Effects Of Different Tillage Measures On Soil Fertility And Maize Bearing Capacity Were Analyzed

Soil fertility is the comprehensive reflection of the nature of physics,chemistry,biology,etc,to make crops grow well,the soil system must be in state of mutual coordination,it mainly depends on the farming cultivation management measures u nder different cropping systems and good management measures can provide needed for crop output of physical and chemical properties such as water,fertilizer,gas a nd heat.To explore suitable planting density different soil fertility in Inner Mongoli a area,this study adopts the peasant household light spin(FR,contrast),no-till retu uing cover(NTR),no-till stubble(NT),pushing qing twenty-nine-inch rows deep s crew(SCR),deep spin straw returned(SC),the commune total quantity(DPR),the commune(DP),pine rake mix mix(SSR),deep loosening(SS)nine different farm ing methods,set up five density gradient(82500 plants/hm2,90000 plants/hm2,97500 plants/hm2,105000 plants/hm2,112500 plants/hm2),From the perspective of physi cal,chemical and biological characteristics of soil,the mechanism of soil fertility i mprovement of 8 tillage measures was systematically analyzed and expounded.On t his basis,through the cultivation measures of corn plant canopy morphology and ph otosynthetic physiological characteristics,yield and yield components of index chang ing with the planting density increase and the analysis of the relationship between t he proven corn under different soil fertility levels of suitable planting density,for d ifferent soil fertility in Inner Mongolia region adopt suitable planting density to incr ease close to provide theoretical basis to increase production.The main research res ults are as follows.(1)Different tillage measures have different effects on soil indexes,resulting in different soil fertility improvement effects.Among them,SSR and DPR significantl y increased the soil porosity,increased the soil water content and decreased the soi l bulk density in the 0-45 cm soil layer compared with FR,effectively regulated the relationship between soil solid,liquid and gas,and brought the soil R value closer to the ideal state.The contents of available potassium,available phosphorus and c ation exchange in soil were increased by 12.64%,28.54%,127.02%and 130.9%,re spectively.The soil enzyme activity and the number of bacteria and fungi were im proved,and DPR could significantly increase the soil organic matter content and th e number of actinomycetes compared with other treatments.(2)Soil fertility of FR decreased year by year.The soil fertility of all tillage methods and straw mulching methods was higher than that of household shallow ro tation(FR),and the straw mulching methods such as SCR,SSR,DPR and NTR w ere higher than that of tillage methods(SC,SS,DP and NT).DPR>SSR>DP>NT R>SS>SCR>SC>NT>FR and DPR>SSR>SCR>SS>NTR>SC>NT>FR in 2018 and 2019,respectively.The soil fertility of DPR was the highest,followed by SSR,and t he soil fertility indexes were 0.783,0.808 and 0.639,0.755,respectively.(3)The actual planting of SC,SS,NT,DP,SCR,SSR,DPR and NTR increased by 0.92,0.66,0.96,0.39,0.79,0.67,1.49 and 0.47 thousand plants/hm2 when the maximum yield was reached,and the yield increased by 1.4,2.17,3.32,1.03,2.78,1.32,4.24 and 1.46t/hm2.The maximum actual planting density and yield increased with the increase of soil fertility.For every 1%increase in soil fertility,the actual planting density could increase by 210 thousand plants/hm2.