Abstract:

The study aims to explore the application potential of farmyard manure in flue-cured tobacco production, improve the unfavorable ecological environment of tobacco planting soil and enhance the quality of tobacco leaves. Farmyard manure was used as the test material, and combined application of farmyard manure and flue-cured tobacco special compound fertilizer was conducted. The farmyard manure application rate was set as CK: 0 kg/hm², T1: 1500 kg/hm², T2: 3000 kg/hm², T3: 4500 kg/hm² and T4: 6000 kg/hm², to study the effects of farmyard manure on soil physicochemical properties and the growth and development of flue-cured tobacco. The results showed that compared with CK, farmyard manure could improve soil pH, and the content of soil organic matter, total nitrogen, available phosphorus and available potassium to some extent. Soil organic matter content increased by 101.9%, 78.1%, 53.7%, and 83.3% under the four application rates, and the positive effect was gradually enhanced with the increase of the application rate. In terms of tobacco growth, T1 had the best effect among the treatments. Compared with those of CK, the plant height, stem circumference, maximum leaf and next but two leaf growth were promoted under T1, and the yield and output value of flue-cured tobacco increased by 192.75 kg/hm² and 7776.0 yuan/hm², respectively. Therefore, in flue-cured tobacco production, the application rate of farmyard manure of 1500 kg/hm² is the best, which is beneficial to improving the yield and quality of tobacco leaves.

Key words: flue-cured tobacco, soil, yield, output value, farmyard manure, flue-cured tobacco, soil, yield, output value