GB/T 25241.3-2010Rules for tobacco intensive seedling production - Part 3: Seedling with sand culture (English PDF)

1 Scope

This part of GB/T 25241 specifies the requirements for seedling growth and seedling technology of tobacco sand.

This part applies to tobacco sand cultivation.

2 normative reference documents

The terms of the following documents are the terms of this part by reference to this part of GB/T 25241. Any reference to the date of the text , All subsequent amendments (excluding corrigenda) or revisions do not apply to this part, however, encouragement under this section

The parties to the agreement study whether the latest version of these documents can be used. For undated references, the latest edition of this document applies section.

GB 4455 Polyethylene blown film for agriculture

GB/T 14684 Building sand

Code for design of greenhouse ventilation cooling GB/T Greenhouse Structural Design Load

GB/T 20202 Ethylene-Vinyl Acetate Copolymer (EVA) for Agriculture

GB/T 25240 Tobacco coated pellets

Technical specification for intensive cultivation of tobacco - Part 1. Floating nursery system GB/T 25241.1

JB/T 10286 solar greenhouse structure

JB/T 10288 multi - span greenhouse structure

3 terms and definitions

GB/T 25241.1 established and the following terms and definitions apply to this part of GB/T 25241.

4 seedlings requirements

Tobacco seedling quality. seedling age 55d ~ 75d, the number of leaves per plant 7 ~ 8, 10cm ~ 15cm high stem, stem circumference 1.8cm ~ 2.2cm, leaf color

Positive green, strong toughness of the stalk, handsome disease-free, root system developed, strong resistance, uniform and uniform.

5 nursery site selection

Nursery site selection and peripheral facilities requirements in accordance with the provisions of Chapter 5 of GB/T 25241.1-2010.

6 nursery facilities and materials