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| The Effects of Combined Application of Chemical Fertilizers and Microbial Fertilizers on Tomato Growth，Yield，and Quality |
| JIANG Yu，WANG Juan* ，LIU Liyong，TAN Wei，WANG Zhiwei，FENG Yixin，WANG Lin，
LI Jinlong |
| Horticultural Sub-academy，Heilongjiang Academy of Agricultural Sciences，Harbin 150069，Heilongjiang，China |
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Abstract To investigate the effects of combined application of chemical fertilizers and microbial fertilizers on tomato growth and fruit quality，the tomato ‘Guanghui 101’was used as the test material，seven different fertilization treatments were set up，namely no fertilization（CK），formulated fertilization（M-1），conventional fertilization（M-2），chemical fertilizers combined with microbial agents（M-3），and M-1，M-2，M-3 reduced by 1/3 and base fertilizer combined with bio organic fertilizer（M-4、M-5、M-6）．The effects of different fertilization treatments on tomato growth，yield，and quality were studied．The results showed that the tomato plants treated with M-3 had the best growth．Compared with CK，the plant height，stem diameter，and number of internodes increased by 19.44%，13.57%，and 15.15%，respectively，and the differences were significant．The single fruit weight，average fruit set，single plant yield，plot yield，and total yield increased by 3.45%，14.66%，19.35%，18.77%，and 18.77%，respectively．Overall，the combination of microbial agents with chemical fertilizers（M-3）treatment can be considered as the optimal fertilization schemes for tomatoes，which includes the base fertilizer of 750 kg·hm-2 of potassium sulfate，stable nitrogen source mixed fertilizer，and 30 kg·hm-2 of microbial agents（Bacillus subtilis M101，Trichoderma harzianum TH7，and Purpureocillium lilacinum PL22），and top application of massive element water-soluble fertilizer（N∶P∶K = 19∶19∶19）675 kg·hm-2 ，（N∶P∶K = 15∶5∶30）225 kg·hm-2 ，and microbial agents 360 kg·hm-2．
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Received: 20 April 2024
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