Is Sugarcane a Fruit?
While chewing the sweet and juicy sugarcane at street stalls, many people wonder: does this delicious stem belong to the category of fruit or something else? As the most important sugar crop globally, sugarcane possesses unique values in its biological characteristics and cultivation practices.
Biological Attributes of Sugarcane
The Key Difference Between Stalk and Fruit
Botanists have clearly pointed out that sugarcane is a perennial herbaceous plant belonging to the Poaceae family. The part we consume is its stem rich in sugar, which is fundamentally different from fruits like apples and bananas that develop from ovaries. The cross-section shows its distinct segmented structure, with each segment wrapped in fibrous epidermis and sugar-storing parenchyma cells.
Special Classification of Edible Varieties
The sugarcane available on the market is mainly divided into two types: sugar cane, with a sugar content as high as 18%, is used specifically for the sugar industry; fruit sugarcane has about 12% sugar content, with fine fibers that can be chewed directly. Although the latter is called "fruit sugarcane," it is still a stem crop and belongs to the same group of edible organs as sweet potatoes and potatoes.
Management of Sugarcane Cultivation Cycle
Golden Period of Spring Sowing
In areas south of 25 degrees north latitude, planting usually occurs from February to April when the daily average temperature is stable at above 20℃. Using the oblique planting method of double-bud stem segments with a 30cm row spacing, combined with phosphorus-potassium-based fertilizers can increase the germination rate. From May to July, it enters the rapid growth period, requiring an average monthly rainfall of 100mm.
Key Points for Autumn Cultivation
For autumn sugarcane planted from late August to early September, early-maturing varieties should be selected. Using plastic mulch to maintain soil temperature results in a more substantial sugar accumulation when harvested in December. The sugar content of autumn sugarcane in the Yuanjiang Valley of Yunnan can be 2-3 percentage points higher than that of spring sugarcane.
Temperature Difference Control Technology
When the day-night temperature difference reaches 10℃, the photosynthetic assimilation efficiency of sugarcane increases by 40%. The sugarcane area in Chongzuo, Guangxi, creates a temperature difference through terraced field planting, bringing the sugar purity to 99.6%. Combined with a drip irrigation system for precise water control, the yield per mu can exceed 8 tons.
From plant classification to cultivation practice, sugarcane demonstrates its unique value. Correctly understanding the nature of its stem, mastering the precise combination of temperature and agricultural timing, not only allows us to taste the natural sweetness but also contributes to the sustainable development of the sugar industry economy.