Effects of Combined Application of Microbial Fertilizer and Chemical Fertilizer on Production of Chinese Chive and Occurrence Amount of Bradysia odoriphaga

【Objective】The study aimed to clarify the value of microbial fertilizer in the production of Chinese chive, and screen the best scheme for combined application of microbial fertilizer with chemical fertilizer in the high quality and safe production of Chinese chive and control of Bradysia odoriphaga.【Method】Xuejiu 791 was taken as the research object, 8 treatments of microbial fertilizer combined with chemical fertilizer were set up, namely, the recommended amount of chemical fertilizer combined with 30%, 50%, 70%, 100% of the recommended amount of microbial fertilizer (T2~T5), and the recommended amount of microbial fertilizer combined with 70%, 50%, 30%, and 0% of the recommended amount of chemical fertilizer (T6~T9). The effects of different fertilization schemes on the yield and growth traits of Chinese chives was estimated by indoor single factor experiment to screen the better fertilization schemes; and the effects of above better fertilization schemes on the yield and quality of Chinese chives and the occurrence of B. odoriphaga were verified by field experiments.【Result】The indoor experiment showed that the growth traits of Chinese chives were significantly improved by microbial fertilizer, with plant height, stem diameter, maximum leaf width, plant weight per plant and number of fibrous root significantly increased. Among all the fertilization schemes, the best growth traits of Chinese chives were found in T5, T6, and T7 treatment, especially for plant height, which was 27.87, 27.59 and 28.84 cm, respectively, and significantly differed from that in other treatments. The weight per plant was 0.99, 0.93 and 0.94 g, respectively, which was significantly different from that in other treatments except T4 and T9. The growth traits of Chinese chives did not differ among T5, T6 and T7. Based on the above results and the economic point of view, T6 and T7 were judged to be the optimal fertilizer scheme. The result of field experiment showed that the application of T6 scheme of indoor experiment (FT6 treatment) significantly increased the plant weight, stem diameter, pseudostem length, plant height, maximum leaf width and number of fibrous root of Chinese chives in greenhouse by 29.41%, 1.70%, 12.19%, 7.58%, 17.23% and 40.60%, respectively, compared to the control (FT1). The application of T7 scheme of indoor experiment in field (FT7 treatment) significantly increased the weight per plant, stem diameter, pseudostem length, maximum leaf width and number of fibrous root of Chinese chives by 23.22%, 4.21%, 11.94%, 9.47% and 16.99%, respectively, compared to the control (FT1), but the increase amplitude of each growth character was less than that in FT6. The yield of Chinese chives in FT6 and FT7 treatment was significantly increased by 48.39% and 12.99%, respectively compared to FT1. The quality of Chinese chives in FT6 and FT7 treatment was significantly improved, soluble sugar content and soluble protein content were increased by 32.72%, 10.45% and 6.76%, 6.60%, respectively, compared to FT1. The growth traits of Chinese chives in FT6 were better than those in FT7. FT6 and FT7 treatment inhibited the occurrence of B. odoriphaga, and the inhibition rates were 50.15% and 22.16%, respectively, compared to the control.【Conclusion】Compared with the single application of chemical fertilizer, the combined application of microbial fertilizer and chemical fertilizer effectively improve the yield and quality of Chinese chive, and inhibit the occurrence of B. odoriphaga. The best recommended scheme was 70% of the recommended amount of fertilizer combined with 100% of the recommended amount of microbial fertilizer.