Mechanical Force Processing Of Nonmetallic Minerals And Application In Soil Conditioner

With the development of society,the soil environment problem has been gradually being concerned,and it is urgent to maintain and improve the soil.At present,soil conditioner has been widely used to improve degraded soil,but there are more types of soil conditioner on the market.The research work of mineral conditioner is less.In this paper,for acidity,salinization and soil orchard improvement,selection apatite,dolomite,zeolite,oyster shells and other natural minerals,the mineral powder activated by a microcrystalline mill were used to study their physical-chemical properties and dissolution kinetics of mineral elements.Then,using pot experiment to verify the effect of soil improvement.The results were as follows:(1)Microcrystalline grinding improved the physical properties of the insoluble powders for a certain time.It appeared that mall particle size,high specific surface areas,and rough surface morphology.Different solid content tests showed that the grinding efficiency was high when it was 65%.By elemental leaching rate test,phosphorite powder of citrate acid soluble phosphorus increased 77.99%.When the solid content was 55%,the calcium release of dolomite increased 67.02% compared the rude rocks,the magnesium release rate in 60% is higher,were significantly increased 53.00% at 210 minute.(2)Improvement in acidic red soil improved test results show that the useof conditionder can improve the acidic soil p H,reduce soil exchangeable Al content,improve soil exchangeable(Ca,Mg)content.The ultrafine dolomite processing to reduce soil exchangeable Al,increase the exchange of calcium and exchange of magnesium effect is remarkable.In ultrafine oyster shell processing,the exchangeable(Ca,Mg)increased by 97.55%and 45.80%.In the plant growth effect:Organic fertilizer and phosphate rock treatment effect is the most significant,the corn plant height,chlorophyll and root cap ratio increased by 99.16%,19.49%and 49.06%respectively as compared with the control treatment.The phosphate rock and dolomite exhibit good complementarity can meet phosphorus elements required for plant growth,while avoiding the toxic effect of active acid on plant,good effect of acidic red soil.(3)Improvement in saline-alkali soil improved test results show that:application of soil conditioner can reduce the amount of soil soluble salts.Zeolite and fertilizer processing has better results;Effect on plant growth were as follows:PR4 chlorophyll content is high,and increased 12.82%compared with the control,followed by ultra-fine processing Bentonite PT1.The PR4 processing of corn seedling dry weight increased 22.12%of the control process.(4)The orchard soil improvement results show that:mineral fertilizer can improve the quality of apples,increased the fruit weight and sugar-acid ratio;on the quality of fruit grown,the increased chlorophyll content improve the efficiency of photosynthesis,and promote plant growth;soil available nutrient content in the mineral fertilizer treatment process are improved compared with the blank.Since mineral fertilizer elements is slow-release,long-term use can improve plant growth environment,improve soil physical and chemical state of the soil rich mineral elements,and phosphate resources rich in iron,calcium,magnesium and other elements.Further research is the impact of these elements on plant growth after microcrystallization treatment.