银川平原草甸湿地土壤养分特征与植物响应

doi:10.13866/j.azr.2019.04.04

Abstract

Abstract: In this study,three types of meadow wetlands (marsh meadows,typical meadows and salty meadows) in the Yinchuan Plain were selected as the research subjects.An analysis of soil nutrients and plant nutrients was conducted with classical statistical methods through field investigation and laboratory analysis.The main conclusions are as follows:① At the horizontal gradient,except for soil total phosphorus (TP),the difference of soil nutrient level in soil layer of 0-20 cm in depth among the three meadow wetlands was obvious (P<0.05).② The vertical variation of soil total nitrogen (TN) and soil alkali-hydrolyzed nitrogen (AN) in the salty meadow was not obvious (P>0.05),but the vertical fluctuation in the typical meadow and swamp meadow was larger.The vertical change of TP in meadow wetland soil was not obvious (P>0.05).An enrichment of soil available phosphorus (AP) and available potassium (AK) occurred in topsoil in the meadow wetland to a certain extent,and the vertical change was very obvious (P<0.05).③ The change trends of C,N and P contents in soil were consistent.There was a significant correlation between soil AK content and soil P content (P<0.05).④ Plant nutrients in the meadow wetland was affected by N,in which the C∶N and C∶P were negatively correlated with soil nutrients,and plant N∶P was significantly affected by soil organic carbon(SOC) and AN.

Key words: meadow wetland, soil nutrient, plant nutrient, Yinchuan Plain

SU Zhi-tun, WU Chun-yan, HE Tong-hui, QIAO Bin, FENG Yan-qiong, WANG Xiao-ping. Soil Nutrient Characteristics and Plant Response in Meadow Wetland in the Yinchuan Plain[J].Arid Zone Research, 2019, 36(4): 816-823.

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Soil Nutrient Characteristics and Plant Response in Meadow Wetland in the Yinchuan Plain

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