不同土壤调理剂对酸化砂姜黑土质量及小麦生长和养分吸收的影响OA

Field experiments were conducted to study the effects of eight different soil conditioners(lime,commercial mineral-based soil conditioner and self-developed soil conditioners No.1-6)on the quality of acidified sandy ginger black soil,the growth and nutrient absorption of wheat(Triticum aestivum L.),in order to provide a basis for acidified soil remediation and soil conditioners creation.Using wheat as the test crop,nine treatments were set up:control(no soil conditioner application),lime,commercial mineral-based soil conditioner,soil conditioners No.1(glauber's salt+manure),No.2(plant ash+manure),No.3(plant ash+manure+potassium fulvate+microbial inoculum+synergist),No.4(silicon-rich clay mineral+humic acid organic fertilizer+microbial inoculum),No.5(silicon-rich clay mineral+biochar+seaweed organic fertilizer),No.6(silicon-rich clay mineral+biochar+humic acid organic fertilizer).The differences among different treatments in population dynamics,photosynthetic characteristics,yield and composition factors,nutrient absorption of wheat and soil physicochemical properties after harvest were analyzed.The results showed that,compared with the control without the application of soil conditioners,except for the lime treatment,tiller number at the maturity stage and spike formation rate of wheat under the treatments of other soil conditioners were increased by 5.7％—30.7％and 30.0％—82.7％,respectively.The application of different soil conditioners increased the net photosynthetic rate,yield,and nitrogen accumulation of wheat at the flowering stage by 5.4％—68.6％,19.6％—69.0％and 38.1％—120.7％,respectively,with relatively larger increasing temperature of soil conditioners No.1 and No.4,especially the latter,which also led to a significant increase in phosphorus and potassium accumulation.After wheat harvest,the soil pH value under the treatments of soil conditioners No.4,5,6 were raised by 0.36,0.55,1.15,respectively,and available potassium contents were increased by 14.4％,34.3％,45.4％,but alkalized-nitrogen content reduced.Soil moisture contents in the soil layer of 0-20 cm and 20-40 cm treated with lime were increased by 45.3％and 36.1％,respectively,and water use efficiency(WUE)of wheat at the flowering stage was raised by 44.8％.Soil conditioner No.1 significantly reduced the soil moisture content of the 0-40 cm soil layer and WUE of wheat at the regreening stage,but raised soil pH value slightly.In summary,under the conditions of this experiment,the application of soil conditioners No.1,4,5 had relatively good effects on increasing yield and improving soil quality,and they were recommended to use in the improvement of acidified sandy ginger black soil in southern Henan and the creation of new products.