The planting period is divided into winter and spring: the winter period is from november to march of the following year (to avoid severe cold) and the seed storage process can be dispensed with 10-20 days before the spring of the seeding season. The northern tea sector has introduced winter-sowning land-filling techniques, using the soil layer to protect against freezing. The spring broadcast needs to be completed in late february to late march, and delays until april will lead to difficulties in summer and will need to be accompanied by a swarm of seedlings。
The sowing depth follows the 3-5 cm benchmark, with the specific application of mid-wine slightly deeper than spring sowing, and sand soils need to sow further. The hunan test showed that the seeding period of 4. 5 cm depth was 20 days earlier than the seeding period of 9 cm, resulting in an increase of 11. 9 per cent. In the spring-dry zone, using the technique of "deep sanctuaries" or earth-painting, the land is formed into 15 cm high-blown piles of earth, to be bulldozed by seedlings。
The number of sown grains is selected and 4-5 grains per den, and the unpicked tea seed needs to be increased to 4-5 grains. History has recorded a gradual optimization of the standard of 60-70 pots per pit from tang dynasty to ming dynasty, with a three-line configuration of 15 kilograms per acre。
History and technology development
Tang dynasty's tea book was the first to document the way in which the tea seeds were spread, and song won continued this law. Ming dynasty has formed norms for sandy seedlings and cave-sbreeding, and roh ming's tea demotix details the process of post-autumn seeding, sand treatment and even planting. Modern technology has introduced temperature-controlled seedlings (20-30°c heated) and chemical treatments (accumulin impregnated) through which the state-run kiosk teahouses have been built。
Auxiliary technology system reporting
Seed treatment has three phases:
Shrimp management consists of five core measures:
Regional adaptation improved coverage
The wet zone in the south uses routine sowing methods with a range of 1. 5 m x 25 cm range. The north has developed three major improved technologies:
In the shandong tea zone, a new method of "croping the earth" was introduced, with 15 centimetres of land being planted and 83 per cent seedling. The experience of yunnan's ferry teahouse shows that the production of live tea seedlings is 30 per cent longer and drought resistance is significantly improved。
Report on technological strengths and challenges
As of 2024, the technology still has three main advantages:
1.
Reduced the average acre cost by 40 per cent for nursery processes
2.
The seedlings are well developed, and drought-resistant is better than the seedlings
3.
Adapted to large-scale tea park construction with average daily planting efficiency of 7-9 acres/ people
The main challenges are concentrated in the seedling management chain, which requires precision control over three indicators:
