T/SXZYC T/SXZYC001-2024 Zizyphus jujuba Seed Quality Standard

Scope

Main Technical Content: I. Inspection Methods 1. Appearance Inspection - Randomly select 10 seeds from each batch of sour jujube seeds and observe their color and morphology under a 4×10 microscope or dissecting microscope. 2. Sampling - The maximum weight of a batch of sour jujube seeds is 10,000 kg, with a minimum sample weight of 1,000 g. The minimum neturity analysis sample weight is 100 g. The specific sampling method shall comply with GB/T 3543.2. - Use the "manual halving method" to divide the test samples as follows: - Pour the sour jujube seeds evenly onto a clean, smooth white paperboard. - Mix the sample vertically and horizontally using a sampling board, repeating the process 4-5 times. - Divide the seed pile into two halves, and then divide each half again, resulting in four uniform portions. Each portion is further divided into eight parts, arranged in two rows of four parts each. - Continue sampling until the weight of the samples in the two triangles approaches the weight of the test sample. 3. Authenticity Identification - Use the seed morphology method to identify the authenticity of the seeds by examining their shape, size, surface features, and color. - Sour jujube seeds are oval or ellipsoidal in shape, with a length of 5-9 mm, a width of 5-7 mm, and a thickness of approximately 3 mm. Their surface is purple-red or purple-brown, smooth and glossy, with some having cracks. Some have a convex bulge on both sides; others are flatter on one side with a raised longitudinal line on the middle. The seed coat is brittle, and the endosperm is white, with two cotyledons, light yellow in color, and high in oil content. 4. Neturity Analysis - Conduct the inspection in accordance with the "Agricultural Seed Inspection Procedures - Neturity Analysis (GB/T 3543.3)" without damaging the seed coat or seed viability. Directly select seeds that meet the specifications. 5. Germination Test

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