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    Effects of traditional Chinese medicine residue with cow dung on earthworms growth and material physicochemical properties
    LI Yang, MA Zhan-fei, MA Xiao-yong, KANG Jun-gang, WANG Ya-bo, ZHU Yun-di, ZUO Jin-yan, JIANG Guo-jun
    HUBEI AGRICULTURAL SCIENCES    2023, 62 (3): 52-57.   DOI: 10.14088/j.cnki.issn0439-8114.2023.03.010
    Abstract420)      PDF (1485KB)(76)       Save
    In order to solve the problem of environmental pollution caused by fecal waste in livestock production and traditional Chinese medicine residues, and to explore a new way of resource utilization of traditional Chinese medicine residues and cow manure, the experiment set treatment A (cow manure + residues of radix Astragalus and Epimedium after decoction), treatment B (cow manure + Astragalus), treatment C (cow manure + Epimedium) and treatment D (cow manure, control) to feed the late larvae of earthworms. The effects of these treatments on the weight, body length, cocoon production, incubation time and hatching rate of earthworms were observed. The results showed that the growth trend of earthworms increased first and then decreased under the four treatments. The residue of radix Astragalus and Epimedium after decoction could significantly improve the growth and reproductive performance of earthworms. Earthworm composting could increase the content of total nitrogen and pH of materials, and reduce the content of organic carbon. The composting of residues of radix Astragalus and Epimedium after decoction with cow manure could also increase the content of total phosphorus.
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    Suitable nitrogen application rate of three flue-cured tobacco varieties in high-altitude tobacco area of Xuanwei City
    PAN Yi-hong, CAI Xian-jie, DENG Tao, ZHANG Xiao-long, WEI Qi-li, MA Ai-guo, WU Shu-jun, LIU Yun-fang, YAN Ding
    HUBEI AGRICULTURAL SCIENCES    2023, 62 (3): 58-64.   DOI: 10.14088/j.cnki.issn0439-8114.2023.03.011
    Abstract484)      PDF (1483KB)(90)       Save
    In order to explore the suitable nitrogen application rate for high-quality flue-cured tobacco varieties in the high-altitude tobacco area of Xuanwei City, Yunnan Province, the field test comparison method was adopted in 2020 to study the economic properties, physical properties, appearance quality, chemical composition and sensory evaluation quality of three flue-cured tobacco varieties with different nitrogen application rates in the high-altitude tobacco areas. The results showed that Yunyan 105 had the best economic benefits when the nitrogen application rate was 97.5 kg/hm2, and the comprehensive quality of flue-cured tobacco was the best when the nitrogen application rate was 112.5 kg/hm2. When the nitrogen application rate of Yunyan 301 was 97.5 kg/hm2, it was helpful to improve the coordination of chemical components, sensory evaluation quality and appearance quality of tobacco leaves, and the comprehensive quality was good; when the nitrogen application rate was 112.5 kg/hm2, the economic benefit was the best. Zhongchuan 208 had good economic benefits and comprehensive quality when the nitrogen application rate was 97.5 kg/hm2 and 112.5 kg/hm2. When the nitrogen application rate of Zhongchuan 208 was 97.5 kg/hm2, it was beneficial to improve the sensory evaluation quality of tobacco leaves and maximize the economic benefits. When the nitrogen application rate of Zhongchuan 208 was 112.5 kg/hm2, it was helpful to improve the coordination of internal chemical components and the formation of appearance quality of tobacco leaves, and the economic benefit was good. To sum up, in the high-altitude tobacco area of Xuanwei City, the suitable nitrogen application rates of Yunyan 105, Yunyan 301 and Zhongchuan 208 are 97.5 kg/hm2 to 112.5 kg/hm2.
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