Root-division alternative irrigation method using brackish water and fresh water and application thereof in saline-alkali land for planting goldenrain tree

Abstract

The invention provides a root-division alternative irrigation method using brackish water and fresh water. The root-division alternative irrigation method comprises the following steps of paving of a salt isolation layer, and root-division alternative irrigation, wherein the root-division alternative irrigation comprises early irrigation and later irrigation; in the process of paving of the salt isolation layer, the salt isolation layer comprises a crude stone layer, a silvergrass stalk layer, a fine stone layer and a soil layer; the crude stone layer comprises ceramic particles, vermiculite and cobblestones; the fine stone layer comprises wheat bran, and desulfurizing waste; the soil layer comprises turfy soil and volcanic ash. The invention also provides an application of the root-division alternative irrigation method using brackish water and fresh water in a saline-alkali land for planting goldenrain tree. The root-division alternative irrigation method has the advantages that the consumption of the fresh water is greatly reduced, and is reduced by 70%-80% in comparison with the usage of fresh water of common irrigation type; the water utilization rate of the irrigation water is increased to be 90% or more; when the plant is planted by the method, the content of nutrients in the fruit is increased, and the edible property is high; the defects of salt accumulation and returning in the soil root layer of the planting area are greatly limited.

Description

technical field [0001] The invention belongs to the technical field of irrigation, and in particular relates to a root-split alternate irrigation method using brackish water and fresh water and its application for planting eucalyptus in saline-alkali land. Background technique [0002] According to statistics, China's underground brackish water resources are about 20 billion cubic meters per year, of which 13 billion cubic meters can be exploited, and most of them exist at 10-100 m underground, which is suitable for exploitation and utilization. Therefore, the development and utilization of brackish water resources can improve the utilization rate of water resources, ensure the sustainable development of water resources, and effectively alleviate the shortage of water resources in our country. [0003] my country's per capita water resources are 2,400 cubic meters, about 1 / 4 of the world's per capita, ranking 121st in the world, and listed as one of the 13 most water-deficie...

AI Technical Summary

Problems solved by technology

[0006] 1. In the existing irrigation method, only fresh water is used for irrigation water, resulting in a large amount of fresh water, and at the same time, the water utilization rate of irrigation water is low, and the waste of fresh water resources is serious;

[0007] 2. Plants grown by existing irrigation methods have low economic value;

[0008] 3. Plants grown by existing irrigation methods have low medicinal value

[0009] In summary, there are obviously inconveniences and defects in the actual use of the existing technology, so it is necessary to improve

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