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Water-fertilizer integrated fertilizing method for corn based on nitrogen element balance of farmland

A technology of farmland nitrogen and fertilization methods, which is applied in the field of corn water and fertilizer integrated fertilization, can solve problems such as excessive fertilization, single fertilization structure, and environmental pollution, and achieve the effects of reducing pollution and improving utilization efficiency

Inactive Publication Date: 2015-10-14
INNER MONGOLIA AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In my country, the long-term partial application of nitrogen fertilizers, and the unbalanced application of nitrogen, phosphorus, and potassium fertilizers have become extremely serious. The single fertilization structure, excessive fertilization, and neglect of the utilization of soil and environmental nutrients have resulted in low fertilizer use efficiency and serious environmental pollution.

Method used

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  • Water-fertilizer integrated fertilizing method for corn based on nitrogen element balance of farmland
  • Water-fertilizer integrated fertilizing method for corn based on nitrogen element balance of farmland
  • Water-fertilizer integrated fertilizing method for corn based on nitrogen element balance of farmland

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 (N 0 P 2 )

[0029] Apply basal fertilizer before corn sowing, the basal fertilizer is urea 0kg / hm 2 (accounting for 40% of pure nitrogen), calcium superphosphate 1125kg / hm 2 ; Before the first water, in late May, topdress urea 0kg / hm with a seeder 2 Around the roots of corn; before Ershui, in mid-June, topdress with 0kg / hm of urea with a seeder 2 Around the roots of corn; before Sanshui, in mid-July, topdress urea 0kg / hm with a seeder 2 Around the roots of corn; before Sishui, in early August, rehydrate corn;

Embodiment 2

[0030] Embodiment 2 (N 1 P 2 )

[0031] Apply basal fertilizer before corn sowing, the basal fertilizer is urea 117.4kg / hm 2 (accounting for 40% of pure nitrogen), calcium superphosphate 1125kg / hm 2 ; Before the first water, in late May, topdress urea 58.7kg / hm with a seeder 2 Around the roots of corn; before Ershui, in mid-June, topdress 58.7kg / hm of urea with a seeder 2 Around the roots of corn; before Sanshui, in mid-July, topdress 58.7kg / hm of urea with a seeder 2 Around the roots of corn; before Sishui, in early August, rehydrate corn;

Embodiment 3

[0032] Embodiment 3 (N 2 P 0 )

[0033] Apply basal fertilizer before corn sowing, the basal fertilizer is urea 235kg / hm 2 (accounting for 40% of pure nitrogen), calcium superphosphate 0kg / hm 2 ; Before the first water, in late May, topdress urea 117.5kg / hm with a seeder 2 Around the roots of corn; before Ershui, in mid-June, topdress urea 117.5kg / hm with a seeder 2 Around the roots of corn; before Sanshui, in mid-July, topdress urea 117.5kg / hm with a seeder 2 Around the roots of corn; before Sishui, in early August, rehydrate corn;

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Abstract

The invention discloses a water-fertilizer integrated fertilizing method for corn based on nitrogen element balance of farmland. The recommended optimal fertilizing quantity of a nitrogenous fertilizer is determined through the following formula: the recommended optimal fertilizing quantity of the nitrogenous fertilizer is equal to a difference value substracted the nitrogen supply quantity of soil from the sum of the nitrogen absorbing quantity of crops and the surplus of the nitrogen element; the optimal fertilizing quantity of the recommended nitrogenous fertilizer is distributed according to the following proportion: 40% of a base fertilizer, 20% of a jointing fertilizer, 20% of an ear setting fertilizer and 20% of a grain growing fertilizer. The water-fertilizer integrated fertilizing method disclosed by the invention aims to achieve the purposes of improving the water-fertilizer utilization efficiency of the crops and alleviating agricultural point source pollution from sources. The soil nutrient content, the plant nutrient content, the transshipment contribution rate of the nitrogen element, and the like need to be determined, and the ecological optimal nitrogen fertilizing quantity considering environmental factors can be obtained.

Description

technical field [0001] The invention relates to the fields of plant nutrition and ecological environment, in particular to a corn water and fertilizer integrated fertilization method based on farmland nitrogen balance. Background technique [0002] With the gradual control of regional industrial and urban pollution by the country, the water pollution from irrigated areas with farmland as the core is becoming the main source of pollution affecting the water quality of the Yellow River. The results of the first national survey of pollution sources show that the chemical oxygen Pollutants such as nitrogen and total phosphorus accounted for 44%, 57% and 67% of the country's total emissions respectively. Agricultural non-point source pollution has the characteristics of potentiality, randomness, extensiveness, complexity and hysteresis, and is currently facing a difficult situation to cure. In the process of agricultural production, the amount of chemical fertilizers is increasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00
Inventor 杨树青史海滨刘德平马金慧刘瑞敏常春龙符鲜苏瑞东唐秀楠柴慧祥马璐瑶张华
Owner INNER MONGOLIA AGRICULTURAL UNIVERSITY