cultivars such as 'Saiwa', 'Shuoxiang', 'Fengxiang', and 'Hongyan') increases yield per plant, fruit soluble solids, and total acid content, while improving fruit quality and the marketable fruit rate. However, treatment with a higher concentration (40 mg/L) inhibits leaf and fruit growth in most cultivars, demonstrating a pattern where low concentrations promote growth while high concentrations inhibit it.
Naphthaleneacetic acid (NAA)
Applying 50–150 mg/L NAA solution to the flower centers (using a needle-free syringe to spray 5 mL onto the inflorescence and growing point) during the early flowering, full bloom, and fruit-setting stages, combined with a foliar spray of 0.3% boric acid 10 days before flowering, reduced the rate of malformed fruit from 25.26% (control) to a range of 9.92%–15.25%. The treatment combining 100 mg/L NAA with 0.3% boric acid yielded the best results, reducing the malformation rate by 60.73% compared to the control.
Paclobutrazol
Foliar spraying with 250 mg/L paclobutrazol after strawberry transplanting reduces the number of runners by more than 80% and more than doubles the branching of new crowns; while it does not affect the dry weight of the rhizome, it increases the number of flowers and the yield, without affecting strawberry growth in the following year.
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