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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (3): 28-34.doi: 10.11924/j.issn.1000-6850.casb2022-0096

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Effects of Organic-inorganic Compound Conditioner on Acidified Soil Properties and Tobacco Yield and Quality

CHEN Zhenlu1,2(), PAN Xiaoying1, LU Yusheng3, HUANG Zhenrui1, GU Wenjie3, GUO Junjie4, WEI Bin4, ZENG Yuling4, LIU Yixuan5, HE Jingwei5, LI Jiqin1()   

  1. 1 Grops Research Institute, Guangdong Academy of Agricultural Sciences/Key Laboratory of Crop Genetic Improvement of Guangdong Province/Guangdong Provincial Engineering & Technology Research Center for Tobacco Breeding and Comprehensive Utilization, Guangzhou 510000
    2 China National Tobacco Corporation, Guangdong Province, Guangzhou 510000
    3 Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640
    4 Guangdong Tobacco Meizhou Co., Ltd., Meizhou, Guangdong 514000
    5 Guangdong Tobacco Meizhou Co., Ltd., Dapu County Branch, Dapu, Guangdong 514200
  • Received:2022-02-15 Revised:2022-04-06 Online:2023-01-25 Published:2023-02-01

Abstract:

The study verified the field application effect of organic-inorganic compound conditioners on tobacco, aiming to provide a theoretical basis for the subsequent popularization and application. Five treatments were set up in field experiments, which were T1: no conditioner (CK), T2: organic-inorganic compound conditioner (1500 kg/hm2), T3: organic-inorganic compound optimal conditioner (1500 kg/hm2), T4: marine conditioner (1500 kg/hm2) and T5: biochar (1500 kg/hm2). A randomized block design was used to compare the effects of different treatments on soil properties and tobacco yield and quality. The results showed that: (1) the application of conditioners significantly improved the agronomic characters of tobacco plants, as well as the yield and quality of tobacco; the plant height, effective leaf number, stem circumference and maximum leaf length under organic-inorganic compound optimal conditioner were improved by 8.53%, 14.19%, 7.40% and 8.21%, respectively, compared to those of the control; and the yield, output value and average price were significantly improved by 28.76%, 46.98% and 14.16%, respectively, compared to those of the control; (2) the total nitrogen, nicotine, potassium, chlorine, protein contents and nitrogen-alkali ratio under all the treatments were within the appropriate range, and the chemical components of marine conditioner treatment were relatively coordinated; (3) compared to the control, the organic-inorganic compound optimal conditioner significantly increased the soil pH unit by 0.32, with its urease activity increased by 26.23%; the two organic-inorganic compound conditioners both increased the number of bacteria and actinomycetes in soil, and increased the content of available potassium by more than 20.53%; the content of exchangeable calcium and exchangeable magnesium under all conditioners were higher than those of the control; under marine conditioner treatment, the content of exchangeable calcium and exchangeable magnesium were 152.37% and 56.34% higher than those of the control, and the activity of invertase and dehydrogenase increased by 93.67% and 78.65% compared to those of the control. To sum up, the organic-inorganic compound optimal conditioner has the best effect on improving acid tobacco sandy mud field and tobacco yield and quality, followed by marine conditioner.

Key words: acidified soil, organic-inorganic conditioner, soil nutrients, tobacco, soil enzyme activity, microbial colony