Fertilizer used for acidizing soil

A fertilizer and soil technology, applied in the direction of fertilizer mixture, application, fertilization device, etc., can solve the problems of soil acidification, reduce plant absorption of phosphorus, reduce soil water permeability, etc., and achieve the effect of improving buffer and pH value

Inactive Publication Date: 2013-07-03
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, lime substances are generally used in agricultural production to improve acidified soil. The application of lime cannot fundamentally solve the problem of soil acidification, and there are also some adverse effects, such as: reducing soil water permeability, slowing down the growth of leguminous and non-legume crops , reduce plant uptake of phosphorus, etc.

Method used

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  • Fertilizer used for acidizing soil
  • Fertilizer used for acidizing soil
  • Fertilizer used for acidizing soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Choose the peanut field with soil acidification, the pH value of the base soil (soil layer depth 0-20cm) of the test field is 5.0, the field plots are randomly arranged, repeated 4 times, and the area of ​​each plot is 100m 2 .

[0036] Before sowing peanuts in arable land, apply fertilizers consisting of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer, wherein the nitrogen fertilizer chooses calcium nitrate with a mass percentage of N of 12%, and the phosphorus fertilizer chooses P 2 o 5 The mass percentage content is 15% calcium magnesium phosphate fertilizer, potassium fertilizer selection K 2 The mass percent content of O is 4% silicon-calcium-potassium fertilizer;

[0037] The application rate of fertilizer is: N is 6kg / mu, P 2 o 5 6kg / mu, K 2 O is 6kg / mu; before application, mix the required weight of nitrogen, phosphorus and potassium fertilizers and then spread them all at once, plow after spreading, and sow after raining or watering;

...

Embodiment 2

[0041] Every 4 apple trees is a treatment plot, repeated 4 times, randomly arranged, the area of ​​the plot is 80m2 .

[0042] The apple orchard application that soil pH value is 5.2 (soil layer depth 0-40cm) is made up of nitrogen fertilizer, phosphorus fertilizer and potash fertilizer, wherein, nitrogen fertilizer selects the calcium nitrate that the mass percent of N is 12%, and phosphorus fertilizer selects P 2 o 5 The mass percentage content is 15% calcium magnesium phosphate fertilizer, potassium fertilizer selection K 2 The mass percent content of O is 4% silicon-calcium-potassium fertilizer;

[0043] The fertilizer application rate is: N is 1.7kg / 100kg apple, P 2 o 5 1.7kg / 100kg apple, K 2 O is 1.7kg / 100kg apple.

[0044] The apple yield per mu can refer to the average yield of apples in the previous three years. The apple yield in the first three years of this test plot is 2200kg / mu. Calculate the annual application of nitrogen, phosphorus and potassium fertilize...

Embodiment 3

[0055] Select a winter wheat field with soil acidification, the pH value of the base soil (soil layer depth 0-20cm) of the test field is 5.3, the field plots are randomly arranged, 4 repetitions, and the area of ​​each plot is 100m 2 .

[0056] Fertilizers consisting of nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer are applied twice before winter wheat sowing and at the turning green stage, wherein the nitrogen fertilizer chooses calcium nitrate with a mass percentage of N of 12%, and the phosphorus fertilizer chooses P 2 o 5 The mass percentage content is 15% calcium magnesium phosphate fertilizer, potassium fertilizer selection K 2 The mass percent content of O is 4% silicon-calcium-potassium fertilizer.

[0057] The fertilizer application rate is: N is 9kg / mu, P 2 o 5 9kg / mu, K 2 O is 9kg / mu;

[0058] The method of fertilization is: mix 40% of the required weight of nitrogen fertilizer before sowing, all the phosphorus fertilizer and potassium fe...

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Abstract

The invention discloses a fertilizer used for acidizing soil. The fertilizer comprises following effective components: a nitrogenous fertilizer, a phosphatic fertilizer and a potassic fertilizer, wherein a mass ratio of N: P2O5 : K2O is 1:1:1; the nitrogenous fertilizer selects calcium nitrate (containing 12% of N); the phosphatic fertilizer selects calcium magnesium phosphate (containing 15% of P2O5); the potassic fertilizer selects silico-calcium potassic fertilizer (containing 4% of K2O4); the application amount of N, P2O5 and K2O for a peanut field is 6 kg per mu; the fertilizer application amount of N, P2O5 and K2O for apples is 1.7 kg per 100 kg of apples, and the apple yield per mu can refer to a mean value of apple yields of previous three years; and the application amount of N, P2O5 and K2O for winter wheat is 9 kg per mu. The fertilizer can improve pH (potential of hydrogen) of acidized soil (the soil layer depth ranges from 0 to 20 cm) by 0.5-0.7 unit, and improve the yield of crops by 12%-20%.

Description

technical field [0001] The present invention relates to a fertilizer for acidifying soil. Background technique [0002] Soil acidification is a relatively slow process under natural conditions. It usually takes hundreds or even thousands of years for the soil pH to drop by 1 unit. However, the high-input intensive agricultural production in the past 20 years has greatly accelerated the acidification process of farmland soil. Since the 1980s, the soil of the main farmland has been significantly acidified, and the pH of the plow layer soil has dropped by 0.13-0.80, which has led to a decrease in the yield of wheat, corn, peanuts and apples in the field, and aggravated pests and diseases. The main cause of soil acidification in intensive farmland is excessive fertilization, especially the excessive application of nitrogen fertilizer. [0003] At present, lime substances are generally used in agricultural production to improve acidified soil. The application of lime cannot fund...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/80
Inventor 申建波周海燕张福锁
Owner CHINA AGRI UNIV
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