Research on the effects of combined application of biochar and trichoderma viridis on nutrient absorption and photosynthetic characteristics in cucumbers
Cucumber is a vital greenhouse vegetable crop,extensively cultivated across the globe.However,its cultivation is often hindered by continuous cropping challenges,which impose multiple constraints on growth,particularly in terms of soil nutrients,water availability,and sunlight exposure.Biochar,a recognized soil amendment,holds potential for boosting vegetable crop yields.Yet,the specific effects of combining biochar with Trichoderma viridis on the photosynthetic properties and nutrient dynamics in cucumber plants remain insufficiently understood.This study aims to elucidate the influence of biochar and Trichoderma viridis co-application on cucumber photosynthesis and nutrient absorption.By assessing the plant uptake of key nutrients such as nitrogen and phosphorus,alongside leaf photosynthetic pigment content and gas exchange parameters,we sought to clarify these interactions.The research employed a greenhouse experiment with three biochar levels(C0,C50,and C80)and two Trichoderma viridis application rates(T0 and T1).The results revealed that the C50T1 treatment notably enhanced nitrogen uptake by 80.8％and phosphorus uptake by 85.13％,compared to the C0 control,with C80T1 showing a similar upward trend.Additionally,this treatment significantly improved leaf photosynthetic characteristics,including net photosynthetic rate,stomatal conductance,transpiration rate,and chlorophyll content.Furthermore,a strong correlation was observed between the photosynthetic rate and the total accumulation of nitrogen and phosphorus in cucumber plants,as well as other photosynthetic traits.These findings provide deep insights into the synergistic effects of biochar and Trichoderma viridis on cucumber photosynthesis and nutrient absorption,and offer valuable guidance for optimizing the agricultural management of greenhouse vegetables.
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