What is the 34 14 exam?

34 14 experiment is an important link of soil testing and formula fertilization.

"34 14" refers to three factors and four levels of nitrogen, phosphorus and potassium 14 treatment.

The meaning of level 4:?

Level 0 means no fertilization?

2 level refers to the best local fertilization?

1 level = level 2 ×0.5?

3 level =2 level × 1.5 (this level is excessive fertilization level). (ice green)?

Extended data

Implementation steps

The technology of soil testing and formula fertilization includes five core links and nine key contents: soil testing and formula fertilization, fertilizer allocation, supply and fertilization guidance.

Field experiment.

Field experiment is the fundamental way to obtain the best fertilization amount, fertilization period and fertilization method for various crops, and it is also the basic link to screen and verify soil nutrient testing technology and establish fertilization index system.

Through field experiments, the optimum fertilization amount, distribution ratio of basal dressing, fertilization period and fertilization method of different crops in each fertilization unit were mastered. Find out the basic parameters such as soil nutrient correction coefficient, soil fertilizer supply, crop fertilizer demand parameters and fertilizer utilization rate; The crop fertilization model was constructed to provide the basis for fertilization zoning and fertilization formula.

Soil testing.

Soil testing formula is one of the important bases for formulating fertilizer formula. With the continuous adjustment of planting structure in China, high-yield crop varieties are constantly emerging, the structure and quantity of fertilization have changed greatly, and the soil nutrient pool has also changed obviously. By detecting soil nitrogen, phosphorus, potassium, medium and trace elements, we can understand the soil fertility.

Formula design.

Fertilizer formula design is the core of soil testing and formula fertilization. By summarizing field experiments and soil nutrient data, fertilization areas in different regions were divided. At the same time, according to the similarities and differences of climate, landform, soil and farming system, combined with expert experience, the fertilization formulas of different crops are put forward.

Calibration test.

In order to ensure the accuracy of fertilizer formula and minimize the risk of batch production and large-scale application of formula fertilizer, three treatments, namely formula fertilization, farmers' habitual fertilization and blank fertilization, were set up in each fertilization zoning unit. Taking local main crops and their main varieties as the research object, this paper compares the yield-increasing effect of formula fertilization, verifies the fertilization parameters, verifies and improves the fertilizer formula, and improves the technical parameters of formula fertilization through soil testing.

Formula processing.

Implementing formula fertilization in farmers' fields is the most critical link to improve and popularize the technology of formula fertilization by soil testing. At present, there are different modes in different regions, among which the most important and promising modes are market operation, factory processing and network operation. This model adapts to the present situation of low scientific and technological quality of rural farmers in China, small scale of land management and separation of technology and material.

Demonstration and promotion.

In order to promote the implementation of soil testing and formula fertilization technology in the field, it is necessary to solve the market operation problem of soil testing and formula fertilization technology and let farmers see the actual effect with their own eyes, which is the "bottleneck" that limits the popularization of soil testing and formula fertilization technology. It is necessary to establish a demonstration area of soil testing and formula fertilization, create a window for farmers, set up a model, and fully demonstrate the technical effect of soil testing and formula fertilization.

Popularizing the "one bag of fertilizer" model and materializing the technology of soil testing and formula fertilization into products is also conducive to breaking the "hard ice" of the "last mile" of technology popularization.

Publicity and training.

The propaganda and training of soil testing and formula fertilization technology is an important means to improve farmers' awareness of scientific fertilization and popularize technology. Farmers are the end users of soil testing and formula fertilization technology, and it is urgent to teach farmers scientific fertilization methods and models; At the same time, it is necessary to strengthen the systematic training of technicians at all levels, fertilizer production enterprises and fertilizer distributors, and gradually establish a system of holding certificates for technicians and fertilizer suppliers.

Effect evaluation.

Farmers are the ultimate executors and implementers of soil testing and formula fertilization technology, and also the ultimate beneficiaries. Test the actual effect of soil testing and formula fertilization, get the feedback information from farmers in time, and constantly improve the management system, technical system and service system. At the same time, in order to scientifically evaluate the actual effect of soil testing and formula fertilization, dynamic investigation must be carried out in a certain area.

Technological innovation.

Technological innovation is the scientific and technological support to ensure the long-term effectiveness of soil testing and formula fertilization. Focus on innovative research in field test methods, soil nutrient testing techniques, fertilizer preparation methods and data processing methods. And constantly improve the technical level of soil testing and formula fertilization.

References:

Baidu encyclopedia-soil testing and formula fertilization