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Soil testing and formula fertilization are based on field tests and soil tests of fertilizers. Based on the laws of fertilizer requirements for crops, soil nutrient supply and fertilizer effects, based on the rational application of organic fertilizers, nitrogen, phosphorus, potassium, and trace elements are proposed. Fertilizer application variety, quantity, fertilization period and application method.
2 Fertilizer
In order to provide plant nutrition into its main material (GB/T 6274-1997 2.1.2).
3 Organic Fertilizer
Primarily derived from plants and/or animals, carbonaceous materials applied to the soil to provide plant nutrition as its main function (2.1.4 of GB/T 6274-1997).
4 Inorganic [mineral] fertilizer
Fertilizers that indicate that the nutrient is in the form of an inorganic salt are produced by extraction, physical and/or chemical industrial methods (2.1.3 of GB/T 6274-1997).
Note: Sulphur, calcium cyanamide, urea and its condensed products, and bone meal superphosphate are customarily classified as inorganic fertilizers.
5 Single fertilizer
Among the three nutrients of nitrogen, phosphorus, and potassium, there is only one generic term for nitrogen fertilizer, phosphate fertilizer, and potash fertilizer (refer to 2.1.16 of GB/T 6274-1997).
6 major nutrients
The general term for elemental nitrogen, phosphorus, and potassium in some countries (2.1.25.1 in GB/T 6274-1997).
7 secondary nutrients
The generic term for elemental calcium, magnesium, and sulfur in some countries (2.1.25.2 of GB/T 6274-1997).
8 trace nutrients, micro-nutriment;
The necessary but relatively small amount of elements for plant growth, such as boron, manganese, iron, zinc, copper, molybdenum, or cobalt, etc. (2.1.25.3 of GB/T 6274-1997).
9 Nitrogen fertilizer
A single fertilizer with nitrogen (N) designation to provide plant nitrogen nutrient as its primary function (NY/T496-2002, 3.7).
10 Phosphate fertilizer
With the indicated amount of phosphorus (P2O5) to provide a single fertilizer with plant phosphorus as its main function (3.8 in NY/T496-2002).
11 Potash Fertilizer
A single fertilizer with the indicated amount of potassium (K2O) to provide plant potassium nutrients as its main function (3.9 in NY/T496-2002).
12 Compound Fertilizer
Among the three nutrients of nitrogen, phosphorus and potassium, there are at least two nutrient-marked quantities of fertilizers made by chemical methods and/or blending methods (2.1.17 in GB/T 6274-1997).
13 Compound Fertilizer
Among the three nitrogen, phosphorus, and potassium nutrients, there are at least two nutrient-labeled fertilizers that are chemically made (GB/T 6274-1997, 2.1.18).
14 Blended Fertilizer
Among the three nitrogen, phosphorus, and potassium nutrients, there are at least two nutrient-labeled fertilizers produced by dry blending (2.1.19 in GB/T 6274-1997).
15 Plant Nutrients
The chemical elements necessary for plant growth (2.1.24 in GB/T 6274-1997).
16 Fertilizer Nutrients
Plant nutrients provided in fertilization (2.1.25 in GB/T 6274-1997).
17 Fertilizer effect
Fertilizer effect is the effect of fertilizer on crop yield, which is usually expressed as the increase in crop yield and benefit that can be achieved by the amount of nutrient applied per unit of fertilizer (3.23 in NY/T 496-2002).
18 amount of fertilizer
The mass or volume of the fertilizer or soil conditioner or nutrient applied to cultivated land per unit area or per unit mass of growth medium (2.1.23 of GB/T 6274-1997).
19 Conventional fertilization
Also known as custom fertilization, refers to the local average fertilization in the previous three years (mainly refers to nitrogen, phosphorus, and potassium fertilizers), fertilization varieties, and fertilization methods (3.5 in NY/T 497-2002).
20 blank controls
No fertilizer treatment was used to determine the absolute value of the fertilizer effect, to evaluate the natural soil productivity, and to calculate the fertilizer use efficiency (3.6 in NY/T 497-2002).
21 Formulated Fertilizer
Based on the soil test and field experiment of fertilizers, according to the law of fertilizer demand of the crops, soil nutrient performance and fertilizer effect, various kinds of simple fertilizers and/or compound fertilizers are used as raw materials to make them suitable for specific areas and specific crops. fertilizer.
22 Fertility
It refers to the productivity of cultivated land that is composed of the characteristics of the soil itself, the natural background conditions, and the infrastructure level under the current management level.
23 Evaluation of Farmland Fertility
The evaluation of cultivated land fertility refers to the process of evaluating the level of potential biological productivity of cultivated land according to the comprehensive characteristics of the interaction of the climate, landform, landform, soil parent material, soil physical and chemical properties, and farmland infrastructure.
24 "3414" Complete Implementation Plan
The "3414" program design absorbs the advantages of less regressive optimal design processing and high efficiency, and is currently a widely applied fertilizer effect field trial program. "3414" refers to nitrogen, phosphorus, and potassium three factors, four levels, and 14 treatments. The meaning of 4 levels: 0 level means no fertilization, 2 level means local recommended fertilization amount, 1 level = 2 level 0.5, 3 level = 2 level 1.5 (this level is excessive fertilization level).
25 "3414" Implementation Plan
To test the effect of one or two nutrients for nitrogen, phosphorus, and potassium, or to implement the "3414" complete implementation plan for other reasons, the relevant treatment can be selected in the "3414" plan, that is, part of the "3414" implementation plan. This not only maintains the integrity of the overall design of soil testing and fertilization field trials, but also takes into account the characteristics of soil nutrients in different regions and the requirements of different test objectives, to meet the needs of different levels. For example, in some regions, it is important to test the effect of nitrogen and phosphorus. On the basis of K2 as a fertilizer base, a nitrogen and phosphorus binary fertilizer effect test can be performed, but three repetitions should be set.
1 Soil Testing and Formula Fertilization