Abstract:

To study the law of nitrogen content and nitrogen allocation in flue-cured tobacco organs under fermented soybean cake and to determine the nitrogen supply strength of the fermented soybean cake. The tests used ‘Longjiang 911’ as test materials and with random block design, Three treatments were applied for the pure inorganic fertilizer, 50% of the fermented soybean cake and 50% inorganic fertilizer application, 100% use fermented soybean cake, All treatment NPK fertilizer were 52.50 kg/hm2, 52.50 kg/hm2, 105.00 kg/hm2, repeat 3 times. The results showed that: root nitrogen content decreases with the growth period of delay, compared with the control, the fermented soybean cake treatment nitrogen content difference of the control was 0.02%-0.05% and no significant difference; stem nitrogen content within the fermented soybean cake treatment difference of the control was 0.01%-0.05% and no significant difference between all treatment; lower leaves nitrogen content within the fermented soybean cake treatment difference of the control was 0.08%-0.26% and no significant difference between all treatment; upper leaves nitrogen content that fermented soybean cake treatment was significantly lower than controls; the fermented soybean cake treatment would not change the distribution of various organs nitrogen ratio. Comprehensive analysis that fermented soybean cake nitrogen supply can be achieved with inorganic fertilizer and application ratio can reach 50% to 100%.