Forest soil nutrient classification method

Abstract

The invention discloses a forest soil nutrient classification method. The method comprises the following steps: (1) setting a soil sampling point position, and collecting and detecting the content of soil nutrient; (2) interpolating the content value of the soil nutrient in the region, thereby obtaining a soil nutrient distribution diagram; (3) collecting the annual average increment data of a certain fast-growing forest tree in the quartel (small class) in recent two years in the region; (4) counting the small-class average soil nutrient average value, and taking the points with high nutrient content as a total nutrient fertilization region; and (5) by taking the annual average increment of the forest tree as the yield in each region, calculating the nutritional deficiency relative growth increment, establishing a regression equation between the nutrient of the soil and the relative growth increment of the forest tree, and calculating the nutrient classification index of the corresponding soil according to a relative yield method. The method disclosed by the invention is simple and feasible, the regional soil nutrient classification indexes can be established in a few years, and the test cost and manpower and material resources are saved.

Description

technical field [0001] The invention belongs to the technical field of agriculture, and in particular relates to a method for grading forest soil nutrients. Background technique [0002] Soil nutrient classification is a quantitative evaluation of soil nutrient levels and the main basis for scientific fertilization recommendations. To put it simply, in farmland with strong soil nutrient supply capacity, less fertilizer can be used to meet the needs of healthy crop growth, and vice versa, more fertilizer is needed to provide nutrients. [0003] Soil nutrient classification index is determined according to the correlation between soil nutrient measurement value and crop yield, and soil nutrient index is usually classified according to the relative yield method. The relative yield refers to the ratio of the economic yield of the plot without applying a certain nutrient (nutrient-deficiency zone) to the economic yield of the plot (full fertilizer zone) applying this nutrient in...

AI Technical Summary

Problems solved by technology

The selection of test sites should not only be representative of the region, but also consider different soil types in the region, especially the need to select farmland with different nutrient levels for full-fertilization areas (applying this nutrient) and nutrient-deficient areas (not applying this nutrient). points) Multi-point tests for many years, the test volume is very large, and the test cycle is generally more than 3 years, which requires a lot of manpower, material and financial resources, and the test accuracy is difficult to guarantee

Compared with agricultural experiments, forestry experiments have a long cycle, large scale, and limited terrain. If multi-year multi-point experiments are carried out completely according to the nutrient-deficient area and the full-fertilization area, the amount of experiments will be very large, requiring a lot of manpower, material and financial resources, and the experiments are accurate. degree is also difficult to guarantee

Images