Research On Soil Anti-scouribility And Soil Anti-erodibility Under Different Vegetation Restoration Measures In Soil Eroded Degradation Land

The different vegetation restoration measures of the southern red soil of low hilly land soil were selected as the research object.The change rule and influence factors of soil anti-erodibility and anti-scourability were studied by combining the statistics and indoor analysis under different vegetation restoration measures.In order to provide certain theoretical basis and technical reference on the southern red soil of low hilly land soil erosion prevention,targeted layout of soil and water conservation measures,protect cultivated land resources,the study has important significance on targeting layout soil and water conservation measures,and protecting cultivated land resources.The main conclusions are as follows:(1)The index of soil anti-erodibility under different vegetation restoration mea sures showed a gradual decrease with the increase of immersion time.The index of soil anti-erodibility under different vegetation restoration measures were M5>M 2>M3>M4>M1>CK1>CK2.The dynamic trend of the index of soil anti-erodibility can be better fitted with the quadratic function.The water conservation and soil c onservation of M5,M2,M3 vegetation restoration measures are better,and the soi lanti-erodibility is nice.(2)The soil anti-erodibility was mainly affected by the physical and chemical properties of the soil and Root characteristic parameters.The index of soil anti-erodibility under different vegetation restoration measures was positively correlated with soil porosity,total phosphorus content and total nitrogen content(P<0.05).The index of soil anti-erodibility was negatively correlated with soil bulk density and<0.25mm water-stable aggregates(P<0.05).(3)The runoff sediment displayed a significantly fluctuated declining until it t ends to stable with time increased.While the index of soil anti-scourability displa yed a significantly fluctuated increasing until it tends to stable with time increased.The index of soil anti-scourability under different vegetation restoration measures were M5>M2>M3>M4>M1>CKl>CK2.The dynamic trend of the index of soil an ti-scourability can be better fitted with the power function,and its R is between 0.620-0.954(P<0.05).(4)The index of soil anti-scourability was negatively correlated with soil bulk density and<0.25mm water-stable aggregates(P<0.01).The index of soil anti-sco urability was positively correlated with total soil porosity,total phosphorus content and instant phosphorus content(P<0.05).The index of soil anti-scourability displa yed a significantly declining with erosion quantity increased.Among essential char acteristic of root of different vegetation restoration measures,under the three flow rate,the index of soil anti-scouribility was correlated with diameter<lmm root length,root volume,root surface area(P<0.05).The index of soil anti-scouribility was positively correlated with diameter<1mm root length,root volume(P<0.01)Root surface>1mm area had a significant positive correlation at a flow rate of 3.5 L/min(P<0.05).The root of diameter<lmm was the main factor affecting the soil anti-scourability.