Effects of Trichoderma Bio-organic Fertilizer on Salinized Soil Fertility and Yield and Quality of Hang Cabbage
In order to study the effects of bio-organic fertilizer on the chemical properties of saline soil and the growth of cultivated vegetables,a pot experiment and a field experiment were conducted with Hang cabbage as the test material.Four different concentrations of Trichoderma spore liquid were set up in the pot experiment to determine the aboveground dry weight,stem diameter,SPAD value and root growth index of Hang cabbage.The field experiment assessed the yield,nutrient and quality,soil properties,and enzyme activity of Hang cabbage using different organic fertilizers including Chinese medicine residue(OF),Chinese medicine residue+Trichoderma(BOF-1),Chinese medicine residue+Trichoderma(BOF-2),and chicken manure+Trichoderma(BOF-3).The results showed that dry weight,stem diameter,SPAD value and root growth index of Hang cabbage were significantly increased under the treatment of 106 CFU/g Trichoderma spore solution compared with control.In field experiments,compared with OF treatment,BOF-2 and BOF-3 treatments increased the yield of Hang cabbage,promoted the uptake of phosphorus and potassium nutrients,and reduced the nitrate content of Hang cabbage.And soil electrical conductivity and exchangeable sodium content were decreased,and soil phosphatase activity was increased.Spearman correlation and random forest analysis showed that soil phosphatase activity,pH and soil EC were important indicators affecting the yield of Hang cabbage.In conclusion,the application of Trichoderma bioorganic fertilizer(3.0 t/hm2)is an effective measure to improve the yield and quality of Hang cabbage.
saline soilbiological organic fertilizerHang cabbageyield and qualitysoil enzyme activity
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