Effect of Nano Urea, GA 3, Boron and Calcium on Growth, Yield, and Quality of Strawberry (Fragaria × ananassa Duch.) cv. Winter Dawn
A field experiment on strawberry cv. 'Winter Dawn' demonstrated that while the combined foliar application of GA3, boron, and calcium nitrate maximized vegetative growth, yield, and economic returns, the combination of nano urea, boron, and calcium nitrate was most effective for enhancing fruit quality parameters such as TSS, ascorbic acid, and total sugar.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Imagine a strawberry plant as a tiny, hungry construction crew. To build a perfect, juicy fruit, this crew needs two main things: a steady supply of building materials (nutrients) and a clear set of instructions on how fast to work and when to start (growth signals). In the world of farming, scientists have long known that giving plants extra food, like nitrogen or calcium, helps them grow. They also know that special chemical messengers, called plant growth regulators, can tell a plant to stretch taller or bloom sooner. But recently, a new tool has entered the toolbox: "nano" technology. Think of nano-fertilizers as super-powered, microscopic delivery trucks that can slip right through the plant's leaves, dropping off nutrients exactly where they are needed without wasting any.
Now, picture a strawberry farmer trying to get the biggest, sweetest, and most profitable harvest possible. They face a tricky puzzle: which combination of these tools works best? Should they use the nano-delivery trucks, the growth signals, or a mix of both? And which specific ingredients—like boron (which helps build strong cell walls) or calcium (which keeps the fruit firm)—should be added to the mix? This isn't just about making a bigger berry; it's about making a berry that tastes amazing, lasts longer on the shelf, and actually makes money for the farmer. The question is: what is the ultimate "recipe" for a perfect strawberry?
This paper dives into that exact puzzle. Researchers set up a field experiment in a controlled greenhouse in Prayagraj, India, to test different "cocktails" of nutrients and growth regulators on a specific type of strawberry called 'Winter Dawn'. They wanted to see how seven different treatments would affect the plants' growth, the number and size of the fruits, the taste and nutritional quality, and finally, the profit margin.
The scientists grew the strawberries using a standard layout and applied their treatments at specific times: 25, 50, and 75 days after planting. The treatments ranged from a simple control group (no extra additives) to complex mixes involving Nano Urea (a super-efficient nitrogen source), GA3 (a growth hormone that makes plants stretch), Boron, and Calcium Nitrate. They measured everything from how tall the plants got and how many leaves they had, to the weight of individual fruits and the sugar content inside them. They even crunched the numbers to see which method gave the best return on investment.
The results revealed a clear winner for getting the most fruit, and a different "champion" for the best taste. When it came to raw growth and yield, the treatment labeled T7 was the undisputed king. This mix contained GA3 (150 ppm) + Boron (0.6%) + Calcium Nitrate (1.0%). Plants treated with T7 grew the tallest (reaching 19.10 cm), spread the widest (up to 22.16 cm in one direction), and produced the most leaves (18.60 per plant). More importantly, they produced the biggest and heaviest fruits, with individual berries weighing up to 15.46 g. The total harvest per plant was a massive 320.47 g, and this method also delivered the highest profit, with a benefit-cost ratio of 1:2.74. Essentially, if a farmer wants the biggest harvest and the most money, this is the recipe to follow.
However, if the goal is pure flavor and nutritional punch, the spotlight shifts to treatment T6. This mix swapped the growth hormone (GA3) for Nano Urea (0.2%), while keeping the Boron and Calcium. This combination didn't produce the biggest plants, but it created the highest-quality fruit. The berries from T6 had the highest sugar content (7.20%), the most Vitamin C (61.10 mg/100 g), and the highest Total Soluble Solids (10.27°Brix), which is a measure of sweetness. While T7 was the volume champion, T6 was the quality champion, proving that different ingredients drive different parts of the plant's performance.
The study also used advanced statistical tools to look at how all these factors relate to each other. They found that when a plant grows bigger and has more leaves, it almost always leads to bigger, heavier fruits. They also discovered that the treatments that improved growth generally improved the sugar-to-acid ratio, making the fruit taste better. Interestingly, the treatments that made the plants flower the earliest (around 58.47 days with T4) didn't necessarily produce the biggest fruit, showing that speed isn't always the same as size.
In the end, the paper concludes that for farmers growing 'Winter Dawn' strawberries in a protected environment, there isn't just one "magic bullet." Instead, there are two top-tier strategies. If you want maximum yield and profit, the GA3 + Boron + Calcium mix (T7) is the way to go. If your priority is producing the sweetest, most nutrient-dense berries, the Nano Urea + Boron + Calcium mix (T6) is the superior choice. The research suggests that by carefully choosing which "cocktail" to use, farmers can tailor their harvest to meet specific market demands, whether that's volume or premium quality.
Drowning in papers in your field?
Get daily digests of the most novel papers matching your research keywords — with technical summaries, in your language.