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Fertilizing method capable of improving utilization efficiency of phosphate fertilizer in vegetable farmland in south China

A fertilization method and vegetable technology, applied in fertilization methods, fertilization devices, applications, etc., can solve the problems of low utilization efficiency of phosphorus resources, achieve the effect of improving phosphorus utilization efficiency, increasing phosphorus concentration, and improving the ability to absorb activated phosphorus

Inactive Publication Date: 2015-07-08
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the present invention can solve the problem of low utilization efficiency of phosphorus resources due to strong fixation of phosphorus in South China red soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Implementation location: In the vegetable test planting base in Baiyun District, Guangzhou City, the soil was determined to be clay loam, and the total phosphorus content in the soil at a depth of 0 to 20 cm was 1.52%, and the available phosphorus (NaHCO 3 Extraction) was 17.3mg / kg.

[0021] Experimental crop: Bitter melon.

[0022] The type of organic fertilizer tested was self-made chicken manure organic fertilizer (carbon-to-nitrogen ratio 20:1, P 2 o 5 The content is 0.48%; the preparation method is: according to the mass fraction of 100%, 70% of the chicken manure and 30% of the auxiliary material (straw powder) are all mixed evenly, and then composted. Once; the moisture is controlled at 50%-60%, and the material is agglomerated without water droplets by hand, and it will loosen when you let go, and can be directly used), and its fertilization rate is 300kg / mu.

[0023] Test inorganic fertilizer: nitrogen fertilizer, urea containing 46% N mass fraction; phospho...

Embodiment 2

[0027] Implementation location: Guangzhou Zengcheng Vegetable Experimental Planting Base. The soil is sandy loam. 3 Extract) is 11.5mg / kg.

[0028] Experimental crop: zucchini.

[0029] Organic fertilizer used in the test: self-made organic fertilizer, the mass ratio of mushroom dregs and chicken manure in the self-made organic fertilizer is 3:2, pH 7.4, carbon-nitrogen ratio 35:1; preparation method is: according to the mass fraction of 100% , Mix 60% of mushroom dregs and 40% of chicken manure evenly, then compost, and start overturning when the temperature of the compost rises to 55-60°C, once a day; the moisture is controlled at 50%-60%, and the materials are grown by hand. There is no water drop in the lump, it will fall apart when you let go of your hand, and it can be used directly.

[0030] Test inorganic fertilizer: nitrogen fertilizer, urea containing 46% N mass fraction; phosphorus fertilizer, containing P 2 o 5 Calcium superphosphate with a mass fraction of 12%...

Embodiment 3

[0034] Implementation location: Vegetable experimental planting base in Baiyun District, Guangzhou City. The soil is clay loam, the total phosphorus content in 0-20cm soil is 1.86%, available phosphorus (NaHCO 3 Extraction) is 20.1mg / kg.

[0035] Experimental crop: eggplant.

[0036] The type of organic fertilizer used in the test is Zhengda brand commercial organic fertilizer (carbon-to-nitrogen ratio 25:1), and the fertilization rate is 500kg / mu.

[0037] Test inorganic fertilizer: nitrogen fertilizer, urea containing 46% N mass fraction; phosphorus fertilizer, containing P 2 o 5 Calcium superphosphate with a mass fraction of 12%; potassium fertilizer, containing K 2 O mass fraction is 50% potassium sulfate.

[0038] Operation method: First, after soil testing and formula fertilization calculation, the standard fertilization amount of eggplant in this plot is 10.0kg / mu, 8.1kg / mu, 8.6kg / mu for pure nitrogen, phosphorus and potassium; then choose a carbon-nitrogen ratio of...

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Abstract

The invention discloses a fertilizing method capable of improving the utilization efficiency of a phosphate fertilizer in vegetable farmland in south China. The fertilizing method comprises the following steps: testing soil for formulated fertilization, calculating a standard fertilizing amount for soil vegetable, using an organic fertilizer with a mol ratio of carbon to nitrogen of 20-35: 1 as a base fertilizer, spreading 300 to 1000 kg of the organic fertilizer over each mu of the soil in one step 2 to 3 weeks before planting of the vegetable, carrying out plowing and carrying out irrigation once, wherein plowing depth is 10 to 25 cm; and drying a field in the air, applying an inorganic fertilizer as a base fertilizer and carrying out topdressing three times in different growth periods of the vegetable. According to the invention, through application of the organic fertilizer with a certain carbon-to-nitrogen ratio, phosphorus absorption and activation capabilities of crops can be improved, the phosphorus concentration at a rhizosphere area is increased, the utilization efficiency of phosphorus is enhanced, and crop growth and high efficiency utilization of the phosphorus resource are promoted; so the key bottleneck problem of low fixed phosphorus utilization efficiency of red soil where accumulation of the fixed phosphorus is high in China is overcome, and the fertilizing method is of an important practical application value.

Description

Technical field: [0001] The invention belongs to the field of crop production technology and fertilizer application technology, and in particular relates to a fertilization method for improving the utilization efficiency of phosphorus fertilizer in vegetable farmland in South China. Background technique: [0002] The amount of phosphorus fertilizer applied in the process of planting vegetables in southern my country is relatively high, but the soil has a strong ability to fix phosphorus, and a large amount of phosphorus accumulates in the soil, resulting in low utilization efficiency of phosphorus resources. Phosphate rock is a non-renewable resource, and the support and guarantee status of phosphate fertilizer for my country's food security is facing severe challenges. It is estimated that my country accumulated 85 million tons of phosphorus in the soil during 1980-2007. 2 o 5 Above, a huge potential phosphorus pool is formed. Statistical research on soil phosphorus cont...

Claims

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Application Information

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IPC IPC(8): A01C21/00
Inventor 丁效东张士荣李俊良梁斌
Owner QINGDAO AGRI UNIV
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