Study On The Plant Compatibility And Biological Properties Of Planting Concrete

Based on a large number of experiment study and theoretical analysis,a comprehensive application of chemistry,biology,plant physiology,ecology and so on,a system of the physical and chemical properties of planting concrete were discussed.The plant compatibility and Biological Properties of Planting Concrete were detected and analyzed.The main findings are as follows:1.Through analysis of the research results,composing mechanism,structural features and physicochemical properties of the "Shaqima" planting concrete are discussed,and found that its stress-strain curves have multiple peaks jump,which shows that the contact tension at bonding points between thick material contacts is the key factor to determine the strength of the planting concrete.It also indicates that the strength of the concrete cement consumption is also the key factor to determine the strength of the planting concrete,and "Shaqima" has the merits of trampling resistance capability of plants.The paper pointed out how to solve the paradox between cement and plant compatibility is the important issue to study planting concrete.Also,the principle of rough kind option of planting concrete is explained and listed some kinds of grasses which are suitable for subtropical2.By orthogonal experiments,the influence of various factors such as cement,ploughed earth,pearlite,and sur-medicinal preparation on the pH value of light-weight planting concrete has been discussed.The results indicate that these factors have clear time effects.The pH value was showed a largest reduction over 28 d.The influence of cement,pearlite and sur-medicinal preparation reached a remarkable level in less than 7 d.After 28 d cement a major factor in the pH value and the 28 d compressive strength,showing a linear relation,and then tended stable,and with an increase of pearlite the pH value began to drop.After the 28 d synthesis,A₁B₁C₂D₃,which means 4.5 kg of cementl,17.3 kg ploughed earth,2.9 kg.of sur-medicinal preparation,2.9 kg.of sur-medicin,7.2 kg.of pearlite became the best combination.Appropriate proportion of the factors should be chosen in practical applications.3.By orthogonal experiments,the influence of three factors of phosphate cement,portland cement and ploughed earth on the PH value of light-weight planting concrete has been discussed. Phosphate cement and portlang cement at 2:1 ratio can be improved the quality of light-weight planting concrete of the eary srength and intensity,and the influence of the PH value of light-weight concrete caused by phosphate cement is minimum;the best combination of phosphate cement,portland cement and ploighed earth is A2B3C2.which means 0.05 kg of phosphate cement, 0.025 kg of portland cement,0.7 kg.of ploughed earth. 4.Orthogonal experiment was conducted to investigate the effects of cultivated soil,organic fertilizer,additional materials on major fertility indices such as organic matter;content of rapidly available N,P,K and 180 days' pH value of light-weight planting concrete.The effects of organic fertility on organic matter,rapidly available N and P were extremely significant,its effect on rapidly available K was significant.The effect of cultivated soil on organic matter was extremely significant,its effects on rapidly available N and K were significant,while its effect on rapidly available P was insignificant.The effect of additional materials on fertility indices was insignificant.There was no significant effect of those factors on 180 days' pH value.The optimized comprehensive level combination was A₃B₃C₃.which means 24.2 kg of cultivated soil,3.5 kg of organic fertilizer,0.7 kg.of additional materials.The test on major physical characteristics and red darnel growth quality proved the excellent plant compatibility of optimized combination.5.To search for the correlation between planting concrete enzyme activities and fertility under the long—term fertilization conditions.The results were as follows:Long—term application Of NPK fertilizers combined with organic manure could significantly increase the contents of organic matter,both of total N,P and available N,P,K.Similarly,the planting concrete phosphatase,urease and invertase activities were increased.Returning Of COrn straw intofield was helpful to increase planting concrete invertase activity mainly.Farm yard manure laid particular emphasis on the augment of soil phosphatase,urease activities,increase planting concrete fertility.The correlation between planting concrete enzyme activity and planting concrete nutrient content was significant.Pos—itive correlation was found between the activities of phosphatase,urease and invertase and the contents of organicmatter,total P and available P.In addition,the positive correlation Of phosphatase activity with the contents Ofavailable K and alkalifled N,urease activity with the content of available K,invertase activity with the contentof alkalified N,were significant.