碱茅营养元素吸收量与土壤含盐量的相关分析

碱茅(Puccinellia distans(L·)Parl.)是广大盐碱土地区发展人工草场的优良草种。本文用硫酸盐盐土不同含盐量对碱茅吸收营养元素量进行相关分析表明,碱茅对N、P、K、Na元素的吸收量和土壤中含盐量呈直线相关,r=0.982,0.898,0.968,0.969。对Ca的吸收量和土壤含盐量呈负相关,r=O.996。对Mg的吸收量变动很小,和土壤含盐量没有明显相关性。

Correlation Analyses Between Nutrient Uptakes by Fiestucc sinensis Keng and Soil Salt Contents

Fiestuca sinensis Keng (Puecinellia distans(L.)Parl.)is a good kind of grasses to develop man-planted pasture land in saline-alkali soil regions. Correlation analyses were carried out in this paper about the uptake amounts of nutrients by the Fiestuca sinensis keng and the salt contents in soils. It was found that there were linear positive correlations between the uptake amounts of N, P, K and Na and soil salt contents, for which the correlation coefficients were0.982, 0.898, 0.968 and 0.969 respectively, and there was a negative correlation between the uptake amounts of Ca and the soil salt contents, for which r=-0.996, but for Mg no significant correlation was found.