Study On The Application Effect Of Plant-Based Sand Fixing Agents On Sandy Farmland

Plant based sand fixing agents are environmentally friendly sand fixing agents mainly composed of plant material extracts,and no toxic ingredients are added during the preparation process.The use of such sand fixing agents can effectively avoid soil pollution problems.To investigate the feasibility of its application in sandy farmland,three plant-based sand fixing agents(Robinia pseudoacacia type,flax type,and sunflower type)were selected in this study,and six spraying treatments were conducted on their consolidation layer compression resistance,wind erosion resistance,water retention,seed germination,and seedling growth.A comparative study was conducted using the same amount of clean water as CK,aiming to provide a theoretical basis for the development and application of plant resource based sand fixing agents,Provide reference for soil wind erosion control technology.The research results are as follows:(1)All three plant-based sand fixing agents can form a consolidation layer with a thickness of 1-14mm on the surface of sandy soil,and the consolidation layer has strong compressive strength.The compressive strength of the consolidation layer formed by locust type,flax type,and sunflower type sand fixing agents is 215.41%,154.94%,and77.93%higher than CK.And as the amount of sand fixing agent increases,the compressive strength of the consolidation layer significantly increases,with the strongest compressive strength of the locust type sand fixing agent.(2)The consolidated layer has strong wind erosion resistance,and the wind erosion resistance significantly increases with the amount of sand fixing agent used.At a dosage of 5 g/m~2,soil wind erosion was reduced by 65.92%,58.33%,and 69.55%in the treatment of locust type,flax type,and sunflower type sand fixing agents compared to CK,respectively.Field verification found that after spraying three sand fixing agents,the surface sediment transport significantly decreased by 52.53%,95.29%,and 92.82%compared to the non spraying area.(3)The consolidation layer has a certain inhibitory effect on soil evaporation.Compared with the locust type,flax type,and sunflower type sand fixing agents,the sunflower type sand fixing agent has a significantly better water retention effect than the locust type and flax type sand fixing agents.The Rose model was used to simulate the process of soil moisture evaporation,and soil evaporation showed three significant stages of change.The fitting coefficient R~2of the Rose empirical model was above 0.95.(4)Robinia type and flax type sand fixing agents have a promoting effect on the germination and growth of wheat seeds,but sunflower type sand fixing agents have an inhibitory effect,and the inhibitory effect increases with the increase of dosage.When the dosage is 3 g/m~2,the seed germination is significantly inhibited,and the germination rate is reduced by 62.50%compared to CK.When the dosage is 4 g/m~2,the root sprouting is significantly inhibited,and the sprouting number is reduced by 31.32%compared to CK.When the dosage is 2 g/m~2,The growth of bud length was significantly inhibited,reduced by 31.90%compared to CK;(5)The consolidation layer has a certain impact on the top breaking of seedlings,with Robinia pseudoacacia type sand fixing agent having the greatest impact.When the dosage reaches 5 g/m~2,the emergence rate of wheat and alfalfa significantly decreases by10.54%and 3.90%compared to CK.However,after the seedlings break the consolidation layer,all three sand fixing agents have a certain promoting effect on the growth of wheat and alfalfa plants.After spraying different dosages of Robinia pseudoacacia type sand fixing agent,the height of alfalfa plants increases by 23.32%,3.16%,12.65%,37.55%compared to CK 42.29%and 18.58%.