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A method for determining the amount of nitrogen fertilizer applied to crops

A technology of application rate and nitrogen fertilizer, applied in data processing applications, instruments, calculations, etc., can solve complex, time-consuming, environmental pollution and other problems, and achieve new concepts, scientific principles, and reliable parameters.

Active Publication Date: 2017-11-24
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to propose a method for determining the amount of nitrogen fertilizer applied to crops, so as to solve the time-consuming, complicated and inaccurate problems in the recommendation of the amount of nitrogen fertilizer applied to crops, especially the problem of environmental pollution caused by the accumulation of fertilizers in the soil

Method used

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  • A method for determining the amount of nitrogen fertilizer applied to crops
  • A method for determining the amount of nitrogen fertilizer applied to crops
  • A method for determining the amount of nitrogen fertilizer applied to crops

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Embodiment 1 provides a kind of method for determining the amount of nitrogen fertilizer applied in the wheat-corn rotation system, and calculates the recommended nitrogen application amount of wheat and the recommended nitrogen application amount of corn respectively;

[0047] After our long-term monitoring and analysis of the data of the "National Fertility and Fertilizer Efficiency Monitoring Network", we obtained the following results under the wheat-corn rotation system: NPE 小麦 37.0kg grain / kg N, NPE 玉米 48.0kg grain / kg N; NRE 小麦-玉米 is 0.80.

[0048]

[0049]

[0050] Nitrogen fertilizer application amount in wheat-corn rotation system=wheat yield / 29.6+corn yield / 38.4.

[0051] If the target yield is 6000kg / ha for wheat and 7000kg / ha for corn, then the recommended nitrogen rate is 203kg N / ha for wheat and 182kg N / ha for corn.

Embodiment 2

[0053] Embodiment 2 provides a method for determining the amount of nitrogen fertilizer applied in the wheat-rice rotation system, and calculates the recommended nitrogen application amount for wheat and the recommended nitrogen application amount for rice respectively;

[0054] After our long-term monitoring and analysis of the data of the "National Fertility and Fertilizer Efficiency Monitoring Network", we obtained the following results under the wheat-rice rotation system: NPE 小麦 31.5kg grain / kg N, NPE 水稻 44.0kg grain / kg N; NRE 小麦-水稻 is 0.80.

[0055]

[0056]

[0057] Nitrogen fertilizer application amount in wheat-rice rotation system=wheat yield / 25.2+corn yield / 35.2.

[0058] If the target yield is 6000kg / ha for rice and 4000kg / ha for wheat, then the recommended nitrogen application rate is 170kg N / ha for rice and 159kg N / ha for wheat.

Embodiment 3

[0060] In order to verify whether the recommended nitrogen application rate under the wheat-corn rotation system calculated in Example 1 is scientific and reasonable, it was compared with the optimal nitrogen application rate reported in the literature (see figure 1 and figure 2 ). The results show that the recommended nitrogen application amount obtained by the calculation method of the present invention and the optimal nitrogen application amount obtained by the field test are roughly distributed at about 1:1, indicating that the simple method of the present invention is feasible.

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Abstract

The invention discloses a method for determining nitrogen fertilizer application amount of crops. The method for determining the nitrogen fertilizer application amount of the crops is characterized in that the nitrogen fertilizer application amount is calculated according to the following formula: Nf-opt=Y / (NPE*NREopt), wherein Nf-opt is a crop recommended nitrogen application rate; Y is a target yield; NPE is nitrogen fertilizer physiological use efficiency; NREopt is an apparent accumulative recovery ratio under the recommended nitrogen application rate condition. The method for determining the nitrogen fertilizer application amount of the crops is simple, fast and accurate in calculation, scientific in principle, reliable in parameter and is a nitrogen fertilizer recommendation method based on accumulative use efficiency and a crop yield.

Description

technical field [0001] The invention relates to the technical field of agricultural planting, in particular to a method for determining the application amount of nitrogen fertilizer for crops based on cumulative utilization rate and crop yield. Background technique [0002] On the one hand, the recommended nitrogen application rate for crops can increase fertilizer use efficiency and farmers' income; on the other hand, it can reduce the loss of nitrogen fertilizer from the soil-plant system and reduce environmental pollution. However, it has not been solved to determine the nitrogen application rate of crops accurately, simply and quickly. Due to the variability of nitrogen and the constraints of nitrogen uptake by crops, soil, climate, and the amount, method, and time of nitrogen fertilizer application, the study of nitrogen use efficiency is a very complicated task. Therefore, the seasonal nitrogen utilization rate varies greatly. For example, the seasonal nitrogen utiliz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/02
Inventor 李菊梅马义兵刘杰
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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