宁夏不同土壤类型日光温室土壤理化性质的变化特点

根据宁夏温室的分布状况,按照土壤类型(灌淤土、黑垆土、灰钙土)分别采集了不同层次温室土壤,分析了土壤理化性质的变化特点。结果表明,灰钙土、灌淤土的容重较大,而黑垆土的容重较小;土壤孔隙度、有机质、全氮、硝态氮、全磷、速效磷、速效钾、缓效钾均表现为黑垆土>灌淤土>灰钙土;全盐量的高低依次为灌淤土>灰钙土>黑垆土;黑垆土、灰钙土的pH值较高,而灌淤土较低;碱解氮的高低依次为灌淤土、黑垆土>灰钙土。多重比较结果表明,土壤全盐、pH值、有机质、全磷、缓效钾在3类土壤间差异显著。

Variability of Physical and Chemical Properties of the Greenhouse Soil in Different Soil Types of Ningxia

Based on distributing locations of the greenhouse of Ningxia,the soil samples in diffe-rent layers(0-15cm,15-30cm,30-60cm) were collected by means of random sampling for both the different greenhouses and soil types(irrigating silt soil,Heilu soil,semiarid).The changes features of physical and chemical properties in the tested soils were analyzed.The results showed that soil bulk density of semiarid and irrigating silt soil was higher than that of Heilu soil from 0 to 60 cm.The order of soil porosity,organic matter,total N,nitrate N,total P,available P,readily available K and slow-release K from 0 to 60cm in three types soil were: Heilu soil>irrigating silt soil>semiarid,for total salt,irrigating silt soil>semiarid>Heilu soil,and for pH,Heilu soil,semiarid>irrigating silt soil.The order of alkali-hydrolyzable N content was irrigating silt soil equal Heilu soil>semiarid.There were 1% or 5% level of significant differences between different soil types and different depths at soil bulk density,soil porosity,total salt,pH,content of organic matter,nitrogen,phosphorus,potassium.