Method of determining application rate of phosphate fertilizer for sugarcane field

A technology of application rate and sugarcane field, applied in the direction of fertilization method, application, fertilization device, etc., can solve the problem of less response research, achieve the effect of increasing yield and avoiding waste

Active Publication Date: 2019-09-06
广东省科学院南繁种业研究所
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Problems solved by technology

At present, there are few studies on the comparison of the seasonal utilization rate of sugarcane phosphorus fertilizer in different test points of acidic red soil and its response to soil available phosphorus conten...

Method used

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  • Method of determining application rate of phosphate fertilizer for sugarcane field
  • Method of determining application rate of phosphate fertilizer for sugarcane field
  • Method of determining application rate of phosphate fertilizer for sugarcane field

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Embodiment Construction

[0029] The present invention selects 35 test points in Zhanjiang area, the main sugarcane area in Guangdong, investigates the sugarcane yield and soil phosphorus nutrient status under different phosphorus application treatments, analyzes the response relationship of sugarcane yield, phosphorus absorption, phosphorus fertilizer utilization rate to available phosphorus, and the soil Phosphorus balance, aimed at exploring the scientific management of soil available phosphorus levels, and providing a theoretical basis for reducing chemical fertilizer application and increasing efficiency in sugarcane production.

[0030] 1 Materials and methods

[0031] 1.1 Test site

[0032] The research area is the sugarcane area in western Guangdong, including a total of 35 different test points distributed in Xuwen, Leizhou, Suixi, Huazhou and other counties and cities, including 16 in Suixi County, 11 in Leizhou City, 6 in Xuwen County, and 6 in Huazhou City. 2, the specific distribution is ...

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Abstract

A method of determining application rate of phosphate fertilizer for a sugarcane field comprises 1) selecting sites and applying the fertilizer, to be specific, selecting tens of test sites from a sugarcane area, and treating with four different phosphorus application plans; 2) acquiring and measuring samples; 3) simulating a relationship between crop yield and rapidly available phosphorus contentof soil through a double-straight-segment model, a linear-platform model and a Mitscherlich model so as to determine agricultural threshold of rapidly available phosphorus for sugarcane being 22.8 mgkg<-1>; 4)performing integrated yield response, phosphate fertilizer utilization and soil fertility analysis to determine a suitable range of rapidly available phosphorus content of soil for the sugar area being 22.9-50 mg kg<-1>; and 5) determining recommended phosphorous application rate of 120 kg P2O5/ha for the soil having the rapidly available phosphorus content close to the agricultural threshold of phosphorus. The phosphate fertilizer application rate for the sugarcane field determined via the method herein is significant to the guidance on sugarcane production and efficient use of phosphate fertilizer and to the avoidance of waste of finite phosphorite resources and major environmental pollution risk.

Description

technical field [0001] The invention relates to a method for determining the amount of fertilizer applied in a sugarcane field, in particular to a method for determining the amount of phosphorus fertilizer applied in a sugarcane field. Background technique [0002] Sugarcane is one of the most important sugar crops in the world. It is also an important energy and feed crop. It is widely distributed between 33°N and 30°S. It has the characteristics of long growth cycle, high yield, and large nutrient demand. China is the third largest producer of sucrose in the world. The area of ​​sugarcane planted is second only to Brazil and India. For a long time, sugarcane production has been one of the pillar industries in the sugarcane area. However, the current high input cost of fertilizers has severely restricted the international competition of my country's sugarcane industry. force. Application ranges of urea, superphosphate and potassium chloride for sugarcane are reported to be ...

Claims

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Application Information

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IPC IPC(8): A01C21/00
CPCA01C21/007
Inventor 吴启华敖俊华王庆李爽陈迪文黄莹
Owner 广东省科学院南繁种业研究所
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