Salt-resistant type terrace planting method for seaside salt wasteland

Abstract

The invention relates to a salt-resistant type terrace planting method for a seaside salt wasteland. The method comprises dividing the seaside salt wasteland of natural state into a deep trench, a terrace and a shallow trench; laying two flexible waterproof isolating layer on the terrace and the shallow trench; placing soil shoveled by a ditcher from the deep trench on the waterproof isolating layer; building ridges at the periphery of the terrace and flattening land between the ridges; leaching salt by irrigating the terrace with fresh water or by storing summer natural rainfall ; slaking and fertilizing immature soil of the terrace; covering mulch film; and planting crops. After salt leaching, the salinity of the soil of the seaside solonchak treated by the method could be rapidly reduced to below 0.2%. The immature soil, after the slaking and fertilizing, could be used to plant crops such as cotton, vegetables, grapes, wheat, corn, etc. Further, when cultivating measures such as the mulch film covering and the formula fertilizing are combined in usage, output of the seasonal crop can reach middle yield level.

Description

technical field [0001] The invention relates to an engineering improvement method of saline soil, in particular to a method for planting a salt-resistance platform in coastal salt barren land. It belongs to the technical field of ecological agriculture. Background technique [0002] The distribution of saline-alkali soil in my country is very extensive. According to the statistics of the second national soil census "China Soil Census Data", my country has a total of 31.72 million mu of coastal saline soil, of which 25.8 million mu of non-cultivated coastal saline soil occupies 81.34%. These coastal saline soils are widely distributed in the coastline of about 3000km in eastern my country, including Shandong, Jiangsu, Liaoning, Hebei, Tianjin and other provinces (cities). As the Yellow River estuary moves further eastward, the area of ​​coastal saline soil is gradually increasing. [0003] The agricultural planting and utilization of coastal salt wasteland has the following...

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Problems solved by technology

Second, the groundwater has a high degree of mineralization and a shallow buried depth. The groundwater is mostly salt water, which cannot be used for agricultural irrigation and drinking water for humans and animals. The buried depth is generally more than 2m.

Fourth, there is a lack of fresh water resources, and external surface water cannot meet the demand. At the same time, natural rainfall is too concentrated. More than 70% of the annual rainfall is concentrated in summer, resulting in drought and water shortage in spring and autumn.

However, in production practice, because the height of the terrace and the depth of the pond water cannot be considered mutually, it often happens that the pond water is too small to meet the breeding standards, and the salt in the pond water climbs to the upper part of the terrace along with the water, which endangers the growth of crops.

So far, there are few effective improvement methods for coastal salt wasteland, and a large area of ​​coastal saline soil is still in the state of wasteland

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