半干旱黄土丘陵区不同植被恢复方式下土壤理化特性及相关分析

用野外调查和室内分析相结合的方法,分析了半干旱黄土丘陵区典型区域-彭阳中庄示范区不同植被恢复方式下的土壤水分、土壤容重和土壤养分变化特征.结果表明:自然恢复方式下的土壤含水量大于自然+人工恢复方式下的土壤含水量,并且两者都小于对照坡耕地的土壤含水量;0～100 cm土层,自然恢复的土壤容重明显小于人工+自然和坡耕地的土壤容重,土壤孔隙度也是自然恢复最大,人工+自然恢复的相对较小,坡耕地最小;0～60 cm土层,土壤养分平均含量变化全氮和碱解氮含量自然>坡耕地>人工+自然;全磷和速效磷含量坡耕地>自然>人工+自然,全钾和速效钾含量自然>坡耕地>人工+自然,且差异不显著,有机质含量自然>坡耕地>人工+自然,且差异很显著.

Soil Physical-chemistry Characteristic and Correlation Analysis of Different Vegetation Restoration Modes in Semiarid Hilly and Gully Region

Choosing the typical model district of small watershed of Zhongzhuang Pengyang in semi-arid loess hilly and gully region,by the combination of field investigation and laboratory analysis,studied the soil moisture,soil bulk and soil nutrient characteristics in different vegetation restoration modes.The results showed:the soil moisture of the natural restoration is larger than that of artificial+natural restoration,and both are smaller than the control of the slope farmland soil moisture;0~100 cm,the bulk density of the natural recovery is the smallest.the soil porosity is the largest,sloping land is minimum;the average content of soil nutrient in 0~60 cm,total nitrogen and readily available nitrogen content:natural>sloping land>artificial+natural;total phosphorus and readily available phosphorus content:sloping land>natural>artificial+natural,total potassium and readily available potassium content:natural>sloping land>+artificial nature,and the difference was not significant,organic matter content:natural>sloping land>artificial+natural,and the difference was very significant.