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近年来，保护地的发展日新月异，各种栽培技术层出不穷，一些老温室的改良迫在眉睫，本文所述的是对耕层进行改良的无土栽培方法。１现阶段温室耕层所存在的问题乌海地区属草原土壤向荒漠土壤过渡区，土壤类型以棕钙土、灰钙土、漠钙土、淡钙土为主，只有靠近黄河两岸为淤灌土
In recent years, the development of protected areas is changing with each passing day, and various cultivation techniques emerge in an endless stream. The improvement of some old greenhouses is imminent. In this paper, soilless cultivation methods for improving topsoil are described. 1 Current Problems in Greenhouse Tillage Wuhai is a transitional region of grassland soil to desert soil. The soil types are mainly composed of calcareous soil, calcareous soil, calcareous soil and calcareous soil. Only the two banks close to the Yellow River are silt irrigation earth