Controlling threshold in soil salinity when planting spring wheat and sequential cropping silage corn in Northern Xinjiang using drip irrigation  

作　　者：Zhenhua Wang Bo Zhou Lei Pei Jinzhu Zhang Xinlin He Henry Lin 

机构地区：[1]College of Water and Architectural Engineering,Shihezi University,Shihezi 832000,Xinjiang,China [2]Department of Ecosystem Science and Management,Pennsylvania State University,University Park,PA 16802,USA [3]College of Water Resources and Civil Engineering,China Agricultural University,Beijing 100083,China [4]College of Agricultural and Life Sciences,University of Wisconsin-Madison,Madison,WI 53706,USA

出　　处：《International Journal of Agricultural and Biological Engineering》2018年第2期108-114,共7页国际农业与生物工程学报（英文）

基　　金：support from the Natural Science Foundation of China(51169022);the National Key Technology Research and Development Program of the Ministry of Science and Technology of China(2015BAD20B03);the High-level Scientific Research of Shihezi University(RCZX201433).

摘　　要：Xinjiang Region of China is one of the most typical and representative arid areas worldwide,along with severe soil salinization issue.Planting spring wheat and sequential cropping silage corn in Northern Xinjiang using drip irrigation has become an effective way to relieve soil salinity stress,which improves the simple agricultural structure in the past and ensures food security in this area.However,neither the effects of different soil salinities on the growth and yield of spring wheat and silage corn,nor their desalination effect correspondingly was clear until now.Therefore,a pot experiment was conducted at Shihezi,Xinjiang from March to June 2015.The study aimed to establish the quantitative correlations between the parameters mentioned above and came up with the appropriate soil salinity threshold in Northern Xinjiang area.The results confirmed that the soils in all treatments were desalinated after the whole growth period,and the decreasing rates varied within 18.89%-44.08%and 11.06%-30.83%for two plants,which showed linear and quadratic correlations with initial soil salinity,respectively(R^(2)>0.92^(**),p<0.05).Meanwhile,higher soil salinity would inhibit crop growth and yield,and the initial soil salinity also represented the negative quadratic correlations with growth parameters(R^(2)>0.92^(**),p<0.01).The inhibition effect was enhanced with larger initial soil salinity.After the comprehensive consideration of soil salinity variation,crop growth and yield,the initial soil salinity was recommended under 8.91 g/kg and 5.54 g/kg to plant spring wheat and sequential cropping silage corn in Northern Xinjiang using drip irrigation.

关 键 词：soil salinity drip irrigation spring wheat sequential silage corn quantitative correlations critical controlling threshold 

分 类 号：S15[农业科学—土壤学]