Effect Of Different Basal Fertilizer Treatments On Agronomic Traits And Soil Physicochemical Properties Of Greenhouse Tomatoes

Tomato(Solanum lycopersicum L.)is rich in a large number of nutrients and is one of the important fruits and vegetables in China.Daylight greenhouses are an important part of facility agriculture in China,and they are widely used in China because of their water-saving,high-yielding and high-efficiency characteristics.In this study,tomatoes grown in daylight greenhouses were used as the research object,and a field plot trial was conducted in the greenhouse by applying three base fertilizer treatments of bone calcium organic fertilizer(A),bone mud organic fertilizer(B)and bio-organic fertilizer(C)and one control group without fertilizer(CK),and setting fertilizer application rates of 500 kg/mu,1000 kg/mu,2000 kg/mu and 3000 kg/mu,for a total of 13 treatments.We systematically investigated the effects of different fertilizer treatments on tomato growth and development,soil physical and chemical properties,yield quality and nutrient uptake and utilization,so as to promote chemical fertilizer reduction and efficiency,promote the development and application of new bio-organic fertilizers,achieve high quality and high yield of tomato in facilities,and provide theoretical reference and technical support for improving its economic benefits and greenhouse greenhouse tomato cultivation in Hohhot,Inner Mongolia.The main findings of this study are as follows:(1)The addition of organic fertilizer could significantly affect the growth of tomato,and its plant height and stem thickness increased with the increase of fertilizer application,and it could significantly improve the photosynthetic characteristics of tomato leaves at different growth periods.At the same fertilizer concentration,bio-organic fertilizer(C)had the best effect,while the application of calcium bone organic fertilizer(A)had the second best effect.(2)The application of organic fertilizer significantly improved the soil organic matter content,total nitrogen content,effective phosphorus content and fast-acting potassium content,and improved the soil nutrient status.Organic fertilizer can effectively regulate soil p H,which decreases with the increase of fertilizer application in this area.At the same fertilizer application concentration,its effect on soil improvement was: bio-organic fertilizer(C)> bone calcium organic fertilizer(A)> bone mud organic fertilizer(B).(3)Application of organic fertilizer effectively increased bacterial diversity and abundance in the soil,and the abundance of metabolism(Metabolism)function-related flora was highest in this region.The ranking of soil microbial diversity after fertilizer application treatment was: bio-organic fertilizer(C)> bone calcium organic fertilizer(A)> bone mud organic fertilizer(B).(4)The addition of organic fertilizers significantly increased the yield and sugar content of greenhouse tomatoes,achieving the effect of increasing yield and improving quality.Among them,bio-organic fertilizer(C)had the best effect on yield and sugar content per plant,with C3000 increasing yield per plant by 40.82% and average sugar content by 38.77% compared to the control(CK).Therefore,the best fertilizer application rate was selected as 3000 kg/mu.(5)When growing tomatoes in greenhouse greenhouses in Hohhot,Inner Mongolia,the best fertilizer application was 3000 kg/mu of bio-organic fertilizer(C),which yielded 8.21 kg per plant and 7.23% brix,followed by 2000 kg/mu of bio-organic fertilizer(C),3000 kg/mu of bone calcium organic fertilizer(A)and 3000 kg/mu of bone mud organic fertilizer(B).