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Spatial-temporal coupling regulation method of water and fertilizer supply and demand in winter wheat root layer

A winter wheat, space-time technology, applied in the field of time-space coupling regulation of water and fertilizer supply and demand in the root layer of winter wheat, can solve the problems of fertilizer waste, shortage of agricultural water, and nitrogen utilization rate of less than 30%.

Active Publication Date: 2019-10-22
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current per capita water resources and per mu water resources in this region are only 20% and 18% of the national average, and the water productivity is only 1.2kg m -3 About 50% of that of developed countries, water shortage and agricultural water waste coexist; excessive use of chemical fertilizers in production is also common, nitrogen fertilizer utilization rate is less than 30%, significantly lower than that of developed countries, and fertilizer waste is serious
However, according to the law of winter wheat’s demand for water and nutrients and the characteristics of root growth and absorption, replenish soil water and nutrients in a regular, positioned, and quantitative manner to achieve precise matching and coupling of supply and demand, while maintaining high crop yields and avoiding excessive water and fertilizer. The technology of saving water and fertilizer due to investment has not been reported yet

Method used

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  • Spatial-temporal coupling regulation method of water and fertilizer supply and demand in winter wheat root layer
  • Spatial-temporal coupling regulation method of water and fertilizer supply and demand in winter wheat root layer
  • Spatial-temporal coupling regulation method of water and fertilizer supply and demand in winter wheat root layer

Examples

Experimental program
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Effect test

Embodiment 1

[0080] The experiment was conducted on a silt soil plot in Xuanzhuang Village, Daolang Town, Daiyue District, Shandong Province. The contents of clay particles, sand particles and powder particles in the 0-100cm soil layer of the test field were 20.1%, 19.1%, and 60.8%, respectively. 0-20cm soil layer soil contains organic matter 14.23gkg -1 , Total nitrogen 0.72g kg -1 , Containing alkaline hydrolyzable nitrogen, available phosphorus, and available potassium are 94.33, 42.84 and 112.77 mg kg respectively -1 .

[0081] The winter wheat variety Jimai 22 was selected and sown on October 6, 2014, and harvested on June 12, 2015. The fertilizer is made of resin-coated controlled-release urea with a nitrogen content of 42%, ordinary urea with a nitrogen content of 46%, superphosphate and potassium chloride. According to the steps of the temporal and spatial coupling regulation technology of water and fertilizer supply and demand in the winter wheat root layer, the operation is as foll...

Embodiment 2

[0126] The experiment was conducted on a silt soil plot in Xuanzhuang Village, Daolang Town, Daiyue District, Shandong Province. The contents of clay particles, sand particles and powder particles in the 0-100cm soil layer of the test field were 20.1%, 19.1%, and 60.8%, respectively. 0-20cm soil layer soil contains organic matter 14.23gkg -1 , Total nitrogen 0.72g kg -1 , Containing alkaline hydrolyzable nitrogen, available phosphorus, and available potassium are 94.33, 42.84 and 112.77 mg kg respectively -1 .

[0127] The winter wheat variety Jimai 22 was selected and sown on October 6, 2014, and harvested on June 12, 2015. The fertilizer is made of ordinary urea with 46% nitrogen, superphosphate and potassium chloride. According to the steps of the temporal and spatial coupling regulation technology of water and fertilizer supply and demand in the winter wheat root layer, the operation is as follows:

[0128] 1. At the same time as winter wheat is planted, the bottom fertilizer...

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Abstract

The invention relates to a winter wheat root layer water and fertilizer supply and demand space-time coupling regulation and control method. According to the characteristic that the effectiveness of soil layer water conservation at different depths on the growth development and yield formation of winter wheat changes along with change of distribution of winter wheat root systems in soil, and in combination with the natural rainfall quantity within a period of time, soil water conservation is replenished by use of a continuous storage mode in the key growth period of winter wheat; furthermore, according to the fertilizer-absorbing rules of winter wheat in the whole growth period and the distribution characteristics of the root systems in soils along with the growth process, timed, positioned and quantitative fertilization is performed, so that coupling between water and fertilizer supply and demand of winter wheat root layers is realized in space and time. The method is capable of not only keeping relatively high yield of winter wheat, but also obviously saving the irrigation water and reducing the fertilizer input, and is obvious in economical effect, social effect and ecological effect.

Description

[0001] (1) Technical field [0002] The invention relates to a spatiotemporal coupling regulation technology of water and fertilizer supply and demand in the root layer of winter wheat, belonging to the technical field of water and fertilizer regulation of crop cultivation, in particular to a method for timing, positioning, and quantification according to the law of water and nutrient requirements and root growth and absorption characteristics of winter wheat It is a technology to replenish soil water and nutrients in a way that achieves the precise matching and coupling of supply and demand, which not only maintains the high yield of winter wheat but also avoids excessive input of water and fertilizer and significantly saves water and fertilizer. It is suitable for high-yield and high-efficiency cultivation of winter wheat in the Huanghuaihai Irrigation Area of ​​China. [0003] (2) Technical background [0004] my country's per capita water resources are about 2200m 3 At present, 1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01C21/00A01G25/00
Inventor 王东
Owner SHANDONG AGRICULTURAL UNIVERSITY
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