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Method for influencing moisture soil nitrogen mineralization characteristics and crop yield by long-term positioned fertilization

A technology for crop yield and soil nitrogen, applied in fertilization methods, botanical equipment and methods, fertilization devices, etc., can solve the problems of crop nitrogen absorption and yield relationship that have not yet been reported.

Inactive Publication Date: 2016-06-29
QINGDAO AGRI UNIV
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Problems solved by technology

In general, there have been many studies on soil nitrogen mineralization under long-term fertilization conditions, but there are few studies on soil nitrogen mineralization under long-term fertilization on non-calcareous fluvo-aquic soils, and the relationship between nitrogen mineralization and crop nitrogen uptake and yield relationship has not yet been reported

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  • Method for influencing moisture soil nitrogen mineralization characteristics and crop yield by long-term positioned fertilization
  • Method for influencing moisture soil nitrogen mineralization characteristics and crop yield by long-term positioned fertilization
  • Method for influencing moisture soil nitrogen mineralization characteristics and crop yield by long-term positioned fertilization

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Embodiment Construction

[0025] In order to further understand the content, features and effects of the present invention, the following examples are given, and detailed descriptions are given below with reference to the accompanying drawings.

[0026] 1 Materials and methods

[0027] 1.1 Experimental design

[0028] The test is located in Laiyang long-term positioning fertilization test base of Qingdao Agricultural University in Laiyang City, Shandong Province. It is located at 120°42′ east longitude and 36°54′ north latitude. The annual evaporation is about 2000mm, and the frost-free period is 209-243 days. The soil tested is non-calcareous fluvo-aquic soil, developed in alluvial parent material, and the topsoil is light loam. Soil layer (0-20cm, the same below) organic matter content 4.10g / kg, total nitrogen (N) 0.50g / kg, total phosphorus (P) 0.46g / kg, available phosphorus (P 2 o 5 ) 15mg / kg, available potassium (K 2 O) 38mg / kg, cation exchange capacity 11.80cmol / kg, pH (H 2 O) is 6.8.

[00...

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Abstract

The invention provides a method for influencing moisture soil nitrogen mineralization characteristics and crop yield by long-term positioned fertilization. By means of in-situ field and anion-cation exchange resin process, the influence of long-term application of nitrogen fertilizer and supportive phosphorus potassium fertilizer upon non-calcareous moisture soil nitrogen in-situ field mineralization characteristics, crop nitrogen absorption and crop yield is studied, and a relation of the influence with crop nitrogen absorption and crop yield is studied; total nitrogen of soil and plants is measured by Kjeldahl determination, NO3<->-N and NH4<+>-N in soil and ion exchange resin bags are extracted with KCl solution, and after filtering, determinations are made respectively by means of dual-wavelength ultraviolet spectrometry and Nessler's reagent colorimetry. Theoretical basis is provided for the sustainable development of a soil nitrogen nutrition bank, controlling of soil nitrogen supply in this area and achievement of high crop yield.

Description

technical field [0001] The invention belongs to the technical field of agricultural industry, and in particular relates to a method for affecting the nitrogen mineralization characteristics of fluvo-aquic soil and crop yield by long-term positioning fertilization. Background technique [0002] Compared with conventional experiments, long-term targeted fertilization has the advantages of long-term time and climate representativeness, which can reveal the evolution of soil fertility, evaluate fertilizer benefits, and study the impact of fertilization on the sustainable development of farmland ecosystems. Since the first long-term fertilization experiment in Lausanne, England in 1843, long-term fertilization experiments abroad have a history of more than 170 years, and a wealth of scientific research data has been accumulated; however, domestic research started late and there is a big gap. Nitrogen mineralization refers to the process of transforming soil organic nitrogen into ...

Claims

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Application Information

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IPC IPC(8): A01C21/00A01G1/00A01G7/06
CPCA01C21/005A01G7/06A01G22/00
Inventor 刘树堂南镇武刘锦涛陈延玲袁铭章辛励
Owner QINGDAO AGRI UNIV
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