Field dibbling and mulching method for stevia

Abstract

The present invention provides a field dibbling and mulching method for stevia. The method comprises: digging trapezoidal grooves which are 8-10 cm in upper-side width, 4-6 cm in lower-side width and 5-7 cm in depth; sowing stevia seeds in holes with a hole spacing of 16-18 cm at the bottoms of the trapezoidal grooves; laying drip irrigation belts on the bottoms of the trapezoidal grooves; placing a film over the trapezoidal grooves; covering the film with soil at inter-row gaps; performing drip irrigation in a timely manner to adjust moisture and humidity below the film; when seedlings grow up to reach the film, rupturing the film to free the seedlings; and thinning out the seedlings or filling gaps with seedlings according to the seedling emergence state so as to ensure the seedling density of 11 to 12 thousand seedlings per mu. The method has the advantages that: 1, the conventional stevia seedling transplantation manner becomes obsolete; the use of the mulching film and drip irrigation belts can regulate and control the growth of the stevia; a temperature condition for seed germination is provided; drip irrigation can adjust moisture and humidity, thereby ensuring the germination and emergence of the stevia; manual work is reduced; the production cost is greatly reduced; and the promotional prospect is very promising; and 2, a technical route for manufacturing a seeding machine is provided, and a foundation for mechanized large-area operation for the stevia is laid.

Description

technical field [0001] The invention belongs to the field of planting special crops, and relates to a film-covering method for field-on-demand stevia rebaudiana. Background technique [0002] Stevia rebaudiana, also known as stevia, sweet grass, sweet tea, is a perennial herb of the genus Stevia in the family Asteraceae, native to the Amambai Mountains at the border of Paraguay and Brazil in South America. It was introduced into my country in the early 1980s. At present, the total cultivation area in the country is more than 1 million mu, mainly concentrated in Shandong, Jiangsu, Anhui, Fujian, Gansu and other places. It has become one of the countries with the largest planting area of ​​stevia in the world. Stevia is mainly used to produce stevia sugar, which is the "third sugar source" after sucrose and beet sugar. The sweetness of stevioside contained in its leaves is 200-400 times that of sucrose. The sweetest natural green healthy sweetener, with seven characteristics ...

AI Technical Summary

Problems solved by technology

At the same time, the size of the seedlings at the time of transplanting is closely related to the survival rate after transplanting and the length of the seedling slowing period. Small, stunted, poor drought resistance, low survival rate after transplanting, insufficient number of guaranteed seedlings per mu, difficult to achieve high yield

Stevia has a large amount of seedlings per mu. Generally, 11,000-12,000 seedlings are planted per mu. It takes a lot of labor to complete the transplanting within a few days when the seedlings are of appropriate size. Labor costs account for a large part of the total cost, and most of the rural youth When working outside the home, there will also be a shortage of labor in a short period of time. Therefore, the method of raising seedlings first and then transplanting is the main problem restricting the large-scale planting of stevia

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