Method for planting poplar trees in coastal saline-alkali soil

Abstract

The invention relates to a method for planting poplar trees in coastal saline-alkali soil, which comprises the following steps of: filling earth; digging and processing plant pits; improving earth for refilling the plant pits; selecting quality of tree stock; planting; building a cofferdam; and watering and nursing, wherein in the step of filling the earth, the whole or local terrain is lifted, and the highest underground water level is controlled to be below 1.5m; in the step of digging and processing the plant pits, the plant pits in large specification are dug, and a salt isolating and water pouring layer with the thickness of 0.1 to 0.3m is laid at the bottom of each plant pit; and in the step of improving the earth for refilling the plant pits, the salt content of the earth for refilling the plant pits is less than 0.5 percent, the pH is between 6.5 and 8.5, and the soil is powdery or granular and is mixed with a soil structure improver and an organic fertilizer. The method has the advantages of high operability and low implementation cost, and can effectively prevent the earth in the plant pits from returning salt, being alkalified and accumulating salt. Demonstration application proves that the survival rate of the planted polar trees is over 95 percent; moreover, the poplar trees grow vigorously and have a few plant diseases and insect pests in a later period, and have good landscape greening ecological effect.

Description

technical field [0001] The invention relates to a method for planting poplars, in particular to a method for planting poplars in coastal saline-alkali land. Background technique [0002] Coastal saline-alkali areas have the characteristics of high soil salinity, short soil formation time, poor nutrients, complex profile layers, and large changes in soil texture and structure; high groundwater level and high salinity; low terrain and poor natural drainage. Conventional poplar planting techniques generally show that the survival rate of poplar planting is low, and even if it survives, it grows slowly and has poor growth potential, and is susceptible to pests and diseases, especially poplar rot, which seriously affects the ecological effect and investment benefits of greening landscapes. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, aiming at the natural environment conditions and soil characteristics...

AI Technical Summary

Problems solved by technology

Conventional poplar planting technology usually shows that the survival rate of poplar planting is low, and even if it survives, it grows slowly and has poor growth potential. It is easy to suffer from diseases and insect pests, especially poplar rot, which seriously affects the ecological effect and investment benefits of greening landscape.