1. 红河烟区土壤养分丰缺状况研究.
- Author
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付亚丽, 黄坤, 陈泽斌, 唐佐芯, 夏体渊, 杨亦凡, 李贤峰, 陆庆华, 任禛, 陈艳芳, and 李银花
- Subjects
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TOBACCO growing , *DEFICIENCY diseases , *SOIL fertility , *SOIL sampling , *TOBACCO - Abstract
[Objective] The present paper aimed to under stand the status of soil nutrient abundance and deficiency in Honghe tobacco-growing area. [Method] 881 tobacco-growing soil samples were collected from different counties (cities) in Honghe tobacco-growing area, and 6 soil nutrient indicators were determined and analyzed. [ Result] The results showed that the average pH value of tobacco-growing soils in 7 counties( cities) was within the suitable growth range of flue-cured tobacco (5. 5 -7. 0), except Shiping county, which was slightly lower. Except for Jianshui ( 23, 66 g/kg) county and Luxi county ( 24. 93g/kg), the average content of organic matter in tobacco-growing soils in other counties( cities) was higher than that in suitable tobacco-growing aoils ( 1S -25 g/kg). The highest proportion of low content of alkali-hydrolyzed nitrogen (AN < 100 mg/kg) was Jianshui county (52. 63 % ), the highest proportion of available phosphorus ( >40 mg/kg) was Shiping county ( 37. 95 % ), the lowest proportion of available phosphorus ( < 20 mg/kg) was Gejiu city ( 90. 47 % ), the highest proportion of excessive water-soluble chlorine ( > 45 mg/kg) was Jianshui county ( 6. 57 % ) . [ Conclusion] The soil nutrient fertility in Honghe tobacco growing area belongs to the middle and upper level, which was more suitable for flue-cured tobacco cultivation. It is suggested that tobacco- growing counties( cities) with slightly poor soil suitability should adjust the existing fertilization schemes according to tobacco leaf quality in order to improve soil nutrient status and tobacco leaf quality. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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