GB/T 42828.1-2023General technology for saline-alkali land improvement—Part 1: Improvement technology by iron tailings (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document is Part 1 of GB/T 42828 "General Technology for Improvement of Saline-alkali Lands". GB/T 42828 has released the following parts.

---Part 1: Iron tailings improvement;

---Part 2: Improvement of rice fields, ponds, fisheries and agriculture;

---Part 3: Biological improvement.

Introduction

According to the requirements of the "National High-Standard Farmland Construction Plan (2021-2030)", in order to promote the technical experience of improving my country's saline-alkali land, we have Finalize this document.

Improving saline-alkali land is of great significance to ensuring national food security and protecting the ecological environment. In order to solve the problem that a single technology is difficult to satisfy the salt To solve the problem of demand for improving saline-alkali land, my country has developed three key technologies. iron tailings improvement, fishery-agriculture coupling, and biological improvement to improve saline-alkali land.

Long-term effectiveness and high efficiency, thereby promoting efficient and high-value utilization of improved saline-alkali land. GB/T 42828 aims to provide relevant parties with three types of salts The requirements and effect evaluation methods of alkaline land improvement technology are planned to be composed of three parts.

---Part 1: Iron tailings improvement. The purpose is to use iron tailings from stable sources and safe quality as saline-alkali soil improvement materials and standardize iron tailings.

Sand improvement technology not only achieves large-scale and standardized improvement of saline-alkali land, but also ensures soil environmental quality and food security, and promotes Promote sustainable development of agriculture.

---Part 2: Improvement of rice fields, ponds, fisheries and agriculture. The purpose is to provide solutions for saline-alkali land improvement using the saline-alkali land rice field, pond, fishery and agriculture model.

Provide technical guidance and improvement effect evaluation basis, solve the problem of the outlet of salt washing and alkaline water discharge during the treatment of saline-alkali land, and achieve ecological benefits.

It can achieve win-win benefits and economic benefits, and promote the comprehensive utilization and sustainable development of saline-alkali land.

---Part 3: Biological improvement. The purpose is to use biological resources such as microbial fertilizers, organic fertilizers and straw, as well as to plant green manure and resistant crops.

The saline-alkali land improvement carried out by biotechnology such as halophytes provides technical guidance and improvement effect evaluation basis, protects land resources, increases economic benefits and promote the comprehensive utilization and sustainable development of saline-alkali land.

1 Scope

This document describes the technical principles of saline-alkali land improvement technology with iron tailings, and stipulates technical requirements, field management and effect evaluation.

This document is applicable to iron ore mining enterprises that use high-silicon iron tailings obtained after crushing, grinding, and magnetic separation physical processes to treat hardened and transparent minerals.

Improve the saline-alkali land with poor soil properties and loamy soil texture.

This document does not apply to improvements where the soil texture is sandy or sandy loam.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 6730.10 Gravimetric method for determination of silicon content in iron ore

GB 15618 Soil Environmental Quality Agricultural Land Soil Pollution Risk Management and Control Standards (Trial)

GB/T 23349 Determination of arsenic, cadmium, chromium, lead and mercury content in fertilizers

GB 38400 Limit requirements for toxic and harmful substances in fertilizers

GB/T 39356 Determination of total nickel, total cobalt, total selenium, total vanadium, total antimony and total thallium content in fertilizers by inductively coupled plasma emission light spectral method

NY/T 496 General principles for rational use of fertilizers

NY/T 1121.1 Soil testing Part 1: Collection, processing and storage of soil samples

NY/T 1121.3 Soil testing Part 3: Determination of soil mechanical composition

NY/T 1121.16 Soil testing Part 16: Determination of total soil water-soluble salts

3 Terms and definitions

The following terms and definitions apply to this document.