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Method for testing energy flow in food web by using europium element

A technology for element determination and food web, applied in the field of ecology, can solve the problems of high equipment requirements and cumbersome operation, and achieve the effect of simple steps, wide application range and high precision

Inactive Publication Date: 2015-03-11
EAST CHINA UNIV OF TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a simple and accurate method for measuring the energy flow in the food web using europium to solve the problems of high equipment requirements and cumbersome operation in the prior art

Method used

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  • Method for testing energy flow in food web by using europium element

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Embodiment 1

[0035] 1. Rice cultivation

[0036] On April 15, 2014, 50 g of rice seeds were weighed and placed in an artificial climate box (model QHX-300BS-Ⅲ was purchased from Shanghai Xinmiao Instrument Co., Ltd.) at a temperature of 25°C ± 0.5°C, soaked for 24 hours, and soaked the seeds Change the water every 12 hours during the period. After soaking the seeds, pour out the water, wrap the seeds with gauze, and continue to place them in an artificial climate box with a temperature controlled at 25°C±0.5°C to let the rice seeds germinate. The germination time is 3 days. During the period, the water should be properly replenished according to the degree of water retention of the seeds, and the water should not submerge the seeds. On April 19, in 4 cultivation pots of equal volume, 16 rice seeds with good germination and uniformity were sown in each pot. Cultivation pots were set into 4 groups, one of which was a blank control group, placed in the Ecology Laboratory of the Department of...

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Abstract

The invention discloses a method for testing the energy flow in a food web by using a europium element. The energy flow of the food web is tested by using a method that a system that rice-pest-natural enemy of pest is marked by using Eu<3+> is adopted to sample and test the content of the Eu element of different trophic levels. Compared with the prior art, the method is simple to operate, is not limited by special equipment and has good application and popularization prospect, and the manpower and material resources can be saved.

Description

technical field [0001] The invention belongs to the field of ecology, and in particular relates to a method for measuring energy flow in a food web by using europium element. Background technique [0002] Energy flow is one of the shared functions and characteristics inherent in all ecosystems. Ge Feng, Chen Changming and Ding Yanqin have studied the energy flow of rice Nilaparvata lugens and cotton field ecosystem by using the method of biomass and calorific value measurement. [0003] For the quantitative study of ecosystem energy flow, the traditional methods include energy conversion method and quantitative growth and decline method, such as Su Qingrui (1997) analysis of ecosystem energy flow in the main corn producing area in Northeast China, Yang Jiming et al. A preliminary study of streams. In recent years, stable isotope techniques have been widely used in ecology. However, this technology is mainly used for the analysis of animal feeding habits, trophic level rel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/33G01N1/28
Inventor 王雅葛建忠何芳胡国光袁凤辉
Owner EAST CHINA UNIV OF TECH
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