Corn high-yield water-saving irrigation method

A high-yielding, corn-based technology, applied in the agricultural field, can solve problems such as slow measurement speed, limited soil types, and difficulty in monitoring instantaneous soil moisture conditions, and achieve the goals of improving accuracy and precision, overcoming differences in water content, and quantifying irrigation techniques Effect

Active Publication Date: 2013-10-02
YANGZHOU UNIV
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Problems solved by technology

Guiding irrigation based on transpired water or using model simulation requires systematic expertise, and the method is complicated and difficult to apply in production
Using soil moisture content, percentage of field water holding capacity, etc. to measure soil moisture and serve as irrigation indicators, these methods have at least two shortcomings: one is that the measurement speed of these indicators is slow or the accuracy is poor (such as alcohol burning soil method, etc.), It is difficult to monitor the instantaneous soil moisture

Method used

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  • Corn high-yield water-saving irrigation method
  • Corn high-yield water-saving irrigation method
  • Corn high-yield water-saving irrigation method

Examples

Experimental program
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Effect test

Embodiment

[0035]In 2011-2012, clay, loam and sandy soils were selected in Yangzhou and Lianyungang respectively, and the maize variety Denghai 11 was planted, and the experiment of water-saving irrigation method for high-yield and high-yield corn with low-limit soil water potential control (referred to as high-yield water-saving irrigation method) was carried out. , with the local conventional irrigation method as the control. Except for the water management method, the high-yield water-saving irrigation method and the control are completely consistent in other cultivation measures, such as sowing density, fertilization period and amount, and pest control. The results showed that compared with the control (conventional irrigation method), the yield of the high-yield water-saving irrigation method increased by 7.2-9.8%, the amount of irrigation water decreased by 38-50%, and the water use efficiency [yield / (irrigation water + precipitation)] increased by 26%. ~39% (Table 3).

[0036] ...

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Abstract

The invention provides a high-yield water-saving irrigation method for controlling minimum soil water potential. The method includes the steps that minimum soil water potential indexes are determined by growth periods, and water supply amount is determined by soil types to make water supply be uniform with water required by growth and development of corn. By the adoption of the method, the defects that the soil water content is used as the irrigation index and the soil water content is different due to the fact that the soil types are different are overcome, and yield and water utilization efficiency are jointly improved.

Description

technical field [0001] The invention belongs to the field of agricultural technology and is used for high-yield and water-saving irrigation of corn, in particular to a method for irrigating corn by controlling the soil water potential of the lower limit. Background technique [0002] Corn is the main food crop in the world, and it is the food crop with the largest planting area and the highest total output in my country. Northern my country is the main producing area of ​​corn. In the south, corn is mostly grown in water-scarce areas or in poorly irrigated fields. The shortage of water resources is the most important factor limiting the increase of maize yield (Zhang Xiying, 2002; Peng Shizhang et al., 2004; Liu Zhandong et al., 2011). In order to save water resources, scientific workers have studied and applied corn water-saving irrigation technologies such as sprinkler irrigation, drip irrigation, alternate irrigation in different regions, and regulated deficit irrigatio...

Claims

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Application Information

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IPC IPC(8): A01G25/00A01G1/00
Inventor 杨建昌张耗王志琴
Owner YANGZHOU UNIV
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