Respond of plant growth and soil water-salt to different irrigation amounts in little thickness aeration zone in the hinterland of taklimakan desert

In order to clarify the influence of saline water irrigation to plant growth and distribution of soil water-salt, and providing theoretical basis for sustainable water supply of ecological construction in desert area, the data of soil water-salt and plant growth was observed at Tarim Desert Highway Shelter-forest Ecological Project No. 17 well. The law of soil water and salt spatial distribution was analyzed, and the responses of plant growth to 4 different irrigation amounts were studied by single element variance analysis. The results were as follows: the soil water content reaches or is close to saturation in layer of 100 similar to 120cm under the 420mm irrigation water condition; The soil water content reaches or is close to saturation in layer of 160 similar to 180cm under the 233.1mm irrigation water condition; The soil water content reaches or is close to saturation in layer of 180 similar to 200cm under the 285.6 mm irrigation water condition; The soil water content reaches or is close to saturation in layer of 160 similar to 180cm under the 201.6mm irrigation water condition. The vertical distribution law of soils salinity is that the soil salt can enter groundwater after 3 days of irrigation, and be gathered in 0 similar to 30cm soil layer. There were no significant differences except the Tamarix plant height in plant growth indexes among 4 different irrigation quantities treatments.