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Modified attapulgite-based slow release fertilizer special for saline-alkali soil, preparation method and application thereof

A technology of modified attapulgite and slow and controlled release fertilizer, applied in the direction of alkaline orthophosphate fertilizer, application, nitrogen fertilizer, etc., can solve the problem of low nitrogen nutrient utilization rate, poor basic soil strength, large nutrient volatilization and leaching loss and other problems, to achieve the effect of improving specific surface area and adsorption performance, reducing nitrogen loss, and improving cation replacement.

Active Publication Date: 2019-01-18
INST OF SOIL SCI CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved: the present invention aims at the practical problems such as poor foundation of salinized farmland soil, large nutrient volatilization and leaching loss, and low nitrogen nutrient utilization rate, and provides a special slow control system for saline-alkali land based on modified attapulgite soil. Release fertilizer and its preparation method and application

Method used

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  • Modified attapulgite-based slow release fertilizer special for saline-alkali soil, preparation method and application thereof
  • Modified attapulgite-based slow release fertilizer special for saline-alkali soil, preparation method and application thereof
  • Modified attapulgite-based slow release fertilizer special for saline-alkali soil, preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0042] A farmland with moderate saline-alkali barrier in the coastal area of ​​eastern Jiangsu. The soil salinity in the 0-20cm plow layer of the test plot is 2.3-4.4g / kg, the pH is 8.25, the average organic matter content is 5.3g / kg, the total nitrogen is 0.46g / kg, the alkaline nitrogen is 46.82mg / kg, and the available phosphorus is 13.54mg / kg, available potassium 202.18mg / kg, and the soil texture is silt loam. Location: Tiaobei Modern Agriculture Demonstration Base in Tiaozini Reclamation District, Dongtai City, Jiangsu Province. It is a typical representative of saline-alkali barrier cultivated land in the muddy coastal zone. Agricultural planting began in October 2015. The planting method is rice-ryegrass rotation. In May 2017, the 0-20cm plow layer soil samples of the demonstration base were collected as the soil for the indoor soil column leaching experiment. The test time was from August 2017 to October 2017. The average salinity of the tested soil was 2.6g / kg, the or...

Embodiment 2

[0056] Mild, moderate and severe saline-alkali obstacle cultivated land in Jiangsu coastal area. Select test points in three saline-alkali farmlands with different salt gradients, among which the soil salinity of mild saline-alkali farmland test points is 1.6g / kg, pH is 8.91, organic matter is 8.16g / kg, and total nitrogen is 0.68g / kg; The soil salinity in the alkali farmland test site is 3.1g / kg, the pH is 8.43, the organic matter is 6.44g / kg, and the total nitrogen is 0.49g / kg; Nitrogen 0.31g / kg; the soil profile of the test points of the three salt gradients is silt loam, and the average soil bulk density of the plow layer is 1.41g / cm 3 . Location: Tiaobei Modern Agriculture Demonstration Base, Tiaozini Reclamation District, Dongtai City, Jiangsu Province. The test period is from November 2017 to May 2018. Corn is planted in the last stubble and crushed and returned to the field. The test crop was barley, variety Haihua No.1. The main implementation links are as follows: ...

Embodiment 3

[0067] The indoor constant temperature cultivation experiment method was adopted, and the test soil was from the cultivated land with moderate saline-alkali barrier in the Hetao Plain, Inner Mongolia. The soil salinity in the 0-20cm soil layer of the test plot is 3.8g / kg, the pH is 8.47, the organic matter content is 8.36g / kg, the total nitrogen is 0.53g / kg, the alkaline nitrogen is 38.92mg / kg, and the available phosphorus is 10.44mg / kg. The available potassium is 138.63mg / kg, and the soil texture is silt clay loam. Location: No. 1 Community, Chengni Village, Sandaoqiao Town, Hangjinhou Banner, Bayannur City, Inner Mongolia. The trial period is from April 2018 to July 2018. The main implementation links are as follows:

[0068] (1) Preparation of slow and controlled release fertilizer, according to parts by mass: ①Mix 35 parts of modified attapulgite, 16 parts of biochar, 26 parts of monoammonium phosphate, and 12 parts of urea, stir evenly, and put them into a fertilizer gra...

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Abstract

The invention relates to a modified attapulgite-based slow release fertilizer special for saline-alkali soil, a preparation method and an application thereof. The modified attapulgite-based slow release fertilizer is composed of an inner layer, an inner enveloping film, an outer layer and an outer enveloping film in turn from inner to outer, wherein the inner layer is composed of modified attapulgite, charcoal, monoammonium phosphate and urea; the outer layer is composed of corncob powder, complex fungicide and fulvic acid; the inner enveloping film and the outer enveloping film have same components and are both composed of nitrification inhibitor and adhesive. According to the invention, physical absorption of modified attapulgite and charcoal is utilized to reduce nitrogen fertilizer loss; the activity of heterotrophic bacteria is stimulated, so as to promote assimilation and nitrogen fixation; the enveloping films containing nitrification inhibitor are supplemented for controlling release and conversion of fertilizer, regulating release period and rate of nitrogen nutrient and promoting efficient absorption of plants; a virtuous circle system is formed through fertility promotion, crop growth and root exudates applied to surface soil.

Description

technical field [0001] The invention belongs to the technical field of agricultural fertilizers, and in particular relates to a special slow-controlled release fertilizer for saline-alkali land based on modified attapulgite and its preparation method and application. Background technique [0002] Soil salinization is an important obstacle to land degradation and has become an agricultural and ecological issue of global concern. my country currently has about 36 million hectares of salinized land available for use, of which nearly 6.7 million hectares of saline-alkali land has the potential for agricultural improvement and utilization in the near future. Saline soil is an important reserve land resource in my country. Its management and utilization are the actual needs of promoting the balance of cultivated land resources in my country, ensuring regional food security, and promoting regional ecological construction. Nitrogen is an essential macronutrient for crop growth, and...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/08C05G3/80C05G3/90
CPCC05B7/00C05G3/00C05G3/90C05G5/30C05G3/80C05C9/00C05D9/00C05F11/00C05F11/02C05F11/08Y02A40/22Y02P60/21
Inventor 姚荣江杨劲松张新卢俊王相平朱孔志郑复乐
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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