Pollution-reducing fertilization method in rice paddy field

A fertilization method and paddy field technology, applied in the field of farmland non-point source pollution control, can solve problems such as pollution, water pollution, migration, etc., and achieve the effect of increasing rice production and reducing fertilizer costs

Active Publication Date: 2013-04-24
GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A considerable part of the nitrogen and phosphorus fertilizers applied to rice fields accumulate in the field water in the form of solutes or particles, which can easily migrate to the surface water system with field drainage or rainfall runoff, causing water pollution
This pollution effect is even far greater than the crop yield benefit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The demonstration was applied to the early rice in 2011. The fertilizers used were all conventional commercially available fertilizers. The specific implementation steps and methods are as follows:

[0023] (1) Determine the target yield of rice as 7087.5-7425.0kg / hm 2 . Before the demonstration application, a plot test was set up, and it was determined that under the condition of increasing organic fertilizer, the application amount of nitrogen and phosphorus fertilizer was reduced by 31% and 37% respectively compared with the local conventional application amount, which is the optimal application amount of nitrogen and phosphorus fertilizer, that is, the nitrogen, phosphorus fertilizer application amount of this technology Phosphorus application amount (converted to pure amount) is 160.8kg / hm 2 and 28.4kg / hm 2 .

[0024] (2) Trim the paddy field ridge before fertilization, and increase the height of the ridge by 5-10cm.

[0025] (3) Apply base fertilizer before ...

Embodiment 2

[0033] (1) The demonstration was applied to early rice in 2012, and the implementation steps and methods were the same as in Example 1.

[0034] (2) Implementation effect: Compared with the local conventional fertilization method, after adding organic fertilizer to rice, the amount of nitrogen and phosphorus fertilizer application decreased by 31% and 37% respectively, and the average cost of fertilizer input was reduced by 763 yuan / hm 2 ; Rice production increased by 7.6%, and the average income of farmers increased by 2649 yuan / hm 2 . Nitrogen and phosphorus losses in paddy fields can be reduced by 24% and 34% respectively.

[0035] Table 2 Comparison of nitrogen and phosphorus reduction fertilization and local conventional fertilization (early rice in 2012)

[0036]

[0037] *Rainfall is 15mm.

Embodiment 3

[0039] The demonstration was applied to the early rice in 2011. The fertilizers used were all conventional commercially available fertilizers. The specific implementation steps and methods are as follows:

[0040] (1) Determine the target yield of rice as 7087.5-7425.0kg / hm 2 . Before the demonstration application, a plot test was set up, and it was determined that under the condition of increasing organic fertilizer, the application amount of nitrogen and phosphorus fertilizer was reduced by 31% and 37% respectively compared with the local conventional application amount, which is the optimal application amount of nitrogen and phosphorus fertilizer, that is, the nitrogen, phosphorus fertilizer application amount of this technology Phosphorus application amount (converted to pure amount) is 160.8kg / hm 2 and 28.4kg / hm 2 .

[0041](2) Trim the paddy field ridge before fertilization, and construct the paddy field system as attached figure 1 And attached figure 2 As shown,...

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Abstract

The invention relates to a pollution-reducing fertilization method in a rice paddy field. The pollution-reducing fertilization method comprises the following steps of: using an organic fertilizer to replace one part of a nitrogen fertilizer and a phosphate fertilizer for rice, dividing the nitrogen fertilizer into two parts, using one half of the nitrogen fertilizer as a basic fertilizer, using the other half of the nitrogen fertilizer as an additional fertilizer, preferably sequentially applying the nitrogen fertilizer during early tillering stage, active tillering stage and booting stage according to 58%, 24% and 18% of total top-dressing quantity, additionally reasonably heightening a ridge before fertilization, deeply applying the basic fertilizer into a soil layer, and performing no drainage and irrigation after top-dressing. According to the method disclosed by the invention, through reasonable fertilization and water management, the application quantity of the nitrogen fertilizer and the phosphate fertilizer is effectively reduced, the loss of the nitrogen fertilizer and the phosphate fertilizer in the rice paddy field is reduced, and the nitrogen and phosphorus pollution to the surrounding environment, which is caused by the rice paddy field, is also reduced.

Description

technical field [0001] The invention relates to the technical field of farmland non-point source pollution control, in particular to a pollution reduction and fertilization method for paddy fields. Background technique [0002] Rice is the most important food crop in southern my country, and one of the main sources of nitrogen and phosphorus in rice fields is artificial fertilization. In the process of rice planting, there have always been problems of partial application of chemical fertilizers and excessive application of chemical fertilizers in pursuit of yield, but in fact the utilization rate of applied chemical fertilizers is not high. Generally, the utilization rate of nitrogen fertilizer is only 30% to 40%, and the utilization rate of phosphorus fertilizer is also low. Only 8% to 20%. A considerable part of the nitrogen and phosphorus fertilizers applied to rice fields accumulate in the field water in the form of solutes or particles, which can easily migrate to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00
Inventor 卓慕宁李定强廖义善谢真越
Owner GUANGDONG INST OF ECO ENVIRONMENT & SOIL SCI
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