A kind of greening method of coastal saline-alkali land in South China

Abstract

The invention discloses a method for greening coast saline and alkaline land in South China. According to the method, combining planting is carried out according to the biological characteristics of pongamia pinnata and sporobolus virginicus to form stable phytocoenosium free of plant diseases and insect pests. Pongamia pinnata seedlings of 1.5 to 2 years old are screened out, sporobolus virginicus seeds are soaked with 0.1% KNO3 for 24 hours for bud forcing treatment, and the seedlings are placed in matrix soil for remarkably promoting growth of the two kinds of plants to be cultivated. Then, planting holes are dug, pongamia pinnata matrix bag seedlings are planted, matrix soil mixed with the sporobolus virginicus seeds is spread, and watering and maintenance are carried out. The sporobolus virginicus seeds sprout and root within 2 weeks after planting, and the germination rate is 90% or above. After one month, the pongamia pinnata can be planted, the leaves of the sporobolus virginicus are bright green, growth starts to spread, a very good greening effect is achieved one year later, and management is extensive.

Description

technical field [0001] The invention belongs to the field of ecological restoration of coastal saline-alkali land, and specifically relates to a greening method of coastal saline-alkali land in South China. Background technique [0002] South China includes Guangdong, Guangxi, Hainan, Hong Kong, Macao and Taiwan, and the South China Sea Islands. The coastline is long, the phreatic water level in the coastal area is shallow, the mineralization is high, the surface is easily returned to salt, and the ecosystem is fragile. Coastal areas such as ports, docks, and resorts are constantly being developed, and often face the work of windbreak, sand fixation, and vegetation reconstruction. However, soil salinization and low vegetation coverage have become the bottleneck of coastal environment construction. Studies have shown that biological measures are the best way to develop and utilize saline-alkali land. However, at present, most of the shelterbelts planted along the coast of S...

AI Technical Summary

Problems solved by technology

However, at present, most of the shelterbelts planted along the coast of South China are casuarinas, Taiwan acacia and other plants, with a single species, serious pests and diseases, and serious degradation problems