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Method for analyzing response mechanism of rice rhizosphere potassium to organic matters and iron-aluminum oxides

A technology of iron-aluminum oxides and analytical methods, applied in the agricultural field, can solve problems such as unclear regulation mechanism

Pending Publication Date: 2021-08-13
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the above studies, it can be seen that iron, aluminum oxides and organic substances secreted by roots play an important role in the composition and stability of aggregates, but the further impact on the content of potassium in each form of aggregate components and the corresponding regulatory mechanism are not yet known. clear

Method used

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  • Method for analyzing response mechanism of rice rhizosphere potassium to organic matters and iron-aluminum oxides
  • Method for analyzing response mechanism of rice rhizosphere potassium to organic matters and iron-aluminum oxides
  • Method for analyzing response mechanism of rice rhizosphere potassium to organic matters and iron-aluminum oxides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1 Exploring the effects of different fertilization measures on the exchangeable potassium content of paddy soil and the regulation mechanism

[0048] Data Sources and Selection

[0049] Based on Chinese and English databases such as CNKI (https: / / www.cnki.net / ), Wanfang (http: / / www.wanfangdata.com.cn / ) and other Chinese and English databases, relevant literature on experiments carried out on paddy soil in China was retrieved. In further screening of literature, the following criteria were set:

[0050] (1) Field experiments with at least 3 replicates of each treatment were conducted on paddy soil in China, excluding pot experiments and greenhouse experiments;

[0051] (2) The test must contain chemical fertilizer (NPK) and soil exchangeable potassium content data under at least one of no fertilization (CK), NPK with organic fertilizer or straw (NPKM or NPKS) treatments, soil exchangeability Potassium content was determined using neutral ammonium acetate (NH 4...

Embodiment 2

[0055] Example 2 The relationship between soil potassium and iron and aluminum oxides under long-term different fertilization

[0056] Long-term positioning fertilization experiments on paddy soil at 4 points in Nanchang (NC), Jinxian (JX), Chongqing (CQ) and Suining (SN) were selected, and 4 different fertilization treatments were selected at 4 test points: (1) Control No fertilization (CK), (2) chemical nitrogen and phosphorus fertilizer application (NP), (3) NP application with chemical potassium fertilizer (NPK), (4) NPK application with organic fertilizer (NPKM), and planting rice, after the rice is harvested , collect soil samples, measure the content of potassium in the soil, dried straw, potassium in the grain and the content of iron and aluminum oxides in the soil, and use the redundancy analysis method to obtain the relationship between soil iron and aluminum oxides and soil exchangeable potassium, soil Relationship between non-exchangeable potassium. see results ...

Embodiment 3

[0057] Example 3 Distribution characteristics of rhizosphere aggregates, organic matter and iron and aluminum oxides under long-term fertilization

[0058] Test point

[0059] This part of the study is based on the long-term positioning fertilization experiment of red soil double-cropping rice in Jinxian Red Soil Research Institute of Jiangxi Province and Suining purple soil of Sichuan Academy of Agricultural Sciences:

[0060] Four different fertilization treatments were selected from the Suining and Jinxian test sites: (1) No fertilization (CK), (2) Chemical nitrogen and phosphorus fertilizer application (NP), (3) NP application with chemical potassium fertilizer (NPK), (4) NPK is combined with organic fertilizer (NPKM), and the specific fertilizer dosage is shown in Table 1. Each treatment was repeated three times, and a random complete block design was adopted. The plots were separated by cement ridges, and each plot was irrigated independently. Early rice at Jinxian is so...

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Abstract

The invention discloses a method for analyzing a response mechanism of rice rhizosphere aggregate potassium to organic matters and iron-aluminum oxides in a fertilization state, which comprises the following steps of: determining that the content of organic matters has influence on exchangeable potassium in soil in different fertilization modes through confluence analysis of potassium in soil in a nationwide region; obtaining the relation between the exchangeable potassium content and the iron-aluminum oxide content in the rhizosphere soil and the non-rhizosphere soil through a long-term fertilization experiment; through a long-term fertilization experiment, determining the change trend of the content of organic matters and the content of iron-aluminum oxides in the rhizosphere aggregate under different fertilization modes, and analyzing the change and the stability of the component proportion of the rhizosphere aggregate so that the influence of the change of the content of the iron-aluminum oxides and the contact of organic matters on the proportion and the stability of the rhizosphere aggregate is obtained; and through a long-term fertilization experiment, determining the content of potassium in aggregates with different particle sizes, and then determining the relationship between the content of iron-aluminum oxides and the content of potassium in rhizosphere aggregates and the relationship between the content of organic matters and the content of potassium in rhizosphere aggregates.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to a method for analyzing the response mechanism of potassium in rice rhizosphere aggregates to organic matter and iron and aluminum oxides under fertilization. Background technique [0002] At present, there are many studies on the relationship between nutrient fertility and aggregate composition at home and abroad, but they mainly focus on carbon, nitrogen, and phosphorus, while there are few studies on potassium in aggregates. Compared with microaggregates, macroaggregates have a smaller specific surface area and fewer potassium adsorption sites, resulting in a corresponding change in exchangeable potassium content. Most studies showed that the soil exchangeable K content was higher in the 0.5-0.25 mm fraction, while aggregate components had little effect on total K. There are also studies that show that the content of exchangeable potassium in soil decreases gradually wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G16C20/00
CPCG06F30/20G16C20/00
Inventor 蔡岸冬韩天富张会民朱晓艳王斌李玉娥高清竹
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI