T/NAASS 017-2022 Active Group standards

T/NAASS 017-2022 Ningxia scale dairy farm high moisture corn wet preservation technical regulations

Publish Date: 2022-11-12 Implement Date: 2022-12-16 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/NAASS 017-2022

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: \nFeeds

Publish Date: 2022-11-12

Implement Date: 2022-12-16

Scope

Scope: This document specifies the terminology and definitions, technical requirements, quality evaluation, and measurement methods for high-moisture corn silage storage in large-scale dairy farms in Ningxia. This document applies to large-scale dairy farms and high-moisture corn silage processing enterprises in Ningxia. Main technical content: 3. Terminology and definitions The following terminology and definitions apply to this document: 3.1 High-moisture corn silage Corn kernels or corn cobs harvested directly after maturity, processed under airtight conditions through the fermentation of lactic acid bacteria, also known as wet-stored corn. Wet-stored corn is classified into whole cob storage (cob + corn kernel + kernels), cob storage (corn kernel + kernels), and corn kernel storage. Storage methods include pit storage and stretch-film wrapping. 3.2 Grain broken rate The proportion of broken corn kernels compared to the total number of corn kernels harvested. [Source: T/CAAA 05-2018] 4. Technical requirements 4.1 Harvest period For grain wet-stored corn, harvest should be conducted after the corn kernels reach the late milky stage and early wax stage, when a black layer appears on the kernels. The grain moisture content should be 27%–32%, with an optimum range of 30%–32%. For whole cob and cob wet-stored corn, harvest should be conducted when the kernels reach 30%–35% moisture content during the late milky stage and early wax stage. 4.2 Machinery selection For grain harvesting, use direct-harvesting machines. For corn cobs, use cob-harvesting machines or silage machines equipped with cob-stripping cutting decks. Specialized crushing machines and fixed stretch-film wrapping machines are required. 4.3 Harvest and transportation For grain wet-stored corn, transport to processing sites for crushing within 4 hours after harvest. For cob wet-stored corn, transport to processing sites for crushing within 48 hours after harvest. No unloadi