Research progress of improvement and utilization of saline and alkali soil.

Abstract

Because of its characteristics such as high pH value，high-salt content，poor structure and low fertility，saline and alkali soil has harmful effect on both plant growth and eco-environment. Therefore，it is important to improve and utilize the saline and alkali soil. According to the relevant research in China and abroad，this paper reviewed the main causes of the saline and alkali soil，including soil parent material，texture，landform，neotectonics，hydrological condition，human activities，and analyzed biotechnologies such as germplasm screening，distant hybridization and genetic engineering as well as non-biological technologies including tillage fertilization，covering technique，hydraulic measures，chemical measures and electro-magnetic methods. And suggestions are raised，namely further improving regional salt forecast system and giving play to plant-microorganism combined bioremediation for the soil.［Ch，52 ref.］