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Straw nitrogen adsorption determination method and determination device

A determination method and technology of straw nitrogen, applied in the field of measurement, can solve problems such as the lack of an effective evaluation method for nitrogen retention capacity

Pending Publication Date: 2020-11-24
HUAZHONG AGRI UNIV
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Problems solved by technology

[0006] The difficulty in solving the above problems and defects is: the lack of an effective evaluation method for scientifically evaluating the nitrogen retention capacity of straw

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  • Straw nitrogen adsorption determination method and determination device
  • Straw nitrogen adsorption determination method and determination device
  • Straw nitrogen adsorption determination method and determination device

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Embodiment 1

[0114] 3 Decomposition and nutrient release characteristics of rice straw mulching and returning to the field

[0115] 3.1 Preface

[0116] Crop straw is an important natural resource. According to statistics, China produces 840 million tons of straw resources every year, accounting for about 19% of the world's total straw resources. Studies have shown that straw is rich in cellulose, lignin, nitrogen, phosphorus, potassium and other nutrients, straw returning to the field can play a great role in renewing soil humus, maintaining the balance of soil organic matter and improving soil, and can Fertilize the soil. Especially in the shortage of potash resources in China, straw potassium can be used as a good potash resource. The research of straw returning in the rape season also shows that straw returning has the functions of moisture conservation in dry land, heat preservation in winter and improvement of soil fertility. Under the conditions of modern, mechanized and industr...

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Abstract

The invention belongs to the technical field of measurement, and discloses a straw nitrogen adsorption measurement method and device. The straw nitrogen adsorption measurement method comprises the steps of simulating field flowing water to scour straws through a dynamic adsorption device, and carrying out the dynamic measurement of the adsorption capacity of the straws for ammonium nitrogen. According to the invention, the nitrogen adsorption performance of the straws is used as a starting material; a method of combining static adsorption and dynamic adsorption is adopted; microcosmic surfacemorphology and surface functional group changes of the straws before and after nitrogen adsorption are analyzed, influence factors of the two kinds of straws on ammonium nitrogen adsorption and adsorption thermodynamics and adsorption kinetics research of the straws on nitrogen are discussed, an adsorption thermodynamics model and an appropriate kinetic model are established, and an adsorption mechanism of the adsorption thermodynamics model and the appropriate kinetic model is speculated. The adsorption characteristics of the straws to the ammonium nitrogen are determined, the fertilizer retention capacities of the two straws to the ammonium nitrogen fertilizer in the early stage of water and fertilizer combination are evaluated, and the mechanism of adsorbing the ammonium nitrogen by thetwo straws is preliminarily revealed.

Description

technical field [0001] The invention belongs to the field of measurement technology, in particular to a straw nitrogen adsorption measurement method and a measurement device. Background technique [0002] At present, according to the main crop harvest index and its annual agricultural production statistics data of the Food and Agriculture Organization of the United Nations (FAO), the total output of straw in the world in 2012 was 5.1 billion tons, and China, the world's largest producer of straw, , The total dry matter of straw is nearly 1 billion tons, accounting for about 20% of the total crop straw in the world. The element composition of straw mainly includes nitrogen, phosphorus, potassium, carbon and some trace elements, etc. Returning crop straw to the field can release various elements of straw to the soil to replenish soil element stocks, and at the same time, crops can obtain returned straw and store it in the soil Nutrients, thereby promoting its own growth and y...

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Application Information

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IPC IPC(8): G01N21/3563G01N23/2251G01N31/00
CPCG01N21/3563G01N23/2251G01N31/002G01N2021/3595
Inventor 丛日环鲁剑巍张洋洋廖世鹏李小坤任涛陆志峰
Owner HUAZHONG AGRI UNIV
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