Method for reducing phosphate fertilizer application by activating rice field soil phosphorus

A soil and phosphate fertilizer technology, applied in fertilization methods, chemical instruments and methods, soil conditioning materials, etc., can solve the problems of large amount of organic fertilizer, risk of phosphorus loss, inconvenient application, etc., to accelerate dissolution and mineralization, and reduce chemical fertilizer application The dosage and application are flexible and convenient

Inactive Publication Date: 2020-04-10
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of organic fertilizer per unit of farmland is generally large (for example, more than 300kg per mu), which is inconvenient to apply and difficult to popularize, and because organic fertilizer itself brings in a large amount of phosphorus, there is also the problem of phosphorus surplus and the risk of phosphorus loss

Method used

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  • Method for reducing phosphate fertilizer application by activating rice field soil phosphorus
  • Method for reducing phosphate fertilizer application by activating rice field soil phosphorus
  • Method for reducing phosphate fertilizer application by activating rice field soil phosphorus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: the application of phosphorus activator on potted rice

[0024] The basic physical and chemical properties of the soil are: soil pH value 5.96, total nitrogen content 0.05%, total phosphorus content 0.060%, total potassium content 1.30%, water-soluble phosphorus content 26.70mg / kg, available phosphorus content 133.20mg / kg, Al-P The content is 49.01mg / kg, and the organic matter content is 3.56%. The rice variety planted is Huahang 31.

[0025] Four treatments were set up in the pot experiment: RCK0 was the blank control without phosphate fertilizer, RCK1 was applied superphosphate 4.17g / pot; R1, R2, R3 were the application of humic acid (from lignite), lignin (from paper black liquid) and food waste (monosodium glutamate factory waste residue), its replacement phosphate fertilizer application ratio is respectively 70%, 50%, 30%, that is, R1 is to apply superphosphate 1.25g / pot, and apply activator 2.92g / pot ; R2 is to apply superphosphate 2.09g / pot, apply...

Embodiment 2

[0029] Embodiment 2: the application of phosphorus activator on potted rice

[0030] The basic physical and chemical properties of the soil are: soil pH value 5.87, total nitrogen content 0.05%, total phosphorus content 0.079%, total potassium content 1.25%, water-soluble phosphorus content 29.83mg / kg, available phosphorus content 105.20mg / kg, Al-P The content is 58.05mg / kg, and the organic matter content is 3.61%. The variety of rice planted is Huanghuazhan.

[0031] There were 4 treatments in the pot experiment: CK0 was a blank control without applying phosphate fertilizer, CK1 was applying superphosphate; T1, T2, and T3 used different activators instead of 50% phosphate fertilizer application, and the types and application rates of the activators were shown in Table 2. Each treatment was repeated 4 times, and each pot was filled with 5 kg of soil. The fertilization and transplanting time of each treatment were the same as the daily management. The harvest was unified 90 da...

Embodiment 3

[0035] Example 3: Application of Phosphorus Activator Substituting Part of Phosphorus Fertilizer in Paddy Field Plots

[0036] From July to October 2019, a field test on the application effect of MSG factory waste residue and food waste was carried out in a paddy field in Luoding City, Guangdong Province. Test soil total N, P 2 o 5 and K 2O content is 2.3%, 0.10%, 2.1%, Al-P content 60.2mg / kg, available phosphorus content 15.98mg / kg. The test set-up did not apply phosphate fertilizer (CK0), conventional fertilization (CK1, superphosphate 16.67kg / mu) and phosphorus activator instead of 70% common phosphate fertilizer application (T1, superphosphate 5.00kg / mu, food waste 11.67kg / mu Mu), phosphorus activator instead of 50% common phosphate fertilizer application (T2, superphosphate 8.33kg / mu, food waste 8.33kg / mu), phosphorus activator instead of 30% common phosphate fertilizer application (T3, superphosphate 11.67kg / mu, food waste 5.0kg / mu), a total of 5 treatments. The ar...

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Abstract

The invention discloses a method for reducing phosphate fertilizer application by activating rice field soil phosphorus, activating of the rice field soil phosphorus is realized by activating soil invalid-state phosphorus through a phosphorus activating agent, and the application amount of the phosphorus activating agent is determined according to the phosphorus condition of rice field soil, and the application amount of the chemical phosphate fertilizer is reduced. The phosphorus activating agent is prepared from one or more of humic acid, lignin and food factory waste according to a certainproportion. The phosphorus activator is used as a base fertilizer to be mixed with topsoil soil or is applied to the soil in a mechanical deep application mode while transplanting rice seedlings to realize the purpose of activating fixed phosphorus in the soil for crops to utilize and reducing the application of the phosphorus fertilizer. . The method can significantly improve the effectiveness ofthe soil phosphorus, reduces the application of the phosphate fertilizer, significantly improves the crop yield and effectively reduces the loss of the soil phosphorus. After the product is applied,chemical phosphate fertilizer application can be reduced, and great significance is achieved for relieving phosphorus crisis.

Description

technical field [0001] The invention belongs to the field of agricultural environmental protection, and relates to soil nutrient element control technology and solid waste treatment and disposal technology, in particular to a method for activating paddy field soil phosphorus and reducing phosphorus fertilizer application. Background technique [0002] Phosphorus is an essential nutrient element for plant growth and development. However, the global reserves of phosphate rock resources are being depleted day by day, and phosphorus shortage has become one of the challenges of sustainable development in the 21st century. In addition, water-soluble phosphate fertilizers are quickly combined with Ca, Al, and Fe ions and fixed in the soil after being applied to the soil, making it difficult for plants to absorb and utilize them. Therefore, the seasonal utilization rate of phosphate fertilizers is only 10%-25%. For paddy field soil under flooding state, Fe-P is the available phosph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/14A01C21/00C09K101/00
CPCA01C21/00C09K17/14C09K2101/00
Inventor 毛小云姚欢丽陈娴杨俊颖李吉宏洪嘉乐
Owner SOUTH CHINA AGRI UNIV
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